I/Q Upconverter Gain

(E8267D Option 532 or 544 Only)

This adjustment calibrates the upconverter gain at A37 45GHz.

The signal generator produces a single sideband p/4 DQPSK signal by having the I/Q data being all zeroes. The I/Q MUX attenuator is increased until the output signal is out of compression. The I/Q Gain Adjust DAC is varied until the proper gain of the A37 45 GHz Upconverter is achieved. This calibration is done for frequencies > 20 GHz.

Test Equipment

Preferred Model

Alternate Model(s)

Power Meter

N1914A1

E4419B
E4419A

Power Sensor

N8487A

8487A Opt H842

External Baseband Signal Generator
Not required for Opt (601 or 602)

E4438C Opt 402 and (001, 002, 601, or 602)

E8267D Opt (601 or 602)
E8267C Opt (002 or 602)
E4430B Opt UN8, E4431B Opt UN8,
E4432B Opt UN8, E4433B Opt UN8,
E4434B Opt UN8, E4435B Opt UN8,
E4436B Opt UN8, E4437B Opt UN8
  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. 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 Upconverter Gain Calibration with Option 601 or 602

 

Setup for Upconverter Gain Calibration without Option 601 or 602

 

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.