AnsweredAssumed Answered

the problemabout measure NF with N8973A

Question asked by hanway on Feb 13, 2012
Latest reply on Feb 15, 2012 by xmo
Hi ,

I am measuring the NF of LNA(0.7dB, 22dB, 700M~800M) with N8973A.
However, I couldn't get the expected NF value. I only got the 1dB NF.
Are there any internal Pre-amp inside N8973A? I wonder if it is nessary to add one pre-amp behind the LNA to  cut the noise from the mixer inside of N8973A.