158 Keysight Agile Signal Generator Service Guide
Post-Repair Procedures and Operational Performance Verification
Assembly A20
For Serial Prefixes < xx5646xxxx
Before replacing the A20 assembly, check the Hardware ID (HWID) for the
installed Electronic Attenuator (EAT) and the High Band Detector. This will
determine what adjustments and performance tests need to be run after the
A20 replacement.
On the UXG, press System, Instrument Info, Installed Board Info, Next Page.
EAT HWID __________
HBD HWID __________
If the EAT HWID is 2, or the HBD HWID is 3 or 4, perform the following
adjustments and performance tests after the A20 assembly is replaced.
Adjustments Required
Performance Tests Required
If the HWID numbers are not these numbers, perform the adjustments and
performance tests listed in the section "For Serial Prefixes ≥ xx5646xxxx and
newer HWID numbers" on page 159 after the A20 assembly is replaced.
Adjustment Name
Calibration Array Default
Run all adjustments except
"Calibration Array Restore"
Performance Test Name
Run all performance tests
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