HP 89410A continue to be the most noiseless analyzer till this days - effective about only 8 nV/√Hz,
better that some dedicated LNA-s!
Aaarghhh! - No!
Below 100 Hz its 1/f noise is breathtaking. For my low noise amplifiers,
an 80 dB preamp is not enough to mask it. Rising the gain above 80 dB
is impossible because of overflows. And the preamp has 200pV/rt Hz.
regards, Gerhard
(none the less, I kinda like it. Contact me if you want a remote control
C/Linux program to do FFT plots over 9 decades via network.
Requires Gnuplot.)