Calibration Coefficients Test - Keysight Technologies M937 A PXIe Series Service Manual

Tests, Adjustments, and Troubleshooting
Performance Tests

Calibration Coefficients Test

Function of the Test
To verify the uncorrected calibration coefficients of your analyzer. The
calibration coefficients are specified at the test port without any cables, so
calibrations must be performed in both the forward and reverse directions to
eliminate the effects of the test cable.
Specification Tested
Uncorrected System Performance
Equipment Used
- N4691B ECal module (or 3.5 mm mechanical calibration kit)
- A test cable
- Any necessary adapters
Description of the Test
A full SOLT 2-port calibration is performed on Ports 1 and 2. The ports are
tested as a pair. Isolation is turned off during each calibration.
1. A test cable is connected to Port 1.
2. A calibration is performed between the end of the test cable and Port 2. The
Port 2 directivity and source match and the S
from the analyzer.
3. The test cable is moved to Port 2.
4. A calibration is performed between the end of the test cable and Port 1. The
Port 1 directivity and source match and the S
from the analyzer.
If the Analyzer Fails this Test
- If the analyzer fails this test, return it to Keysight for repair. Refer to
"Shipping Your Network Analyzer for Service or Repair" on page 1-3
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load match are retrieved
21
load match are retrieved
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Keysight M937xA PXIe Service Guide