User manual DRAKE DIGITAL VMM 860

[. . . ] DRAKE COMPANY determines is due to: (1) Improper maintenance or repair, including the installation of parts or accessories that do not conform to the quality and specifications of the original parts. (2) Misuse, abuse, neglect or improper installation. All implied warranties, if any, including warranties of merchantability and fitness for a particular purpose, terminate three (3) years from the date of the original purchase. DRAKE COMPANY'S entire obligation with respect to this product, and the original purchaser shall have no other remedy and no claim for incidental or consequential damages, losses or expenses. [. . . ] Frequency Response: 40 Hz to 15 kHz, +1. 0 dB referenced to 75 µS pre-emphasis curve. (40 Hz-100 kHz ±0. 5 dB if pre-emphasis is defeated). 4. 5 MHz Intercarrier Stability: +50 Hz, frequency synthesized. Total Harmonic Distortion: 0. 5% Maximum. Hum and Noise: -65 dB minimum, referenced to 25 kHz peak deviation. GENERAL DC Power Input: +12 VDC @ 150 to 220 mA, channel dependent. Operating Temperature: +5 VDC @ 75 to 100 mA, channel dependant. Weight: 1"W x 3. 5" H x 7. 5"D. Specifications subject to change without notice or obligation. The R. L. Drake VMM 600/VMM 860 Video Modulator System is a professional quality modular headend system designed to optimize rack space. Up to 12 VMM 600 and/or VMM 860 modulators can be racked alongside a single power supply in the Drake 12 position rack mount or up to 4 modulators can be racked in the 4 position rack mount. Either model is a high quality, fixed channel heterodyne audio/ video modulator. The VMM 600 provides a modulated visual and RF carrier output on any single VHF channel 2-13; Lowband channel A8; Midband channel A-I and A5-A1; Superband channel J-W; Hyperband channel AA-ZZ and AAA-XXX (CATV 63-86) or UHF channel 14-35. Aeronautical channels are offset positive with a tolerance of ±5 kHz as required by FCC rules. The VMM 860 provides a modulated visual and RF carrier output on any single Hyperband channel 87-135 or UHF channel 36-69. The heterodyne conversion system, in conjunction with the use of a SAW filter, insures optimum vestigial selectivity for adjacent channel headends. The modulators are designed to accept any standard audio/video source such as NTSC video and audio baseband signals from a satellite receiver, TV camera, videotape recorder, TV demodulator, or similar signal source. The modulators accept standard (sync negative) polarity video at a 0. 7 to 2. 5 Vp-p level. All level controls are located on the front panel for ease of operation. Output level of +45 dBmV is typical and is adjustable from +30 to +45 dBmV. Field-defeatable audio pre-emphasis enables passing of BTSC encoded standard baseband stereo audio signals. The Drake model MMTS20 stereo encoder may be used with the VMM when stereo audio is required. ® is a registered trademark of the R. L. Drake Company © Copyright 2005 R. L. [. . . ] This input accepts baseband input thru 4. 2 MHz video at levels from 0. 7 Vp-p to 1. 5 Vp-p. R2 - AUDIO INPUT Connector This is an unbalanced audio input to the IF circuits. This "RCA" (phono) connector input accepts baseband thru 15 kHz audio at a nominal level of 250 mV RMS (approximately 0 dBm). NOTE: An externally accessible test point jumper defeats the audio pre-emphasis for stereo capability. [. . . ]