http://elecraft.85.s1.nabble.com/K3-in-a-cw-pileup-needs-work-tp4523884p4529511.html
on VIFGAIN1 on the RF board. It is at least some derivative of the
> Barry,
>
> I do not believe that is true, and the graphs at
>
http://www.cliftonlaboratories.com/elecraft_k3_agc_and_s-meter.htm#AGC_SLP_and_AGC_THR> bear the real facts as well.
> Raising the AGC Threshold allows stronger weak signals (less than -100
> dBm for THR=008) NOT to activate the AGC. Stronger signals will still
> activate AGC. The Hardware AGC is not changed by the threshold setting.
> The result is the range over which the AGC operates, and that is
> different than the dynamic range of the receiver.
>
> The Gain Throttling talk has mostly been with reference to the
> amplification of atmospheric noise rather than the detection of weak
> signals. While related, I do not think they are the same.
>
> The preamp and attenuator DO translate the receiver dynamic range to a
> higher or lower level - and the hardware AGC trigger point is translated
> as well. Since the RF Gain is really an IF gain, it does not alter the
> onset of hardware AGC. Lyle would have to comment on whether the DSP
> AGC is developed before or after the IF gain is applied, I do not know.
>
> 73,
> Don W3FPR
>
> Barry N1EU wrote:
>> If you simply raise AGC Threshold, you will have to lower AF Gain or risk
>> overly loud audio from stronger signals. So what you would effectively be
>> doing is translating upwards the K3's dynamic range into higher rf levels.
>> This is NOT good practice - you want to keep the dynamic range operating at
>> lower rf levels (thus all the talk of gain throttling).
>>
>> 73,
>> Barry N1EU
>>
>>
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