User's Manual Part 2
Frequency Generator /Upconverter Module Interface
Power Amplifier Module Interface
Signal Name Backplane Backplane Signal Type Description
PA Pin
Amplifier Interlock J19-1A J23-1 Discrete Contact Closure Input Provides a pull down to the control and monitor
ing board to indicate the power amplifier module
is installed. Loe indicates the module is installed.
Reflected Power Metering J19-32 J23-7 Analog Input 0-1.25V Indicates the reflected power from the power
amplifier module. The scale factor for the
reflected power meterimg is 100%
Overtemperature Fault J19-31B J25-3 Discrete Contact Closure Input Indicates an overtemperature condition exists in
the power amplifier module. A contact closure
(low) indicates a fault condition exists.
O/P Amplifier Status J19-30B J25-2 Discrete Open Collector Input Indicates the operating status of the O/P amplifier
A pulled down low indicates that current is
flowing in all five transistors in the power
amplifier.
-5V Bias Sense J19-29B J25-1 Analog Input 0 to -6V Indicates voltage level of the -5V bias supply.
There is a 1:1 relationship between this voltage
and the -5V bias supply.
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Signal Name Backplane Backplane Signal Type Description
U/C Pin
External Ref Indicator J19-4A J21-26C Discrete Open Collector Input High indicates prescence of a 10MHz reference
Logic Enable J19-5A J21-25C Discrete CMOS Output Provides a load enable signal to PLL in the freq
synthesizer chip. A transition from low to high
loads data stored into synthesizer latches.
Data J19-6A J21-24C Discrete CMOS Output Provides serial data to the freq synthesizer chip.
Works in conjunction with the clock output to
synchronously transfer data.
Clock J19-7A J21-23C Discrete CMOS Output Provides serial clock to the freq synthesizer chip.
A rising edge on this clock transfers data into the
freq synthesizer chip.
AFC J19-8A J21-22C Analog Input 0-10V Indicates level of AFC in the freq gen upconverter
Freq Gen U/C Interlock J19-9A J21-21C Discrete Contact closure input Provides a pull down to indicate the freq gen
module is installed. Low indicates it is installed.
Unlock Indicate J19-10A J21-8C Discrete Open Collector Input Indicates the freq/upconverter module is locked
on the external or onternal 10Mhz reference. A
low indicates the module is unlocked.