Use this calibration to optimally set the LBOUT/HBOUT: GAIN_ADJUST_DAC on the output board for use in the digital mode of operation.
The LBOUT/HBOUT: GAIN_ADJUST_DAC on the output board is used to control the RF power level that is incident upon the switched filters and subsequent RF amplifiers. This is accomplished by setting the control point for the gain adjust modulator. The goal of this calibration is to have sufficient power available at the amplifiers to perform the desired modulation (and have enough UUT output power available), while minimizing harmonics and intermodulation distortion when digital modulation is in use.
Test Equipment |
Recommended Model |
Alternate Model |
Power Meter |
N1914B |
N1914A1 E4418A |
Power Sensor |
N8482A |
E9304A |
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Power Meter and Power Sensor Calibration
If this adjustment fails, perform the following steps in order:
Check the equipment setup (see above). If the setup is incorrect, make the necessary corrections and rerun the adjustment.
If this adjustment fails with the equipment set up properly, refer to the troubleshooting section of the signal generator's service guide. If you do not have a printed copy of the service guide (Option OBW), one is available either on the CD-ROM that came with your signal generator shipment or on the Keysight Website.
If you cannot correct the problem using the troubleshooting procedures in the Service Guide, obtain service from Keysight Technologies. Refer to Contacting Keysight Technologies.