If you've tuned in a signal using RIT, but would then like to move VFO
A to that frequency, simply hold the CLR (RIT clear) button for 2
seconds. You'll see "OFS->VFO" flash on VFO B briefly, the RIT offset
will be cleared, and the green LED above the offset knob will turn on.
The VFO A display itself will remain unchanged, because it always shows
the effect of any RIT offset anyway.
Example: Suppose VFO A is tuned to 14250 kHz, and you're tuning around
this frequency using RIT. You find a station calling CQ who's off by
+0.30 kHz, so the VFO is now reading 14250.30 (RIT offset = +0.30).
Just before calling, you hold CLR for two seconds to move VFO A up to
this frequency, so that your transmit and receive frequencies are
equal. The RIT offset is now 0.00.
Another way of accomplishing the above is to turn on both RIT and XIT
at the same time. The offset that was in effect for RIT (receive) will
then also apply to XIT (transmit). In effect, this turns the offset
control into a limited-range VFO knob that covers +/- 9.99 kHz around a
given VFO A frequency.
Note that the RIT/XIT tuning resolution always matches that of the
VFOs. So if you want to tune the offset in 1-Hz steps, just tap FINE.
For large steps, hold COARSE.
When both RIT and XIT are turned off, you can use the offset knob as a
COARSE tuning knob. This requires setting CONFIG:VFO OFS to ON. Be
careful, though -- if you frequently use RIT in contests, you may want
to leave this feature turned off to avoid moving the VFO in large steps
accidentally. OFF is the default.
The COARSE VFO step size can be set per-mode, using the CONFIG:VFO CRS
menu entry. This step size applies to both the COARSE tuning rate of
VFO A and B and to the offset knob function described above, if
enabled.
73,
Wayne
N6KR
---
http://www.elecraft.com
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