[K3] [Elecraft] AGC THR and noise

Barry N1EU barry.n1eu at gmail.com
Tue Dec 2 12:05:54 EST 2008




Steven.Zabarnick wrote:
> 
> I'm somewhat puzzled by the behavior of the AGC THR adjustment with
> respect
> to band noise. My understanding is that the AGC THR setting adjusts the
> level at which the AGC is activated. Thus, I would expect when listening
> to
> band noise (QRN) that if the noise is activating the AGC, using a higher
> number would prevent AGC activation, resulting in a lower background band
> noise. 
> 
A higher number means that AGC compression begins at a higher signal level,
so a higher number means you'll hear more noise.

take a look at the graphs at
http://www.cliftonlaboratories.com/elecraft_k3_agc_and_s-meter.htm#AGC_SLP_and_AGC_THR

73,
Barry N1EU

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