Dave and Jeff,
Dave you are right in saying that that both IF Shift and RIT (or even the
main tuning knob) can be used to move an interfering signal out of the IF
passband. The advantage of IF Shift is that the 'beat note' from / of the
signal you want does not change as you move the interfering signal, but when
using RIT it will change just as it would when tuning the receiver. This
means that if RIT is used to get rid of the interfering signal the audio
beat note from the wanted signal could change enough to make it necessary to
bypass any narrow audio filter used for CW reception, assuming that the
receiver does not have a BFO whose frequency can be changed using a front
panel control to maintain the beat note at a fixed value.
The required circuitry for IF Shift exists within the K2, but I imagine that
the required changes to the firmware would determine whether or not the
circuits could be used in this way.
Jeff, I think that an outboard S meter would be quite feasible if the K2's
AGC does not drift.
73,
Geoff
GM4ESD
----- Original Message -----
From: "dave" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, February 08, 2007 12:07 AM
Subject: Re: [Elecraft] IF shift
What is the point of IF shift? What purpose does it serve?
Can't you do the same thing (or nearly so) with RIT?
My understanding of IF shift is that it allows you to move an interfering
signal to the edge of the passband and attenuate it by doing so. Seems
that nearly the same result can be achieved with RIT. Please correct me
if I'm wrong on this.
73 de dave
ab9ca
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