Synthesizer DAC Adj.

The synthesizer DACs are adjusted for best phase noise. This adjustment is only required on option UNY instruments.

Note: Performing this adjustment on instruments that do not have option UNY can be done but will not improve phase noise. That is, it will have no effect.

Equipment needed:

Compatible Spectrum Analyzer, GPIB cable (or LAN cable), RF cable. An Keysight spectrum analyzer (SA) that covers 6 GHz is required.  The Spectrum Analyzer must be controlled via GPIB or LAN.

Procedure

Note: You must be logged onto the VNA as an Administrator to perform an adjustment. Learn more.

Click Utility, then System, then Service, then Adjustment Routines....

At the Adjustments selection, click Synthesizer DAC Adj.

Follow prompts in the program.

1. The program will prompt for the proper connections.
2. Ensure that the Spectrum Analyzer is connected to the VNA via GPIB or LAN.
3. Click on the Begin Cal button.

Data Storage

• The correction data is temporarily stored on the hard drive but it is then immediately uploaded to the synthesizer flash memory.