[Elecraft] K3_P3_160_CW

[Ian White GM3SEK]

Alan Bloom wrote:
>The P3 keeps track of the preamp/attenuator status reported by the K3 
>so that the dBm or S-unit display reads accurately.  That can lead to 
>some non-intuitive behavior.  For example, turning on the K3 preamp 
>typically makes the noise level on the P3 go down rather than up.  The 
>reason is that the P3 is turning down its gain to compensate for the 
>increased gain in the K3.
>
>However this doesn't always work correctly when switching the RX 
>antenna on the K3.  Currently the K3 does not send an update to the P3 
>if switching antennas causes the preamp or attenuator status to change. 
>This is on Wayne's bug list.
>

 From the wider viewpoint of optimizing the dynamic range on each band, 
it would be very helpful if the required preamp/attenuator settings were 
saved separately for each antenna input. Those settings would then be 
'applied' to whichever receiver(s) are using that input.

Don has just shown exactly why this is needed, because it's the 
*antennas* that create the variations in signal levels and background 
noise.


-- 

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek