Description, Required test equipment, Procedure – Agilent Technologies E4438C User Manual
Page 101: Description -9, Required test equipment -9, Procedure -9
Adjustments
Pretune Calibration (Option UNJ or Option 506 Only)
4- 9
Pretune Calibration
(Option UNJ or Option 506 Only)
Description
This adjustment determines the YO offset and gain calibration constants that minimize the YO phase lock
error voltage. The phase lock error voltage is measured with the internal analog bus and is minimized at both
low and high YO frequencies by controlling the YO pretune DAC. The YO pretune DAC settings are used to
calculate the YO offset and gain calibration constants.
Required Test Equipment
• Agilent 53132A Option 050 frequency counter
Procedure
Figure 4-3
Pretune Calibration
(Option UNJ or Option 506 Only) Setup
1. Connect the equipment as shown above.
2. Preset all of the equipment.
3. Follow the instructions as they appear on the controller’s display.