RF Sweeping Using VST 5646R

[Evrima]

Hi NI-thusiast,

I had a problem with my sweep frequency level. While sourcing a 375MHz to 530MHz with -10dBm of power, no error occurs but when sourcing frequency levels below 375MHz just like the image attached here an error occurs that tells me there is "No source offset was found for power level -10dBm @ 374000000 Hz @ port 1.

Correct me if I am wrong, what I think about this is the calibration of the tester does not consider the levels below 375MHz. The resolution I did, is I calibrate the tester using the 48-Port Module unfortunately that does not solve the problem.

Regards,

Don

[santo_13]

I would also assume that the default calibration does not go below 375MHz.

• You should be posting this query under RF Measurement topic or STS topic since you're mentioning tester and 48-port RF CLB
  https://forums.ni.com/t5/RF-Measurement-Devices/bd-p/290
  https://forums.ni.com/t5/NI-STS-Technical-Support/gh-p/5300
• Since you have got an RF STS, I believe your company would have an NI Application Engineer assigned who can help you with these issues or you can also open a support ticket for help https://www.ni.com/my-support/s/service-requests

[Evrima]

Hi,

Thanks for this reminder I will repost this at that forum