Hi Dave,
Without a saved CONFIG file, I don't think there
is a way to retrieve the filter settings directly from
the K3. Have you tried examining the filter settings
for any information that is stored in a CONFIG file?
The K3 Utility permits viewing and editing stored
crystal filter settings.
You could try to visually inspect the filter bandwidths
using an audio spectrum analysis tool, but you would
have to turn off any DSP filtering to see the actual
IF crystal filter response at audio frequencies. With
some effort you could distinguish 5-pole from 8-pole
filters using the transition band slopes, but estimating
-6 dB bandwidths should be more straightforward from
the displayed spectrum. While a separate wideband
noise generator would be the best source, you might
have enough local wideband noise to obtain a reasonable
spectrum depiction over the crystal filter response width.
73,
Mike, K8CN
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