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DRAKE MPM860AG User Manual

Channel 3 or 4 agile processor
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MPM860AG Channel 3 or 4 Agile Processor

DRAKE RMM12 - 12 SLOT RACK MOUNT CHASSIS
RMM4A - 4 SLOT RACK MOUNT CHASSIS (WITH BUILT-IN POWER)
The MPM860AG mini processing module is a
member of the R.L. Drake 19" Mini-Rack Series,
a professional quality modular headend system
designed to optimize rack space. An assortment
of up to twelve (12) modular units, such as the
VMM Series of fixed channel and agile channel
modulators, the MPM860AG, or compatible
audio/video products can be racked alongside a
single power supply (Drake model PSM121 - 12
Unit Power Supply) in the Drake model RMM12
(12 Slot Rack Mount Chassis). The Drake RMM4A
Rack Mount Chassis (with Built-In Power Supply)
accepts up to four (4) modular units.
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
grade 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.
MPM860AG Channel 3 or 4 Agile Processor
The frequency agile MPM860AG allows front panel
push-wheel switch selection of standard CATV
channels 2 though 135, or VHF/UHF TV channels 2
through 69. Aeronautical channels are offset per
FCC requirements. Internal jumpers permit set-up
for HRC or IRC CATV channel plans as well.
The heterodyne conversion system, in conjunction
with the use of a SAW filter, ensures optimum
vestigial selectivity for adjacent channel headends.
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 MPM860AG's output
level will follow.
DRAKE PSM121 - POWER SUPPLY
MPM860AG
BUILT-IN POWER SUPPLY
1
1

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Summary of Contents for DRAKE MPM860AG

  • Page 1 (12 Slot Rack Mount Chassis). The Drake RMM4A Rack Mount Chassis (with Built-In Power Supply) Note that the output of the MPM860AG is related accepts up to four (4) modular units. to the input signal’s stability and level. A nominal input level of +10 dBmV ±...
  • Page 2 Sets the type of channel, CATV or Broadcast TV (BCTV). The first position of the switch (+100) sets a The MPM860AG is linear and if the input level is changed, the MPM860AG’s output level will follow. leading “1” for CATV channels 100 through 135. See...
  • Page 3 Rear Panel Connections / Internal Jumpers Rear Panel Connections / Internal Jumpers MPM860AG (Rear) CHANNEL 3/4 IN CH 4 CH 3 +12V DC INPUT RF OUT Figure 2 R1 - CH 3 / CH 4 INPUT R3 - DC INPUT Connector +5 dBmV RF input.
  • Page 4 Likewise, an RMM12 can hold up to twelve (12) analyzer or appropriate meter to insure that Drake Mini Mod Series models as well as a single output levels are properly set. PSM121 Mini Mod Series Power Supply.
  • Page 5 CATV Channel Output Frequencies CATV Channel Output Frequencies TABLE 1: CATV CATV CATV CATV CATV +100 +100 Output Channel Visual Carrier Frequency Output Channel Visual Carrier Frequency pply. A Switch Setting Frequency (MHz) Offset (kHz) Switch Setting Frequency (MHz) Offset (kHz) ) units 55.25 NONE...
  • Page 6 Broadcast TV Channel Output Frequencies Broadcast TV Channel Output Frequencies TABLE 2: CATV CATV BCTV CATV CATV +100 +100 VHF BROADCAST CHANNELS UHF BROADCAST CHANNELS Channel Visual Carrier Channel Visual Carrier Number Frequency (MHz) Number Frequency (MHz) 55.25 471.25 477.25 61.25 483.25 67.25...
  • Page 7 Within 2 dB Output Level Note: The output level of the MPM860AG is intended to be set at or very near +45 dBmV. The front panel GAIN control adjusts the input level into the conversion circuitry and not the final output attenuation.
  • Page 8 Warranty THREE YEAR LIMITED WARRANTY R.L. DRAKE HOLDINGS, LLC warrants to the original purchaser that this product shall be free from defects in material or workmanship for three (3) years from the date of original purchase. During the warranty period, R.L. DRAKE HOLDINGS, LLC, or an authorized Drake service facility, will provide, free of charge, both parts and labor necessary to correct defects in material and workmanship.

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