TM 300VMF+ Commercial Video Modulator (For use in NTSC systems) Instruction Manual TM is a trademark of the R.L. Drake Company © Copyright 2005 R.L.
Caution Statements IMPORTANT SAFEGUARDS This symbol is intended to alert the user to the presence of non-insulated "dangerous voltage" within the product's enclosure, that may be of sufficient magnitude to constitute a risk of electric shock to persons. This symbol is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
Table of Contents/Description/Specifications 3 TABLE OF CONTENTS 2 2 3 3 4 Caution Statements Important Safety Instructions Table of Contents / General Description Specifications Front Panel Controls, Indicators, and Connections 5 6 7 8 9 Rear Panel Connections and Internal Jumper Installation Frequency Allocation Charts Service / If You Need To Call For Help Warranty DESCRIPTION The DRACOM 300VMF+ Video Modulator is a vestigial sideband heterodyne audio/video modulator that provides a modulated vis
Front Panel Description F1 F2 F3 F4 F5 F6 F7 Figure 1 F1 - POWER Indicator Lights when the unit is connected to a source of AC power. F2 - OUTPUT TEST Connector Provides a reduced level sample of the RF output signal. The level at this connector is approximately 30 dB lower in level than the RF OUTPUT signal. It is used to monitor the active signal without affecting the level or quality of the RF output signal.
Rear Panel Description and Internal Jumper VIDEO INPUT AUDIO INPUT 120V AC 60Hz 610W R.F. OUTPUT R. L. DRAKE COMPANY FRANKLIN, OH 600W MAX R1 R2 R3 5 R4 MADE IN TAIWAN R5 Figure 2 R1 - VIDEO INPUT Connector This is the baseband video input to the IF circuits. This input accepts baseband through 4.2 MHz video at levels from 0.7 Vp-p to 1.5 Vp-p. R4 - AC OUTLET Receptacle This is a power receptacle for other equipment and is rated at 600 W maximum; 120 V, 5 Amp.
Installation CONNECTIONS AND CONTROLS All connections to and from the 300VMF+ are made through the rear panel. Figure 4 shows a typical two channel installation using a typical satellite receiver as a signal source. Additional channels can be added by using additional 300VMF+ modulators and either multi-port combiners or combinations of two-port combiners. The 'RF Output Level' and 'A/V Ratio' controls are used respectively to make these adjustments.
Frequency Allocation Charts Table 1 7 CHANNEL ASSIGNMENTS EIA Channel Visual Carrier MHz Offset kHz EIA Channel Visual Carrier MHz Offset kHz 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 55.25 61.25 67.25 77.25 83.25 175.25 181.25 187.25 193.25 199.25 205.25 211.25 121.25 127.25 133.25 139.25 145.25 151.25 157.25 163.25 169.25 217.25 223.25 229.25 235.25 241.25 247.25 253.25 259.25 265.25 271.25 277.25 283.25 289.
Service / If You Need To Call For Help SERVICE INFORMATION You may contact the R.L. DRAKE Service Department for additional information or assistance by calling +1 (937) 746-6990, Monday through Friday, between 8:00 A.M. and 4:00 P.M. Eastern Time, except on holidays. You may also contact the R.L. DRAKE Service Department by E-mail at the following address: Techsupport@rldrake.com or by Telefax: +1 (937) 806-1576.
Warranty Warranty9 One Year Limited Warranty R. L. DRAKE COMPANY warrants to the original purchaser this product shall be free from defects in material or workmanship for one (1) year from the date of original purchase. During the warranty period the R. L. DRAKE COMPANY 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 COMPANY may replace a defective unit.
R.L. Drake Company 230 Industrial Drive Franklin, Ohio 45005 U.S.A. Customer Service and Parts Telephone: +1 (937) 746-6990 Telefax: +1 (937) 806-1576 World Wide Web Site: http://www.rldrake.
