Comtech EF Data HPCST-5000 - Manual (Page 158)

Programming Guide for Redundant Controller High-Power TWTA Satellite Terminals
A–10 Rev. 1
A.3 Redundant System Command Set
This section presents the commands used for remote control of redundant systems
(command byte portion of the command message). Commands sent to the system
controller are either “query” or “control” commands.
Note: Refer to Section A.4 for TWTA commands which are different from those used
for control of the redundant system controller.
Controller Query commands (Table A-5) elicit information such as controller ID or
controller status. These commands are executed independent of whether the system
controller is set for REMOTE or LOCAL mode.
Controller Control commands (Table A-6) initiate an action such as waveguide switch
position changes or UPS Enable. These commands are only executed when the system
controller is in the REMOTE mode.
In a redundant system, TWTA commands are routed to the TWTAs by the controller.
Make sure that the right command set is used when programming the system. Use the
commands of this section to program the redundant system controller and the commands
of Section A.4 to program the TWTAs included in the redundant system. Refer to
Section A.2 for a discussion of the command messages sent to the controller and how
TWTA commands are embedded in the controller command messages.