[Elecraft] K3: CW weak signal

[David Ferrington, M0XDF]

I don't quite understand that - is there some option which allows you  
to choose?
73 de M0XDF, K3 #174

On 10 Nov 2009, at 18:24, Lyle Johnson wrote:

>> For narrow DSP filter bandwidths (100 Hz or less I think) you have  
>> the
>> option of using a FIR filter (default) or an IIR filter.  IIR filters
>> can "ring" which sounds like it might be what you are experiencing.
>
> The use of IIR filters is deprecated.  The K3 defaults to FIR filters
> and we encourage you to use them.