Comtech EF Data HPCST-5000 - Manual (Page 135)

High-Power TWTA Satellite Terminals Controller for Single Thread Systems
Rev. 1 5–7
Table 5-4. HPC-1200 Local Control Descriptions
Key
# Nomenclature Type Function
19 REMOTE/LOCAL
control switch Toggle switch When set to LOCAL, the HPC-1200 front is used to operate the TWTA.
When set to REMOTE, the TWTA is operated from the remote controller.
During REMOTE control operation:
•
The HPC-1200 HIGH VOLTAGE ON/OFF switch is disabled.
•
The AC POWER ON/OFF, LAMP TEST, and REMOTE/LOCAL
switch functions of HPC-1200 remain active
•
All HPC-1200 front panel status indicators and monitor points
remain active.
20 HEATER
STANDBY
control switch Toggle switch When ON (Up), sets TWT filament (heater) voltage to TWT extended life
mode. This function available for LOCAL and REMOTE control
operation.
21 HV ON/OFF
control switch Momentary toggle
switch Used to set HV (Beam) ON or OFF. Controls high voltage circuit. Beam
ON enables TWT RF amplification.
22 AC POWER
ON/OFF
control switch Locking toggle
switch Enables/disables TWTA operation. (Does not affect prime power
connection to TWTA.) Pull toggle away from front panel (out) to
disengage latch and move the toggle to the UP (ON = enabled) or DOWN
position (OFF = disabled).
Figure 5 - 6. HPC-1200 Local Controls