Low Band Digital Gain Calibration

(E8267D Only)

This adjustment calibrates the GAIN ADJUST DAC on the A8 Output. This GAIN ADJUST 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 achieved. After adjustment, the results are stored in the signal generator.

Test Equipment

Preferred Model

Alternate Model(s)

Power Meter

N1914A1

E4419B
E4419A

Power Sensor

E9304A Opt H19

 
  1. Power meter N1914A with serial numbers ranging between MY00000000—MY53040007 require Service Note 07 to be applied for measurement repeatability. Please have this service note applied or verify it was applied before using this power meter. The affected service note is: N1914A-07 Service Note

Connections and Setup Procedures

  • All test equipment requires a 30 minute warmup period to ensure accurate performance.

  • In the following test setup, cables are designated as solid lines and direct connections are designated as dashed lines.

  1. Connect all test equipment as shown.

  2. Connect GPIB cables to all GPIB-controlled test equipment.

  3. While performing this adjustment, follow all instructions on the controller display.

 

Setup for Power Meter Calibration

 

Setup for Low Band Digital Gain Calibration

In Case of Difficulty

If this adjustment fails, perform the following steps in order:

  1. Check the equipment setup (see above). If the setup is incorrect, make the necessary corrections and rerun the adjustment.

  2. 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.

  3. If you cannot correct the problem using the troubleshooting procedures in the Service Guide, obtain service from Keysight Technologies. Refer to Contacting Keysight Technologies.