[Elecraft] DSP Shape Factor and Weak Signals

[Lyle Johnson]

> Question for Lyle or whoever might know...does the K3 DSP
> allow for easy adjustment of the tap setting?  

There are several ways to get this effect.  Altering the tap settings 
may be one way.

The K3 initial firmware provides two features that may be used to 
achieve a similar effect.

The first is to set the wider bandwidth using the WIDTH control, then 
turn on NR (noise reduction).  If the band is quiet, this will result in 
suppression of noise.  When a signal appears, NR essentially builds a 
low tap count filter around it, so you get much of the effect you're 
referring to.  Of course, the narrower the WIDTH setting, the less 
effect NR will have.

If the band is crowded, you can use the dual passband feature (sometimes 
referred to as focus and context filtering) to emphasize the signal near 
the sidetone pitch you prefer while still allowing you to hear - at 
reduced gain - nearby frequencies.

73,

Lyle KK7P