Comtech EF Data SDM-650B - Manual (Page 253)

Rev. 5 E–1
Appendix E.
AGC INTERFACE
The AGC interface option has been designed for external monitoring of the dynamic
range of a modem.
The AGC interface output will be 0V out for minimum modem power, and +10V out for
maximum modem power.
Rear panel gain and offset adjustments allow fine tuning of these voltages.
The AGC interface output is approximately linear, making it easy to determine the input
power to the modem.
The demodulator fault relay closure can be used as an indication of the validity of the
AGC voltage. If a fault is indicated, the AGC voltage is not valid.
Refer to Figure E-1 for a diagram of the rear panel showing the location of the AGC
connector.