[Elecraft] [K3] IF output

[Geoffrey Mackenzie-Kennedy]

Martin,

If the frequency of the LO signal applied to a mixer is higher than that of 
the incoming signal frequency, as is the case in the K3's receiver on all 
bands except 6m, then a received LSB signal will appear as a USB signal at 
the mixer's IF output.  Also a received USB signal, for example on 20m, will 
appear as a LSB signal at the mixer's IF output.

If the frequency of the LO signal is lower than that of the received signal, 
e.g. on 6m in the K3 case, this "sideband inversion" does not take place. A 
6m USB signal will appear as an USB signal at IF.

73,
Geoff
GM4ESD



DM4iM" <hamradio at vr-web.de> wrote on Wednesday, January 13, 2010 at 11:33 AM

>I hook my TS-850 to the IF-output, it works fine.
> Make sure your "panorama-radio" is not able to transmit into your K3,
> e.g. use a RX-only input or modify it.
>
> I set the TS-850 to USB when listening to LSB-sigs on 80m.
>
> Why is this the case?
>
> Have not yet verified if that changes when listening to higher bands.
>
> Martin
>
> -- 
>
> 73, DM4iM