[Elecraft] Attenuator and RF Gain Settings

[Don Wilhelm]

Lance,

Both the AF Gain setting and the AGC on/off condition will modify the 
S-meter response.  As a result, comparing S-meter readings with AGC on 
vs. off is not a valid comparison.  All I can say is that "yes" the 
S-meter reading will change.
Some combination of that behavior is present on each receiver I have 
ever owned or operated.  Each one is different.  How the S-meter changes 
with each condition depends on where the particular receiver picks off 
the S-meter signal.

73,
Don W3FPR

Lance Wilson wrote:
> Don,
>
> Given how you have set up your K3 I am in agreement with the performance
> you've noted. I'm experimenting on 20M, RF gain full on, preamp and att off.
> I am also listening under SSB conditions. I have the RF gain fully on only
> to experiment with the AGC.
>
> Here is an example, with the AGC off my noise level on the S-meter is S2 to
> S3. With the AGC on it is S6 to S7 with no signal present. If I listen to a
> S8 signal with the AGC on my noise level is still S6. With AGC off that same
> signal is S7 with a noise level again of S2 to S3. This is not normal AGC
> behavior and perhaps there are some issues between the DSP and hardware AGC.
> Changing AGC parameters has no effect on what I am seeing.
>
> Lance, NR7N
>   
>