Tom W8JI wrote:
>
>
> If I wanted to center and match a typical SSB or CW filter
> for passband centering, I'd use something like 5 or 10 dB.
> I wouldn't match them at a higher attenuation because it
> really doesn't mean anything and can be very misleading and
> cause the actual useful centers to be misaligned.
>
> It really should just be at some attenuation that is much
> greater than the ripple amount, but not so far down on the
> skirt it is meaningless for the actual passband.
>
There is very little ripple in either the 5-pole or 8-pole filters (as can
be seen in the previous plots), so -6 dB is well beyond any ripple effect.
I'll write up a simple procedure later and post it under a more descriptive
Subject. All you need to do this is a stable signal (like an XG1), the K3's
internal AFV/dBV meter and the VFO. It's not necessary to use Spectrogram
and can actually be done more accurately using the internal K3's internal
capability.
--
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Sent from the [K3] mailing list archive at Nabble.com.
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