User manual DRAKE DIGITAL VMM806AG

[. . . ] 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. POWER SUPPLY MODULATOR AUDIO POWER SUPPLY MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO MODULATOR AUDIO VMM806AG VIDEO MODULATOR AUDIO MODULATOR AUDIO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO VIDEO POWER PWR A/V PWR A/V PWR A/V PWR A/V PWR A/V PWR A/V PWR A/V PWR A/V PWR ERROR AUDIO A/V VIDEO PWR A/V PWR A/V # CH RF # CH RF # CH RF # CH RF # CH RF # CH RF # CH RF # CH RF # CH # 2 RF CATV CATV +100 BC TV # CH RF RF 5 CH A /V RF 4 POSITION RACK MOUNT OR VMM806AG and other compatible modular units POWER SUPPLY AUDIO AUDIO VIDEO VIDEO AUDIO AUDIO POWER ERROR POWER ERROR VIDEO VMM806AG VMM806AG VMM806AG VMM806AG VIDEO POWER ERROR POWER ERROR BC TV BC TV BC TV 5 A/V 5 A/V 5 A/V 5 BC TV A/V RF RF RF CATV CATV CATV CATV +100 CATV +100 CATV +100 CATV 2 2 2 2 The R. L. [. . . ] Drake Company P/N: 3852416H-12-2003 Printed in U. S. A. CATV +100 RF 2 FRONT PANEL CONTROLS and INDICATORS F1 F2 F3 F4 F5 F6 F7 CATV +100 REAR PANEL CONNECTIONS / INTERNAL JUMPERS R1 3 VMM806AG POWER ERROR AUDIO VIDEO R2 2 CATV 5 BC TV R3 R4 A/V RF Figure 1 F1 - POWER/ERROR Indicator Lights when the unit is connected to the required source of DC power via the rear panel DC INPUT connector. A flashing condition indicates an invalid channel setting or other conditions that would cause the unit to operate on an invalid channel. F2 - AUDIO Level Control The setting of this screwdriver adjustment determines the aural carrier deviation. F3 - VIDEO Level Control The setting of this screwdriver adjustment determines the video modulation level. F4 - Channel Number Switch Sets the desired operating channel for standard CATV channels 02 through 125 or Broadcast TV channels 02 through 69. See also Item F5 which sets the type of channel (CATV or Broadcast TV) and sets the leading "1" for CATV channels 100 through 125. F5 - Mode Switch Sets the type of channel, CATV or Broadcast TV ("BC TV"). The first position of the switch ("+100") sets a leading "1" for CATV channels 100 through 125. For example: Setting for CATV channel "125"For example: Setting for CATV channel "25"R1 - VIDEO INPUT Connector This is the baseband video input to the IF circuits. This input accepts baseband input levels from 0. 6 Vp-p to 1. 5 Vp-p. Figure 2 4. 5 MHz Audio Input: This AUDIO INPUT can also accept a 4. 5 MHz audio modulated carrier by reconfiguring two specified internal jumper settings. Some stereo generators or satellite receivers provide audio output in a 4. 5 MHz audio modulated carrier format. R3 - DC INPUT Connector This 3-pin connector (Male) accepts the appropriate mating DC power cable. R4 - RF OUTPUT Connector This is the modulator output. BC TV 2 CATV CATV +100 5 BC TV 2 CATV CATV +100 5 R2 - AUDIO INPUT Connector This is an unbalanced audio input to the IF circuits. This "RCA" (phono) connector input accepts baseband audio from 100 mVrms to 3 Vrms levels. NOTE: An internally selected test point jumper defeats the audio pre-emphasis for stereo capability. F6 - A/V Ratio Control This screwdriver adjustment varies the level of the aural carrier over a range from 11 to 18 dB below the visual carrier. The aural carrier should be adjusted to approximately 15 dB below the visual carrier (normal operation). F7 - RF Output Level This screwdriver adjustment permits decreasing the RF output level a minimum of 15 dB as the control is rotated counterclockwise. [. . . ] Therefore, new 12 position rack installations with multiple VMM806AG modulators (up to 12) must use the Drake PSM121 (or equivalent) high capacity power supply module (4. 5 A rating @ 5 VDC and 3 A @ 12 VDC). If you are retrofitting a 12 position rack installation and replacing only one of 12 fixed channel modulators with the VMM806AG agile unit, you may continue to use the standard capacity power supply. If more than one VMM806AG unit will be used, the power supply module must be upgraded to the high capacity PSM121, if not already in place. [. . . ]