8-14
Service Guide E8364-90026
General Purpose Maintenance Procedures
PNA Series Microwave Network Analyzers
Error Terms
E8362B, E8363B, E8364B
Isolation (E
XF
and E
XR
)
Isolation, or crosstalk, is the uncorrected forward and reverse isolation error terms that
represent leakage between the test ports and the signal paths. The isolation error terms
are characterized by measuring transmission (S
21
, S
12
) with loads attached to both ports
during the measurement calibration.isolation errors affect transmission measurements
primarily where the measured signal level is very low.
The measurements most affected by isolation error terms are DUTs with large insertion
loss. Since these terms are low in magnitude, they are usually noisy (not very repeatable).
Typical Cause of Failure
A
loose cable connection or leakage between components
in the
test set are the most likely cause of isolation problems.
After verifying the cable and its connections, suspect the analyzer
switch splitter, step
attenuator, coupler, or receivers, and associated cabling
.
To troubleshoot, refer to
“Checking the Receiver Group” on page 4-52
or to
Summary of Contents for E8362B
Page 11: ...Service Guide E8364 90026 1 1 1 Safety and Regulatory Information ...
Page 19: ...Service Guide E8364 90026 2 1 2 General Product Information ...
Page 33: ...Service Guide E8364 90026 3 1 3 Tests and Adjustments ...
Page 83: ...Service Guide E8364 90026 4 1 4 Troubleshooting ...
Page 151: ...Service Guide E8364 90026 5 1 5 Theory of Operation ...
Page 185: ...Service Guide E8364 90026 6 1 6 Replaceable Parts ...
Page 269: ...Service Guide E8364 90026 7 1 7 Repair and Replacement Procedures ...
Page 351: ...Service Guide E8364 90026 8 1 8 General Purpose Maintenance Procedures ...