Leiser
Automotive
- Apr 19, 2007
- 92
Hi all,
I am doing some noise figure measurements for LNAs. I am using a network anylizer, ESA4402 with the noise figure suite installed and a noise figure source, the agilent 346A with around 5.5dB ENR.
Well, I have experienced regularly that after doing the calibration, just connectig the noise source straight to the ESA, the noise figure plotted oscillates between -1 and 1dB the worse case.
I would like to know if this is the accuary expected when using these equipments to measure noise figure.
I contacted Agilent and checked the specs for the uncertainty of the measurement when using these equipment, but still the results are out of that. (I played with the BW, internal att, etc)
Does anyone have experience measureng NF with this setup? what is the best results you get after doing a calibration?
Thanks!
I am doing some noise figure measurements for LNAs. I am using a network anylizer, ESA4402 with the noise figure suite installed and a noise figure source, the agilent 346A with around 5.5dB ENR.
Well, I have experienced regularly that after doing the calibration, just connectig the noise source straight to the ESA, the noise figure plotted oscillates between -1 and 1dB the worse case.
I would like to know if this is the accuary expected when using these equipments to measure noise figure.
I contacted Agilent and checked the specs for the uncertainty of the measurement when using these equipment, but still the results are out of that. (I played with the BW, internal att, etc)
Does anyone have experience measureng NF with this setup? what is the best results you get after doing a calibration?
Thanks!