[Elecraft] Re: K3 Beta Firmware Release -- MCU Revision 2.19

[Brendan Minish]

On Tue, 2008-07-22 at 20:45 -0700, wayne burdick wrote:

> For bandwidth settings of 100 Hz or lower, the K3’s DSP normally uses a 
> type of filter that minimizes ringing: the Finite Impulse Response or 
> FIR filter.
> 
> If you don’t mind a small amount of ringing, you can select Infinite 
> Impulse Response or IIR filters for these bandwidths, which have 
> steeper skirts. Locate the CONFIG:FLx BW menu entry, then tap 7 until 
> you see IIR ON. Both main and sub receivers will use the same setting.

I would just like to add that in certain circumstances with signals
buried in the noise this little bit of ringing can help the signal out
of the muck.
I find the IIR filters useful on 160m and I am glad the option is there.
Choice is good ;-)   
73
Brendan EI6IZ 


-- 
Don‘t complain. Nobody will understand. Or care. And certainly don‘t try
to fix the situation yourself. It‘s dangerous. Leave it to a highly
untrained, unqualified, expendable professional.