Reference — Time Base

This adjustment adjusts the coarse and fine Reference Timebase DACs for minimum Internal Reference frequency error. The coarse DAC and fine DAC calibration factors are then stored to the ESG. To determine the correct value for the coarse DAC, the fine tune DAC is set to midrange. The coarse DAC is then adjusted for an absolute frequency value as measured on the ESG RF Output. The coarse DAC adjustment stops when the calibration has found the smallest difference between the measured frequency and the absolute frequency. After the coarse DAC has been adjusted, the fine tune DAC is adjusted for absolute frequency accuracy. An external primary 10 MHz standard is used by the frequency counter for optimal accuracy.

Required Test Equipment

Test Equipment

Recommended Model

Alternate Model

Frequency Counter

53230A Opt [106 or 115]

53132A Opt 010 and [050 or 124]
53131A Opt 010 and [050 or 124]

Primary Frequency Standard

Use a 10 MHz house standard.
(For example, a 5071A primary frequency standard or equivalent can be used.)

 

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.