Drake VMM600 User Manual

VMM 600/VMM 806 VIDEO MODULATOR SYSTEM 1

4 WARRANTY AND SPECIFICATIONS

THREE YEAR LIMITED WARRANTY

R.L. DRAKE HOLDINGS LLC warrants to the original purchaser this product shall be free from defects in material or workmanship for three (3) years from the date of original purchase. During the warranty period R.L. DRAKE HOLDINGS LLC or an authorized Drake service facility will provide, free of charge, both parts and labor necessary to correct defects in material and workmanship. At its option, R.L. DRAKE HOLDINGS LLC may replace a defective unit.

To obtain such a warranty service, the original purchaser must:

1. Retain invoice or original proof of purchase to establish the start of the warranty period.

2. Notify R.L. DRAKE HOLDINGS LLC or the nearest authorized service facility, as soon as possible after discovery of a possible defect, of:

Correct maintenance, repair, and use are important to obtain proper performance from this product. Therefore carefully read the Instruction Manual. This warranty does not apply to any defect that R.L. DRAKE HOLDINGS LLC determines is due to:

quality and specifications of the original parts.

All implied warranties, if any, including warranties of merchantability and fitness for a particular purpose, terminate three (3) years from the date of the original purchase.

The foregoing constitutes R.L. DRAKE HOLDINGS LLC'S entire obligation with respect to this product, and the original purchaser shall have no other remedy and no claim for incidental or consequential damages, losses or expenses. Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusions 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. This warranty shall be construed under the laws of Ohio.

a) the model and serial number, b) the identity of the seller and the approximate date of purchase; and c) A detailed description of the problem, including details on the electrical connection to associated equipment and

the list of such equipment.

3. Deliver the product to R.L. DRAKE HOLDINGS LLC or the nearest authorized service facility, or ship the same in its original container or equivalent, fully insured and shipping charges prepaid.

1. Improper maintenance or repair, including the installation of parts or accessories that do not conform to the

2. Misuse, abuse, neglect or improper installation.

3. Accidental or intentional damage.

12 POSITION RACK MOUNT POWER SUPPLY

4 POSITION

RACK MOUNT

VMM 600/VMM 806 MODULAR

SINGLE-CHANNEL MODULATORS

POWER SUPPLY

SPECIFICATIONS

Frequen cy Range:

Power Level Range: 10 dB continiously adjustable Carrier-to-Noise: 63 dB Broadband Noise: -90 dBc Spurious Outputs: -66 dBc Aural/Visual Carrier Ratio: -11 to - 19 dB

4.5 MHz Aural Inter-carrier Freq. Tolerance: ± 250 Hz; 32 to 122 °F

Frequency Response: 1.0 dB Peak to Valley Peak to Peak Video-to-RMS

Signal-to-Noise Ratio: 65 dB

Differential Phase: 2.0 degree

Differential Gain: 2.0%

VMM600-

VMM806-

Impedance: 75 Ohms Return Loss: 15 dB Power Level: +45 dBmV

Connector: “F” Female

Impedance: 75 Ohms Return Loss: 20 dB

Input Level: 1.0 volt Peak to Peak

Hum Ratio: 64 dB

54-600 MHz. Factory set to one of the following channels: Cable Channels 2-86, 95-99 600-806 MHz. Factory set to one of the following channels: Cable Channels 87-125

VIDEO

C/L Delay: Per FCC Requirements

AUDIO

Input Impedance: Greater than 10k Ohms,

Frequency Range: 50 Hz to 12 kHz Frequency Response: ± 0.5 dB Total Harmonic Distortion: 1% @ 25 kHz deviation Signal-to-Noise Ratio: 70 dB

Operating Temperature:

Specifications subject to change without notice or obligation.

Connector: RCA

Input Level: 0.5 to 4.0 volt peak-to-peak

GENERAL

DC Power Input:

unbalanced

(constant AGC range)

+12 VDC @ 240 mA, +5 VDC @ 35 mA, 0°C to +50°C.

Size:

1"W x 3.5" H x 7.78"D. 11 oz.

Weight:

The R.L. Drake VMM 600/VMM 806 Video Modulator System is a professional quality modular headend system designed to optimize ra ck sp ace. Up to 12 VMM 600 and /or VMM 806 modulators can be racked alongside a single power supply in the Drake 12 position rack mount or up to 4 modulators can be racked in th

e 4 position rack mount. Either model is a high quality, fixed channel heterodyne audio/ video modulator.

The VMM 600 provides a modulated visual and RF carrier output on any single channel

95-99;

Aeronautical channels are offset positive

2-86,

with a tolerance of ±5 kHz as required by FCC rules.

The VMM 806 provides a modulated visual and RF carrier output on any single channel 87-125.

® is a registered trademark of the R.L. Drake Holdings LLC

Printed in China

Th e het ero dyne co nver sio n sys tem , in conjunction with the use of a SAW filter, insu res optim um vesti gial sele ctivi ty for adjacent channels.

The modulators are designed to accept any standard audio/video source such as NTSC video and audio baseband signals from a sate ll ite receiver, T V c am era, vid eo tape recorder, TV demodulator, or similar signal source.

The modulators have Audio AGC that eliminates variations in loudness level that may be present among various program sources.

Th e mo dulators acc ept sta nda rd ( syn c negative) polarity video at a 0.7 to 2.5 Vp-p

l level controls are located on the front

level. Al panel for ease of operation. Output level of +45 dBmV is typical and is adjustable from +30 to +45 dBmV.

Field-defeatable audio pre-emphasis enables passing of BTSC encoded standard baseband ster eo aud io sig na ls.

Rev:120917

INSTALLATION 3

2 FRONT PANEL DESCRIPTION REAR PANEL DESCRIPTION

Figure 3

Figure 1 Figure 2

F1 - AUDIO Level Control

This screwdriver adjustment varies the peak

aural carrier deviation. Clockwis e rotation

increases the c arrier deviation.

F2 - VIDEO Level Control

This screwdriver adjustment varies the video

modula tio n lev el. Clockwise rotation

increases the modulation depth.

F3 - POWER Indicator

Lig hts when the unit is connect ed t o the required source of DC power via the rear panel DC INPUT connector.

F4 - A/V Ratio Control

This screwdriver adjustment varies the level of

the aural carr

ier over a range from 11 to 19 dB below the visual carrier. The aural carrier should be adjusted to approximately 15 dB below the visual carrier (normal operation). Clockwise rotation increases the aural carrier level and thus decreases the A/V ratio.

F5 - "CH#" (Channel)

Th e mo du lat or is fact ory align ed to the channel number indicated.

F6 - RF Output Level

This screwdriver adjustment varies the RF Output level from approximately 35-45 dBmV.

maximum output level is set with the

The

adjustment fully clockwise.

R1 - VIDEO INPUT Connector

This input accepts baseband input thru

4.2 MHz video at levels from 0.7 Vp-p to

1.5 Vp-p.

R2 - AUDIO INPUT Connector

This “RCA” (phono) connector input accepts

baseband audio at a nominal level of 0.5 VPP.

NOTE: two internal jumpers can be configured

to defeat the audio pre-emphasis or stereo

capability. Top cover must be opened to access.

R3 - DC INPUT Connector

This 3-pi n c on ne ctor (Male) accepts the appropriate mating DC power cable. Observe proper orientation and wiring.

R4 - RF OUTPUT Connector

This is the modulator RF output

STEREO MONO

Internal Jumper Settings

PRE-EMPHASIS

DISABLE ENABLE

CONNECTIONS AND CONTROLS

All connections to and from each modulator are made through the rear panel. Figure 3 illustrates an installation with 12 modulator units combined through a passive

signal combiner. Additional channels can be added by using additional VMM 600 or VMM 806 modulators an d ei the r mult i-p ort c ombin ers or combinations of two-port combiners.

INSTALLATION NOTES

Level ad jus tme nt prov ide s opt imu m performance in multi-channel installations. The mo dul ato r outp uts sho uld be c hecked peri od ic al ly with a spectrum ana ly zer to ma int ain a ±1 dB vari ati on of ad jac ent channel carriers.

AUDIO INPUTS

AC POWER

CORD

DC POWER CABLE

VIDEO INPUTS

RF COMBINER

R.L. Drake Holdings LLC

710 Pleasant Valley Drive

Customer Service and Parts Telephone: +1 (937) 746-6990

Fax: +1 (937) 806-1510 www.rldrake.com

Springboro, Ohio 45066

Aural/Visual (A/V) ratios should be held to

-15 dB or less. The output ‘RF’ and ‘A/V (Ratio)’ controls are used respectively to make these adjustments.

RACK MOUNTING

Adequate ventilation is very important in multi-channel installations. Units should be spaced apart by at least one panel height (1.75”) wherever possible, and some air movement is advisable in enclosed rack cabinets. Excessive heat will shorten component life and modulator performance will be degraded without proper cooling.

VMM 600's/VMM 806's

SYSTEM OUT

Drake VMM600 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual