Adc Offset Correction Constants (Test 48) - Agilent Technologies 8719ET Service Manual

Adjustments and Correction Constants

ADC Offset Correction Constants (Test 48)

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:
Preset PRESET: FACTORY
SERVICE MENU
System
EXECUTE TEST
48 x1
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
In Case of Difficulty
• If the analyzer displays ADC Ofs Cor FAIL after repeating the test, refer to
"Digital Control Troubleshooting,"
service office.
3-10
Preset
TESTS
YES
"EEPROM Backup Disk Procedure," on page
or contact the nearest Agilent Technologies sales or
8719ET/20ET/22ET
8719ES/20ES/22ES
RF Network Analyzers
3-33.
Chapter 6 ,
Service Guide