Comtech EF Data KST-2000A/B - Manual (Page 39)

Ku-Band Satellite Transceiver Revision 9
Installation MN/KST2000AB.IOM
2–11
Table 2-6. HPA Connector (J8) Pin Assignments (TWTA Connection)
Pin Signal Description
A HV_EN High voltage enable, open collector output, active
low
B HTR_STB
Y
Heater standby, open collector output, active low
C FLT_RST Fault reset, open collector output, active low
D HPA_IN1 Input from TWTA, heater timer complete, active low
E HPA_IN2 Input from TWTA, TWT temperature fault, active low
F HPA_IN3 Input from TWTA, high voltage on, active low
G HPA_IN4 Input from TWTA, summary fault, active low
H GND Status/control return
J ANA_IN Analog input from TWTA (0 to +10VDC)
K GND Analog signal return
2.4.1.10 REF IN Connector (J9)
The REF IN connector (J9) allows the user to operate the system with an external
reference instead of the built-in system reference. An external signal of 5 or 10 MHz,
at +6 dBm minimum, may be applied to the 50
Ω, Type N, female connector.