Comtech EF Data HPCST-5000 - Manual (Page 145)

High-Power TWTA Satellite Terminals Controller for Redundant Systems
Rev. 1 6–7
6.2.2.1.4 HV ON Push Button Switch
There is an HV ON switch for each TWTA in the system. This switch can be used to set
up the hot-standby mode of operation (Table 6-4). There are two indicators associated
with this switch. The selected indicator lights when the HV ON button is pressed. The
TWTA Status indicator glows green when the high voltage of the TWTA is ON. This
switch can also be used to turn off the high voltage of the TWTA controlled by the
switch
Table Chapter 6-4. HV ON Push Button Switch
Indicator Color Status
TWTA “A” HV ON Selected
Indicator Green TWTA “A” high-voltage is ON
TWTA “B” HV ON Selected
Indicator Green TWTA “B high-voltage is ON
TWTA “A” Status Indicator 1. Dark
2. Blinking
Amber
3. Steady Amber
4. Green
5. Red
1. Serial interface not functional
2. FTD cycle in process
3. Standby
4. High Voltage ON
5. TWTA fault
TWTA “B” Status Indicator 1. Dark
2. Green
3. Red
1. High voltage is OFF and the unit is not
faulted.
2. High voltage is ON
3. TWTA faulted