Agilent Technologies E4438C Przewodnik Instalacji Pobierz pdf (Strona 104)

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.

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Agilent Technologies E4438C Przewodnik Instalacji Strona 104