One of our planned variable-BW filters would have a BW of about 1.6-2.4
kHz, targeted at SSB use. This is a crystal roofing filter, not a
filter downstream someplace. It would have at least 4, and possibly as
many as 8 discrete bandwidths. In effect, it's like having four (or
more) filters in one slot, allowing you to narrow down and avoid QRM
with more precision.
It would be automatically set to whichever bandwidth is just above the
selected DSP BW (that which results from the setting of
SHIFT/WIDTH/HICUT/LOCUT).
73,
Wayne
N6KR
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