On 2/15/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
I am currently working with GNU radio and USRP board with its transceiver 
daughtercards for transmitting and receiving signals.  I have recently aqcuired 
new RF front end hardware that can mix a baseband signal up to 3.4 GHz and 
transmit it.  The interface to the new RF hardware is thru BNC cables.  I want 
to know if there is a way that I can do all the processing in GNU radio, send 
the data through the usrp board to and the transmit DAC's, and then send the I 
and Q channels from the DAC to the new RF front end hardware.  For example, are 
there pins on the USRP board (or daughtercards) that I can pull the I/Q data 
off of to send to the new hardware?

Thanks
Nick

You can pick up the baseband differential analog signals of I/Q from
the daugherboard header.  I believe the dboard.sch in the usrp-hw
module under SVN would be helpful.

http://gnuradio.org/trac/browser/usrp-hw/trunk/usrp

Brian


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