3-8 Service Guide
Adjustments and Correction Constants 8719ET/20ET/22ET
Analog Bus Correction Constants (Test 44) 8719ES/20ES/22ES
RF Network Analyzers
Analog Bus Correction Constants (Test 44)
This procedure calibrates the analog bus by using three reference voltages (ground,
+0.37 volts and +2.5 volts), then stores the calibration data as correction constants in
EEPROMs.
Analyzer warmup time: 30 minutes.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Press the following:
3. Observe the analyzer for the results of the adjustment routine:
• If the analyzer displays ABUS Cor DONE, you have completed this procedure.
• If the analyzer displays ABUS 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
• Refer to Chapter 6 , “Digital Control Troubleshooting,” or contact the nearest Agilent
Technologies sales or service office.
Preset
Preset
System
44 x1
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