K3 I/Q tomfoolery

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K3 I/Q tomfoolery

Brendan Minish
The K3 audio effects options includes Binarual Stereo, this is in fact
I/Q Stereo.
If you select this then feed the headphone audio to SDR software that
can handle I/Q you can use the the K3 as a narrow-band Front end for
software such as powerSDR
The amount of bandwidth you can cover this way is of course limited by
the DSP filter set on the K3 so try SSB with the widest roofing filter
you have

I found with my setup I had to, in the software reverse the I/Q channels
then all was good. After a bit of fooling around I was able to get a
good level of image rejection

Is this useful? I dunno, but it's interesting none the less.
 
73
Brendan EI6IZ

--
Don‘t complain. Nobody will understand. Or care. And certainly don‘t try
to fix the situation yourself. It‘s dangerous. Leave it to a highly
untrained, unqualified, expendable professional.

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Re: K3 I/Q tomfoolery

David Fleming-2
This -is- interesting. Now if we could get Wayne and Lyle to provide a 11 KHz quadrature ( I/Q ) signal.. Now that would be the ticket. No Softrock required.

David, W4SMT

Brendan Minish <[hidden email]> wrote: The K3 audio effects options includes Binarual Stereo, this is in fact
I/Q Stereo.
If you select this then feed the headphone audio to SDR software that
can handle I/Q you can use the the K3 as a narrow-band Front end for
software such as powerSDR
The amount of bandwidth you can cover this way is of course limited by
the DSP filter set on the K3 so try SSB with the widest roofing filter
you have

I found with my setup I had to, in the software reverse the I/Q channels
then all was good. After a bit of fooling around I was able to get a
good level of image rejection

Is this useful? I dunno, but it's interesting none the less.
 
73
Brendan EI6IZ

--
Don‘t complain. Nobody will understand. Or care. And certainly don‘t try
to fix the situation yourself. It‘s dangerous. Leave it to a highly
untrained, unqualified, expendable professional.

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Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
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Elecraft web page: http://www.elecraft.com

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Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
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