Thanks Sverre, Mike and Don.
Doh!
After cutting the PC's software gain control to near-minimum, it does
appear that most if not all of the odd-harmonic distortion was due
to overdriving the soundcard. To make certain, I will repeat the
experiment on a USB sound card that has bona fide line inp
Ken,
I do not believe that harmonic distortion is coming from the K2 - that
pattern looks like a soundcard overdriven condition to me.
When you reduce the AF Gain at the K2, you reduce the input to the sound
card, and at some point, the soundcard no longer distorts.
Use the PC soundcard mixer co
G'day,
| Today I fed an S9 CW signal into Spectrogram and find that its third
audio
| harmonic is down approximately 10 dB from the fundamental. The 5th,
| 7th, 9th, are down about 4 db sucessively from the next-lower odd
| harmonic.
Sounds like overdriving the sound card to me. I never run Sp
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