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DRAKE VM2050 Instruction Manual

Commercial video modulator
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®
VM2050/VM2551
Commercial Video Modulator
(For use in NTSC systems)
Instruction Manual
VM SERIES VIDEO MODULATOR
® is a registered trademark of the R.L. Drake Holdings LLC
Printed in China.
© Copyright 2015 R.L. Drake Holdings LLC
P/N: 651232400B
Rev: 20151111
1002412A/1002423A

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Summary of Contents for DRAKE VM2050

  • Page 1 VM2050/VM2551 Commercial Video Modulator (For use in NTSC systems) Instruction Manual VM SERIES VIDEO MODULATOR ® is a registered trademark of the R.L. Drake Holdings LLC Printed in China. © Copyright 2015 R.L. Drake Holdings LLC P/N: 651232400B Rev: 20151111...

  • Page 2: Important Safety Instructions

    Important Safety Instructions 1. Read Instructions—All the safety and operating instructions should be read before 14. Outdoor Antenna Grounding—If an outside antenna or cable system is connect- the product is operated. ed to the product, be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built-up static charges.
  • Page 3 Importantes De Sécurité 1. Lire les directives—Toutes les directives de sécurité et d’utilisation devraient être l’unité de décharge d’antenne, le raccordement aux électrodes de mise à la terre et les lues avant de mettre l’appareil en opération. spécifications pour les électrodes de mise à la terre. 2.
  • Page 4 A high quality IF SAW filter with FCC predistortion eliminates adjacent channel interference and provides optimum delay characteristics. The R.L Drake VM2050 and VM2550 Video Modulators are high quality, vestigial sideband units with synthesized visual and aural carriers. They are designed to accept A manual or auto-switching alternate IF input, labeled EAS input, is provided for NTSC video and audio baseband signals from a satellite receiver or similar equipment.
  • Page 5 Front and Rear Panel Controls and Indicators Operating Controls All operating controls and indicators for the modulator are located on, or are accesible from the front panel. [11] [12] Figure 1 - Front Panel [1] [6] [5] [4] [3] [2] [1] EAS/ALT INDICATOR: Lights Red when EAS/ALT is active.
  • Page 6 Operation Opera n VM2050 (only) Subchannel display in standard Display Mode This bu on scrolls through the selec of Channel, Channel Configura Output Level mode in this order. The res g state (default) of the modulator’s display mode is the channel number.
  • Page 7 Adjustments Adjustments VIDEO LEVEL: With the intended signal source connected and a representa ve video program present turn the Video Level Adjust control clockwise un the Video Overmodula light just flashes, then back off slightly. Alterna vely, while watching the picture on a good TV monitor, adjust the control to the highest (clockwise) level that does NOT cause the highlights (white por of the picture) to become “washed out”.
  • Page 8 Channel Assignments TABLE 1: CATV Sub Band Channels EIA CH# / Visual Carrier Output Channel Frequency (MHz) Switch Setting Channel Standard Video 73.25 72.00 54.00 55.25 61.25 60.00 67.25 79.25 66.00 85.25 78.00 77.25 83.25 84.00 175.25 174.00 181.25 180.00 187.25 186.00 193.25...
  • Page 9 Channel Assignments, continued TABLE 2: BROADCAST TV UHF BROADCAST CHANNELS UHF BROADCAST CHANNELS UHF BROADCAST CHANNELS UHF BROADCAST CHANNELS UHF BROADCAST CHANNELS VHF BROADCAST CHANNELS VHF BROADCAST CHANNELS VHF BROADCAST CHANNELS VHF BROADCAST CHANNELS VHF BROADCAST CHANNELS Visual Carrier Visual Carrier Channel Number Channel Number Frequency (MHz)
  • Page 10 Please perform whatever steps are applicable from the product’s Instruction Manual before calling or writing as this could save unnecessary phone charges. Please do not return the product without calling Drake Service and following the steps above first;...
  • Page 11 Seller upon request. Copies of the limited warranties covering third-party proprietary sub-assembly modules and private-label products manufactured by third-parties may also be available from Seller on request. (Rev 0713) R.L. DRAKE HOLDINGS Sales: 937-746-4556 • Support: 937-746-6990 • Fax: 937-806-1510...
  • Page 12 R.L. Drake Holdings LLC 710 Pleasant Valley Drive Springboro, Ohio 45066 Customer Service and Parts Telephone: +1 (937) 746-6990 Telefax: +1 (937) 806-1510 World Wide Web Site: http://www.rldrake.com...

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