3-10 Service Guide
Adjustments and Correction Constants 8719ET/20ET/22ET
ADC Offset Correction Constants (Test 48) 8719ES/20ES/22ES
RF Network Analyzers
ADC Offset Correction Constants (Test 48)
These correction constants improve the dynamic accuracy by shifting small signals to the
most linear part of the ADC quantizing curve.
Analyzer warmup time: 30 minutes.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Press the following:
NOTE Test 48 takes about three minutes.
3. Observe the analyzer for the results of the adjustment routine:
• If the analyzer displays ADC Ofs Cor DONE, you have completed this procedure.
• If the analyzer displays ADC Ofs Cor FAIL, repeat the test.
4. If no more correction constant routines are going to be performed, return the A7 Switch
to the NRM position and perform the “EEPROM Backup Disk Procedure,” on page 3-33.
In Case of Difficulty
• If the analyzer displays ADC Ofs Cor FAIL after repeating the test, refer to Chapter 6 ,
“Digital Control Troubleshooting,” or contact the nearest Agilent Technologies sales or
service office.
Preset
Preset
System
48 x1
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