Comtech EF Data HPCST-5000 - Manual (Page 202)

External Connections High-Power C-Band Satellite Terminal
2–8 Rev. 0
2.1.2.1 RF Input (J1)
The RF Input is an N-type connector that receives the signal from the RF TX output of
the RFT. The input impedance is 50
!.
The input frequency range is from 5.845 to 6.425 GHz.
The input level should be set to give the required signal at J7, RF Output.
2.1.2.2 Gain Control (J2)
The potentiometer located under the cover is used to set nominal system gain.
Adjustment range is 6 dB minimum.
Note: Gain Control shall be covered with a sealed metal cover and secured with screws
and washers.
2.1.2.3 Discrete Interface (J3)
The SSPA is controlled using a discrete interface. Control commands to the SSPA are
collected from the monitor and control system of the RFT-500. The following table lists
the dedicated pin outs for the 26-pin monitor and control connector of the SSPA.
Type Pin Function
Control Command H RF Enable (see Note 1)
R System Common (see Note 1)
Status Command D Summary Fault (Open on Fault) (see Note 2)
C Thermistor Output (see Note 3)
E Future
G Status Common