3-32 Service Guide E8364-90038
Tests and Adjustments PNA Series Microwave Network Analyzers
Performance Tests (Agilent N7840A Software Package) E8362C, E8363C, E836C
Frequency Accuracy Test
Function of the Test: To verify the frequency accuracy and range of the analyzer’s source output.
Specification Tested: Test Port Output–CW Accuracy
Equipment Used: A frequency counter, a test cable, and adapters.
Description of the Test:
1. Port 1 is connected to a frequency counter.
2. A series of frequencies across the band are checked.
If the Analyzer Fails this Test:
• Verify the accuracy of the 10 MHz OCXO by connecting a frequency counter to the rear-panel 10 MHz
REF OUT.
• If the 10 MHz reference is off by more than 10 Hz, perform the “10 MHz Frequency Reference
Adjustment” on page 3-39 and also the “3.8 GHz PMYO Frequency Adjustment” on page 3-40 and repeat
this test.
Trace Noise Test
Function of the Test: To measure the stability of a signal in the internal source and receiver system of your
analyzer.
Specification Tested: Test Port Input–Trace Noise Magnitude and Trace Noise Phase
Equipment Used: A test cable.
Description of the Test:
1. Port 1 and Port 2 are connected with a test cable.
2. The analyzer is set to a series of CW frequencies across its frequency range.
3. Magnitude and phase are measured at each frequency at a 1 kHz IF bandwidth, in both directions.
4. All measurements are made at a nominal power level of 0 dBm and with 201 points per sweep.
If the Analyzer Fails this Test:
• Repeat this test. It is unlikely for the analyzer to fail this test without a complete failure of the network
analyzer system.
• If the analyzer still fails this test, perform the “Receiver Calibration Adjustment” on page 3-47 and repeat
this test.
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