Agilent Technologies E4438C Guia de Instalação descarregar pdf (Página 121)

Adjustments

VBLO Mixer Bias Calibration

4-29

VBLO Mixer Bias Calibration

Description

This calibration adjusts the VBLO MIXER BIAS DAC on the A13 Output. This DAC is used to control the

bias voltage to the internal mixers. This DAC is primarily used to adjust the mixer bias for optimum I/Q

modulation linearity, but it has a secondary influence on mixer gain. This calibration ensures that there will

be sufficient power available through the mixers 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

•None

Procedure

1. Preset the signal generator.

2. Follow the instructions as they appear on the controller’s display.

1 2 ... 116 117 118 119 120 121 122 123 124 125 126 ... 139 140

Sem comentários

Agilent Technologies E4438C Guia de Instalação Página 121