ADC Calibration

This adjustment calibrates the CPU board's ADC gain. The ADC gain is adjusted so that the ABUS reads the same voltage as the digital multimeter when reading the +10 V reference.

During this adjustment, an internal ABUS calibration routine is executed. The ABUS_node is connected to the +10 V reference and measured. The +10 V reference is switched to the Sweep Out connection on the rear-panel interface and the +10 V reference is read by the digital multimeter. The absolute value of the ABUS_node minus the digital multimeter value is stored as the cal factor.

Test Equipment

Preferred Model

Alternate Model(s)

Digital Voltmeter

3458A Opt 002

 

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 ADC 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.