Tahar7,
What are you really asking for?
Typically you calibrate a VNA frequently using either a manual cal kit or an e-calibrator.
You may be asking if you can use LabVIEW to automate the above calibration of your VNA N9925A.
This assumes you already know how to calibrate the VNA manually or through the UI of the VNA, and you have a cal kit or e-calibrator.
In that case, it comes down to whether this is a LV instrument driver and it if has the necessary API functions.
A quick search shows the LV driver:
Keysight Technologies / Agilent Technologies N9925A FieldFox Handheld RF vector ne - Instrument Driv...
You'd have to install and check out the driver and shipping examples to see if one is provided for VNA cal.
An E-calibrator is going to be the easiest approach, saving the complexity and risk of manually swapping out cal references. The trade-off is that E-calibrator is more expensive, and must come from Keysight.
If you use a manual cal kit, you will need to decide which is best for your case and write a routine if it isn't already written (e.g. Short-Open-Load-Thru (SOLT) or Short-Open-Load-Reciprocal (SOLR)). You can use almost any decent cal kit rated for your frequency. Keysight should have fields where you enter the expected value of each cal reference that you must then measure with the VNA to perform the cal.
Hope this helps.
Kitt
