4-40 Service Guide E8364-90026
Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting E8362B, E8363B, E8364B
Node Descriptions, A16 Test Set Motherboard, AUX 2
Node 811 −10 V Reference Node 811 senses the −10 V supply voltage which serves
as a measurement reference.
Node 812 +1.78 V Bias Reference Node 812 senses the +1.78 V bias supply voltage
which serves as a measurement reference.
Node 813 Phase Lock IF Detector Node 813 senses the voltage input to the phase
lock IF detector.
Node 814 +10 V Reference Node 814 senses the +10 V supply voltage which serves
as a measurement reference.
Node 815 −1.25 V Bias Reference Node 815 senses the −1.25 V bias supply voltage
which serves as a measurement reference.
Node 816 +5 V Reference Node 816 senses the +5 V supply voltage which serves as a
measurement reference.
Node 817 Logger Drive Voltage Output Node 817 senses the drive voltage applied
to the source ALC log amp.
Node 818 Detector Voltage Output Node 818 senses the output voltage of the
phase lock IF detector.
Node Descriptions, A9 Fractional-N Synthesizer Board (Option 080 Only)
Node 911 +5 Vdc Supply Voltage Node 911 senses the 5 Vdc supply voltage which
serves as a measurement reference.
Node 912 1.5 to 3.0 GHz VCO Compensation Node 912 senses the average voltage
output level of the 1.5 to 3.0 GHz VCO.
Node 913 1.5 to 3.0 GHz VCO Tune Voltage Node 913 senses the average voltage
input level of the 1.5 to 3.0 GHz VCO.
Node 914 Heterodyne Band ALC Level Node 914 senses the ALC output voltage
which is used to level the heterodyne circuit output for band 1.
Node 915 2.250 GHz VCO Tune Voltage Node 915 senses the average voltage input
level of the 2.250 GHz VCO.
Node 916 Fundamental and Divide-by-2 Band ALC Level Node 916 senses the
ALC output voltage which is used to level the heterodyne circuit output for
bands 2-25.
Node 917 2.250 GHz VCO Compensation Node 917 senses the average voltage
output level of the 2.250 GHz VCO.
Node 918 ALC Level Adjust Node 918 senses the voltage which is used to set the
offset on the heterodyne band ALC.
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