[Elecraft] Spectrogram - Again

[JAKidz]

Greetings:
	I was having a lot of trouble aligning my K2's crystal filters even though
I was using the N0SS noise generator and Spectrogram. Starting from the K2
manual settings for the filters, lots of peaks of variable heights were
appearing everywhere across the spectrum no matter the filter settings even
though the radio seemed to be working. After a lot of fiddling, two things
became apparent. I was setting both the N0SS noise generator and the K2 AF
gain too high. Using the output pot to set the noise generator just above
receiver noise on my headphones and then setting the K2 AF gain to minimum
and increasing it slowly, the desired shapes began appearing. I'm guessing
my computer's soundcard was clipping even at moderate audio levels and the
FFT processing of the resulting "squared" waves in Spectrogram resulted in
all those interesting peaks.

John, K7JG and K2 #1932.