CROWN RTA-2 - Analyseur audio

RTA-2 - Analyseur audio CROWN - Free user manual and instructions

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Product Type Real Time Audio Analyzer (RTA)
Dimensions 19 x 7 x 15 inches (48.3 x 17.8 x 38.1 cm) behind rack mounting surface
Weight 22 lb (10 kg) net
Power Supply 100, 120, 200, 220, 240 VAC selectable via internal jumpers; 1/8A MDL fuse for 100/120V, 1/16A MDL for 200/220/240V
Frequency Range 16 Hz to 20 kHz
Filters 32 single-pole pair 1/3-octave bandpass filters; selectable 1/3 or 1 octave display
Display 5-inch CRT with graduated overlay; blue/green P31 phosphor at 2 kV
Inputs Unbalanced (1 MΩ, ¼" phone jacks front and rear), Balanced (2 kΩ, female XLR front)
Controls Power, Fast/Slow integration, dB/division (5 or 10), Full/1/3 octave, Input level (0-70 dB in 10 dB steps plus 40 dB vernier), Calibration positions
Pink Noise Generator Pseudo-random multiple feedback, 20-stage; repetition rate 2.1 seconds; ±0.5 dB accuracy 16 Hz-20 kHz; balanced and unbalanced outputs
Accessories Supplied Instruction manual, proof of performance sheet, 6-ft pin-to-phone cable, 6-ft male XLR-to-female XLR cable, 4 thumb screws, 4 washers
Maintenance Clean with soft cloth moistened with mild detergent and water; avoid harsh chemicals
Safety High voltage inside (up to 1800 V); no user-serviceable parts; refer servicing to qualified technician; do not expose to rain or moisture
Spare Parts Available from Crown; specify model and serial number; many standard parts available from electronic supply houses
Service Policy Factory service recommended; warranty requires return to factory or approved service station; use original packing for shipment

Frequently Asked Questions - RTA-2 CROWN

What is the Crown RTA-2 used for?
The RTA-2 is a real-time audio analyzer used to measure and display the frequency response of sound systems, components, or rooms. It helps sound engineers identify where equalization adjustments are needed.
How do I calibrate the RTA-2?
Vertical calibration: Set pink noise output to 3 o'clock, vernier input to CAL, stepped attenuator to LOW, position trace at bottom line, then move to HI and adjust vertical gain for 20 dB rise. Horizontal calibration: Set octave switch to 1/3, position trace at ditto marks for 16 Hz, then adjust horizontal gain so the right end touches the line beyond 16 kHz.
What types of inputs does the RTA-2 have?
It has both unbalanced (1 MΩ, ¼" phone jacks front and rear) and balanced (2 kΩ, female XLR front) inputs. Line-level signals (75 mV–25 V) and microphone-level signals (with adjustable gain) can be used.
How do I change the AC mains voltage?
Open the unit and reposition internal jumpers according to Fig. 3.7. For 100 V: jumper A-D and B-E, black wire to E; 120 V: A-D and C-F, black wire to F; 200 V: B-D, black to E; 220 V: B-D, black to F; 240 V: C-D, black to F. Also change the fuse: 1/8A MDL for 100/120V, 1/16A MDL for 200/220/240V.
What is the pink noise generator used for?
The built-in pink noise generator produces a pseudo-random pink noise signal used for testing and analyzing sound systems. It has a built-in pink filter accurate to ±0.5 dB from 16 Hz to 20 kHz and can be attenuated by 40 dB for mic-level output.
How do I prevent CRT phosphor burn?
The RTA-2 includes an automatic beam intensity reduction circuit that dims the trace if no signal is applied for about 2 seconds. To further protect the CRT, avoid displaying a stationary bright dot or line for extended periods.
What does the overload indicator mean?
The red overload LED illuminates when the input signal exceeds a preset level. If it lights, increase attenuation using the input level control (stepped and vernier) to prevent distortion.
How should I clean the RTA-2?
Use a soft cloth moistened with mild detergent and water. Avoid harsh cleaning agents, and never allow liquids to spill into the unit, as this can void the warranty.
What accessories are supplied with the RTA-2?
The unit includes: instruction manual, proof of performance sheet, 6-ft pin-to-phone cable, 6-ft male XLR-to-female XLR cable, 4 thumb screws, and 4 washers.
Where can I get service or spare parts?
For service, return the unit to Crown International in the original packing; for warranty service, go to the factory or an approved service station. Spare parts can be ordered from Crown using the model and serial number; many standard parts are also available from electronic supply houses.

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Download the instructions for your Analyseur audio in PDF format for free! Find your manual RTA-2 - CROWN and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. RTA-2 by CROWN.

USER MANUAL RTA-2 CROWN

INSTRUCTION MANUAL

RTA-2

REAL TIME ANALYZER

CROWN INTERNATIONAL, INC. 1718 W. MISHAWAKA RD. ELKHART, INDIANA 46517

The information furnished in this manual does not include all of the details of design, production, or variations of the equipment. It does not cover all the possible contingencies which may arise during operation, installation, or maintenance. Should special problems arise, or further information be desired, please contact the Crown International Customer Services Department.

Crown International

1718 W. Mishawaka Rd.

Elkhart, Indiana 46517

Ph: (219) 294-5571

WARNING

TO PREVENT SHOCK OR FIRE HAZARD DO NOT EXPOSE TO RAIN OR MOISTURE!

TABLE OF CONTENTS

Section 1 General Information

1.1 Introduction....1-1
1.2 Purpose of Equipment 1-1
1.3 Units and Accessories Supplied 1-1
1.4 Required - Not Supplied 1-1
1.5 Service Policy 1-1
1.6 Glossary of Terms.... 1-2

Section 2 Specifications and Performance

2.1 Specifications 2-1
2.2 Performance Graphs....2-3

Section 3 Installation and Operation

3.1 Function 3-1
3.2 Unpacking and Inspecting 3-1
3.3 Installation 3-1
3.4 Operating Precautions 3-1
3.5 Operation and Control Functions 3-2
3.6 Rear Panel Controls and Connections 3-5
3.7 Phantom Power Supply 3-6
3.8 Modifying AC Mains Voltage 3-6

Section 4 Technical Aspects of Unit

4.1 General 4-1
4.2 Principles of the RTA-2....4-1
4.3 Block Diagram Circuit Theory 4-1
4.4 Detailed Circuit Theory 4-3

Section 5 Parts List

5.1 General 6-1
5.2 Standard and Special Parts 6-1
5.3 Ordering Parts....6-1

LIST OF ILLUSTRATIONS

Fig. 1.1 RTA-2 1-1
Fig. 2.1 Frequency Response; Mic Amplifier....2-3
Fig. 2.2 Frequency Response; Pink Noise Generator 2-3
Fig. 2.3 Beam Gate Threshold 2-4
Fig. 2.4 1/3 Octave*Filter Characteristics....2-4
Fig. 3.1 Mounting Dimensions....3-1
Fig. 3.2 Scope Section 3-2
Fig. 3.3 RTA Section....3-3
Fig. 3.4 Pink Noise Section 3-4
Fig. 3.5 Rear Panel 3-5
Fig. 3.6 Pink Noise/Input Board 3-6
Fig. 3.7 AC Mains Voltage 3-7
Fig. 4.1 Block Diagram 4-2
Fig. 4.2 RTA-2 Schematic Diagrams 4-5

SECTION 1 GENERAL INFORMATION

1.1 Introduction

Based on mathematics established over 100 years ago by the French mathematician, Baron Jean-Baptiste Fourier, modern spectrum analysis provides a graphic representation of frequency versus amplitude in "real time".

With the information gained, one can see the frequency response of a sound system or any component in a system, and note where amplitude boosts or cuts are needed. The necessary adjustments can be made either electronically -as through an equalizer or acoustically -as with acoustic partitions.

This instruction manual is intended to aid its reader during the operation of the Crown Real Time Analyzer. Comments regarding the contents of this booklet will be accepted by the Crown Manual Department, 1718 W. Mishawaka Rd., Elkhart, Indiana 46517

1.2 Purpose of Equipment

The purpose of the CROWN RTA-2 (Fig. 1.1) is to provide the sound engineer with a quick and accurate means for checking the overall frequency response and other parameters of a sound system or any component of a system. That system could be a closed system - such as a tape deck amplifier, pre-amplifier, power amplifier, etc. or an open system, i.e. a living room, a high school auditorium or any other acoustically sore area.

CROWN RTR-2

Fig. 1.1 RTA-2

1.3 Units and Accessories Supplied

1 RTA-2 instruction manual
1 proof of performance sheet
1 6-ft pin to phone cable
1 6-ft. male XLR to female XLR cable
4 thumb screws
4 washers

1.4 Required - Not Supplied

Equalizer

Calibrated microphone

(The above items are required for room equalization.)

1.5 Service Policy

Because of the complexity of its circuitry and high CRT (Cathode Ray Tube) voltages, the RTA-2 should be serviced only by a fully trained service technician. As a reminder, please observe the following labels on the rear panel of the unit which read:

WARNING:

HIGH VOLTAGE CIRCUITRY

INSIDE ELEVATED TO 1800 VOLTS

CAUTION: TO PREVENT ELECTRIC SHOCK DO NOT OPEN. NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO A QUALIFIED TECHNICIAN.

For service, return the unit to the factory in the original packing or in replacement packing obtainable from the Crown factory. For warranty service, the unit must be returned to the factory or an approved service station (Amcron customers consult your local representative). In either case, fill out and enclose the Service Information form located at the rear of this manual. This will help to ensure a speedy and effective response.

Crown will pay shipping costs (in the U.S.) for warranty service upon receiving copies of all shipping receipts.

All shipments should be sent UPS or truck freight (insured). The factory will then return your serviced unit by one of the above methods.

Upon receipt of the warranty registration card from your dealer, Crown will register your unit on our computer warranty file.

Retain your copy of the bill of sale from your Crown dealer. This is your proof of purchase.

When you need service for your unit from an authorized Crown Service Station, simply present your bill of sale. With it, the service station can promptly initiate any needed paperwork. It will save you time and effort.

The bill of sale is also your proof of ownership should you need it for insurance or legal reasons.

1.6 Glossary of Terms

A-B Test: Evaluating relative performance of two (or more) components or systems by changing quickly from one to the other. Most high fidelity dealers have A-B test facilities.

AGC: Automatic Gain Control. A type of circuit used to maintain the output volume of a receiver constant, regardless of variations in the signal strength applied to the receiver.

Attenuation: A decrease in signal magnitude from one point to another, or the process causing this decrease.

Balanced Input: A three wire input system where the voltages and currents in two of the wires are equal in magnitude but opposite in polarity with respect to ground which is the third wire. The impedance of a balanced input is usually low. (600 ohms or less)

Balun: A device used for the transformation from an unbalanced line or system to a balanced line or system, or vice versa. The term is derived from balance to unbalance transformer.

Bandpass Filter: A filter that allows transmission of alternating signals whose frequencies are between given upper and lower cutoff values, while substantially attenuating all frequencies outside this band.

Biamp: The use of independent amplifiers to feed the bass and treble portions of a loudspeaker or loudspeakers with a crossover network. The purpose is to help reduce intermodulation between bands when a system is overloaded. It also reduces the cost of implementing good, low loss precision crossover networks.

Butterworth Filter: A filter that exhibits the flattest possible response in the passband. The response rolls off smoothly into the stop band, where it approaches a constant slope of 6n db/octave; where n is the number of poles in the network, i.e. a single pole is 6dB, two pole 12dB, 3 pole 18dB, etc.

Capture Ratio: The ability of a receiver to reject a weaker station whose frequency is the same as that of the desired station. This measurement will be in dB. The smaller the figure, the better the spec.

Ceramic Filter: A bandpass filter using a piezoelectric substrate material.

Channel: A channel is a complete sound path. A single channel, or monophonic system, has one channel. A stereophonic system has at least two full channels designated as left (A) and right (B). Monophonic material may be played through a stereo system; both channels will carry the same signal. Stereo material, if played on a monophonic system, mixes and emerges as a monophonic sound.

Channel Separation: Specified in dB, channel separation is the ratio of the measurable output of one channel to the unwanted output of the (undriven)opposite channel.

Clipping: The truncation of peaks of a signal due to exceeding the operating range of an electronic circuit. Normally, it refers to the result of voltage limitations in the circuit.

Corner Frequency: The frequency at which a filter goes from a condition of passing the signal unattenuated to "rolling off" or attenuating the signal according to its frequency. It is sometimes referred to as the "cutoff" frequency or the "break" frequency. It is also defined as 3dB below the unattenuated output level of the signal.

Cross Modulation: In FM signals, a type of intermodulation that occurs when the carrier of the desired signal is modulated by an undesirable signal. Each signal is of independent origin.

Crossover Frequency: The frequency at which a dividing network delivers equal power to the upper and lower frequency channels when both are terminated in specified loads.

Crossover Network: A selective network used to divide the audio frequency output of an amplifier into two or more bands of frequency. The band below the crossover frequency is fed the woofer loudspeaker while the high frequency band is fed to the tweeter. Also called dividing network and loudspeaker dividing network.

Crosstalk: Signal leakage from one signal source into another.

Damping: Controlling of vibrations, response, or resonances which if unchecked, would cause coloration of the sound.

Damping Factor: A numerical indication of an amplifier's ability to decrease unwanted loudspeaker movements. Damping factor can be found by dividing the load impedance by the amplifier's output impedance.

crown

Decibel: A numerical expression of acoustic or electrical ratios, such as the relative intensity of a sound or the relative strength of a signal. One (dB) is about the smallest change in sound perceptible to the ear.

Decoder: A matrix of logic elements that selects one or more output channels according to the combination of input signals present. Can be used in FM to recover stereo signals of a stereo encoded multiplex transmission.

De-emphasis: In FM signals, restoring the pre-emphasized (for proper transmission characteristics) signal to result in a "flat" frequency response curve.

Distortion: Unwanted noise, or sounds which didn't exist in the studio when the original recording was made. Harmonic distortion produces tones harmonically related to a single, pure tone. Intermodulation distortion (IM) introduces new tones caused by mixing of two or more original tones. Phase distortion, or non-linear phase shift, disturbs timing sequence between a tone and its related overtones. Distortion which creates new spectra are expressed in percentages and phase distortion in degrees of phase shift or seconds of group delay vs. frequency errors.

Dynamic Range: The difference between the most intense and the least intense levels in a sound system.

EAROM: EAROM stands for Electrically Alterable Read Only Memory which is an integrated circuit chip used to store information without power applied (used in the FM1).

Equalization: Frequency response manipulation to meet the requirements of recording, and an inverse manipulation on playback to restore the original. Also known as compensation for acoustic problems of listening rooms.

Feedback: Sending a "part" of a system's output back to the input. Positive feedback may lead to unstable conditions such as PA system "howling" due to sound from the speakers being fed back thru the microphone and amplified again. Another form is low frequency interference created when vibrations from loudspeakers are picked up by the cartridge and amplified again. However, carefully controlled negative feedback in electronic circuits can be used to help reduce distortion and control stability.

Flutter: Rapid variation in the speed of a turntable or tape transport. Flutter causes a wavering of musical pitch.

Frequency Response: This term indicates any amplitude variations in a system output signal with respect to frequency. This measurement is made with a constant level input signal.

Gain: The ratio of an amplifier's output voltage to its input voltage.

Headroom: Stated in dB, headroom is the difference between the signal level and the limits of the sound system ie; the ratio of power available to power used.

Hertz: As in cycles-per-second, not rental agency.

High Pass/Low Pass Filter: High pass - a filter having a single transmission band extending from some critical, or cutoff, frequency other than zero, up to infinite frequency. Low pass - a filter network which passes all frequencies below a specified frequency with little or no loss but discriminates strongly against higher frequencies.

IF: An Intermediate Frequency is a frequency to which a signal wave is shifted locally as an intermediate step in FM transmission or reception.

Image Response: Response of a superheterodyne receiver to the image frequency, as compared to the response to the desired frequency.

Input Sensitivity: The input voltage required to drive an amplifier to its rated output.

IOC™: Stands for Input-Output Comparator. An extremely sensitive Crown circuit used to indicate, via a front panel LED, the fact that the operating limits of an amplifier are being exceeded resulting in output nonlinearity.

LED: Light Emitting Diode. A PN junction that emits light when biased in the forward direction.

Limiter: A circuit in which the output amplitude is substantially linear with regard to the input up to a predetermined value and substantially constant thereafter.

Load: A device that absorbs power and converts it into the desired form.

LSI: Large Scale Integration is an integrated circuit chip housing a large number of active devices.

Mixer: A device having two or more inputs, usually adjustable, and a common output, which operates to combine linearly in a desired proportion the separate input signals to produce an output signal.

Monitoring Amplifier: A power amplifier used primarily for evaluation and supervision of a program.

Multipath Delay: In FM the existence of more than one signal path between transmitter and receiver. The two signals arriving at different times causes distortion.

Music Power: This rating expresses the ability of an amplifier to handle short duration power peaks, as opposed to sustained power levels. An amplifier may only be capable of putting out 45 watts if that level is continuous, but it may be able to handle 60 watt peaks (such as might occur in a musical passage), if the peaks do not last too long.

Muting Circuit: In FM, a circuit which cuts off the receiver output when the r-f carrier reaching the first detector is at or below a pre-determined intensity.

Pre-emphasis: A process in a system designed to emphasize the magnitude of some frequency components with respect to the magnitude of others, to reduce adverse effects, such as noise, in subsequent parts of the system.

PLL: Phase Lock Loop; a circuit for synchronizing a variable local oscillator with the phase of a transmitted signal. Can be used in FM as a synthesizer circuit as well as a stereo decoder in the multiplex system.

Polar Curve: A pattern used to show the directional characteristics of antennas, microphones or speakers.

Quartz Crystal: A complete assembly, comprising a piezoelectric quartz-crystal element mounted, housed, and adjusted to the desired frequency. Such a device is commonly employed for purposes of frequency control, frequency measurement and electric wave filtering.

Rotor: A motor driven assembly which turns an antenna so that it can be aimed in the direction of best reception.

SAW Filter: Surface Acoustic Wave; commonly used as a bandpass filter. Device transmitts surface acoustic waves on a piezoelectric substrate. Used in the FM1 for low FM distortion.

Selectivity: In FM a measure of the extent to which a receiver is capable of differentiating between the desired signal and disturbances at other frequencies.

Sensitivity: A receiver specification indicating the smallest input signal strength required to produce an output signal whose characteristics are standardized and used as a reference.

Signal: A visible, audible or other conveyor of information.

Signal-To-Noise-Ratio: Measured in dB, signal to noise ratio is a relative term meaning the ratio between the desired output signal and the interference or noise. A typical figure would be 60dB which stands for a ratio of 1000-1.

Superheterodyne: A method of receiving radio waves in which the process of heterodyne reception is used to convert the voltage of the received wave into a voltage of an intermediate, but usually superaudible frequency, that is then detected.

Synthesizer: A Phase Lock Loop (PLL) system which constructs an oscillator signal by phase locking it to a reference times (X) the ratio of two integers (reference is usually a quartz crystal oscillator).

Triamp: The use of three separate amplifiers to drive the high, middle and low frequency sections of a speaker system.

Varactor: A two terminal semiconductor device in which the electrical characteristic of primary interest is a voltage-dependent capacitance. Used in FM tuner inputs for voltage controlled timing.

Wow: Distortion caused in sound reproduction by slow variation in speed of the turntable or tape. (See flutter.)

SECTION 2 SPECIFICATIONS AND PERFORMANCE

2.1 Specifications

Frequency range: 16Hz to 20KHz

Filters: thirty-two "single pole pair" 1/3-octave bandpass filters centered on 1/3-octave intervals.

Display Modes: 1/3 or 1 octave, push button selected. (Octave filters are combinations of 1/3-octave filters.)

Sensitivity:

Indication
Full Scale-60dB
Unbalanced
15.2mV to 150V max in*15.2uV to .5V*
Balanced
.76mV to 3V max in*.76uV to 3V max in*
Unbalanced
1mV/√Hz min **1uV/√Hz**
Balanced
50uV/√Hz**50uV/√Hz**

*Sinusoidal test signal centered on any filter frequency in 1/3 or 1 octave display modes.

**Gaussian pink noise source whose intensity is referenced @1KHz.

The balanced (mic) preamp is adjustable from 10dB to 26dB using an internal gain set. Set to 20dB at factory. All filters and input amplifiers monitored for overload with catch-and-hold LED (red) with 75 msec hold time.

Overall Display Accuracy: (At any filter center frequency. Figures shown are for 5dB/division range. Add ±1dB to figures if in 10dB/division range.) Full scale to -40dB: ±1.0dB -40dB to -50dB: ±1.5dB -50dB to -60dB: ±3.0dB

Detector Time Constants: Full wave average responding detectors with dual time constants of 15ms and 47ms (fast) or 15ms and 375ms (slow), push button selectable.

Scan: 32 channels in 16.6ms.

Inputs:

Unbalanced: 1 megohm (¼" phone jacks front and rear, front priority).

Balanced: 2K ohm (female XLR connector on front).

Controls: Power switch (with orange LED "on" indicator).

Fast/Slow integration rate select (16Hz-630Hz).

Fast/Slow integration rate select (800Hz-20KHz). (5 or 10) dB per division select.

Full or 1/3 octave display select.

Input level (0-70dB, 10dB steps; 40dB range vernier). Internal balanced-input gain control.

Calibration: Two identified positions on input level control differ by 20dB ±2%.

Dimensions: 19 x 7 x15" (48.3 x 17.8 x38.1cm) behind rack mounting surface. EIA 19" rack mount.

Weight: 22 lb. (10Kg) net.

Color: Satin and charcoal grey with black knobs and bezel. Blue filtered graticule. Phosphor is P31 (blue/green at 2KV).

Environment: 0-50°C. Should be transported as baggage only in optional shipping case.

NOISE GENERATOR

Type: Pseudo-random multiple feedback, 20 stage, optimized for sonic performance.

Repetition rate: 2.1 second.

Pink Filter Accuracy: ±.5dB, 16Hz-20KHz, limited @ 10Hz and 40KHz by .1dB Chebyshev filters.

Controls: On/Off (push/pull)

Output level vernier attenuator

Max Output Level: 1.1V rms min, crest factor 4.4.

Output:

Attenuator switch setting:0dB40dBConnector
Balanced output600 ohm50 ohmMale XLR front
Unbalanced output300 ohm25 ohm 14 " phone jack fron and rear

DISPLAY CRT

OUTPUTS: 0-10V ramp at scan rate for external display driving (f axis) 2-8V log output (10dB/volt) (amplitude axis). Both outputs are 600 ohm unbalanced with rear-panel phono jack connectors.

Inputs (external): Two sets of X-Y inputs may be switch selected (Aux 1, Aux 2). Each input has rear-panel phono jack and attenuator control. Input impedance 25K ohm ±30%. Beam intensity automatically reduced if no signal (2 sec. delay) to prevent phosphor burn.

Controls: Intensity, focus, graticule illumination, horizontal gain*, horizontal positon*, vertical gain*, vertical position, input select, astigmatism (rear).

*Screwdriver adjust.

2.2 Performance Graphs

CROWN RTA-2 - Performance Graphs - 1

line | HERTZ | dB (A) | dB (B) | |-------|--------|--------| | 10 | -0.5 | -0.2 | | 100 | -0.3 | -0.1 | | 1k | -0.1 | 0.0 | | 10k | 0.0 | 0.1 | | 100k | 0.2 | 0.3 |

Fig. 2.1 Frequency Response: Mic Amplifier; A - 20dB Gain B - Minimum Gain

CROWN RTA-2 - Performance Graphs - 2

line | Frequency | Amplitude | | --------- | --------- | | 10Hz | -3dB | | 100Hz | -1dB | | 1KHz | 0dB | | 10KHz | -1dB | | 100KHz | -3dB |

Fig. 2.2 Frequency Response; Pink Noise Generator

CROWN RTA-2 - Performance Graphs - 3

line | Hertz | Volts RMS (A) | Volts RMS (B) | |-------|---------------|---------------| | 10 | ~0.03 | ~0.03 | | 100 | ~0.03 | ~0.03 | | 1k | ~0.03 | ~0.03 | | 10k | ~0.04 | ~0.03 | | 100k | ~0.05 | ~0.03 |

Fig. 2.3 Beam Gate Threshold;
A - Aux 1 Horizontal Input
B - Aux 1 Vertical Input

CROWN RTA-2 - Performance Graphs - 4

line | Hertz | Value | |---------|--------| | 1Hz | -60dB | | 10Hz | -20dB | | 100Hz | 0dB | | 1KHz | -20dB | | 10KHz | 0dB | | 100KHz | -20dB |

Fig. 2.4 1/3 Octave Filter Characteristics

SECTION 3 INSTALLATION AND OPERATION

3.1 Function

Since the RTA-2 is subject to a wide range of possible mounting methods and operational applications, all possibilities could not be covered in this manual. Therefore, enough basic information was put into this section to provide you with an overview of the unit's functions and installation specifications.

3.2 Unpacking and Inspecting

Since the RTA-2 was carefully inspected and tested before it left the factory, we recommend that you inspect the unit for any damages that may have occurred during transit. If any damages are found, notify the transportation company immediately. Only the cosignee may initiate a claim with the carrier for damaged parcels. Crown, however, will cooperate fully in such an event. Also, be sure to save the carton as evidence for the shipper's inspection.

In addition, we request that you save all packing material; even if the unit arrives in good shape. Because the carton and internal pack were specifically designed for protection during transit, they will prove valuable in preventing damage should there be occasion to transport the unit.

PLEASE, DO NOT SHIP THE UNIT WITHOUT THE ORIGINAL PACKING MATERIALS!

3.3 Installation

The RTA-2 is packed and shipped in a specially constructed cardboard box. As accessories to the RTA-2, both an anvil case and a shipping case may be purchased through the Crown Parts Department. In addition, the unit may be mounted in a standard 19" electronic equipment rack or an enclosure of your own design. See Fig. 3.1 for mounting dimensions.

3.4 Operating Precautions

  1. The RTA-2 was designed to operate most efficiently at voltages 10% above or below the voltage stated on

19" CROWN RTA - 2 5½" 7" 16½"

15" 16½"

Fig. 3.1 Mounting Dimensions

the rear panel. Operating the unit on voltages outside of this range could harm the unit and invalidate the warranty.

  1. Do not set beverages on top of the RTA-2! In the event of damage caused by liquid spilling into the circuitry, the warranty will also be cancelled.
  2. All Crown products are made to be dependable and stable. However, since the RTA-2 houses a CRT, excessive abuse should be avoided.
  3. Do not expose the RTA-2 to corrosive chemicals such as soft drinks, lye, salt water, etc.
  4. Tampering in the circuit by unqualified personnel or the making of unauthorized circuit modifications invalidates the warranty.
  5. Harsh cleaning agents should be avoided when cleaning the RTA-2. When cleaning becomes necessary, a soft cloth moistened with a mild detergent and water solution is recommended.

POWER OFF ON FOCUS INTEN ILLUM SCOPE POSITION GAIN POSITION GAIN H2A AUX 1 FIX 2

Fig. 3.2 Scope Section

3.5 Operation and Control Functions

The front panel of the RTA-2 is divided into three segments. Each segment is, in effect, autonomous and will be treated as such.

SCOPE (See Fig. 3.2)

The RTA-2 employs a 5" Cathode Ray Tube covered by a graduated overlay. This method of visual indication provides easy viewing as well as accurate measurement. The controls associated with the CRT affect the display in a manner as discussed below.

POWER - turning the power switch causes electrical potentials to be applied to the several control grids of the cathode ray tube as well as the rest of the RTA-2's circuitry.

FOCUS - the focus control works with the rear panel astigmatism control in determining the sharpness of the trace.

INTENSITY - the brightness of the trace is influenced by the intensity control.

ILLUMINATION - two lamps located beneath the CRT bezel provide illumination for the CRT graticule. The illumination control varies the intensity of the illumination.

VERTICAL POSITION - the trace is moved up or down by the vertical position control.

VERTICAL GAIN - the vertical gain control, located just below the vertical position control, adjusts the gain of the vertical deflection amplifier which in turn causes the trace to move upwards or downwards.

HORIZONTAL POSITION - position the trace horizontally by rotating the horizontal position control.

HORIZONTAL GAIN - the gain of the horizontal deflection amplifier is set via the horizontal gain control. The trace is expanded horizontally by rotating this control. (See horizontal calibration)

FUNCTION - the three modes of RTA-2 operation (RTA, AUX 1, AUX 2) represent the three separate input channels available on the RTA-2. While it is possible to simultaneously apply 3 distinct signals to the RTA-2, the unit is capable of displaying only one of those signals at any given moment. The function selector therefore selects which of the applied input signals will be routed to the CRT for display.

In addition to the front panel controls, there are five oscilloscopic controls on the rear panel of the RTA-2. The astigmatism control works with the front panel focus control in determining the crispness of the trace. It is located above and to the right of the high voltage warning label. Lastly, potentiometers are provided for independently adjusting the input sensitivities of the X and Y inputs.

CROWN RTA-2 - SCOPE (See Fig. 3.2) - 1

RTA OVERLOAD IN OUT 600 Hz FAST SLOW 630 Hz -70 HI 20dB CAL LOW CAL INPUT LEVEL A B 10dB DIV 5dB/ DIV C EUL OCTAVE INPUTS D E F H MIC PUSH G

Fig. 3.3 RTA Section

RTA (See Fig. 3.3)

This segment of the unit provides jacks for the application of electrical signals to the analyzer circuitry. Furthermore, the controls and switches of the RTA segment affect the CRT display as follows:

fast/slow

The normal operating position (when displaying program signals) of these switches is IN. This setting allows viewing of the displayed signal with a minimum of averaging. Setting these switches to their OUT position selects detector time constants which provide averaging of the displayed signal such that equalization adjustments can be made with greater ease. The top switch of the two selects those frequencies from 800Hz to 20KHz, while the bottom switch selects frequencies from 16Hz to 630Hz. (Fig. 3.3A)

dB/division

When set to its IN position, the dB PER DIVISION switch selects a vertical CRT sensitivity of 10dB per division. A vertical sensitivity of 5dB per division is selected by releasing the switch to its OUT position. When calibrating the CRT graticule, it is most convenient to select the 10dB per division position.(Fig.3.3B)

full-1/3

You may choose to view the displayed signal in a full 1 octave format or a 1/3 octave format by engaging (IN) or releasing (OUT) the switch labeled FULL - 1/3. A full octave is selected by setting the switch to its IN position. When performing equalization adjustments, it is recommended to begin in the full format, using the 1/3 octave format for fine tuning. (Fig. 3.3C)

overload indicator

The red LED, indicating an overload condition, will glow whenever the amplitude of the input signal exceeds a level preset on a voltage regulator. Should the LED illuminate, a greater amount of attenuation should be selected via the INPUT LEVEL CONTROL.(Fig. 3.3D)

input level

Two portions of the INPUT LEVEL control offer selectable attenuation to all input signals. The outside control adds up to 70dB of attenuation in 10dB steps whereas the inside or vernier portion can further attenuate the signal by 40dB. (Fig.3.3E)

PINK NOISE IN OUT D 40Ω 10Ω C MIN IV- PULL-ON OUTPUT LEVEL BALANCED UNBAL A MIL/CINE OUTPUTS B

Fig. 3.4 Pink Noise Section

PINK NOISE

Access to the pink noise generator signal is made through either one of the front panel jacks (Fig. 3.4A,B) or the pin jack on the rear panel (Fig. 3.5). The pink noise generator is switched on by pulling the front panel output level control (Fig. 3.4C), while the intensity of the signal is controlled by rotating the same control. Also, for a 40dB reduction of signal strength (line level to mic level), the -40dB switch can be depressed. (Fig. 3.4D)

calibration

1. Purpose

A. Vertical Calibration - Vertical calibration causes the markings around the input level attenuator to be in agreement with the markings on the CRT graticule. Also, vertical calibration adjusts the gain of the vertical amplifier so that one vertical division is represented by 5dB or 10dB depending upon the position of the dB/DIV switch.
B. Horizontal calibration ensures that the numbers at the bottom of the CRT graticule will correctly identify frequency locations within the display.

II. Procedure

A. Vertical

  1. Set the pink noise output level control to three o'clock.

  2. Adjust the vernier input level attenuator to CAL (fully clockwise).

  3. Turn the stepped input level attenuator to LOW.

  4. With the vertical position control, position the trace at the bottom graticule line.
  5. Move the stepped input level attenuator to H1.

a. The trace will ascend when you move the stepped input level attenuator to HI. The vertical gain should be set so that the trace will ascend by 20dB. Twenty dB will be represented by 2 or 4 vertical divisions depending on the position of the dB/DIV switch.

Note: In the event where the trace does not ascend by the stated amount, repeat steps 3, 4 and 5.

B. Horizontal

  1. Set the stepped input level attenuator to either HI or LOW.

  2. Set the OCTAVE switch to the one-third octave format (out).

  3. Adjust the vertical position control so that the trace runs through one of the three sets of horizontal ditto marks.

  4. With the horizontal position control, position the trace in a manner whereby the output of the 16 Hz filter falls between the first two ditto marks.
  5. Using the horizontal gain control, set the right end of the trace to touch the first vertical line beyond 16KHz.

CROWN RTA-2 - Horizontal - 1

1-ALUM CROWN A B C D E G H F

Fig. 3.5 Rear Panel

3.6 Rear Panel Controls and Connections

LINE IN

LINE LEVEL inputs accept voltages between approximately 75mv to 25v. This 14 " phone (Fig. 3.5A) jack will be overridden by the insertion of a plug into either one of the two front panel input jacks.

PINK OUT

This pin jack connector (Fig. 3.5B) along with the two front panel jacks, supplies pink noise whose intensity is controlled by the pink noise output level control.

VERT OUT

The vertical output jack (Fig. 3.5C) offers a means of connecting other instruments to the RTA-2 that require a vertical input. Example of this would include connecting the RTA-2 up to a storage scope.

SWEEP OUT

The 60Hz ramp voltage from this jack (Fig. 3.5D) can be used to drive the horizontal (X) input of an oscilloscope.

VERT ADJ-HORIZ ADJ

When viewing an x vs. y display, it may be necessary to increase the sensitivity of the vertical or horizontal input. This is done by turning the vertical or horizontal adjustment screw (Fig. 3.5E,F) with a small flat head screwdriver.

VERT & HORIZ IN

For an x vs. y display, the vertical and horizontal input jacks (Fig. 3.5G,H) are used. Two sets of these jacks are provided, and selected by a front panel control.

ASTIGMATISM

The astigmatism control, (Fig. 3.51) located at the upper right hand corner of the rear panel, is used together with the focus control to adjust the trace for optimum clarity.

CROWN RTA-2 - ASTIGMATISM - 1

natural_image Close-up of electronic components including capacitors, resistors, and a motor (no visible text or symbols)

Fig. 3.6 Pink Noise/Input Board

3.7 Phantom Power Supply

Some condenser microphones require a DC operating voltage. For this reason, a phantom power supply has been built into the RTA-2. This feature is standard on all units with serial number 20869 and above. For units below this number, a slight modification must be made. Referring to Fig. 3.6, locate the PINK NOISE & INPUT board on the underside of the RTA chassis and find jumper "A". Cut this jumper and insert a 14 watt 680 ohm resistor into the two PC board receptacles indicated by "B" of Fig. 3.6. 18 volts will now be available at the balanced input jack on the front panel.

Note: The above modification was based on an AKG451 (CK22) mic. Should any complications arise as a result of this modification, please contact the Crown Technical Services Department.

3.8 Modifying AC Mains Voltage

Fig. 3.7 shows the jumper arrangement for modifying the RTA-2 to operate on 100, 120, 200, 220, and 240 VAC.

* 100 volt operation - jumper A and D, B and E and move black wire to E.
* 120 volt operation - jumper A and D, C and F and move black wire to F.
* 200 volt operation - jumper B and D, and move black wire to E.
* 220 volt operation - jumper B and D, and move black wire to F.
* 240 volt operation - jumper C and D, and move black wire to F.
* Use 1/16A MDL fuse for 200V, 220V, 240V line.
* Use 1/8A MDL fuse for 100V, 120V line.

crown
100 VAC BLK. BLK. GRN. BLK. RED WHT. WHT. GRN WHT. RED A B C D E F 120 VAC A B C D E F 200 VAC A B C D E F 220 VAC A B C D E F 240 VAC A B C D E F WHITE BLK. GREEN

Fig. 3.7 AC Voltages

SECTION 4 TECHNICAL ASPECTS OF UNIT

4.1 General

The RTA-2 Real Time Audio Analyzer came to be as a spin-off of the RTA-1 which, in turn, was a demonstration tool used in conjunction with the CROWN EQ-2 equalizer. Information contained in this section of the manual is by no means meant to be a troubleshooting guide, but merely a brief technical explanation of the unit for those interested.

4.2 Principles of the RTA-2

There are essentially three major sections in the makeup of the RTA-2: the pink noise generator, the oscilloscope, and the audio analyzer. Each are individual circuits within the RTA-2. The noise generator begins with a digitally derived source whose output voltage is white noise. Active filters provide the rolloff and the filtering to change the white noise into pink noise and limit the bandwidth of the signal. An unbalanced, pseudo random pink noise signal is then delivered to the unbalanced jacks while the same signal plus an inverted version is applied to the XLR connector to provide a balanced output signal. Front panel switches control the On/Off function and signal attenuation.

Input terminations to the oscilloscopic circuitry appear on the rear panel of the RTA-2. In addition to horizontal and vertical output connectors, there are two sets of auxiliary input jacks. Adjacent to these jacks are individual sensitivity controls. Signals introduced at either set of auxiliary input jacks are buffered and amplified before being applied to the deflection plates. Front panel controls serve to vary the intensity and focus of the trace; position the trace on the screen and adjust the gain of the horizontal and vertical amplifiers.

As sound is being picked up by a microphone, it is, at the same instant, being transformed into an electrical signal. Connecting this signal to the RTA-2, via an unbalanced or balanced input jack, introduces it to either one or two gain blocks (depending on the strength of the input signal). After the signal has been amplified sufficiently, it is directed to a filter bus and distributed among a group

of 32 filters. Each of the 32 filters is a bandpass filter tuned to a center frequency selected at 1/3 octave intervals across the audio band (20Hz - 20K Hz). Voltages appearing at the output of each filter are then fed to complex multiplexing circuitry which acts in conjunction with the sweep generator to direct the signals in their proper sequence to a logarithmic amplifier. Because the output of the multiplexing circuitry has some 60dB of dynamic range, the signals must be converted logarithmically so that they appear on the screen as linear (dB units).

4.3 Block Diagram Circuit Theory

A 491.5K Hz signal, generated by the master clock, is used to drive the pink noise generator and the frequency dividing network. The output of the pink noise generator is a pseudo-random pink noise signal and is used in testing and analyzing sound systems. (See Fig. 4.1) Signals of line level are introduced - via a front or rear panel jack - to the input attenuator and gain stage. In this stage, the input signal is amplified and sent on to the filters where it is broken down to 32 distinct output voltages according to frequency. A multiplexer has been incorporated along with a sweep generator to provide control voltages that will arrange the analyzed information on the CRT in proper sequence. A logarithmic amplifier is used to convert the multiplexer output signal before it is sent on to the deflection amplifiers. This is done so that the displayed information will appear linear. Vertical and horizontal deflection amplifiers boost the signal to a level of sufficient value for use by the deflection plates. A low voltage power supply provides +200 volts in addition to a positive and negative 15 volts while a high voltage supply utilizes a voltage multiplier circuit to furnish -1800 volts to the CRT. Whenever the RTA-2 is in an auxiliary mode and no input signal is being applied, the beam gate circuitry reduces the intensity of the trace to prevent CRT phosphor burns.

CROWN RTA-2 - Block Diagram Circuit Theory - 1

flowchart 
graph TD
    A["MASTER CLOCK 491.5 KHZ"] --> B["20 STAGE PSEUDO RANDOM BINARY GENERATOR"]
    B --> C["VAR OUT"]
    C --> D["3 dB/OCTV. PINK FILTER"]
    D --> E["40 KHz 1 dB CHEBY. LP FILTER"]
    E --> F["10 Hz 1 dB CHEBY. HP FILTER"]
    F --> G["40 dB ATTEN. SW."]
    G --> H["BALANCED PINK NOISE OUT"]

    I["○"] --> J["BALANCED INPUT MIC AMP"]
    J --> K["LINE IN"]
    K --> L["40 dB INPUT ATTEN."]
    L --> M["+1"]
    M --> N["0-20 dB AMF"]
    N --> O["VAR GAIN"]
    O --> P["3.5-13.5 dB"]
    P --> Q["BANDPASS FILTER NO.1"]
    Q --> R["AC - DC CONV. NO. 1"]
    R --> S["SPEED SW. LP FILTER NO. 1"]
    S --> T["1/3 - 1 OCTV. SW NO.1"]
    T --> U["32 INPUT MPX 1 OUT"]
    U --> V["TO LOG AMP"]

    W["LOW VOLTAGE POWER SUPPLY"] --> X["+200"]
    X --> Y["OVERLOAD INDICATOR"]
    Y --> Z["±15"]

    AA["FROM MPX"] --> AB["LOG AMP"]
    AB --> AC["AMP & BASELINE CLIPPER"]
    AC --> AD["RTA"]
    AD --> AE["VERT. GAIN"]
    AE --> AF["VERT. POS"]
    AF --> AG["VERT DEF. AMP"]
    AG --> AH["CRT"]
    AH --> AI["HOR DEFL."]
    AI --> AJ["HOR GAIN"]
    AJ --> AK["60 Hz RAMP GENERATOR"]
    AK --> AL["SWEEP OUT"]
    AL --> AM["26 dB"]

    AN["AUX 1 VERT."] --> AO["26 dB"]
    AP["AUX 2 VERT."] --> AQ["26 dB"]

    AR["AVL D"] --> AS["OVL D"]

    AT["AVL D"] --> AU["OVL D"]

    AV["AVL D"] --> AW["OVL D"]

    AX["AVL D"] --> AY["OVL D"]

    AZ["AVL D"] --> BA["OVL D"]

    BB["AVL D"] --> BC["OVL D"]

    BD["AVL D"] --> BE["OVL D"]

    BF["AVL D"] --> BG["OVL D"]

    BH["AVL D"] --> BI["OVL D"]

    BJ["AVL D"] --> BK["OVL D"]

    BL["AVL D"] --> BM["OVL D"]

    BN["AVL D"] --> BO["OVL D"]

    BP["AVL D"] --> BQ["OVL D"]

    BQ --> BR["AVL D"]

    BS["AVL D"] --> BT["OVL D"]

    BU["AVL D"] --> BV["OVL D"]

    BW["AVL D"] --> BX["OVL D"]

    BY["AVL D"] --> BZ["OVL D"]

    CA["AVL D"] --> CB["OVL D"]

    CC["AVL D"] --> CD["OVL D"]

    CE["AVL D"] --> CF["OVL D"]

    CG["AVL D"] --> CH["OVL D"]

    CI["AVL D"] --> CJ["OVL D"]

    CK["AVL D"] --> CL["OVL D"]

    CM["AVL D"] --> CN["OVL D"]

    CO["AVL D"] --> CP["OVL D"]

    CEI["AVL D"] --> CEII["OVL D"]

    CEJ["AVL D"] --> CEK["OVL D"]

    CEK --> CELI["OVL D"]

    CELE["AVL D"] --> CEM["OVL D"]

    CEM --> CEMQ["OVL D"]

    CEMQ --> CEMQ1["OVL D"]

    CEMQ1 --> CEMQ2["OVL D"]

    CEMQ2 --> CEMQ3["OVL D"]

    CEMQ3 --> CEMQ4["OVL D"]

    CEMQ4 --> CEMQ5["OVL D"]

    CEMQ5 --> CEMQ6["OVL D"]

    CEMQ6 --> CEMQ7["OVL D"]

    CEMQ7 --> CEMQ8["OVL D"]

    CEMQ8 --> CEMQ9["OVL D"]

    CEMQ9 --> CEMQ10["OVL D"]

    CEMQ10 --> CEMQ11["OVL D"]

    CEMQ11 --> CEMQ12["OVL D"]

    CEMQ12 --> CEMQ13["OVL D"]

    CEMQ13 --> CEMQ14["OVL D"]

    CEMQ14 --> CEMQ15["OVL D"]

    CEMQ15 --> CEMQ16["OVL D"]

    CEMQ16 --> CEMQ17["OVL D"]

    CEMQ17 --> CEMQ18["OVL D"]

    CEMQ18 --> CEMQ19["OVL D"]

    CEMQ19 --> CEMQ20["OVL D"]

    CEMQ20 --> CEMQ21["OVL D"]

    CEMQ21 --> CEMQ22["OVL D"]

    CEMQ22 --> CEMQ23["OVL D"]

    CEMQ23 --> CEMQ24["OVL D"]

    CEMQ24 --> CEMQ25["OVL D"]

    CEMQ25 --> CEMQ26["OVL D"]

    CEMQ26 --> CEMQ27["OVL D"]

    CEMQ27 --> CEMQ28["OVL D"]

    CEMQ28 --> CEMQ29["OVL D"]

    CEMQ29 --> CEMQ30["OVL D"]

    CEMQ30 --> CEMQ31["OVL D"]

    CEMQ31 --> CEMQ32["OVL D"]

    CEMQ32 --> CEMQ33["OVL D"]

    CEMQ33 --> CEMQ34["OVL D"]

    CEMQ34 --> CEMQ35["OVL D"]

    CEMQ35 --> CEMQ36["OVL D"]

    CEMQ36 --> CEMQ37["OVL D"]

    CEMQ37 --> CEMQ38["OVL D"]

    CEMQ38 --> CEMQ39["OVL D"]

    CEMQ39 --> CEMQ40["OVL D"]

    CEMQ40 --> CEMQ41["OVL D"]

    CEMQ41 --> CEMQ42["OVL D"]

    CEMQ42 --> CEMQ43["OVL D"]

    CEMQ43 --> CEMQ44["OVL D"]

    CEMQ44 --> CEMQ45["OVL D"]

    CEMQ45 --> CEMQ46["OVL D"]

    CEMQ46 --> CEMQ47["OVL D"]

    CEMQ47 --> CEMQ48["OVL D"]

    CEMQ48 --> CEMQ49["OVL D"]

    CEMQ49 --> CEMQ50["OVL D"]

    CEMQ50 --> CEMQ51["OVL D"]

    CEMQ51 --> CEMQ52["OVL D"]

    CEMQ52 --> CEMQ53["OVL D"]

    CEMQ53 --> CEMQ54["OVL D"]

    CEMQ54 --> CEMQ55["OVL D"]

    CEMQ55 --> CEMQ56["OVL D"]

    CEMQ56 --> CEMQ57["OVL D"]

    CEMQ57 --> CEMQ58["OVL D"]

    CEMQ58 --> CEMQ59["OVL D"]

    CEMQ59 --> CEMQ60["OVL D"]

    CEMQ60 --> CEMQ61["OVL D"]

    CEMQ61 --> CEMQ62["OVL D"]

    CEMQ62 --> CEMQ63["OVL D"]

    CEMQ63 --> CEMQ64["OVL D"]

    CEMQ64 --> CEMQ65["OVL D"]

    CEMQ65 --> CEMQ66["OVL D"]

    CEMQ66 --> CEMQ67["OVL D"]

    CEMQ67 --> CEMQ68["OVL D"]

    CEMQ68 --> CEMQ69["OVL D"]

    CEMQ69 --> CEMQ70["OVL D"]

    CEMQ70 --> CEMQ71["OVL D"]

    CEMQ71 --> CEMQ72["OVL D"]

    CEMQ72 --> CEMQ73["OVL D"]

    CEMQ73 --> CEMQ74["OVL D"]

    CEMQ74 --> CEMQ75["OVL D"]

    CEMQ75 --> CEMQ76["OVL D"]

    CEMQ76 --> CEMQ77["OVL D"]

    CEMQ77 --> CEMQ78["OVL D"]

    CEMQ78 --> CEMQ79["OVL D"]

    CEMQ79 --> CEMQ80["OVL D"]

    CEMQ80 --> CEMQ81["OVL D"]

    CEMQ81 --> CEMQ82["OVL D"]

    CEMQ82 --> CEMQ83["OVL D"]

    CEMQ83 --> CEMQ84["OVL D"]

    CEMQ84 --> CEMQ85["OVL D"]

    CEMM["VOLTAGE POWER SUPPLY"] --> AD

Fig. 4.1 Block Diagram

4.4 Detailed Circuit Theory

Balanced microphone signals entering the RTA-2 through J1 are fed to the gates of FETs C-100A and C-100B. The mic gain is adjusted with C-R135. Both sides of the balanced signal meet at buffer C-IC105D, whose non-inverting input is the arm of the common-mode-rejection trimmer pot C-R143. The now unbalanced output of C-IC105D appears at pin 14 and is applied to the next stage of amplification.

Line input jacks J2 and J3 are both pin jacks; J2 is a front panel jack, J3 a rear panel jack. Because J2 and J3 are connected in series, plugging into the front panel jack will disconnect source devices connected to the rear panel jack.

Signals injected via the line input jacks, J2 and J3, are fed through blocking capacitor C-C126 and buffer C-IC106A to the input attenuator C-SW100A. C-IC106D changes the impedance to a low value before sending the signal on to the front panel input attenuator C-R155. C-R156 together with C-IC105C and a resistor pack make up an attenuation network which provides the proper level of attenuation as per the markings on the RTA-2 front panel. Finally, the output of C-IC105C delivers the signal to the next stage which is the filter bank.

Each of the 32 filters if fed from the filter input buss (J1P7), through buffer F-IC100A. The actual filter is made up of components F-R100, F-C100, F-R101, F-R102, F-C101, F-R103, and F-IC100B. F-R102 tunes the frequency of teh filter. F-C102 couples the AC signal through filter gain control F-R104 to the precision rectifier consisting of F-IC100C and diodes F-D101, and F-D102. At the output of the DC amplifier F-IC100D, a rectified and amplified version of the filter output appears and is stored on F-C106.

When a slower response time is desired, the front panel buttons labeled fast and slow may be released. Electrically this action turns FET 100 on which inserts capacitor F-C105 in parallel with F-C106 thus adding their values and slowing the integration time of the RC network. F-IC101A dn F-IC101B are CMOS switches. When the control gates of these switches are grounded by depressing the front panel octave switch, sets of three filters combine and deliver an average voltage to the input of its associated multiplexer.

In order to get the information from the filters into the correct location on the CRT, multiplexing circuitry has been provided. The heart of the multiplexing circuitry is D-IC105 which is a dividing network. The same clock signal that is used by the pink noise generator is also used to drive D-IC105. Outputs of the counter are square wave pulse trains whose frequencies are divisions of the clock frequency (491.5KHz). As D-IC105 counts, it is essentially allowing the signals from the 32 filters to pass in sequence through F-IC132, F-IC133, F-IC134, and F-IC135 to the logarithmic amplifier.

The output signal from the multiplexer has over 60dB of possible dynamic range. Therefore, it is necessary to distribute the information across the CRT so that each filter's output will be discernable. The circuitry which improves the display dynamics of the filter output information is the logarithmic amplifier and consists of the semiconductors labeled D-Q108, D-IC102A, D-IC102B and D-IC102C. Also, surrounding components adjust linearity (D-R100), offset (D-R116) and gain (D-R108) respectively. Moving to D-IC102D, a precision limiter (base-line clamp), the signal is amplified and applied to the vertical deflection circuitry through SW100B.

Backing up a little, let's look at D-1C103C. Whenever it is desired to have the information being displayed on the RTA's screen also displayed on a second oscilloscopic instrument, the rear panel vertical output jack, (J7), is used. The vertical output signal is derived from the logarithmic amplifier, buffered by D-1C103C and applied to the vertical output jacks.

Signals injected through the horizontal and vertical input jacks are amplified and buffered by a section of D-IC103 (A or D) and applied through portions of SW100 to the vertical and horizontal deflection circuitry. D-R148 controls the vertical position of the trace, D-R149 controls the horizontal position and SW26 selects a vertical sensitivity of 5dB per division or 10dB per division. These adjustments all appear on the front panel.

D-IC104B and D-IC104C along with their associated componentry, make up a detector circuit whose function is to reduce the trace intensity during the absence of a vertical input signal. The reason for this circuitry is to eliminate the possibilities of burning holes in the CRT's phosphor coating.

D-IC104A and D-IC104D form a voltage comparator circuit. This circuit is set up so that anytime a voltage enters the RTA-2 that is greater than the voltage set at the input of the comparator, D-Q107 will be biased into operation thereby illuminating the front panel overload indicator LED-2. The low voltage power supplies provide the proper operating voltages to the RTA-2 circuitry and light the power-on indicator. The low voltage power supply furnishes plus and minus 15 volts as well as plus 200 volts while the high voltage supply uses several capacitors and diodes in a voltage multiplier configuration to supply -1800 volts to the anodes of the CRT.

ENERAL

CIRCUITS SHOWN START WITH SN20558

ALL COMPONENTS MOUNTED OFF BOARDS ARE NUM-

BERED 1-9 PER BOARD

ALL COMPONENTS ARE NUMBERED 100-199 PER BOARD

EACH BOARD HAS A CODE LETTER. THEY ARE LISTED

BELC

  1. LOW VOLTAGE POWER SUPPLY BOARD #9770

3 - ULTRA HIGH VOLTAGE

C - INPUT BOARD #9780

0 - DEFLECTION BOARD #6788

- LOW FILTER BOARD =6786

- HI FILTER BOARD 4678

ALL RESISTORS ARE IN OHME, CAPACITOR

FARADS UNLESS OTHERWISE DESIGNATED

Electrical schematic diagram with labeled components including transformers, capacitors, diodes, and resistors

POWER SUPPLY

  • CIRCUIT SHOWN WIRED FOR 120 YAC
  • EWI SHOWN IN OFF POSITION
  • EN DENOTES REGISTOR NETWORK
  • AN DELETES RESISTOR NETWORK A DEMOTER CHASSIC HEATRINKED
  • Y DENOTES CATHODE LEAD TO LED 2. OVLD INDICATOR

Fig. 4.2 RTA-2 Schematics Diagrams
Technical schematic diagram of a mechanical or electrical component with labeled parts and connections

INPUT BOARD STNG M1 299 C100 C101 C102 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C120 C121 C122 C123 C124 C125 C126 C127 C128 C129 C130 C131 C132 C133 C134 C135 C136 C137 C138 C139 C140 C141 C142 C143 C144 C145 C146 C147 C148 C149 C150 C151 C152 C153 C154 C155 C156 C157 C158 C159 C160 C161 C162 C163 C164 C165 C166 C167 C168 C169 C170 C171 C172 C173 C174 C175 C176 C177 C178 C179 C180 C181 C182 C183 C184 C185 C186 C187 C188 C189 C190 C191 C192 C193 C194 C195 C196 C197 C198 C199 PAN NOISE OUT 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A 4A, PAIN MODE OUT PAN MODE OUT PAN MODE OUT

NOTE: R129 (180K) should be R132 (180K) R133 (5.3K) should be R150 (5.3K) CROWN 9780

USE PRESENT NEAR AND ON THIS 9-72 -crown -1800 NOTE: Q35 should be Q36.

DEFLECTION BOARD

- J1-P CONNECTIONS GO TO THEIR RESPECTIVE CON

- SCORE SW100 SHOWN IN RTA POSITION

M1 301 OUTPUT RACOS VREF INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ OUT INJ 2000Ω 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5S INJ 2000Ω 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5S INJ 400Ω 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5S INJ 600Ω 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5S INJ 800Ω 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5S INJ 1000Ω 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5S INJ 1200Ω 1.5V 1.5V 1.5V 1.5V 1.5V 1.5V 1.5S INJ 1400Ω 1.5V 1.5V 1.5V 1.5V 1.5V 1.5S INJ 1600Ω 1.5V 1.5V 1.5V 1.5V 1.5S INJ 2800Ω 1.5V 1.5V 1.5V 1.5S INJ 3000Ω 1.5V 1.5S INJ 3200Ω 1.5S INJ 3400Ω 1.5S INJ 3600Ω 1.5S INJ 3800Ω 1.5S INJ 4000Ω 1.5S INJ 4200Ω 1.5S INJ 4400Ω 1.5S INJ 4600Ω 1.5S INJ 4800Ω 1.5S INJ 5000Ω 1.5S INJ 5200Ω 1.5S INJ 5400Ω 1.5S INJ 5600Ω 1.5S INJ 5800Ω 1.5S INJ 6000Ω 1.5S INJ 6200Ω 1.5S INJ 6400Ω 1.5S INJ 6600Ω 1.5S INJ 6800Ω 1.5S INJ 7000Ω 1.5S INJ 7200Ω 1.5S INJ 7400Ω 1.5S INJ 7600Ω 1.5S INJ 7800Ω 1.5S INJ 8000Ω 1.5S INJ 8200Ω 1.5S INJ 8400Ω 1.5S INJ 8600Ω 1.5S INJ 8800Ω 1.5S INJ 9000Ω 1.5S INJ 9200Ω 1.5S INJ 9400Ω 1.5S INJ 9600Ω 1.5S INJ 9800Ω 1.5S INJ AUSTA BUSTA CUSTA DUSTA EUSTA FUSTA GUSTA HUSTA IUSTA JUSTA KUSTA LUSTA MUSTA NUSTA OUSTA PUSTA QUSTA RUSTA SUSTA TUSTA UUSTA VUSTA WUSTA XUSTA YUSTA ZUSTA UUSTA VUSTA WUSTA XUSTA YUSTA ZUSTA UUSTA UUSTA VUSTA WUSTA XUSTA YUSTA ZUSTA UUSTA UUSTA VUSTA WUSTA XUSTA YUSTA ZUSTA UUSTA UUSTA VUSTA WUSTA XUSTA YUSTA ZUSTA UUSTA UUSTA VUSTA WUSTA XUSTA YUSTA ZUSTA UUSTA UUSTA VUSTA WUSTA XUSTA YUST AUST AUST BUST BUST CUST AUST DUST AUST EUST AUST FUST AUST GUST AUST HUST AUST IUST AUST JUST AUST KUST AUST LUST AUST MUST AUST NUST AUST OUST AUST PUST AUST QUST AUST RUST AUST SUST AUST TUST AUST UUST AUST VUST AUST WUST AUST XUST AUST YUST AUST ZUST AUST UUST AUST WUST AUST XUST AUST YUST AUST ZUST AUST UUST AUST WUST AUST XUST AUST YUST AUST ZUST AUST UUST AUST WUST AUST XUST AUST YUST AUST ZUST AUST UUST AUST WUST AUST XUST AUST YUST AUST AUST BUST BUST CUST CUST DUST DUST DUST EUST DUST EUST FUST DUST EUST GUST DUST EUST HUST DUST EUST IUST DUST EUST KUST EUST KUST EUST LUST EUST MUS TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TUG TCGT UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UCTUUT UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST U STUUT UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST UST U STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTU STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUT I STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUTI STUUT! INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INr INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INR INF OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USC USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USc USd US c usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usc usd AS u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u c u f out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Out Unf Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj Inj In jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIn jIns in the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of the output of -in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, and in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in, in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,in ,out

CROWN 4788 INJECTION: K040 NOTE: R124 (47K) should be R125 (47K). C112 and C114 are transposed. A

VCL12 BLU2 J17-6 D100 RIN100A 3.74K IC500 1.1K RN100C 73K CN100 917pF IC100 2.8 CX2 47/35 R100 IE Car FREQUENCY ADJ. R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 R100 C103 .01 IC300 14 IC302 12 IC303 11 IC304 .01 IC305 13 IC306 12 IC307 11 IC308 12 IC309 13 IC310 14 C104 .02 IC311 15 C105 .1M IC312 16 C106 .47 IC313 17 C107 .47M IC318 18 C108 .47M IC319 19 C109 .47M IC320 20 C110 .47M IC321 21 C111 .47M IC322 22 C112 .47M IC323 23 C113 .47M IC324 24 C114 .47M IC325 25 C115 .47M IC326 26 C116 .47M IC327 27 C117 .47M IC328 28 C118 .47M IC329 29 C119 .47M IC330 30 C120 .47M IC331 31 C121 .47M IC332 32 C122 .47M IC333 33 C123 .47M IC334 34 C124 .47M IC335 35 C125 .47M IC336 36 C126 .47M IC337 37 C127 .47M IC338 38 C128 .47M IC339 39 C129 .47M IC340 40 C130A B 47/35 C130B B 47/35 C130C B 47/35 C130D B 47/35 C130E B 47/35 C130F B 47/35 C130G B 47/35 C130H B 47/35 C130I B 47/35 C130J B 47/35 C130K B 47/35 C130L B 47/35 C130M B 47/35 C130N B 47/35 C130O B 47/35 C130P B 47/35 C130Q B 47/35 C130R B 47/35 C130S B 47/35 C130T B 47/35 C130U B 47/35 C130V B 47/35 C130W B 47/35 C130X B 47/35 C130Y B 47/35 C130Z B 47/35 C130A B 47/35 C130B B 47/35 C130C B 47/35 C130D B 47/35 C130E B 47/35 C130F B 47/35 C130G B 47/35 C130H B 29/66Hz and above (650 Hz and below shown) C130I B 29/66Hz and above (650 Hz and below shown) FILTER BOARDS: FILTER 32 IS SHOWN. ALL FILTERS ARE IDENTICAL, WITH THE EXCEPTION OF "C109 and "C101 - WHOSE VALUE DEPEND ON FREQUENCY OF THE FILTER" MULTIPLEXERS FOR 32 FILTERS ARE SHOWN. PIN INPUTS FOR EACH FILTER ARE GIVEN IN CHART AT RIGHT. "RN10A,B,C SELECTED FOR EACH OF 32 FILTERS AS PER CHART AT RIGHT. THE SPEED SWITCH AND OCTAVE SWITCH ARE BUSSED THROUGH R165 and R166 ON THE DEFLECTION BOARD. SWI IS A SPEED SWITCH FOR THE BAND FROM 899Hz: 20KHz (FILTERS 18 THRU 32). SWI (NOT SHOWN) IS THE SPEED SWITCH FOR THE BAND 16Hz-599Hz (FILTERS 1 THRU 17) FILTERS 3-32 ARE OCTAVE-BUSSED WITH 3 FILTERS PER OCTAVE. RC COMPONENTS C114 AND R126 ARE USED IN FILTERS 31, 26, 25, 22, 19, 18, 15, 12, 9, 8, 6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, CPN-4716: CPN-4715: CPN-4716: CPN-4717: CPN-4718: CPN-4719: CPN-4720: CPN-4721: CPN-4722: CPN-4723: CPN-4724: CPN-4725: CPN-4726: CPN-4727: CPN-4728: CPN-4729: CPN-4730: CPN-4731: CPN-4732: CPN-4733: CPN-4734: CPN-4735: CPN-4736: CPN-4737: CPN-4738: CPN-4739: CPN-4740: CPN-4741: CPN-4742: CPN-4743: CPN-4744: CPN-4745: CPN-4746: CPN-4747: CPN-4748: CPN-4749: CPN-4750: CPN-4751: CPN-4752: CPN-4753: CPN-4754: CPN-4755: CPN-4756: CPN-4757: CPN-4758: CPN-4759: CPN-4760: CPN-4761: CPN-4762: CPN-4763: CPN-4764: CPN-4765: CPN-4766: CPN-4767: CPN-4768: CPN-4769: CPN-4770: CPN-4771: CPN-4772: CPN-4773: CPN-4774: CPN-4775: CPN-4776: CPN-4777: CPN-4778: CPN-4779: CPN-4780:E I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I O I N C PCN

Filter #14 Filter #15 Filter #16 Low Frequency Filter Board 4788 e- uWOW d874 Filter #2 Filter #3 Filter #4 Filter #5 Filter #6 Filter #7 Filter #8 Filter #9 Filter #10 Filter #11 Filter #12 Filter #13 Filter #14 Filter #15 Filter #16 e o1 e1 e2 e3 e4 e5 e6 e7 e8 e9 f0 f1 f2 f3 f4 f5 f6 f7 f8 f9 g0 g1 g2 g3 g4 g5 g6 g7 g8 g9 h0

Filter #10 Filter #32 Filter #17 Filter #18 Filter #19 4-12 Filter #30 Filter #31 Filter #32 Filter #17 High Frequency Filter Board 4767 8f 55 53 54 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Power A10 200V (2.0V) Power A20 200V (2.0V) Power A30 200V (2.0V) Power A40 200V (2.0V) Power A50 200V (2.0V) Power A60 200V (2.0V) Power A70 200V (2.0V) Power A80 200V (2.0V) Power A90 200V (2.0V) Power A100 200V (2.0V) Power A110 200V (2.0V) Power A120 200V (2.0V) Power A130 200V (2.0V) Power A140 200V (2.0V) Power A150 200V (2.0V) Power A160 200V (2.0V) Power A170 200V (2.0V) Power A180 200V (2.0V) Power A190 200V (2.0V) Power A200 200V (2.0V) Power A210 200V (2.0V) Power A220 200V (2.0V) Power A230 200V (2.0V) Power A240 200V (2.0V) Power A250 200V (2.0V) Power A260 200V (2.0V) Power A270 200V (2.0V) Power A280 200V (2.0V) Power A290 200V (2.0V) Power A300 200V (2.0V) Power A310 200V (2.0V) Power A320 200V (2.0V) Power A330 200V (2.0V) Power A340 200V (2.0V) Power A350 200V (2.0V) Power A360 200V (2.0V) Power A370 200V (2.0V) Power A380 200V (2.0V) Power A390 200V (2.0V) Power A400 200V (2.0V) Power A410 200V (2.0V) Power A420 200V (2.0V) Power A430 200V (2.0V) Power A440 200V (2.0V) Power A450 200V (2.0V) Power A460 200V (2.0V) Power A470 200V (2.0V) Power A480 200V (2.0V) Power A490 200V (2.0V) Power A511 255A (55A) (55A) Power A513 255B (55B) (55B) Power A515 255C (55C) (55C) Power A517 255D (55D) (55D) Power A519 255E (55E) (55E) Power A521 255F (55F) (55F) Power A523 255G (55G) (55G) Power A525 255H (55H) (55H) Power A527 255I (55I) (55I) Power A531 388A (388A) (388A) Power A533 388B (388B) (388B) Power A535 388C (388C) (388C) Power A537 388D (388D) (388D) Power A539 388E (388E) (388E) Power A541 388F (388F) (388F) Power A543 388G (388G) (388G) Power A545 388H (388H) (388H) Power A547 388I (388I) (388I) Power A549 388J (388J) (388J) Power A551 388K (388K) (388K) Power A553 388L (388L) (388L) Power A555 388M (388M) (388M) Power A557 388N (388N) (388N) Power A561 469A (469A) (469A) Power A563 469B (469B) (469B) Power A565 469C (469C) (469C) Power A567 469D (469D) (469D) Power A569 469E (469E) (469E) Power A571 469F (469F) (469F) Power A573 469G (469G) (469G) Power A575 469H (469H) (469H) Power A577 469I (469I) (469I) Power A579 469J (469J) (469J) Power A581 469K (469K) (469K) Power A583 469L (469L) (469L) Power A585 469M (469M) (469M) Power A587 469N (469N) (469N) Power A589 469O (469O) (469O) Power A591 469P(469P) (469P) (469P) Power A593 469Q(469Q) (469Q) (469Q) Power A595 469R(469R) (469R) (469R) Power A597 469S(469S) (469S) (469S) Power A599 469T(469T) (469T) (469T) Power A611 477A(77A) (77A) (77A) Power A613 477B(77B) (77B) (77B) Power A615 477C(77C) (77C) (77C) Power A617 477D(77D) (77D) (77D) Power A619 477E(77E) (77E) (77E) Power A621 477F(77F) (77F) (77F) Power A623 477G(77G) (77G) (77G) Power A625 477H(77H) (77H) (77H) Power A627 477I(77I) (77I) (77I) Power A631 477J(77J) (77J) (77J) Power A633 477K(77K) (77K) (77K) Power A635 477L(77L) (77L) (77L) Power A637 477M(77M) (77M) (77M) Power A639 477N(77N) (77N) (77N) Power A641 478A(78A) (78A) (78A) Power A643 478B(78B) (78B) (78B) Power A645 478C(78C) (78C) (78C) Power A647 478D(78D) (78D) (78D) Power A649 478E(78E) (78E) (78E) Power A651 478F(78F) (78F) (78F) Power A653 478G(78G) (78G) (78G) Power A655 478H(78H) (78H) (78H) Power A657 478I(78I) (78I) (78I) Power A659 478J(78J) (78J) (78J) Power A661 478K(78K) (78K) (78K) Power A663 478L(78L) (78L) (78L) Power A665 478M(78M) (78M) (78M) Power A667 478N(78N) (78N) (78N) Power A669 478O( ) High Frequency Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter Board Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11 Filter #11

SECTION 5 PARTS LIST

5.1 General Information

This section contains parts lists for the RTA-2 real time analyzer. The information in this section will aid the service technician in rapidly and accurately identifying and replacing defective parts.

Reference designations correspond to those shown in the schematic diagrams in Sec. 4.

5.2 Standard and Special Parts

Many electrical and electronic parts and many attaching type parts used in the RTA-2 are standard items stocked by and available from electronic supply houses. However, some electronic parts that appear to be standard are actually special. This means that Crown has selected the item to meet specific requirements. A part ordered by the Crown part number will assure an acceptable replacement. Structural items such as covers and panels are available only from Crown.

5.3 Ordering Parts

When ordering parts for the RTA-2, be sure to give the model and serial number and include the part description and Crown part number from the parts list.

Note: All component designation numbers are preceded by board code letter -

Schematic DesignationDescriptionQty.Crown Part No.Other Information
RTA-2 High Low Voltage Module41989
Resistors
A-R10015K ohm 1⁄2W 5% CF11064
A-R101300 ohm 1⁄4W 5% CF13801
A-R10210 ohm 1⁄4W 5% CF13753
A-R1031K ohm 1⁄4W 5% CF12627
A-R104220K ohm 1⁄4W 5% CF14219
A-R10510K ohm 1⁄4W 5% CF12631
A-R1064.99K ohm 1⁄4W 1% MF13686
A-R107200K ohm 1⁄2W 5% MF13197
A-R10810K ohm 1⁄2W 1% MF12343
A-R109, R1101.3K ohm 1⁄2W 1% MF23114
A-R111470 ohm 1⁄4W 5% CF12626
A-RN100, RN101Resistor trim network24445
Capacitors
A-C10040mF 450V14848
A-C101.001mF Cer Disc12288
A-C102, C103
C106, C1071000mF 40V44303
A-C104, C1054.7mF 63V24253
Diodes
A-D100, D101, D102, D103, D104, D105, D106, D1071N400482851
Integrated Circuits
A-IC10079MGT2C1C 5486-3 -Reg
A-IC10178MGT2C1C 4296-7 +Reg
TransistorsC 5487-1
A-Q100, Q102PN4250A PNP23786
A-Q101NDS128 NPN1C 4061-5
A-Q103MPSA93 PNP13578
Miscellaneous
Power supply heat sink19756
APower Supply Board19770*Not available for purchase
Int star lockwasher #441824
4-4OX .25 RHS screw41827
4-40 hex nut41938
7 cable tie31812
312 X 125 X 031 nylon washer44567

crown

Schematic DesignationDescriptionQty.Crown Part No.Other Information
Ultra High Voltage Module41988
Resistors
B-R100, R10347K ohm 1W 5% Comp24866
B-R101, R10210K ohm 1⁄4W 5% CF22631
B-R10451K ohm 1⁄4W 5%12881
B-R1055M ohm POT14779Focus control
B-R106, R1077.5M ohm 1W 5% Comp248747323-6
B-R1081M ohm 1⁄4W 5%13198
B-R1093.3M ohm 1⁄4W 5% CF14237
B-R110250K POT14778Astig control
Capacitors
B-C100, C101.001mF Cer Disc22288
B-C102, C103, C104, C105, C106, C107, C108, C109, C110, C111.02mF 500V Cer Disc104847
B-C112, C117.0047mF 3kV Cer Disc24845
B-C113, C114.01mF 1kV Cer Disc24846
B-C115, C118.1mF 200V Filmatic12938
B-C1164.7mF 63V Vertical14253
Diodes
B-D100, D1011N414823181
B-D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112, D113, D114, D1151N4005154842
Integrated Circuits
B-IC-14060 Hex inverter14665
Transistors
B-Q100, Q101, Q102, Q103NDS128 NPN44061
Miscellaneous
BRTA ultra hi voltage brd.19772*Not available for purchase
14 Pin DIL IC socket13450
RTA-2 Input Module41987
Resistors
C-R100, R130, R-1371M ohm 1⁄4W 5% CF33198
C-R1013.9K ohm 1⁄4W 5% CF12630
C-R1022K ohm heli-pot trim13672Noise
C-R10325K ohm audio14770Pink noise level
C-R104150 ohm 1⁄4W 5% CF13799
C-R1054.22K ohm 1⁄2W 1% MF14854
C-R1068.45K ohm 1⁄2W 1% MF14857
C-R10716.9K ohm 1⁄2W 1% MF14860
C-R10834K ohm 1⁄2W 1% MF14864
C-R10968.1K ohm 1⁄2W 1% MF14916
C-R110137K ohm 1⁄2W 1% MF14869
C-R111274K ohm 1⁄2W 1% MF14871
C-R112330K ohm 1⁄4W 5% CF14222
C-R113, R1154.2K ohm 1⁄4W 5% CF24855
C-R11436K ohm 1⁄4W 5% CF14865
C-R11612K ohm 1⁄4W 5% CF12878
C-R117160K ohm 1⁄4W 5% CF14217
C-R1183.3K ohm 1⁄4W 5% CF12629
C-R119, R124300 ohm 1⁄4W 5% CF23801
C-R120, R123, R148, R14910K ohm 1⁄4W 5% CF42631
C-R121, R1252.21K ohm 1⁄2W 1% MF24906
C-R122, R12625.5 ohm 1⁄2W 1% MF24905
C-R127Selected1
C-R128, R1291K ohm 1⁄2W 1% MF23194
C-R13120K ohm 1⁄2W 1% MF13752
C-R132, R-13410M ohm 1⁄4W 10% Comp23221
C-R1355K ohm Helipot trim13670CCW log
C-R136180 ohm 1⁄4W 5% CF12873
C-R139, R1402K ohm 1⁄4W 1% MF24505
C-R141, R147, R13310K ohm 1⁄4W 1% MF34859
C-R142, R1449.9K ohm 1⁄4W 1% MF24858
C-R143200 ohm Helipot trim13683
C-R145, R1501K ohm 1⁄2W 1% MF24850
C-R146,1M ohm 1⁄2W 1% MF14872
C-R152, R13820K 1⁄4W 1% MF24861
C-R153200K ohm 1⁄4W 5% CF13622
C-R1541.1K ohm 1⁄4W 1% MF14851
C-R15525K ohm Audio14779
C-R15613K ohm 1⁄4W 5% CF14300
C-RN100Resistor network14280
C-R157100 ohm 1⁄4W 5% CF12872
C-R1512K 1⁄4W 5% CF13804
Capacitors
C-C100.1mF 12V Cer Disc12600
C-C101470pF Mica12511
C-C10233mF 50V13679
C-C103.015mF 200V Filmatic13288
C-C104200pF Mica13411
C-C105, C106917pF 63V 2.5 Styr24287
C-C1071830pF 63V 2.5 Styr14286
C-C1083660pF 63V 2.5 Styr14285
C-C1097330pF 63V 2.5 Styr14284
C-C11014,700pF 63V 2.5 Styr14283
C-C111.0293mF 200V 2.514293
C-C112.058mF 100V 2.514292
C-C113.001mF 200V Filmatic13480
C-C114.0012mF12406
C-C11547pF Mica13409
C-C116, C117, C1181.0mF 100V 5 polycrb34472
C-C119, C123.47mF 100V 5 Polycrb24119
C-C120, C124.22mF 100V 5 Polycrb24510
C-C121, C12510pF Mica22821
C-C122220mF 16V Vertical13796
C-C126.047mF 250V 5 Polycrb14404
C-C127400mF 16V Vertical13729
C-C128, C129, C1304.7mF 63V Vertical34253
Diodes
C-D100, D1031N961B 10V Zener23549
C-D101, D102, D104, D105, D1061N414853181
Integrated Circuits
C-IC100MC1407014833
C-IC101, C103MC14013 Flip Flop24831
C-IC1024011 Quad Two Input Nand14529
C-IC104, IC105, IC106TL07434696
C-IC107MC14006 Div-By-N-Ctr14832
Transistors
C-FET100E4111 Dual N-Ch JFET14015
Miscellaneous
CRTA Input Board19780*Not available for purchase
SW100DPDT DB SW W/O Brckt14923
Xistor Lead PC Recpt23519
14 Pin D/C IC Socket83450
Deflection Module41986
Resistors
D-R100100K ohm Cermet Trim14843
D-R101, R135, R136, R140, R165, R166, R167100K ohm 1⁄4W 5% CF72883
D-R102100 ohm 1⁄4W 5% CF12872
D-R103, R112, R118, R16110K ohm 1⁄4W 1% MF44859
D-R10468K ohm 1⁄4W 5% CF13620
D-R10510 ohm 1⁄4W 5% CF13753
D-R106150K ohm 1⁄4W 1% MF14870
D-R1072.2K ohm 1⁄4W 2% MF13152
D-R1082K ohm Helipot Trim13672
D-R109, R13115K ohm 1⁄4W 5% CF22632
D-R1101K ohm 3W Q-8114876
D-R1114.99K ohm 1⁄4W 1% MF13686
D-R1133K ohm 1⁄4W 1% MF14853
D-R11436K ohm 1⁄4W 5% CF14865
D-R11522.6K ohm 1⁄4W 1% MF14146
D-R1165K ohm Helipot Trim13670
D-R117, R16230.1K ohm 1⁄4W 1% MF24862
D-R119, R163510 ohm 1⁄4W 5% CF24849
D-R120, R1641K ohm 1⁄4W 5% CF22627
D-R121, R133560 ohm 1⁄4W 5% CF22874
D-R1223M ohm 1⁄4W 5% CF14489
D-R123, R128, D-12947K ohm 1⁄4W 5% CF32880
D-R12418K ohm 1⁄4W 5% CF12633
D-R1253.9K ohm 1⁄4W 5% CF12630
D-R1262.4M ohm 1⁄4W 5% CF14600
D-R127, R130, R134, R168, R15110K ohm 1⁄4W 5% CF52631
D-R1325.1M ohm 1⁄2W 1% MF15035
D-R137, R13810M ohm 1⁄4W 10% Comp23221
D-R1395.1M ohm 1⁄4W 5% CF14126
D-R1414.7K ohm 1⁄4W 5% CF13939
D-R142, R1505K ohm Vrt+Hrz RTA24773
D-R143, R15712K ohm 1⁄4W 5% CF22878
D-R144, R145, R146, R14747K ohm 1W 5% Comp44866

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Schematic DesignationDescriptionQty.Crown Part No.Other Information
D-R14825K ohm Vert Pos RTA14774
D-R14925K ohm Horz Pos RTA14775
D-R152, R1531.8K ohm 1⁄4W 5% CF23807
D-R1544.87K ohm 1% MF14856
D-R155, R1562.49K ohm 1⁄4W 1%24852
D-R158, R160470 ohm 1⁄4W 5% CF22626
D-R1592K ohm 1⁄4W 1% MF14505
Capacitors
D-C100100pf Mica13410
D-C101, C10227pf Mica22342
D-C103470pf Mica12511
D-C104.01mF Cer Disc11751
D-C105.047mF 250V 5 Polycarb14404
D-C106, C108.47MFD 100V 5 Polycrb24119
D-C107.1MFD 200 V Filmatic12938
D-C109.544pF 63V 25 Styr14463
D-C110, C112.001MFD Cer Disc22288
D-C111200pF Mica13411
D-C113.0047mF 200V 5 Poly13996
D-C114.001mF 200V Filmatic13480
Diodes
D-D100, D101, D102, D103 D104, D105, D1061N414873181
Integrated Circuits
D-IC1004011 Quad 2 Input Nand14529
D-IC1014001 Quad 2 Input Nor14528
D-IC102, IC103TE07424696
D-IC104LM339N Volt Comparatr14345
D-IC1054020 Shift Register14829
D-IC1064078 8 Input Nor Gate14830
Transistors
D-Q100, Q107PN4250A PNP23786
D-Q101, Q102, Q103, Q104ND 128 NPN44061
D-Q105, Q106Sel 2N3859A NPN22961
D-FET 1002N5459 N-Ch JFET13053
D-Q108Sel 1T129 NPN14838
Miscellaneous
DRTA-2 Deflection Board14788*Not available for purchase
14 Pin Dil IC Socket63450
16 Pin Dil IC Socket34508
PC Mount Post Mod 124729
1P 3 Pos Scope 1NP SW14772
General Miscellaneous
Back Panel Assembly
J2N112A 2 Could. HI-D Jack13631Line in
J4350 1FP Panel Pin Jack11533Pinkout
J7350 1FP Panel Pin Jack11533Vert out
J8350 1FP Panel Pin Jack11533Sweep out
J9350 1FP Panel Pin Jack11533Aux 1 Vert In
J10350 1FP Panel Pin Jack11533Aux 1 Horz In
J11350 1FP Panel Pin Jack11533Aux 2 Vert In
J12350 1FP Panel Pin Jack11533Aux 2 Horz In
R933K ohm Pot VA263213307Aux 1 Vert Adj
R733K ohm Pot VA263213307Aux 1 Horz Adj
R833K ohm Pot VA263213307Aux 2 Vert Adj
R633K ohm VA263213307Aux 2 Horz Adj
CRT 14 Pin Socket14839
3823-1 Fuse Block13776
E13A6 1A Slow Blow14875
T111939 RTA XFMR14762
CRT 15 DEP-31F CRT14757
Front Panel Assembly
J1jXLR3-32 Panel M Cannon11525Pink noise, Balanced out
J6XLR3-31 Panel F Cannon14902Mic Input
J3, J5N112A 2 Cond. Hi-D Jack23631Mic line inputPink noise output
R5250K ohm Astig14778Astigmatism control
R225K ohm Audio HKX45014771Intensity control
R150 ohm AW4514776Illum control
SW11 Pos Rotary Prw Sw13492Power on/off
Led 1Amber LED MV515314342Power on light
LED 2Red LED MV505314341Overload indicator
SW2 a,b,c,d4 St-Pushbutton Sw14765a) Octaveb) 10dB/SDBC) Hi Fast/Slowd) Lo Fast/Slow
Q1MPSA4313810

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Schematic DesignationDescriptionCrown Qty. Part No.Other Information
Low Filter #1
Resistors
E-RN162Resistor Network14713
E-RN163Resistor Network14712
E-R3891K ohm Helipot Trim13669Frequency Adjust
E-R3905K ohm Helipot Trim13670Filter Gain Adjust
E-R391, R3921M ohm 1⁄4W 5% CF23198
E-R393, R3941.5M ohm 1⁄4W 5% CF24234
E-R39510K ohm 1⁄2W 5% CF12631
E-R3967.5M ohm 1⁄4W 5% CF14915
E-R3971M ohm Horz Trimpot14844
Capacitors
E-C328, C329.94mF 200V24288
E-C330, C3344.7mF 35V24019
E-C331, C332.01mF21751
E-C33333mF 50V Vertical13679
Diodes
E-D193, D194, D1951N414833181
Integrated Circuits
E-IC131TL07414696
E-IC141MC14016 Quad Switch3/brdC4834~5
E-IC135MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1312N5459 N-Ch FET13053
Low Filter #2
Resistors
E-RN160Resistor Network14714
E-RN161Resistor Network14712
E-R3801K ohm Helipot Trim13669Frequency Adjust
E-R3815K ohm Helipot Trim13670Filter Gain Adjust
E-R382, R3831M ohm 1⁄4W 5% CF23198
E-R384, R3851.5M ohm 1⁄4W 5% CF24234
E-R38610K ohm 1⁄2W 5% CF12631
E-R3877.5M ohm 1⁄4W 5% CF14915
E-R3881M ohm Horz Trimpot14844
Schematic DesignationDescriptionCrown
Qty.Part No.Other Information
Capacitors
E-C321, C322.94mF 200V24288
E-C323, C3274.7mF 35V24019
E-C324, C325.01mF21751
E-C32633mF 50V Vertical13679
Diodes
E-D190, D191
D1921N414833181
Integrated Circuits
E-IC130TL07414696
E-IC141MC14016 Quad Switch3/brd4834
E-IC135MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1302N5459 N-Ch FET13053
Low Filter #3
Resistors
E-RN158Resistor Network14715
E-RN159Resistor Network14712
E-R3711K ohm Helipot Trim13669Frequency Adjust
E-R3725K ohm Helipot Trim13670Filter Gain Adjust
E-R373, R3741M ohm 1⁄4W 5% CF23198
E-R375, R3761.5M ohm 1⁄4W 5% CF24234
E-R37710K ohm 1⁄2W 5% CF12631
E-R3787.5M ohm 1⁄4W 5% CF14915
E-R3791M ohm Horz Trimpot14844
Capacitors
E-C314, C315.47mF 200V24289
E-C316, C3204.7mF 35V24019
E-C317, C318.01mF21751
E-C31933mF 50V Vertical13679
Diodes
E-D187, D188,
D1891N414833181
Integrated Circuits
E-IC129TL07414696
E-IC141MC14016 Quad Switch3/brd4834
E-IC135MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1292N5459 N-Ch FET13053
Schematic DesignationDescriptionCrown Qty. Part No.Other Information
Low Filter #4
Resistors
E-RN156Resistor Network14713
E-RN157Resistor Network14712
E-R3611K ohm Helipot Trim13669Frequency Adjust
E-R3625K ohm Helipot Trim13670Filter Gain Adjust
E-R363, R3641M ohm 1⁄4W 5% CF23198
E-R365, R3661.5M ohm 1⁄4W 5% CF24234
E-R36710K ohm 1⁄2W 5% CF12631
E-R3687.5M ohm 1⁄4W 5% CF14915
E-R3691M ohm Horz Trimpot14844
E-R3705.6K ohm 1⁄4W 5% CF13220
Capacitors
E-C306, C307.47mF 200V24289
E-C308, C312, E-C3134.7mF 35V24019
E-C309, C310.01mF21751
E-C31133mF 50V Vertical13679
Diodes
E-D184, D185, D1861N414833181
Integrated Circuits
E-IC128TL07414696
E-IC141MC14016 Quad Switch3/brd4834-S
E-IC135MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1282N5459 N-Ch FET13053
Low Filter #5
Resistors
E-RN154Resistor Network14714
E-RN155Resistor Network14712
E-R3521K ohm Helipot Trim13669Frequency Adjust
E-R3535K ohm Helipot Trim13670Filter Gain Adjust
E-R354, R3551M ohm 1⁄4W 5% CF23198
E-R356, R3571.5M ohm 1⁄4W 5% CF24234
E-R35810K ohm 1⁄2W 5% CF12631
E-R3597.5M ohm 1⁄4W 5% CF14915
E-R3601M ohm Horz Trimpot14844
Schematic DesignationDescriptionQty.Crown Part No.Other Information
Capacitors
E-C299, C300.47mF 200V24289
E-C301, C3054.7mF 35V24019
E-C302, C303.01mF21751
E-C30433mF 50V Vertical13679
Diodes
E-D181, D182, D1831N414833181
Integrated Circuits
E-IC127TL07414696
E-IC141MC14016 Quad Switch3/brd4834
E-IC135MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1272N5459 N-Ch FET13053
Low Filter #6
Resistors
E-RN152Resistor Network14715
E-RN153Resistor Network14712
E-R3431K ohm Helipot Trim13669Frequency Adjust
E-R3445K ohm Helipot Trim13670Filter Gain Adjust
E-R345, R3461M ohm 1⁄4W 5% CF23198
E-R347, R3481.5M ohm 1⁄4W 5% CF24234
E-R34910K ohm 1⁄2W 5% CF12631
E-R3507.5M ohm 1⁄4W 5% CF14915
E-R3511M ohm Horz Trimpot14844
Capacitors
E-C292, C293.234mF 200V24290
E-C294, C2984.7mF 35V24019
E-C295, C296.01mF21751
E-C29733mF 50V Vertical13679
Diodes
E-D178, D179, D1801N414833181
Integrated Circuits
E-IC126TL07414696
E-IC140MC14016 Quad Switch3/brd4834
E-IC135MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1262N5459 N-Ch FET13053

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Schematic DesignationDescriptionQty.Crown Part No.Other Information
Low Filter #7
Resistors
E-RN150Resistor Network14713
E-RN151Resistor Network14712
E-R3331K ohm Helipot Trim13669Frequency Adjust
E-R3345K ohm Helipot Trim13670Filter Gain Adjust
E-R335, R3361M ohm 1⁄4W 5% CF23198
E-R337, R3381.5M ohm 1⁄4W 5% CF24234
E-R33910K ohm 1⁄2W 5% CF12631
E-R3407.5M ohm 1⁄4W 5% CF14915
E-R3411M ohm Horz Trimpot14844
E-R3425.6K ohm 1⁄4W 5% CF13220
Capacitors
E-C284, C285.234mF 200V24290
E-C286, C290
C2914.7mF 35V34019
E-C287, C288.01mF21751
E-C28933mF 50V Vertical13679
Diodes
E-D175 D176, D1771N414833181
Integrated Circuits
E-IC125TL07414696
E-IC140MC14016 Quad Switch3/brd4834
E-IC135MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1252N5459 N-Ch FET13053
Low Filter Board #8
Resistors
E-RN148Resistor Network14714
E-RN149Resistor Network14712
E-R3241K ohm Helipot Trim13669Frequency Adjust
E-R3255K ohm Helipot Trim13670Filter Gain Adjust
E-R326, R3271M ohm 1⁄4W 5% CF23198
E-R328, R3291.5M ohm 1⁄4W 5% CF24234
E-R33010K ohm 1⁄2W 5% CF12631
E-R3317.5M ohm 1⁄4W 5% CF14915
E-R3321M ohm Horz Trimpot14844
Capacitors
E-C277, C278.234mF 200V24290
E-C279, C2834.7mF 35V24019
E-C280, C281.01mF21751
E-C28233mF 50V Vertical13679
Diodes
E-D172, D173, D1741N414833181
Integrated Circuits
E-IC124TL07414696
E-IC140MC14016 Quad Switch3/brd4834
E-IC135MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1242N5459 N-Ch FET13053
Low Filter #9
Resistors
E-RN146Resistor Network14715
E-RN147Resistor Network14712
E-R3151K ohm Helipot Trim13669Frequency Adjust
E-R3165K ohm Helipot Trim13670Filter Gain Adjust
E-R317, R3181M ohm 1⁄4W 5% CF23198
E-R319, R3201.5M ohm 1⁄4W 5% CF24234
E-R32110K ohm 1⁄2W 5% CF12631
E-R3227.5M ohm 1⁄4W 5% CF14915
E-R3231M ohm Horz Trimpot14844
Capacitors
E-C270, C271.117mF 200V24291
E-C272, C2764.7mF 35V24019
E-C273, C274.01mF21751
E-C27533mF 50V Vertical13679
Diodes
E-D169, D170, D1711N414833181
Integrated Circuits
E-IC123TL07414696
E-IC140MC14016 Quad Switch3/brd4834
E-IC134MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1232N5459 N-Ch FET13053
Schematic DesignationDescriptionCrown
Qty.Part No.Other Information
Low Filter #10
Resistors
E-RN144Resistor Network14713
E-RN145Resistor Network14712
E-R3051K ohm Helipot Trim13669Frequency Adjust
E-R3065K ohm Helipot Trim13670Filter Gain Adjust
E-R307, R3081M ohm 1⁄4W 5% CF23198
E-R309, R3101.5M ohm 1⁄4W 5% CF24234
E-R31110K ohm 1⁄2W 5% CF12631
E-R3127.5M ohm 1⁄4W 5% CF14915
E-R3131M ohm Horz Trimpot14844
E-R3145.6K ohm 1⁄4W 5% CF13220
Capacitors
E-C262.117mF 200V24291
E-C264, C268, C2694.7mF 35V34019
E-C265, C266.01mF21751
E-C26733mF 50V Vertical13679
Diodes
E-D166, D167
D1681N414833181
Integrated Circuits
E-IC122TL07414696
E-IC140MC14016 Quad Switch3/brd4834
E-IC134MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1222N5459 N-Ch FET13053
Low Filter #11
Resistors
E-RN142Resistor Network14714
E-RN143Resistor Network14712
E-R2961K ohm Helipot Trim13669Frequency Adjust
E-R2975K ohm Helipot Trim13670Filter Gain Adjust
E-R298, R2991M ohm 1⁄4W 5% CF23198
E-R300, R3011.5M ohm 1⁄4W 5% CF24234
E-R30210K ohm 1⁄2W 5% CF12631
E-R3037.5M ohm 1⁄4W 5% CF14915
E-R3041M ohm Horz Trimpot14844
Schematic DesignationDescriptionQty.Crown Part No.Other Information
Capacitors
E-C255, C256.117mF 200V24291
E-C257, C2614.7mF 35V24019
E-C258, C259.01mF21751
E-C26033mF 50V Vertical13679
Diodes
E-D163, D164, D1651N414833181
Integrated Circuits
E-IC121TL07414696
E-IC140MC14016 Quad Switch3/brd4834
E-IC134MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1212N5459 N-Ch FET13053
Low Filter #12
Resistors
E-RN140Resistor Network14715
E-RN141Resistor Network14712
E-R2871K ohm Helipot Trim13669Frequency Adjust
E-R2885K ohm Helipot Trim13670Filter Gain Adjust
E-R289, R2901M ohm 1⁄4W 5% CF23198
E-R291, R2921.5M ohm 1⁄4W 5% CF24234
E-R29310K ohm 1⁄2W 5% CF12631
E-R2947.5M ohm 1⁄4W 5% CF14915
E-R2951M ohm Horz Trimpot14844
Capacitors
E-C248, C249.058mF 100V24292
E-C250, C2544.7mF 35V24019
E-C251, C252.01mF21751
E-C25333mF 50V Vertical13679
Diodes
E-D160, D161, D1621N414833181
Integrated Circuits
E-IC120TL07414696
E-IC139MC14016 Quad Switch3/brd4834
E-IC134MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1202N5459 N-Ch FET13053

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Schematic DesignationDescriptionQty.Crown Part No.Other Information
Low Filter #13
Resistors
E-RN138Resistor Network14713
E-RN139Resistor Network14712
E-R2771K ohm Helipot Trim13669Frequency Adjust
E-R2785K ohm Helipot Trim13670Filter Gain Adjust
E-R279, R2801M ohm 1⁄4W 5% CF23198
E-R281, R2821.5M ohm 1⁄4W 5% CF24234
E-R28310K ohm 1⁄2W 5% CF12631
E-R2847.5M ohm 1⁄4W 5% CF14915
E-R2851M ohm Horz Trimpot14844
E-R2865.6K ohm 1⁄4W 5% CF13220
Capacitors
E-C240, C241.058mF 100V24292
E-C242, C246, C2474.7mF 35V34019
E-C243, C244.01mF21751
E-C24533mF 50V Vertical13679
Diodes
E-D157, D158, D1591N414833181
Integrated Circuits
E-IC119TL07414696
E-IC139MC14016 Quad Switch3/brd4834
E-IC134MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1192N5459 N-Ch FET13053
Low Filter #14
Resistors
E-RN136Resistor Network14714
E-RN137Resistor Network14712
E-R2681K ohm Helipot Trim13669Frequency Adjust
E-R2695K ohm Helipot Trim13670Filter Gain Adjust
E-R270, R2711M ohm 1⁄4W 5% CF23198
E-R272, R2731.5M ohm 1⁄4W 5% CF24234
E-R27410K ohm 1⁄2W 5% CF12631
E-R2757.5M ohm 1⁄4W 5% CF14915
E-R2761M ohm Horz Trimpot14844
Capacitors
E-C233, C234.058mF 100V24292
E-C235, C2394.7mF 35V24019
E-C236, C237.01mF21751
E-C23833mF 50V Vertical13679
Diodes
E-D154, D155, D1561N414833181
Integrated Circuits
E-IC118TL07414696
E-IC139MC14016 Quad Switch3/brd4834
E-IC134MC14051 8 Ch Multiplexer2, brd4835
Transistors
E-FET1182N5459 N-Ch FET13053
Low Filter #15
Resistors
E-RN134Resistor Network14715
E-RN135Resistor Network14712
E-R2591K ohm Helipot Trim13669Frequency Adjust
E-R2605K ohm Helipot Trim13670Filter Gain Adjust
E-R261, R2621M ohm 1⁄4W 5% CF23198
E-R263, R2641.5M ohm 1⁄4W 5% CF24234
E-R26510K ohm 1⁄2W 5% CF12631
E-R2667.5M ohm 1⁄4W 5% CF14915
E-R2671M ohm Horz Trimpot14844
Capacitors
E-C226, C227.0293mF 200V24293
E-C228, C2324.7mF 35V24019
E-C229, C230.01mF21751
E-C23133mF 50V Vertical13679
Diodes
E-D151, D152, D1531N414833181
Integrated Circuits
E-IC117TL07414696
E-IC139MC14016 Quad Switch3/brd4834
E-IC134MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1172N5459 N-Ch FET13053

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Schematic DesignationDescriptionCrown Qty. Part No.Other Information
Low Filter Board #16
Resistors
E-RN132Resistor Network14713
E-RN133Resistor Network14712
E-R2491K ohm Helipot Trim13669Frequency Adjust
E-R2505K ohm Helipot Trim13670Filter Gain Adjust
E-R251, R2521M ohm 1⁄4W 5% CF23198
E-R253, R2541.5M ohm 1⁄4W 5% CF24234
E-R25510K ohm 1⁄2W 5% CF12631
E-R2567.5M ohm 1⁄4W 5% CF14915
E-R2571M ohm Horz Trimpot14844
E-R2585.6K ohm 1⁄4W 5% CF13220
Capacitors
E-C218, C219.0293mF 200V24293
E-C220, C224, C2254.7mF 35V34019
E-C221, C222.01mF21751
E-C22333mF 50V Vertical13679
Diodes
E-D148, D149, D1501N414833181
Integrated Circuits
E-IC116TL07414696
E-IC139MC14016 Quad Switch3/brd4834
E-IC134MC14051 8 Ch Multiplexer2/brd4835
Transistors
E-FET1162N5459 N-Ch FET13053
Miscellaneous
RTA-2 Low Freq Filter Mod142007
14 Pin DIL IC Socket193450
16 Pin DIL IC Socket24508
ELow Filter Board14786*Not available for purchase
Schematic DesignationDescriptionCrownOther Information
Qty.Part No.
High Filter #17
Resistors
F-RN130Resistor Network14714
F-RN131Resistor Network14712
F-R2401K ohm Helipot Trim13669Frequency Adjust
F-R2415K ohm Helipot Trim13670Filter Gain Adjust
F-R242, R2431M ohm 1⁄4W 5% CF23198
F-R244, R2451.5M ohm 1⁄4W 5% CF24234
F-R24610K ohm 1⁄2W 5% CF12631
F-R2477.5M ohm 1⁄4W 5% CF14915
F-R2481M ohm Horz Trimpot14844
Capacitors
F-C211, C212.0293mF 200V24293
F-C213, C2174.7mF 35V24019
F-C214, C215.01mF21751
F-C21633mF 50V Vertical13679
Diodes
F-D145, D146, D1471N414833181
Integrated Circuits
F-IC115TL07414696
F-IC139MC14016 Quad Switch3/brd4834
F-IC133MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1152N5459 N-Ch FET13053
High Filter #18
Resistors
F-RN128Resistor Network14715
F-RN129Resistor Network14712
F-R2311K ohm Helipot Trim13669Frequency Adjust
F-R2325K ohm Helipot Trim13670Filter Gain Adjust
F-R233, R2341M ohm 1⁄4W 5% CF23198
F-R235, R2361.5M ohm 1⁄4W 5% CF24234
F-R23710K ohm 1⁄2W 5% CF12631
F-R2387.5M ohm 1⁄4W 5% CF14915
F-R2391M ohm Horz Trimpot14844
Capacitors
F-C204, C20514700pF 63V24283
F-C206, C2104.7mF 35V24019
F-C207, C208.01mF21751
F-C20933mF 50V Vertical13679
Schematic DesignationDescriptionCrown
Qty.Part No.Other Information
Diodes
F-D142, D143
D1441N414833181
Integrated Circuits
F-IC114TL07414696
F-IC138MC14016 Quad Switch3/brd4834
F-IC133MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1142N5459 N-Ch FET13053
High Filter #19
Resistors
F-RN126Resistor Network14713
F-RN127Resistor Network14712
F-R2211K ohm Helipot Trim13669Frequency Adjust
F-R2225K ohm Helipot Trim13670Filter Gain Adjust
F-R223, R2241M ohm 1⁄4W 5% CF23198
F-R225, R2261.5M ohm 1⁄4W 5% CF24234
F-R22710K ohm 1⁄2W 5% CF12631
F-R2287.5M ohm 1⁄4W 5% CF14915
F-R2291M ohm Horz Trimpot14844
F-R2305.6K ohm 1⁄4W 5% CF13220
Capacitors
F-C196, C19714700pF 63V24283
F-C198, C202, C2034.7mF 35V34019
F-C199, C200.01mF21751
F-C20133mF 50V Vertical13679
Diodes
F-D139, D140, D1411N414833181
Integrated Circuits
F-IC113TL07414696
F-IC138MC14016 Quad Switch3/brd4834
F-IC133MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1132N5459 N-Ch FET13053
Schematic DesignationDescriptionQty.Crown Part No.Other Information
High Filter #20
Resistors
F-RN124Resistor Network14714
F-RN125Resistor Network14712
F-R2121K ohm Helipot Trim13669Frequency Adjust
F-R2135K ohm Helipot Trim13670Filter Gain Adjust
F-R214, R2151M ohm 1⁄4W 5% CF23198
F-R216, R2171.5M ohm 1⁄4W 5% CF24234
F-R21810K ohm 1⁄2W 5% CF12631
F-R2197.5M ohm 1⁄4W 5% CF14915
F-R2201M ohm Horz Trimpot14844
Capacitors
F-C189, C19014700pF 63V24283
F-C191, C1954.7mF 35V24019
F-C192, C193.01mF21751
F-C19433mF 50V Vertical13679
Diodes
F-D136, D137, D1381N414833181
Integrated Circuits
F-IC112TL07414696
F-IC138MC14016 Quad Switch3/brd4834
F-IC133MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1122N5459 N-Ch FET13053
High Filter #21
Resistors
F-RN122Resistor Network14715
F-RN123Resistor Network14712
F-R2031K ohm Helipot Trim13669Frequency Adjust
F-R2045K ohm Helipot Trim13670Filter Gain Adjust
F-R205, R2061M ohm 1⁄4W 5% CF23198
F-R207, R2081.5M ohm 1⁄4W 5% CF24234
F-R20910K ohm 1⁄2W 5% CF12631
F-R2107.5M ohm 1⁄4W 5% CF14915
F-R2111M ohm Horz Trimpot14844
Capacitors
F-C182, C1837330pF 63V24284
F-C184, C1884.7mF 35V24019
F-C185, C186.01mF21751
F-C18733mF 50V Vertical13679
Schematic DesignationDescriptionCrownOther Information
Qty.Part No.
Diodes
F-D133, D134, D1351N414833181
Integrated Circuits
F-IC111TL07414696
F-IC137MC14016 Quad Switch3/brd4834
F-IC133MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1112N5459 N-Ch FET13053
High Filter #22
Resistors
F-RN120Resistor Network14713
F-RN121Resistor Network14712
F-R1931K ohm Helipot Trim13669Frequency Adjust
F-R1945K ohm Helipot Trim13670Filter Gain Adjust
F-R195, R1961M ohm 1⁄4W 5% CF23198
F-R197, R1981.5M ohm 1⁄4W 5% CF24234
F-R19910K ohm 1⁄2W 5% CF12631
F-R2007.5M ohm 1⁄4W 5% CF14915
F-R2011M ohm Horz Trimpot14844
F-R2025.6K ohm 1⁄4W 5% CF13220
Capacitors
F-C174, C1757330pF 63V24284
F-C176, C180, C1814.7mF 35V34019
F-C177, C178.01mF21751
F-C17933mF 50V Vertical13679
Diodes
F-D130, D131, D1321N414833181
Integrated Circuits
F-IC110TL07414696
F-IC137MC14016 Quad Switch3/brd4834
F-IC133MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1102N5459 N-Ch FET13053
Schematic DesignationDescriptionCrown
Qty.Part No.Other Information
High Filter #23
Resistors
F-RN118Resistor Network14714
F-RN119Resistor Network14712
F-R1841K ohm Helipot Trim13669Frequency Adjust
F-R1855K ohm Helipot Trim13670Filter Gain Adjust
F-R186, R1871M ohm 1⁄4W 5% CF23198
F-R188, R1891.5M ohm 1⁄4W 5% CF24234
F-R19010K ohm 1⁄2W 5% CF12631
F-R1917.5M ohm 1⁄4W 5% CF14915
F-R1921M ohm Horz Trimpot14844
Capacitors
F-C167, C1687330pF 63V24284
F-C169, C1734.7mF 35V24019
F-C170, C171.01mF21751
F-C17233mF 50V Vertical13679
Diodes
F-D127, D128, D1291N414833181
Integrated Circuits
F-IC109TL07414696
F-IC137MC14016 Quad Switch3/brd4834
F-IC133MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1092N5459 N-Ch FET13053
High Filter Board #24
Resistors
F-RN116Resistor Network14715
F-RN117Resistor Network14712
F-R1751K ohm Helipot Trim13669Frequency Adjust
F-R1765K ohm Helipot Trim13670Filter Gain Adjust
F-R177, R1781M ohm 1⁄4W 5% CF23198
F-R179, R1801.5M ohm 1⁄4W 5% CF24234
F-R18110K ohm 1⁄2W 5% CF12631
F-R1827.5M ohm 1⁄4W 5% CF14915
F-R1831M ohm Horz Trimpot14844
Capacitors
F-C160, C1613660pF 63V24285
F-C162, C1664.7mF 35V24019
F-C163, C164.01mF21751
F-C16533mF 50V Vertical13679

crown

Schematic DesignationDescriptionCrown Qty. Part No.Other Information
Diodes
F-D124, D125, D1261N414833181
Integrated Circuits
F-IC108TL07414696
F-IC137MC14016 Quad Switch3/brd4834
F-IC133MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1082N5459 N-Ch FET 13053
High Filter #25
Resistors
F-RN114Resistor Network14713
F-RN115Resistor Network14712
F-R1651K ohm Helipot Trim13669Frequency Adjust
F-R1665K ohm Helipot Trim13670Filter Gain Adjust
F-R167, R1681M ohm 1⁄4W 5% CF23198
F-R169, R1701.5M ohm 1⁄4W 5% CF24234
F-R17110K ohm 1⁄2W 5% CF12631
F-R1727.5M ohm 1⁄4W 5% CF14915
F-R1731M ohm Horz Trimpot14844
F-R1745.6K ohm 1⁄4W 5% CF13220
Capacitors
F-C152, C1533660pF 63V24285
F-C154, C158, C1594.7mF 35V34019
F-C155, C156.01mF21751
F-C15733mF 50V Vertical13679
Diodes
F-D121, D122, D1231N414833181
Integrated Circuits
F-IC107TL07414696
F-IC137MC14016 Quad Switch3/brd4834
F-IC132MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1072N5459 N-Ch FET13053
Schematic DesignationDescriptionCrownOther Information
Qty.Part No.
High Filter #26
Resistors
F-RN112Resistor Network14714
F-RN113Resistor Network14712
F-R1561K ohm Helipot Trim13669Frequency Adjust
F-R1575K ohm Helipot Trim13670Filter Gain Adjust
F-R158, R1591M ohm 1⁄4W 5% CF23198
F-R160, R1611.5M ohm 1⁄4W 5% CF24234
F-R16210K ohm 1⁄2W 5% CF12631
F-R1637.5M ohm 1⁄4W 5% CF14915
F-R1641M ohm Horz Trimpot14844
Capacitors
F-C145, C1463660pF 63V24285
F-C147, C1514.7mF 35V34019
F-C148, C149.01mF21751
F-C15033mF 50V Vertical13679
Diodes
F-D118, D119
D1201N414833181
Integrated Circuits
F-IC106TL07414696
F-IC137MC14016 Quad Switch3/brd4834
F-IC132MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1062N5459 N-Ch FET13053
High Filter #27
Resistors
F-RN110Resistor Network14715
F-RN111Resistor Network14712
F-R1471K ohm Helipot Trim13669Frequency Adjust
F-R1485K ohm Helipot Trim13670Filter Gain Adjust
F-R149, R1501M ohm 1⁄4W 5% CF23198
F-R151, R1521.5M ohm 1⁄4W 5% CF24234
F-R15310K ohm 1⁄2W 5% CF12631
F-R1547.5M ohm 1⁄4W 5% CF14915
F-R1551M ohm Horz Trimpot14844
Capacitors
F-C137, C1381830pF 63V24286
F-C139, C1434.7mF 35V24019
F-C140, C141.01mF21751
F-C14233mF 50V Vertical13679

CROWN RTA-2 - Ordering Parts - 1
crown

Schematic DesignationDescriptionCrownOther Information
Qty.Part No.
Diodes
F-D115, D116, D1171N414833181
Integrated Circuits
F-IC105TL07414696
F-IC136MC14016 Quad Switch3/brd4834
F-IC132MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1052N5459 N-Ch FET13053
High Filter #28
Resistors
F-RN108Resistor Network14713
F-RN109Resistor Network14712
F-R1371K ohm Helipot Trim13669Frequency Adjust
F-R1385K ohm Helipot Trim13670Filter Gain Adjust
F-R139, R1401M ohm 1⁄4W 5% CF23198
F-R141, R1421.5M ohm 1⁄4W 5% CF24234
F-R14310K ohm 1⁄2W 5% CF12631
F-R1447.5M ohm 1⁄4W 5% CF14915
F-R1451M ohm Horz Trimpot14844
F-R1465.6K ohm 1⁄4W 5% CF13220
Capacitors
F-C129, C1301830pF 63V24286
F-C131, C135, C1364.7mF 35V34019
F-C132.01mF21751
F-C13333mF 50V Vertical13679
Diodes
F-D112, D113, D1141N414833181
Integrated Circuits
F-IC104TL07414696
F-IC136MC14016 Quad Switch3/brd4834
F-IC132MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1042N5459 N-Ch FET13053
Schematic DesignationDescriptionCrown
Qty.Part No.Other Information
High Filter #29
Resistors
F-RN106Resistor Network14714
F-RN107Resistor Network14712
F-R1281K ohm Helipot Trim13669Frequency Adjust
F-R1295K ohm Helipot Trim13670Filter Gain Adjust
F-R130, R1311M ohm 1⁄4W 5% CF23198
F-R132, R1331.5M ohm 1⁄4W 5% CF24234
F-R13410K ohm 1⁄2W 5% CF12631
F-R1357.5M ohm 1⁄4W 5% CF14915
F-R1361M ohm Horz Trimpot14844
Capacitors
F-C122, C1231830pF 63V24286
F-C124, C1284.7mF 35V24019
F-C125, C126.01mF21751
F-C12733mF 50V Vertical13679
Diodes
F-C109, D110, D1111N414833181
Integrated Circuits
F-IC103TL07414696
F-IC136MC14016 Quad Switch3/brd4834
F-IC132MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1032N5459 N-Ch FET13053
High Filter #30
Resistors
F-RN104Resistor Network14715
F-RN105Resistor Network14712
F-R1191K ohm Helipot Trim13669Frequency Adjust
F-R1205K ohm Helipot Trim13670Filter Gain Adjust
F-R121, R1221M ohm 1⁄4W 5% CF23198
F-R123, R1241.5M ohm 1⁄4W 5% CF24234
F-R12510K ohm 1⁄2W 5% CF12631
F-R1267.5M ohm 1⁄4W 5% CF14915
F-R1271M ohm Horz Trimpot14844
Capacitors
F-C115, C116917pF 63V24287
F-C117, C1214.7mF 35V24019
F-C118, C119.01mF21751
F-C12033mF 50V Vertical13679
Schematic DesignationDescriptionCrown Qty. Part No.Other Information
Diodes
F-D106, D107, D1081N414833181
Integrated Circuits
F-IC102TL07414696
F-IC136MC14016 Quad Switch3/brd4834
F-IC132MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1022N5459 N-Ch FET13053
High Filter #31
Resistors
F-RN102Resistor Network14713
F-RN103Resistor Network14712
F-R1091K ohm Helipot Trim13669Frequency Adjust
F-R1105K ohm Helipot Trim13670Filter Gain Adjust
F-R111, R1121M ohm 1⁄4W 5% CF23198
F-R113, R1141.5M ohm 1⁄4W 5% CF24234
F-R11510K ohm 1⁄2W 5% CF12631
F-R1167.5M ohm 1⁄4W 5% CF14915
F-R1171M ohm Horz Trimpot14844
F-R1185.6K ohm 1⁄4W 5% CF13220
Capacitors
F-C107, C108917pF 63V24287
F-C109, C113, C1144.7mF 35V34019
F-C110, C111.01mF21751
F-C11233mF 50V Vertical13679
Diodes
F-D103, D104, D1051N414833181
Integrated Circuits
F-IC101TL07414696
F-IC136MC14016 Quad Switch3/brd4834
F-IC132MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1012N5459 N-Ch FET13053
Schematic DesignationDescriptionQty.Crown Part No.Other Information
High Filter Board #32
Resistors
F-RN100Resistor Network14714
F-RN101Resistor Network14712
F-R1001K ohm Helipot Trim13669Frequency Adjust
F-R1015K ohm Helipot Trim13670Filter Gain Adjust
F-R102, R1031M ohm 1⁄4W 5% CF23198
F-R104, R1051.5M ohm 1⁄4W 5% CF24234
F-R10610K ohm 1⁄2W 5% CF12631
F-R1077.5M ohm 1⁄4W 5% CF14915
F-R1081M ohm Horz Trimpot Capacitors14844
F-C100, C101917pF 63V24287
F-C102, C1064.7mF 35V24019
F-C103, C104.01mF21751
F-C10533mF 50V Vertical13679
Diodes
F-D100, D101, D1021N414833181
Integrated Circuits
F-IC100TL07414696
F-IC136MC14016 Quad Switch3/brd4834
F-IC132MC14051 8 Ch Multiplexer2/brd4835
Transistors
F-FET1002N5459 N-Ch FET13053
Miscellaneous
RTA-2 High Freq Filter Mod142006
14 Pin DIL IC Socket193450
16 Pin DIL IC Socket24508
FHigh Filter Board14787*Not available for purchase
Manual assistant
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Product information

Brand : CROWN

Model : RTA-2

Category : Analyseur audio