[Elecraft] DSP and IF filtering

[Don Wilhelm]

Leo,

The DSP for the K2 is done at audio, so a wide IF will still let nearby
interfering signals into the AGC and will desense the receiver.  Using a
narrower IF can avoid that problem.

So if you notice that the receiver sensitivity appears to decrease when QRM
is present (S-meter will increase, so use the ears), switching to a narrower
filter would be my first course of action.  If you can get additional
improvement by then using the DSP, by all means use it.

73,
Don W3FPR

----- Original Message ----- 
|
| the K2 allows it's IF and DSP filters to be set in any combination.
|
| What would be the advantage (in any) to set the IF wide and the AF narrow,
| or vise-versa ? I'm a casual operator, and used the old AF filter mostly
for
| the clock, switching once in a while to the default IF2 filter and rarely
to
| IF3, but most operating was done on IF1. I would have thought that, if IF
| and DSP have to "team up", this would be an option in the menu.
|