User manual DRAKE DIGITAL VM2862

[. . . ] ® VM2860/VM2862 Commercial Video Modulator (For use in NTSC systems) Instruction Manual ® is a registered trademark of the R. L. Drake Company © Copyright 2003 R. L. Drake Company P/N: 3852471C-2-2003 Printed in the U. S. A. 2 Cautions Statements WARNING: TO PREVENT FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE TO RAIN OR MOISTURE ¡WARNING! RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE POWER SUPPLY COVERS NO USER-SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL An appliance and cart combination should be moved with care. Quick stops, excessive force and uneven surfaces may cause the appliance and cart combination to overturn. [. . . ] The AUDIO LEVEL control should be set to a point where the red LED just remains off (see item F4). F6 - A/V RATIO Control This screwdriver adjustment varies the level of the aural carrier over a range from 12 to 25 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. F7 - EAS ACTIVE Indicator This indicator lights when a signal is present at the EAS input (R2) indicating that the modulator has switched to the EAS signal. F8 - CATV, CATV +100 CHANNEL Switch This two position switch allows selection of the desired operating channel from 02 to 99 (when the switch is in the CATV position) and channels 100 to 135 (when the switch is in the CATV +100 position). See the CHANNEL ASSIGNMENTS section for a list of the corresponding operating frequency, and offset, if any, for each channel number. F9 - CHANNEL Switch These pushwheel switches allow the selection of the desired operating channel from 01 to 135. See the CHANNEL ASSIGNMENTS section for a list of the corresponding operating frequency, and offset, if any, for each channel number. F10 - RF OUTPUT LEVEL Control This screwdriver adjustment varies the RF OUTPUT level. Clockwise rotation increases the level. Rear Panel Controls and Connections R3 R4 R8 5 R10 SAP LEVEL MADE IN THE U. S. A. BY SAP AUDIO IN L ® RF OUTPUT AUDIO IN R VIDEO IN SERIAL # EAS IN SAP OVERMODULATION OF FIRE-REPLACE FUSE AS MARKED AFTER DISCONNECTING UNIT FROM AC LINE. CAUTION:-RISK FUSE . 5 A / 250 V SLO-BLO 115 VAC, 60 Hz 27 WATT ATTENTION: -RISQUE D'INCENIDEREMPLACEZ FUSIBLE DU TYPE INDIQUÉ APRÉS DEBRANCHER DU SECTEUR. R1 R2 R5 R6 R7 R9 Figure 2 - REAR PANEL R1 - RF OUTPUT This is the modulator output, 54 to 864 MHz. R2 - EAS IN Connector Apply a 44 MHz (45. 75 MHz video carrier) signal at 30 dBmV to this input from an EAS IF modulator. Any level above +20 dBmV will activate the auto switching circuitry. R3 - SAP Level * Adjusts the modulation level of the SAP subcarrier. Advance level until indicator R5 just illuminates. R4 - SAP AUDIO IN * Apply the audio program for the SAP audio channel to this input. R5 - SAP OVERMODULATION * Indicates overmodulation of the SAP audio channel. Adjust audio with SAP level control, R3. R6 - AUDIO IN, L/R These are unbalanced audio inputs to the IF circuits. These "RCA" (phono) connector inputs accept baseband through 15 kHz audio at a nominal level of 250 mV RMS (approximately -10 dBu). R7 - VIDEO INPUT ("RCA" type or "F" type) These are used as the baseband input to the IF circuits. Use ONE of these inputs (either the "RCA" or "F" type) which accepts baseband through 4. 2 MHz video at levels from 0. 7 Vp-p to 1. 5 Vp-p. R8 - Fan Vents To ensure proper cooling of the unit, do not block these vents for the cooling fan. [. . . ] DRAKE will make note of any shipping damage upon receipt. You will need to send proof of purchase to receive warranty service. Typically, a copy of the invoice from an R. L. The warranty is for the original owner only and is not transferable. Warranty 11 Warranty Three Year Limited Warranty R. L. [. . . ]