Kv versus Frequency

The purpose of this adjustment is to determine the tuning sensitivity of the synthesizer loop. The sensitivity of the tuning voltage is measured as the VCO frequency is stepped in 10 MHz steps from 500 to 1000 MHz. For ESGs without option UNJ, the VCO frequency is set by tuning the RF output frequency. For ESGs with Option UNJ, the VCO frequency is set by sending a diagnostic firmware command. At each incremental VCO frequency the tuning voltage is measured (Vtune1) and again at the incremental frequency + 1 MHz (Vtune2). The sensitivity is then calculated in units of MHz/V and stored in the ESG.

Required Test Equipment

Test Equipment

Recommended Model

Alternate Model

Digital Multimeter

3458A Opt 002

34470A

Connections and Setup Procedures
  • All test equipment requires a 30 minute warmup period to ensure accurate performance.
  • In the following adjustment 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.

 

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.