User manual DRAKE DIGITAL MPM860AG

[. . . ] 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. [. . . ] Note that the output of the MPM860AG is related to the input signal's stability and level. A nominal input level of +10 dBmV ± 3 dB is desired at CH3 or CH4. The front panel gain control on the MPM860AG can then be adjusted to obtain a +45 dBmV output level. The MPM860AG is linear and if the input level is changed, the MPM output level will follow. The R. L. Drake MPM860AG is a miniature analog double conversion heterodyne channel processor designed specifically to accept a channel 3 or channel 4 RF input from a typical consumer CH3/4 NTSC modulator. The input signal can be either double sideband as typical for such a modulator, or vestigial sideband modulated. The MPM860AG contains SAW filtering to insure that the output of the MPM860AG is a vestigial sideband output for use in a 6 MHz wide channel environment. Adjacent output channels are allowed. ® is a registered trademark of the R. L. Drake Company © Copyright 2010 R. L. Drake Company P/N: 3852548 Rev A-08-2010 CATV +100 GAIN 2 2 2 2 2 FRONT PANEL CONTROLS and INDICATORS MPM860AG MPM860AG REAR PANEL CONNECTIONS / INTERNAL JUMPERS R1 3 F1 POWER/ ERROR CHANNEL 3/4 IN F2 CATV +100 R2 R3 2 5 CH 4 CH 3 +5 V +12 V GND DC INPUT CATV BCTV R4 RF OUT F3 F4 GAIN MPM860AG 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. The RF output is switched off for flashing (ERROR) conditions. F2 - Channel Select Switch Sets the desired operating channel for standard CATV channels 02 through 135 or Broadcast TV channels 02 through 69. See also Item F3 which sets the type of channel (CATV or Broadcast TV) and sets the leading "1" for CATV channels 100 through 135. F3 - 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 135. See also Item F4 for setting the channel. Here are two examples: Setting for CATV channel "125"2 5 Figure 2 R1 - CH 3 / CH 4 INPUT +5 dBmV RF input. [. . . ] FREQUENCY CHART The chart on the following page shows the standard CATV channel coverage. Where an offset is indicated, this amount of positive frequency offset is added to the frequency indicated in the middle column. As shown, this occurs only on channels required to be offset by the FCC. [. . . ]