Comtech EF Data HPCST-5000 - Manual (Page 134)

Controller for Single Thread Systems High-Power TWTA Satellite Terminals
5–6 Rev. 1
Table 5-3. Status Indicator Descriptions
Key
# Nomenclature Type Function
13 POWER ON
indicator Digital status
(LED = Green) When lit, indicates prime power is applied to the TWTA power supply.
14 FTD
indicator Digital status
(LED = Yellow) When lit, indicates TWTA is in Filament Time Delay mode. This is an
automatic cycle. Indicator is OFF when time delay cycle is completed.
15 STAND BY
indictor Digital status
(LED = Yellow) When lit, indicates TWTA ready for online service and high voltage is
OFF.
16 BEAM SELECTED
ON
indicator Digital status:
(LED = Green) When lit, indicates HIGH VOLTAGE ON been selected.
17 HV ON
indicator Digital status
(LED = Green) When lit, indicates high voltage is ON.
18 FAN ON
indicator Digital status
(LED = Green) When lit, indicates TWTA fan is ON. Depending upon the ambient air
temperature, the TWT fan may cycle on and off.
Figure 5 - 5. Status Indicators