Comtech EF Data HPCST-5000 - Manual (Page 147)

High-Power TWTA Satellite Terminals Controller for Redundant Systems
Rev. 1 6–9
6.2.3 TWTA Setup for Redundant System Operation
Normal redundant system operation is enabled when:
•
Prime power is applied to the TWTAs and the controller
•
Both TWTAs have been set for Local mode (Remote if available)
•
Both TWTAs have been setup prior to entering AUTO mode
•
Both TWTAs are operating normally (non-faulted)
•
Select AUTO mode
Note: Refer to Section 4.1.2 for a description of TWTA operating modes.
6.2.3.1 Remote Controller Mode
In Remote mode, all commands are entered via a remote controller using one of the
controller serial interfaces. In the Automatic mode, the system will automatically switch
when the primary TWTA faults. In the Manual mode, automatic switching is disabled.
The controller displays are active. Refer to Appendix A for remote control procedures.
6.2.3.2 Local Controller Mode
In Local mode, all redundant commands are entered via the controller front panel. Front
panel switches and displays are active. TWTA commands can be entered via the COM2
serial interface of the TWTAs. In the Automatic mode, the system will automatically
switch when the primary TWTA faults. In the Manual mode, automatic switching is
disabled.
6.2.4 Initial Power-On
This section describes the initial power-on procedure. Use this procedure when the
system is initially installed, and whenever major repairs are made to the system. Proceed
as follows:
1. Connect an RF load (capable of dissipating full rated power) to the output
waveguide flange of the waveguide/switch assembly.
WAR N IN G
Never operate the amplifier with an open waveguide. This amplifier
is capable of generating high power microwave radiation, which can
cause bodily harm. Prior to operation of the TWTA, ensure that all
microwave connections are securely fastened. Check that there is no
microwave leakage.