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Instruction Manual

is a registered trademark of the R.L. Drake Company

© Copyright 2005 R.L. Drake Company P/N: 3852551B-12-2005

VM2551

Commercial Video Modulator

(For use in NTSC systems)

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Summary of Contents for VM2551

Page 1: ...Instruction Manual is a registered trademark of the R L Drake Company Copyright 2005 R L Drake Company P N 3852551B 12 2005 VM2551 Commercial Video Modulator For use in NTSC systems...

Page 2: ...y purpose of the polarized plug Alternate Warnings If this product is equipped with a three wire grounding type plug a plug having a third grounding pin the plug will only fit into a grounding type po...

Page 3: ...can can be inserted via the rear panel 4 5 MHz input These features combined with a carefully designed low intermodulation output stage provide reliable operation in a densely crowded SMATV or cable e...

Page 4: ...range from 12 to 18 dB below the visual carrier The aural carrier should be adjusted to approximately 15 dB below the visual carrier normal operation F2 F3 AUDIO LEVEL Control Audio Overmodulation LE...

Page 5: ...rrier output level is 40 dBmV R4 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 R5 AUDI...

Page 6: ...switch SW2 Set switch SW2 to the Pre emphasis OFF position The factory default setting is Pre emphasis ON for mono operation CONNECTIONS AND CONTROLS All connections to and from the VM2551 are made th...

Page 7: ...ance Pre emphasis Frequency Response Total Harmonic Distortion Hum and Noise 4 5 MHz INPUT Internal Jumper Change to Activate Input Level COMPOSITEIF LOOP IF Frequency Loop Level Loop Impedance GENERA...

Page 8: ...be on file at R L DRAKE you will need to send proof of purchase to receive warranty service Typically a copy of the invoice from an R L DRAKE dealer will suffice The warranty is for the original owner...

Page 9: ...enance repair anduseareimportanttoobtainproperperformancefromthisproduct Thereforecarefully readtheInstructionManual ThiswarrantydoesnotapplytoanydefectthatR L DRAKECOMPANYdeterminesisdue to 1 Imprope...

Page 10: ...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 com...

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