HMMS-15 - Unknown Holland Electronics - Free user manual and instructions

Product Type	Fixed Channel SAW Filtered Modulator
RF Output Channels	CATV 2-117, UHF 14-59
Output Level	45 dBmV (min), adjustable over 12 dB range
A/V Carrier Ratio	-9 to -20 dB
Visual Carrier Stability	±5 KHz
Aural Carrier Offset	±4.5 MHz
Aural Carrier Stability	±1 KHz
Spurious Outputs	-62 dBc
C/N Ratio (in-band)	-62 dBc
Broadband Noise	-95 dBc
Video Input Level (min)	0.5 Vp-p
Video Frequency Response	±1 dB (50 Hz to 4.2 MHz)
Video S/N Ratio	60 dB
Hum Ratio	-60 dB
Differential Gain	3%
Differential Phase	2 degrees
Group Delay	75 nsec
Audio Input Level	200 mV (25 kHz deviation)
Audio Input Impedance	10 kΩ
Audio Frequency Response	±1 dB (50 Hz - 15 kHz)
Audio Distortion (THD)	1%
Pre-Emphasis	75 μsec
Mounting	Slides into HMR rack
Power Supply	External via HMPS (3-pin connector)
Warranty	5 years limited

Frequently Asked Questions - HMMS-15 Holland Electronics

How do I set the RF output level on the HMMS-15?

Use the RF output adjustment knob on the front panel while monitoring with a spectrum analyzer or field strength meter connected to the RF OUT port. Adjust until the desired output level is achieved.

What is the correct A/V carrier ratio adjustment?

Set the A/V adjustment such that the audio carrier is 12 to 17 dB below the video carrier. This ensures proper audio-video balance.

Why is my picture distorted or buzzing?

Distortion or buzzing is typically caused by over-modulation. Reduce the VIDEO adjustment to avoid over-driving the modulator. Over-modulation results in buzzing sounds, overly bright scenes, and distorted pictures.

What should I do if there is no video output?

Check the video input connection and ensure the signal is at least 0.5 Vp-p. Also verify the modulator is powered and the RF OUT is properly connected. Allow the unit to warm up for at least 30 minutes.

Can the HMMS-15 be used outdoors?

No, the HMMS-15 is not waterproof. Do not expose it to rain or moisture to avoid electrical shock or damage. Install it indoors or in a protected environment.

What channels does the HMMS-15 support?

It supports CATV channels 2-117 and UHF channels 14-59. Ensure your television is set to the correct channel.

How do I install the modulator in a rack?

Slide the HMMS unit into the HMR rack until it locks. Then connect the 3-pin power plug from the HMPS power supply to the power jack on the rear of the HMMS.

What is the purpose of the AUDIO adjustment?

The AUDIO adjustment sets the audio level so that the sound from the modulator matches the volume of an off-air channel. Turn it until the sound is equal in volume.

What does the warranty cover?

The 5-year limited warranty covers defects in workmanship and material. Holland Electronics will repair or replace the unit free of charge if found defective. Call [phone] for an RMA number before returning.

How do I prevent electric shock when connecting the power plug?

Do not use the plug with an extension cord, receptacle, or outlet unless the blades can be fully inserted to prevent exposure. Follow NEC Article 820-22 for proper grounding.

USER MANUAL HMMS-15 Holland Electronics

Fixed Channel SAW Filtered Modulator

HMMS SPECIFICATIONS:

RF Output Channels CATV 2-117, UHF 14-59

Output	Level	45dBmv	(min)
Range:		12Db	(adj)
A/V carrier ratio	-9 to -20dB
Visual Carrier Stability	±5KHz
Aural	Carrier	Offset	±4.5MHz
Aural	Carrier	Stability	±1 KHz
Spurious	Outputs(dBc)		-62 dBc
C/N Ratio (in-band)	-62 dBc
Broadband	Noise(dBc)		-95

Visual

Min	Video	Input	.5Vp-p
Frequency		Response	±1dB (50Hz to 4.2 MHz)
Video	S/N		60dB
Hum	Ratio		-60dB
Differential		Gain	3%
Differential		Phase	2 degree
Group	Delay		75nsec

AURAL

Input Requirements	200MV (25khz dev)
Input	Impedance	10Kohm
Frequency	Response	±1 dB: 50Hz-15Khz:
Distortion	(THD)	1%
Pre-Emphasis		75usec

Installation Instructions:

1. Slide the model HMMS unit into the HMR rack
2. Power up the modulator by connecting the 3 pin power plug from the HMPS to power jack in the rear of the HMMS.
3. Allow the HMMS to warm up for at least 30 minutes
4. Connect a spectrum analyzer or field strength meter to the modulator RF OUT port
5. Turn the RF output adjustment on the front of the modulator to get desired output level
6. Turn the A/V adjustment to set the audio carrier 12 to 17 dB below the video carrier
7. Remove analyzer or field strength meter from the modulator RF OUT port
8. Connect baseband audio and video signals to the AUDIO IN and VIDEO IN ports respectively
9. Connect modulator RF output to television/monitor. (Make sure to use the proper size attenuator between the modulator and television so as not to overdrive the television
10. Turn on television and set to modulator channel
11. Turn the AUDIO adjustment on the front of the modulator to set the sound on the television equal in volume to an off-air channel
12. Turn the VIDEO adjustment to set the video modulation.
    Over-modulation causes buzzing sounds, overly bright scenes, and distorted pictures.
    Under-modulation results in pictures with dull white levels and dark colors.
13. Remove television/monitor and attenuator from the modulator RF OUT port.
14. Connect modulator RF OUT port to the RF input of the head-end system

IMPORTANT!!

WARNING: Holland Electronics does NOT represent this product to be WATERPROOFED. To reduce risk of electrical shock, fire hazard, or damage to the unit, do not expose to rain or moisture.

CAUTION: To prevent electric shock, do not use this plug with an extension cord, receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure.

NOTE TO INSTALLER: This reminder calls the system installer's attention to Article 820-22 of the NEC that provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as practical.

WARNING: TO PREVENT FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE

HOLLAND ELECTRONICS LLC LIMITED WARRANTY

Holland ELECTRONICS LLC, warrants that the product enclosed with this Limited Warranty statement will conform to the manufacturer's specifications and be free of defects in the workmanship and material for a period of five years (5) from the date of original purchase.

WARRANTY PROCEDURE:

If the product appears to be defective contact Holland Electronics LLC at [phone]. We will analyze the problem and offer solutions to prevent removing the unit from service. If the unit is to be returned for evaluation, you will be issued a Return Material Authorization (RMA) number.

Holland Electronics LLC will, at its option, repair or replace the defective unit, under warranty, without charge for parts or labor. This repair will be subject to charges if signs of tampering or misuse are detected. Incoming shipping costs will be the customer's responsibility. Returns will not be accepted without an RMA number.

The warranty and remedy provided above are exclusive and in lieu of all other express warranties and unless stated herein, any statements or representations made by any other person or firm are void. The duration of any implied warranties of merchantability or fitness for a particular purpose on this product shall be limited to the duration of the express warranty set fourth above. Except as provided in this written warranty, Holland Electronics LLC shall not be liable for any loss, inconvenience, or damage, including direct, special, incidental, or consequential damages, resulting from the use or inability to use this product, whether resulting from breach of warranty or any other legal theory.

Some states do not allow limitations on how long an implied warranty lasts and some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation and exclusion may not apply to you.

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

To arrange for Warranty Service: Call Holland Electronics LLC [phone]