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The combiner assembly can also be supplied mounted in the rack/cabinet which houses
the two CMPAs to provide an integrated power-combined CMPA system.
Integral Linearizer
The Integral Linearizer is an input device intended to improve the intermodulation
characteristics of the CPI CMPAs. The unit functions predistort the RF input signal to
compensate for the amplitude and phase non-linearities inherent in the TWT. In most
applications the CMPA can then be operated 3 dB or more higher in output power (i.e.
less back-off) for a given intermodulation ratio.
Remote Control Panels
The Remote Control/Monitor panel is a rack-mountable unit 5.25 inches high that
provides an output RF power meter and all of the remote controls and indicators listed in
this brochure. The panel requires a source of AC power and it does not include the
interconnect cable from the CMPA. The cable requires 24 conductors plus a shielded
pair, and practical wire sizes limit the length to about 1100 feet (335 meters).
Remote control/monitor panels are also available for use with the Switching System and
Phase Combiner.
SUPPORT SERVICES
Documentation
CPI Satcom Division provides a standard commercial documentation package for all
products. The standard package for satellite communications power amplifiers includes a
comprehensive operation and maintenance manual, outline and interface drawings and
acceptance test procedure/report (ATP).
The technical manual provides instruction for unpacking and installation, initial set-up,
calibration, normal operation, maintenance and repair of the equipment. The manual
includes schematic diagrams, block diagrams, and wiring information sufficient for use
by maintenance personnel. Outline and interface drawings provide dimensions and the
location and size of mounting holes, duct work, and waveguide, so that site preparation
can be accomplished prior to receipt of the equipment.
The ATP outlines the tests performed, circuit and test equipment used, and limits
established. Space is provided for recording and certifying the test results, consolidating
all related information in one document. The spare parts documentation package consists
of a commercial recommended spare parts list to support the equipment for a one-to-two
year period of operation.
Ku-Band CMPA 04/08
TD-67 Page 14