Atec Agilent-8563E - Manual (Page 128)

ESG Family Signal Generators Adjustments
Gain Adjust Calibration
Calibration Guide 5-31
Gain Adjust Calibration
Description
This test calibrates the GAIN ADJUST DAC on the output board. 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
• HP/Agilent 438A Power Meter
• HP/Agilent 8482A Power Sensor
• HP/Agilent 3458A Digital Multimeter
• HP/Agilent 33120A 15 MHz Function/Arbitrary Waveform Generator
Procedure
Figure 5-27 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.