Agilent Technologies E4438C Guide d'installation télécharger pdf (Page 122)

Adjustments

Digital Gain Adjust Calibration

4-30

Digital Gain Adjust Calibration

Description

This calibration adjusts the GAIN ADJUST DAC on the A13 Output. This DAC is used to control the RF

power level that is incident upon the switched filters and subsequent RF amplifiers by setting the control

point for the gain adjust modulator. This calibration ensures that there will be sufficient power available at

the RF amplifiers to perform the desired modulation while minimizing intermodulation distortion when the

digital modulation is activated. After adjustment, the results are stored in the signal generator’s firmware.

Required Test Equipment

• Agilent E4418B E-Series power meter

• Agilent E9304A E-Series power sensor

• Agilent 3458A Option 002 digital multimeter

• Agilent 33120A function generator

Procedure

Figure 4-22 Digital Gain Adjust 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.

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 139 140

Pas de commentaire

Agilent Technologies E4438C Guide d'installation Page 122