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noise figure measurements with E4448A noise figure opt-get infinity value

Question asked by kronecher06 on Feb 28, 2014
hi,
We are trying to measure noise figure with E4448A (nf opt) . The results on the screen is correct but when we were getting data from device, some value returns as infinity.
We are using SCPI command (:CALC:NFIG:MARK:Y?). Results sample is given below;

4ghz->2,8
4.1ghz->2,9
.
.
.
4,8ghz->99e+37
4,9ghz->3,1  

Outcomes