[Elecraft] Hearing the effect of narrower roofing filter

[G4ILO]

Darwin, Keith wrote:
> 
> 
> I've not attempted such a complex test as you described (which I snipped
> out).  I have the 500 Hz filter in my rig.  As I narrow the DSP from 2
> KHz to 550 Hz, I can hear a predictable narrowing of the passband with
> each step.  When I step to 500 Hz and the narrow roofing filter kicks
> in, I can hear a distinct change, more than just the DSP narrowing I'd
> heard while stepping from 1000 Hz to 550 Hz.  The effect is very
> noticeable. 
> 

That's just what I find, too. Particulaly when operating PSK, when I reduce
the filter with towards 500Hz I hear the tones of out of band stations
gradually being reduced by each step. When the 500Hz filter kicks in the
tones suddenly disappear altogether.

-----
Julian, G4ILO  K3 s/n: 222 K2 s/n: 392
G4ILO's Shack: www.g4ilo.com
KComm for K2/K3: www.g4ilo.com/kcomm.html
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