Andrew,
The answer is yes to all of that, except for minor points related to
your interpretation.
For clarification, there are two considerations - the first is the
filter width. That is not necessarily the roofing filter width, the DSP
filter width can be much more narrow than the roofing filter. Think of
the roofing filter as something protecting the K3 demodulation from
extremely strong signals, much as a house roof protects those things
under it. Yes, if you have multiple roofing filters installed, the K3
will automatically switch them in as you change the DSP filter width.
The K3 DSP determines the ultimate filtering, rather than the roofing
filter.
Once the DSP filter width is set, that filter passband can be moved
about to change the position of the passband within the demodulated
audio range by changing SHIFT - this SHIFT is equivalent to Passband
Tuning - it repositions the passband without changing the tone of the
received signal..
73,
Don W3FPR
andrew vavra wrote:
> Question for the experienced K3 owners...
>
> I'm planning a purchase in the very near future and want a
> clarification on the roofing filters and use of passband tuning with
> the K3.
>
> I think I understand from reading the forum that the K3 automatically
> selects the filter to match the width of the passband. In other words
> if I narrow the passband using the dual PBT to 500 Hz, the K3 will
> select the 500 Hz roofing filter.
>
> Am I interpreting this correctly?
>
> If this is true, what if I only have 1 roofing filter in the rig...
> say the 2.7 kHz? Can the passband be narrowed even further using PBT
> like I can do with my 756 Pro?
>
> Thanks in advance.
>
> Andy, KD3RF
>
>
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