Keysight N5221A/22A Service Guide 3-41
Tests and Adjustments
Adjustments
Adjustments
These adjustments are firmware-driven tests that are used to fine-tune your
analyzer.
If multiple adjustments are to be performed, perform them in the order listed.
— “10 MHz Frequency Reference Adjustment” on page 3-41
— “Synthesizer Bandwidth Adjustment” on page 3-42
— “Source Adjustment” on page 3-42
— “IF Gain Adjustment” on page 3-43
— “Receiver Characterization” on page 3-43
— “Receiver Adjustment” on page 3-44
— “EE Default Adjustment” on page 3-46
— “IF Response Adjustment (Option 090, 093, or 094 Only)” on page 3-46
These adjustments are described on the following pages.
10 MHz Frequency Reference Adjustment
The 10 MHz frequency adjustment is used to adjust the frequency accuracy of
the network analyzer’s 10 MHz frequency reference on the A10 frequency
reference board assembly.
Equipment Used for the 10 MHz Frequency Reference Adjustment
Procedure
1. Connect the equipment as shown in Figure 3-14. Connect a GPIB cable
between the network analyzer and the frequency counter.
Equipment Type Model or Part Number Alternate Model or Part Number
Cable, BNC, 50Ω, 24 inch 8120-1839 Any
Frequency counter 53151A, Option 001 Any that will measure a signal at 10 MHz.
This adjustment typically adjusts to within ±0.01 ppm.
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