[Elecraft] Roofing filters and DSP bandwidth tuning

[David Woolley]

On 27/01/2021 20:35, Fred Jensen wrote:
>    It follows that you'd probably like the selection of roofing filters 
> to follow the DSP BW as closely as possible.

Having the roofing filter too close to the DSP filter is not necessarily 
a good thing, as the roofing filters are likely to have worse passband 
ripples and will have non-linear phase responses, which can compromise 
digital modes.  At least some of the DSP filters are finite impulse 
response, meaning they are also linear phase, which means that pulses 
will not get smeared out.

-- 
David Woolley