Description, Required test equipment, Procedure – Agilent Technologies E4438C User Manual
Page 104: Description -12, Required test equipment -12, Procedure -12, Lock angle potentiometer calibration (not
Adjustments
Lock Angle Potentiometer Calibration (Not Used with Option UNJ or Option 506)
4-12
Lock Angle Potentiometer Calibration
(Not Used with Option UNJ or Option 506)
Description
This calibration is used to optimize the phase detector sampling of the synthesizer phase-locked loop
reference frequencies. The lock angle adjustment sets the time during the reference cycle when the
ultra-quiet time phase detector measurement occurs. The phase detector needs to make its measurement at
the quietest point in the reference cycle. By adjusting this potentiometer to minimize the level of the
fractional-N spur, the time of the phase detector sample can be optimized.
Required Test Equipment
• Agilent 8563EC Option 001 spectrum analyzer
Procedure
Figure 4-6
Lock Angle Potentiometer Calibration
(Not Used with Option UNJ or Option 506) 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.