User manual DRAKE DIGITAL VMM806AG

[. . . ] 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. [. . . ] 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. See also Item F4 for setting the channel number. 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. Required 4. 5 MHz input level is +40 dBmV ±2 dB. 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. See the illustration on this page. A. 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). Clockwise rotation increases the aural carrier level. F7 - RF Output Level This screwdriver adjustment permits decreasing the RF output level a minimum of 15 dB as the control is rotated counterclockwise. Set the control for a +45 dBmV output level . PRE-EMPHASIS / FLAT: B. AUDIO - FLAT AUDIO PRE-EMPHASIS (factory setting) A. AUDIO INPUT CONNECTOR: B. AUDIO INPUT Baseband audio, (factory setting) C. B. AUDIO INPUT 4. 5 MHz modulated carrier C. Figure 3 4 INSTALLATION maintain a ±1 dB variation of adjacent channel carriers. Aural/Visual (A/V) ratios should be held to -15 dB or less. [. . . ] Frequency Response: 40 Hz to 15 kHz, ±2. 0 dB referenced to 75 µSec. 40 Hz to 100 kHz, ±0. 5 dB if pre-emphasis is defeated. 4. 5MHz INPUT (AUDIO INPUT Connector ­ selected by internal jumpers). Input Level: +40 dBmV ±2 dB for -15 dB A/V ratio. [. . . ]