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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.

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Agilent Technologies E4438C Guida di Installazione Pagina 101