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Re: [Discuss-gnuradio] Bypassing daughtercards

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] Bypassing daughtercards
Date: Thu, 15 Feb 2007 15:50:26 -0800
User-agent: Thunderbird (X11/20070104)

address@hidden 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?

The correct way to do this is to use the BasicTX, which was designed
specifically for this.  It has 2 SMA outputs, one for I and one for Q.


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