[Elecraft] Impossible mission? USB with the 13khz filter for PSK31on Digipan

[Joe Subich, W4TV]

> Most PC SDR software needs an I/Q pair of signals which this 
> is not, but there is software that will take a single signal 
> elevated above baseband (I believe Softrock works this way).

The SoftRock receivers and LP-Pan operate much the same way.  
They are fixed frequency downconverters that provide I/Q audio 
outputs.  The I/Q audio is then applied to a common soundcard.  
The higher quality soundcards provide a wider frequency "window"
(higher sample rates), lower noise floor/higher dynamic range, 
and better image rejection (better I/Q balance). 

73, 

   ... Joe, W4TV 
 
 


> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of ab2tc
> Sent: Saturday, January 31, 2009 11:49 AM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Impossible mission? USB with the 
> 13khz filter for PSK31on Digipan
> 
> 
> 
> The 2nd IF is 15kHz which is well within the capabilities of 
> many sound cards. But it would require surgery to the K3 as 
> this signal is not available externally. It would certainly 
> be an interesting experiment for the bold risk taker. Most PC 
> SDR software needs an I/Q pair of signals which this is not, 
> but there is software that will take a single signal elevated 
> above baseband (I believe Softrock works this way).
> 
> 
> Don Wilhelm-4 wrote:
> > 
> > I don't think there are any soundcards capable of handling 
> the 8+ MHz 
> > IF
> > output from the K3, but LP-PAN converts that IF signal down 
> to baseband 
> > and does exactly what you are asking about with PowerSDR.
> > 
> > 73,
> > Don W3FPR
> > 
> > AD6XY wrote:
> >> Has anyone tried taking the K3s 2nd IF out to a high end soundcard 
> >> and doing the DSP on a PC?
> > 
> > 
> 
> 
> -----
> AB2TC - Knut
> -- 
> View this message in context: 
> http://n2.nabble.com/Impossible-mission--USB-with-the-13khz-fi
lter-for-PSK31-on-Digipan-tp2240355p2250439.html
Sent from the Elecraft mailing list archive at Nabble.com.

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html