Comtech EF Data XPA-200 - Manual (Page 30)

XPA200-7984-I-OPT1, X-Band SSPA Installation
XPA200-7984-I-OPT1, Rev.2 2-2
exhausted out the rear panel. Locate the unit so the input and
output airflow paths are not obstructed or restricted. This will
minimize the amplifier operating temperature, and provide years of
reliable operation.
If the SSPA is to be mounted on slides, the slides must be the
COMTECH rack slides provided with the SSPA. Mount the slides on the
sides of the SSPA chassis with the mounting hardware provided.
Then, install the slide rails in the rack cabinet enclosure.
Secure the SSPA to the rack cabinet with four screws inserted
through the SSPA front panel slotted holes.
2.2.2 Combined/Redundant Amplifier Installation and Cabling
For the complete combined/redundant amplifier system, it is
most common to install the Mitec 2723B combiner in the top position
of the rack, followed by SSPA B, with SSPA A in the bottom position.
(See the outline drawing at the end of this section.)
Connect the Comtech supplied inter-unit control cable,
CA/8981, between the Mitec Combiner ports P1,P2,P3 and to each J5 of
SSPA A and SSPA B as indicated by the labels on the cable. (Note
that this cable is setup for the bottom SSPA be SSPA A.)
Attach the supplied waveguide termination to the load port of
the Mitec 2723B such that the termination resides above the unit.
(See outline drawing.)
Attach user supplied coaxial cables and waveguide between the
Mitec 2723B and each XPA200. Refer to Figure 2.3 of the Mitec
manual. A waveguide pressure window has also been supplied and can
be attached according to customer preference.
(Note that CA/8981 has been constructed for SSPA A to be in the
bottom position. The coaxial cables and waveguides should be
connected accordingly. In case of conflict, it will be necessary to
modify either CA/8981 or the coaxial cables and waveguides.)
CAUTION!
Before applying AC power to the units, make sure the waveguide
output of the amplifiers and the antenna and load ports of the
combiner are properly terminated. Failure to do so could lead to
equipment damage and excessive RF radiation levels.
Attach power cords to the units. Two standard power cords are
supplied with the Mitec 2723B. Each XPA200 is supplied with a
mating connector to enable the user to fabricate a power cord. See
sections 1.4 and 1.11.4.