Agilent Technologies E4438C Instalační příručka stáhnout pdf (Strana 117)

Adjustments

External Input Peak Detector Calibration

4-25

External Input Peak Detector Calibration

Description

This calibration is used to calibrate the positive trip level of the EXT1 and EXT2 peak detectors located on the

A17 Synthesizer (Option 501, 502, 503, 504). The calibration generates DAC values for the modulation

comparator DACs which provide a voltage to the window comparator operational amplifiers. When the peak

detector level DACs are set correctly, the overmodulation indicator will trigger whenever the voltage to the

EXT1/EXT2 input is greater than 1.03 V. The resulting DAC values are saved as a calibration constant in the

signal generator’s firmware.

Required Test Equipment

• Agilent 3458A Option 002 digital multimeter

• Agilent 33120A function generator

Procedure

Figure 4-18 External Input Peak Detector Calibration 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 Instalační příručka Strana 117