Compare the NF of ATF33143feb with the NF of PSA4-5043
(Jan 30 2013)

The average S/N is -0.1713 for ATF33143feb while the PSA4-5043 shows S/N=-0.6057 with a known NF of 0.6191 dB. The correction for the S/N scale to show NF (with reversed sign) is to add -0.0134 dB.

From this comparison one would conclude that the NF of the ATF33143feb is 0.1847 dB.