High Band High Power ALC Linearity Calibration

(E8257D with Option 521 Only)

This adjustment ensures zero offset and linear performance of the ALC Level DAC at high power levels above 3.2 GHz.

Test Equipment

Preferred Model

Alternate Model(s)

Power Meter

N1914A1

E4419B
E4419A

Power Sensor

N8487A (50 GHz)2

E9300A H25 (24 GHz)2
N8485A (26.5 GHz)2
N8485A CFT (26.5 GHz)2
8485A, H84 (26.5 GHz)2,3
8487A, H84 (50 GHz)2,3
  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
  2. Select a power sensor that is at or greater than the maximum frequency of the DUT.  Use a 50 GHz power sensor for units with Option 567.
  3. Option H84 provides reflection coefficient data.

 

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 High Band High Power ALC Linearity 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.