Comtech EF Data HPCST-5000 - Manual (Page 69)

High-Power TWTA Satellite Terminals Single Thread System Installation
Rev.1 2–23
2.3.4.1.3 Analog Status Circuits
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Helix Current (Pin D).
The TWT helix current may be determined by monitoring the voltage in Pin D.
There is 2 mA of current for each volt measured.
•
High Voltage Monitor (Pin L).
The high voltage level may be determined by monitoring the voltage in Pin L.
This output is proportional to the high voltage (1V/1000 VDC).
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Analog Signal Return (Pin N).
Common return.
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TWT Temperature (Pin P).
The TWT’s collector temperature may be determined by monitoring the voltage
on Pin P and referring to the chart in Figure Chapter 2-5.
Figure Chapter 2-5. TWT Temperature: Temperature vs. Voltage