A-10
Service Guide E8364-90001
Error Terms
PNA Series Microwave Network Analyzers
Error Term Data
E8362A, E8363A, E8364A
Directivity (E
DF
and E
DR
)
E
DF
and E
DR
are the uncorrected forward and reverse directivity error terms of the system.
The directivity error of the test port is determined by measuring the S
11
and S
22
reflection
of the calibration kit load. The load has a much better return loss specification than does
the uncorrected test port. Therefore, any power detected from this measurement is
assumed to be from directivity error.
The measurements most affected by directivity errors are measurements of low reflection
devices.
Typical Cause of Failure
The
calibration kit load
is the most common cause of directivity specification failure.
If the load has been gaged and its performance independently verified, suspect the
analyzer
test port coupler
.
To troubleshoot, refer to
“Checking the Signal Separation Group” on page 4-46
Figure A-3 Typical E
DF
/E
DR
Without Cables
Summary of Contents for E8362A
Page 11: ...Service Guide E8364 90001 1 1 1 Safety and Regulatory Information ...
Page 19: ...Service Guide E8364 90001 2 1 2 General Product Information ...
Page 29: ...Service Guide E8364 90001 3 1 3 Tests and Adjustments ...
Page 79: ...Service Guide E8364 90001 4 1 4 Troubleshooting ...
Page 139: ...Service Guide E8364 90001 5 1 5 Theory of Operation ...
Page 169: ...Service Guide E8364 90001 6 1 6 Replaceable Parts ...
Page 215: ...Service Guide E8364 90001 7 1 7 Repair and Replacement Procedures ...
Page 287: ...Service Guide E8364 90001 A 1 A Error Terms ...
Page 303: ...Service Guide E8364 90001 B 1 B Option Enable Utility ...
Page 309: ...Service Guide E8364 90001 C 1 C Firmware Upgrades ...
Page 313: ...Service Guide E8364 90001 D 1 D Operating System Recovery ...