Comtech EF Data XTD-750C-B1 Operation And Installation Manual page 146

Rack Mount Amplifiers
MNC-0000-041
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Refer to Figure 36 through Figure 38.
If you are setting up rack mount amplifiers, you may either
perform the ODU Amplifier setup procedure, or you may use the
schematic that appears on the front panel showing the
waveguide configuration of the redundant system.
Looking at the front panel of an amplifier, the top amplifier is
"this" amplifier, the one you are looking at. The bottom amplifier
is the other amplifier. The top waveguide switch and the
left-most waveguide switch, are switch 1. The bottom switch and
right-most switch are switch 2.
Pressing the button to the right of each switch will cause the
switch to change to its other position.
When an amplifier is set for redundant mode operation
the RS-232 port no longer functions as a control
interface. Only the RS-485 port may be used as the
control interface.
32 of 34
Operation Addendum, HPA Control Utility
Note
Revision A