Agilent Technologies E8362B Service Manual page 122

Troubleshooting
Measurement System Troubleshooting
Node Descriptions, A16 Test Set Motherboard, AUX 2
−10 V Reference Node 811 senses the −10 V supply voltage which serves
Node 811
as a measurement reference.
+1.78 V Bias Reference Node 812 senses the +1.78 V bias supply voltage
Node 812
which serves as a measurement reference.
Node 813 Phase Lock IF Detector Node 813 senses the voltage input to the phase
lock IF detector.
+10 V Reference Node 814 senses the +10 V supply voltage which serves
Node 814
as a measurement reference.
−1.25 V Bias Reference Node 815 senses the −1.25 V bias supply voltage
Node 815
which serves as a measurement reference.
+5 V Reference Node 816 senses the +5 V supply voltage which serves as a
Node 816
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)
+5 Vdc Supply Voltage Node 911 senses the 5 Vdc supply voltage which
Node 911
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.
4-40
PNA Series Microwave Network Analyzers
E8362B, E8363B, E8364B
Service Guide E8364-90026