Thanks so much, this is exactly what I am eventually trying to accomplish.
Sampling 4 real signals using two LFRX daughtercards

Thanks,
Dan



--- On Wed, 3/10/10, Sebastiaan Heunis <sheu...@gmail.com> wrote:

From: Sebastiaan Heunis <sheu...@gmail.com>
Subject: Re: [Discuss-gnuradio] Multiple Channel USRP Confusion
To: "Karthik" <karthik1...@gmail.com>
Cc: "dan s" <dsurfe...@yahoo.com>, discuss-gnuradio@gnu.org
Date: Wednesday, March 10, 2010, 1:13 PM

Dan

I haven't used GNURadio companion before, but what you need to do is the 
following:

Set the mux to (0xf1f0f1f0).  This will connect ADC0 (which is the first ADC on 
side A) to the I input of the first DDC in the USRP.  ADC1 (which is also on 
side A) will be connected to the I input of the second ADC.  Then you just wire 
up your two chains in your GNURadio apps and use a deinterleaver to connect the 
appropriate channel to the right blocks in your app.  There is an example app 
somewhere in the Gnuradio installation directory that shows how to receive 4 
real channels with 2 LFRX boards.


Sebastiaan

 
On Tue, Mar 9, 2010 at 10:33 PM, dan s <dsurfe...@yahoo.com> wrote:






Hi all,

I am looking to simultaneously record two real signals (not with IQ) using a 
single LFRX daughtercard.

How can I do this with GNURadio companion?  I have spent a while looking at the 
USRP Source and Dual USRP Source blocks and could not figure out.




I am looking to record from Side A with RXA and RXB.  I tried setting the RX 
Antenna setting to RXAB and used the complex to real block to extract channel 
RXA, and complex to imaginary block to extract RXB.  I don't think this worked 
properly.




I also tried using two separate USRP source blocks, each on side A but one for 
RXA and the other for RXB.  When I did this I got an error related to already 
having one USRP side A block running.

Any help would be greatly appreciated




Thanks,
Dan





      






      
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