I had a couple of questions about the K3's VFO setup. There are dual
VFOs (A and B), controlled by separate VFO knobs. You can operate
SPLIT, as usual, whether there's a subreceiver or not.
The K3's VFOs can be set to different modes and even different bands.
Each VFO also keeps track of its own filter presets (I and II), on a
per-mode basis. A "preset" in K3-land is a combination of a crystal
filter (selected automatically by the DSP controls) and the DSP
settings (shift/width or hicut/locut, which can be used
interchangably). Having two presets per-mode/per-VFO allows you to set
up the two xfil/DSP combinations you use most often and quickly toggle
between them using the I/II button.
There will be an option to link the VFOs (frequency and/or mode and/or
band), or make them fully independent. For example, if you allow VFO B
to be completely independent of A, you can set it to a different band,
perhaps to monitor a calling frequency, while using VFO A for normal
ham-band RX/TX.
VFO B has its own frequency display, LOCK icon, and (if the sub is
installed), its own AF GAIN control. To set up other VFO B/subreceiver
parameters, you can either set up VFO A first and swap it with B, set
up VFO A and copy it to B, or use the BSET switch to directly set up
all VFO B parameters.
When BSET is in effect, all of the DSP controls, S-meter, etc. pertain
to VFO B/sub.
Of course an external computer control program could present two entire
sets of controls, S-meter, etc. for the two receivers. This is left as
an exercise for the reader :)
73,
Wayne
N6KR
---
http://www.elecraft.com
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