Will the variable bandwidth filters have better
ultimate rejection/less blowby than the variable
bandwidth filter in the K2?
With the IF DSP in the K3, the issues that are of concern in a fully
analog radio are less important.
As long as the crystal filter, which is being used as a roofing filter,
has reasonably good skirts and ultimate rejection, the DSP will take
care of the rest. The first 20 dB or so of skirt selectivity, the
passband ripple, and the ultimate rejection at the DSP IF image
frequency are the most critical factors.
73,
Lyle KK7P
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