[Elecraft] cw offset

[Vic Rosenthal]

Earl Ritchie wrote:
> 
> Hi Folks.  What am I missing here?
> When I listen to my K2 CW signal on another recvr on the bands from 80
> to 17 I have to set the K2 about 700 hz higher.  When I listen on 10-15m
> I have to set the K2 about 700 hz lower than the other recvr.  Its
> probably obvious but at this point, I am missing it.

I think it's the other rx that's responsible.

Some receivers (including the K2) display the actual frequency of a CW signal. 
Others display the 'suppressed carrier' frequency -- the frequency where the
carrier would be if the CW signal were one sideband of an AM signal.  This makes
sense for SSB, where the RF power occupies a relatively wide band of frequencies
offset from a (suppressed) carrier, but for CW it's misleading.

Most modern rigs offset the display in CW mode so it will show the actual
frequency of a CW signal, but some older ones (or a modern rig if you have the
mode switch set to SSB) do not.  Apparently your other receiver's BFO is offset
to the opposite side of the IF on 15/10 than the lower bands (although I would
expect it to change on 20m and up in keeping with SSB conventions).

Vic K2VCO