User's Manual

IF Processor Module Interface

Signal Name Backplane Backplane Signal Type Description

IF Processor Pin

Outer loop Mon J19-11A J20-26C Analog Input 0-1.25V Indicates the output power of an external

amplifier. The scale factor of this input is

100% / V

Forward Power J19-13A J20-23C Analog Input 0-1.25V Indicates the output power of the PA. Also

Metering referred to as the internal loop monitor, the

factor of this input is 100% / V

IF Processor J19-17A J20-12C Discrete contact Provides a pull down to indicate that the

Interlock closure input IF processor module is installed. Low

indicates the module is installed

ALC Voltage J19-18A J20-11C Analog input 0-10V Indicates the voltage applied to the pin

attenuator in the ALC.

Mute IF Processor J19-19A J20-10C Discrete open Controls the muste feature in the IF

collector output processpr. Pulling this line low causes the

IF pprocessor to force the pin attenuator

into full attenuation.

Input Fault J19-21A J20-8C Discrete open A low level indicates that the IF is not

collector input present in the IF processor module.

Peak vs Average J19-22A J20-7C Discrete open A low level indicates the the peak vs average

Fault collector output ratio is at a dangerous level

ALC Conditioning J19-23A J20-6C Analog output Provides an adjustment voltage to the ALC

-1 to +1 V circuitry to correct for the frequency

dependance of the peak detector