Good point Jim - I hadn't thought it through to consider/realize that
the sound card is a full duplex device and therefore can handle TX and
RX devices both concurrently and independently. 


Lee Pedlow NG6B
San Diego, CA
-----Original Message-----
From: Jim Lux [mailto:[EMAIL PROTECTED] 
Sent: Wednesday, June 21, 2006 2:55 PM
To: Pedlow, Lee; [email protected]
Subject: Re: [Flexradio] Improved CW Performance SDR 1000

At 12:59 PM 6/21/2006, Pedlow, Lee wrote:
>I
>Modifying the SDR to separate TX & RX chains would require a wholesale 
>rework of the entire rf path from TRX through to PA and duplication (at

>a minimum) of the BPF board in order to realize such a function.  In 
>the end, it would probably be easier to add an additional soundcard, 
>make some relatively minor code changes and add a second SDR hardware 
>set sans PA and maybe BPF to actually implement a segregated TX/RX
function.

I agree.. the only potential advantage of an integrated solution is that
you could use the same DDS for both Tx and Rx.  BTW, you don't need a
second sound card.  Run the audio out from the PC to your TX SDR-1000
and your audio in comes from the RX SDR-1000.


Jim 






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