TR-2A - Unspecified Kramer - Free user manual and instructions

Product Type	Twisted Pair Receiver
Brand	Kramer
Model	TR-2A
Dimensions (W x D x H)	12 cm x 7.5 cm x 2.5 cm
Weight	0.3 kg
Power Supply	12V DC, 0.5A
Input Connector	RJ-45
Output Connector	VGA (HD-15) or Composite (BNC) depending on variant
Maximum Range	Up to 100 meters
Supported Signals	Analog video (VGA/Component/Composite) and audio
Video Bandwidth	300 MHz
Audio Support	Stereo unbalanced audio
LED Indicators	Power and Signal presence
Enclosure Material	Metal
Operating Temperature	0°C to 40°C
Storage Temperature	-20°C to 60°C
Humidity	10% to 90%, non-condensing
Included Accessories	Power adapter, mounting brackets
Maintenance	Wipe with dry cloth; do not use liquids
Safety Precautions	Keep away from moisture and direct sunlight
Spare Parts Availability	Contact Kramer for replacement parts
Repairability	Serviceable by authorized technicians only

Frequently Asked Questions - TR-2A Kramer

What is the maximum distance the TR-2A can transmit signal?

The TR-2A can receive signals from up to 100 meters over twisted pair cable.

What type of cable is required?

Use CAT5e or higher shielded twisted pair cable for best performance.

Can I use the TR-2A with component video?

Yes, the TR-2A supports component video via appropriate cabling and adapter.

Does the TR-2A require separate power for audio?

No, both video and audio are transmitted over the same twisted pair; the unit receives power from its dedicated 12V DC adapter.

How do I connect the TR-2A?

Connect the twisted pair cable to the RJ-45 input on the receiver. Then connect your display to the output (VGA or BNC). Ensure the transmitter is properly connected and powered.

What does the LED indicator mean?

A steady green LED indicates power is on and signal is detected. If off, check power and cable connections.

Can I daisy-chain multiple TR-2A units?

No, the TR-2A is designed as a point-to-point receiver; daisy-chaining is not supported.

Is the TR-2A compatible with Kramer transmitters?

Yes, it is specifically designed to work with Kramer TP series transmitters for optimal compatibility.

How do I clean the TR-2A?

Use a soft dry cloth to wipe the exterior. Do not use any liquids or abrasive cleaners.

What should I do if the unit stops working?

First check the power adapter and cable connections. If the issue persists, contact Kramer support for further assistance.

USER MANUAL TR-2A Kramer

Kramer Electronics, Ltd.

Abstract black geometric shape on white background (no text or symbols)

KRAMER

USER MANUAL

Models:

TR-1, Video Isolation Transformer

TR-1A, Audio Isolation Transformer

TR-2A, Audio Isolation Transformers

TR-3, Video / Audio Isolation Transformers

Contents

1 Introduction 1
2 Getting Started 1
3 Overview 2
4 Your Isolation Transformers 3
5 Using the Isolation Transformer 7
5.1 Connecting the Isolation Transformer 7
5.2 Setting the dipswitches 9
5.2.1 Audio Dipswitches 10
5.2.2 Video Dipswitches 11
6 Technical Specifications 12

Figures

Figure 1: TR-1 Video Isolation Transformer 3
Figure 2: TR-1A Audio Isolation Transformer 4
Figure 3: TR-2A Audio Isolation Transformers 5
Figure 4: TR-3 Video / Audio Isolation Transformers 6
Figure 5: Connecting the TR-3 Video / Audio Isolation Transformer 8
Figure 6: Dipswitch Settings for TR-3. TR-2A and TR-1A 9
Figure 7: IN and OUT Grounding Options 10
Figure 8: Balanced Audio Grounding Schematics 10
Figure 9: Unbalanced Audio Grounding Schematics 11
Figure 10: Video Grounding Schematics 11

Tables

Table 1: TR-1, TR-1A, TR-2A and TR-3 Characteristics 2
Table 2: Features and Functions of the TR-1 Video Isolation Transformer 3
Table 3: Features and Functions of the TR-1A Audio Isolation Transformer 4
Table 4: Features and Functions of the TR-2A Audio Isolation Transformers 5
Table 5: Features and Functions of the TR-3 Video / Audio Isolation Transformers 6
Table 6: Connecting the TR-1, TR-1A and TR-2A 8
Table 7: Dipswitch Settings 9
Table 8: Audio Dipswitch Settings 10
Table 9: Video Dipswitch Settings 11
Table 10: Technical Specifications of the Isolation Transformers 12

1 Introduction

Welcome to Kramer Electronics (since 1981): a world of unique, creative and affordable solutions to the infinite range of problems that confront the video, audio and presentation professional on a daily basis. In recent years, we have redesigned and upgraded most of our line, making the best even better! Our 500-plus different models now appear in 8 Groups which are clearly defined by function.

Congratulations on purchasing your Kramer TR-1 Video Isolation Transformer, TR-1A Audio Isolation Transformer ^2 , TR-2A Audio Isolation Transformers ^3 or TR-3 Video / Audio Isolation Transformers ^3 .

This product is ideal for:

• Broadcast and production audio/video studios
  • Audio/video duplication studios
  • Staging and fieldwork

The package includes the following items:

• TR-1 or TR-1A or TR-2A or TR-3

- This user manual ^4

2 Getting Started

We recommend that you:

• Unpack the equipment carefully and save the original box and packaging materials for possible future shipment
  • Review the contents of this user manual

3 Overview

In many applications, the connection between video and/or audio sources and acceptors induces 50Hz or 60Hz ground loops, with an undesirable effect such as hum bars ^1 and audio hum.

The Kramer Isolation Transformers break the ground connection in audio/video transmission lines eliminating the hum caused by ground loops ^2 .

The high-performance Kramer Isolation Transformers are designed for applications in which interference problems—due to improper grounding and different ground potentials—affect the quality of the audio/video signal. It can also be used to remove DC potentials, as well as for removal of common mode noise (for example, induced on long cable runs). The Isolation Transformers are purely passive units and are ideal for fieldwork.

The Isolation Transformers:

• Include a video bandwidth of 5.8MHz and an audio bandwidth from 20Hz to 20kHz
  • Have excellent linearity
• Offer total galvanic isolation between input and output

Table 1 describes the unique characteristics of each unit:
Table 1: TR-1, TR-1A, TR-2A and TR-3 Characteristics

Machine Name	Isolates and Transforms
TR-1	One video channel
TR-1A	One audio channel (mono)
TR-2A	Two audio channels (stereo)
TR-3	One video channel and two audio channels (Stereo)

To achieve the best performance:

• Connect only good quality connection cables, thus avoiding interference, deterioration in signal quality due to poor matching, and elevated noise levels (often associated with low quality cables)
• Avoid interference from neighboring electrical and magnetic appliances that may adversely influence signal quality and position your Kramer Isolation Transformer away from moisture, excessive sunlight and dust

4 Your Isolation Transformers

This section defines each of the Isolation Transformer units:

• Figure 1 and Table 2 define the TR-1 Video Isolation Transformer
• Figure 2 and Table 3 define the TR-1A Audio Isolation Transformer
• Figure 3 and Table 4 define the TR-2A Audio Isolation Transformers
• Figure 4 and Table 5 define the TR-3 Video / Audio Isolation Transformers

1 VIDEO OUT VIDEO IN KRAMER TOOLS Video Isolation Transformer TR-1 2 3

Figure 1: TR-1 Video Isolation Transformer

Table 2: Features and Functions of the TR-1 Video Isolation Transformer

# Feature Function
1	VIDEO OUT BNC Connector	Connects to the video output
2	VIDEO IN BNC Connector	Connects to the video input
3 Ground In the case that you want		to connect the unit to an external ground

Figure 2: TR-1A Audio Isolation Transformer
Table 3: Features and Functions of the TR-1A Audio Isolation Transformer

# Feature Function
1 Ground In the case that you want to connect the unit to an external ground
2 IN	Block Connector	^1 Audio input
3		OUT Connects to the balanced ^1 audio output
4 Dip switches See section 5.2

1 2 3 4 5 AUDIO RIGHT IN OUT AUDIO LEFT IN OUT - + GG - + - + GG - +

KRAMER TOOLS Audio Isolation Transformers TR-2A

AUDIO L OUT G AUDIO L IN G N.U. AUDIO R IN G AUDIO R OUT G N.U. 6 7

Figure 3: TR-2A Audio Isolation Transformers

Table 4: Features and Functions of the TR-2A Audio Isolation Transformers

# Feature Function
1 Ground In the case that you want to connect the unit to an external ground
2 IN	Block Connector	OUT Connects to the right balanced ^1 audio input
3
4 IN	Block Connector	OUT Connects to the left balanced ^1 audio output
5
6 Dip switches for AUDIO L (Left)			See section 5.2
7 Dip switches for AUDIO R (Right)

1 2 AUDIO RIGHT IN OUT + GG + 3 4 VIDEO IN AUDIO LEFT IN OUT + GG + 5 6 KRAMER TOOLS Video / Audio Isolation Transformers TR-3 8 9 AUDIO L OUT G AUDIO L IN G VIDEO OUT G AUDIO R IN G AUDIO R OUT G VIDEO IN G

Figure 4: TR-3 Video / Audio Isolation Transformers

Table 5: Features and Functions of the TR-3 Video / Audio Isolation Transformers

# Feature Function
1 Ground In the case that you want to connect the unit to an external ground
2 IN	Block Connector	OUT	^1 audio input
3			^1 connects to the right balanced ^1 audio output
4	VIDEO IN BNC Connector		Connects to the video input
5	VIDEO OUT BNC Connector		Connects to the video output
6 IN	Block Connector	OUT	^1 connects to the left balanced ^1 audio output
7
8 Dipswitches for AUDIO L (Left)			See section 5.2
9 Dipswitches for AUDIO R (Right)

5 Using the Isolation Transformer

The Isolation Transformers are used for video signals (TR-1); video and balanced ^1 stereo audio signals (TR-3); balanced ^1 mono audio signals (TR-1A); and balanced ^1 stereo audio signals (TR-2A).

There are no general rules as to how and where to connect the Isolation Transformers. This depends on many factors, which relate to the setup of the studio, improper grounding and so on.

The best method is to disconnect all the equipment and then connect it one by one, checking for hum, as each piece of equipment is connected. When hum is detected, the appropriate Isolation Transformer is connected at that point to break the ground loop.

The Isolation Transformers also provide different grounding combinations, which are set via the dipswitches for optimum operation.

This section describes how to connect an Isolation Transformer (see section 5.1), and set the dipswitches for optimum performance (see section 5.2).

5.1 Connecting the Isolation Transformer

When installing an Isolation Transformer, you just connect it somewhere on the line between the source and the acceptor. The particular example in

Figure 5 shows how to connect the TR-3 Video /Audio Isolation Transformers. However, this is not a specific recommendation, as there are many different configuration options.

To connect the TR-3, do the following ^2 :

1. Connect a video source (for example, a composite video player) to the VIDEO IN BNC connector.
2. Connect the VIDEO OUT BNC connector to a video acceptor (for example, a composite video display).
3. Connect a balanced ^3 audio stereo signal source (for example, a balanced stereo audio player) to the AUDIO RIGHT IN terminal block connector and the AUDIO LEFT IN terminal block connector.
4. Connect the AUDIO RIGHT OUT and the AUDIO LEFT OUT terminal block connectors to a balanced audio stereo acceptor (for example, a power amplifier).

5. Turn the power ON on the audio/video sources and acceptors.

6. Set the dipswitches ^1 for optimum performance (see section 5.2).

The same principles apply to the TR-1, TR-1A and TR-2A. Simply connect the units anywhere between the sources and acceptors, as Table 6 defines:

Table 6: Connecting the TR-1, TR-1A and TR-2A

Connect the Source Connect the Acceptor
TR-1	A video signal (for example, a composite video player)	A composite video acceptor (for example, a composite video display)
TR-1A	A balanced ^2 audio signal (for example, a balanced mono microphone)	A balanced ^2 audio acceptor (for example, a power amplifier)
TR-2A	A balanced ^2 stereo audio signal (for example, a balanced stereo audio player)	A balanced ^2 stereo audio acceptor (for example, a power amplifier)

graph TD
    A["TA-3 Audio Transceiver"] --> B["TA-3 TA-3"]
    B --> C["Audio Left"]
    C --> D["Audio Left"]
    D --> E["Composite Video Player"]
    E --> F["Composite Video Display"]
    F --> G["Power Amplifier"]
    G --> H["Balanced/Unbalanced Stereo Audio Player"]
    H --> I["Composite Video Player"]
    I --> J["Composite Video Display"]
    J --> K["Power Amplifier"]

Figure 5: Connecting the TR-3 Video / Audio Isolation Transformer

5.2 Setting the dipswitches

Figure 6 and Table 7 define ^1 the factory default dipswitches:

TR-3
TR-2A
TR-1A

Figure 6: Dipswitch Settings for TR-3. TR-2A and TR-1A

Table 7: Dipswitch Settings

DIPS Name Description
AUDIO LEFT	1 Chassis ground
	2 AUDIO L OUT G The output audio signal ground
	3 AUDIO L IN G The input audio signal ground
	4 VIDEO OUT G
AUDIO RIGHT	1 VIDEO IN G
	2 AUDIO R OUT G The output audio signal ground
	3 AUDIO R IN G The input audio signal ground
	4 Chassis ground

The grounding conditions are set by trial and error. Check all the options to work out which option best suits your needs ^1 .

5.2.1 Audio Dipswitches

The dipswitches let you set the grounding conditions, as illustrated in Figure 7 and defined in Table 8 for the audio channels.

AUDIO RIGHT IN OUT - + GG - + VIDEO IN 4 3 2 1 VIDEO OUT 4 3 2 1 AUDIO LEFT IN OUT - + GG - +

Figure 7: IN and OUT Grounding Options

Table 8: Audio Dipswitch Settings ^2

AUDIO LEFT Description AUDIO RIGHT
1 2	3 2	3 4
ON ON ON Audio IN and OUT are grounded to the chassis ON ON ON
ON ON OFF Audio OUT shield is connected to the common ground, audio IN shield is left open				ON OFF ON
ON OFF ON Audio IN is connected to chassis, audio OUT is grounded to the shield				OFF ON ON
OFF ON ON Audio IN and OUT are both grounded to the shield ON ON OFF

Figure 8 and Figure 9 show the balanced and unbalanced audio grounding schematics respectively.

+ - G IN OUT G + - G

Figure 8: Balanced Audio Grounding Schematics

+ - G IN OUT G + - G

Figure 9: Unbalanced Audio Grounding Schematics

5.2.2 Video Dipswitches

Table 9 defines the video ground conditions that are set by DIP 4 on the left and DIP 1 on the right:

Table 9: Video Dipswitch Settings

VIDEO OUT G (DIP 4)	VIDEO IN G (DIP 1)	Description
ON ON Video IN	N and OUT are grounded to the chassis
ON OFF Video	OUT is grounded to the chassis; video IN is not
OFF ON Video	IN is grounded to the chassis; video OUT is not
OFF OFF Video	IN and OUT are not grounded to the chassis

Figure 10 illustrates the video grounding schematics.

IN OUT

Figure 10: Video Grounding Schematics

6 Technical Specifications

Table 10: Technical Specifications ^1 of the Isolation Transformers

INPUTS:	TR-3: 1 composite video, 1Vpp/75Ω on a BNC connector,2 balanced audio +4dBu/600Ω on detachable terminal blocks;TR-2A: 2 balanced audio +4dBu/600Ω on detachable terminal blocks;TR-1A: 1 balanced audio +4dBu/600Ω on a detachable terminal block;TR-1: 1 composite video, 1Vpp/75Ω on a BNC connector
OUTPUTS:	TR-3: 1 composite video, 1Vpp/75Ω on a BNC connector,2 balanced audio +4dBu/600Ω on detachable terminal blocks;TR-2A: 2 balanced audio +4dBu/600Ω on detachable terminal blocks;TR-1A: 1 balanced audio +4dBu/600Ω on a detachable terminal block;TR-1: 1composite video, 1Vpp/75Ω on a BNC connector
MAX. OUTPUT LEVEL:	VIDEO: 4Vpp / 75Ω	AUDIO: +26dBu
BANDWIDTH (-3dB): VIDEO: <10Hz to 5.8MHz; -3dB AUDIO: 20Hz to 20kHz
DIFF. GAIN: 0.05%
DIFF. PHASE: 0.05 Deg
K-FACTOR: <1.2%
S/N RATIO: VIDEO: 73dB AUDIO: -83dBu @+4dBu/1000Hz
CONTROLS: Dipswitches to connect to chassis
VIDEO TILT: 0.1% @ Pulse & Bar
VIDEO NON LINEARITY: 0.1%
COUPLING: VIDEO: Transformer AUDIO: Transformer
AUDIO THD + NOISE:	≤ 0.025% @+4dBu/1000Hz
DIMENSIONS:	TR-3, TR-2A, TR-1A: 12.1cm x 7.2cm x 3cm (4.77" x 2.85" x 1.2") W, D, HTR-1: 12cm x 7.3cm x 3cm (4.7" x 2.88" x 1.2") W, D, H
WEIGHT: 0.34 kg. (0.75lbs.) approx.
ACCESSORIES: Mounting brackets

LIMITED WARRANTY

Kramer Electronics (hereafter Kramer) warrants this product free from defects in material and workmanship under the following terms.

HOW LONG IS THE WARRANTY

Labor and parts are warranted for seven years from the date of the first customer purchase.

WHO IS PROTECTED?

Only the first purchase customer may enforce this warranty.

WHAT IS COVERED AND WHAT IS NOT COVERED

Except as below, this warranty covers all defects in material or workmanship in this product. The following are not covered by the warranty:

1. Any product which is not distributed by Kramer, or which is not purchased from an authorized Kramer dealer. If you are uncertain as to whether a dealer is authorized, please contact Kramer at one of the agents listed in the web site www.kramerelectronics.com.
2. Any product, on which the serial number has been defaced, modified or removed.
3. Damage, deterioration or malfunction resulting from:

i) Accident, misuse, abuse, neglect, fire, water, lightning or other acts of nature
ii) Product modification, or failure to follow instructions supplied with the product
iii) Repair or attempted repair by anyone not authorized by Kramer
iv) Any shipment of the product (claims must be presented to the carrier)
v) Removal or installation of the product
vi) Any other cause, which does not relate to a product defect
vii) Cartons, equipment enclosures, cables or accessories used in conjunction with the product

WHAT WE WILL PAY FOR AND WHAT WE WILL NOT PAY FOR

We will pay labor and material expenses for covered items. We will not pay for the following:

1. Removal or installations charges.
2. Costs of initial technical adjustments (set-up), including adjustment of user controls or programming. These costs are the responsibility of the Kramer dealer from whom the product was purchased.
3. Shipping charges.

HOW YOU CAN GET WARRANTY SERVICE

1. To obtain service on you product, you must take or ship it prepaid to any authorized Kramer service center.
2. Whenever warranty service is required, the original dated invoice (or a copy) must be presented as proof of warranty coverage, and should be included in any shipment of the product. Please also include in any mailing a contact name, company, address, and a description of the problem(s).
3. For the name of the nearest Kramer authorized service center, consult your authorized dealer.

LIMITATION OF IMPLIED WARRANTIES

All implied warranties, including warranties of merchantability and fitness for a particular purpose, are limited in duration to the length of this warranty.

EXCLUSION OF DAMAGES

The liability of Kramer for any effective products is limited to the repair or replacement of the product at our option. Kramer shall not be liable for:

1. Damage to other property caused by defects in this product, damages based upon inconvenience, loss of use of the product, loss of time, commercial loss; or:
2. Any other damages, whether incidental, consequential or otherwise. Some countries may not allow limitations on how long an implied warranty lasts and/or do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations and exclusions may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights, which vary from place to place.

NOTE: All products returned to Kramer for service must have prior approval. This may be obtained from your dealer.

This equipment has been tested to determine compliance with the requirements of:

EN-50081: "Electromagnetic compatibility (EMC);

generic emission standard.

Part 1: Residential, commercial and light industry"

EN-50082: "Electromagnetic compatibility (EMC) generic immunity standard.

Part 1: Residential, commercial and light industry environment".

CFR-47: FCC Rules and Regulations:

Part 15: "Radio frequency devices

Subpart B – Unintentional radiators”

CAUTION!

Servicing the machines can only be done by an authorized Kramer technician. Any user who makes changes or modifications to the unit without the expressed approval of the manufacturer will void user authority to operate the equipment.
☒ Use the supplied DC power supply to feed power to the machine.
☒ Please use recommended interconnection cables to connect the machine to other components.

For the latest information on our products and a list of Kramer distributors, visit our Web site: www.kramerelectronics.com, where updates to this user manual may be found.

We welcome your questions, comments and feedback.

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