Comtech EF Data HPCST-5000 - Manual (Page 161)

High-Power TWTA Satellite Terminals Programming Guide for Redundant Controller
Rev. 1 A–13
A.3.2 Controller Control Commands
The redundant system control commands are listed in Table A-6.
Table A-6. Redundant System Controller Control Commands
ASCII Description
6 Manual/Automatic. When the controller is set for REMOTE mode, configures controller for manual or
automatic mode.
Input: 1 byte of data.
<0> Sets controller for manual mode
<1> Sets controller for automatic mode
7 RF Disable/Enable. Disables or enables RF chain of all TWTAs connected to the controller.
Input: 1 byte of data.
<0> Disables RF chain
<1> Enables RF chain
9 Fault reset command. Resets TWTA resetable faults of all TWTAs connected to the controller.
Input: No data required.
B Waveguide position. Repositions a selected waveguide switch as follows:
Input: 2 bytes of data.
<1A> Selects waveguide switch “1” position “A”
<1B> Selects waveguide switch “1” position “B”
<2A> Selects waveguide switch “2” position “A”
<2B> Selects waveguide switch “2” position “B”
<3A> Selects waveguide switch “3” position “A”
<3B> Selects waveguide switch “3” position “B”
<4A> Selects waveguide switch “4” position “A”
<4B> Selects waveguide switch “4” position “B”
Note: During the waveguide switch repositioning cycle, RF output is momentarily inhibited.
D Transfer switch position. Repositions selected transfer switch as follows.
Input: 2 bytes of data.
<1A> Selects transfer switch “1” position “A”
<1B> Selects transfer switch “1” position “B”
<2A> Selects transfer switch “2” position “A”
<2B> Selects transfer switch “2” position “B”
E Hot/Warm Standby. Sets TWTA’s high voltage status of offline (backup) TWTA(s). In WARM standby, the
high voltage of the offline TWTA(s) is OFF. When the primary TWTA faults, the high voltage of a backup
TWTA is activated before the waveguide switch sets the faulted TWTA offline and the backup unit online.
In HOT Standby, the high voltage of the unfaulted offline TWTA(s) is always ON.
Input: 1 byte of data.
<0> Hot Standby
<1> Warm Standby