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Re: [Discuss-gnuradio] Using the USRP LFRX daughterboard to receive a co

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] Using the USRP LFRX daughterboard to receive a complex baseband signal (I+Q)
Date: Sun, 15 Feb 2009 14:24:32 -0800
User-agent: Thunderbird (X11/20090105)

Josh Blum wrote:
The current USRP API does not support receiving complex signal (I on RXA and Q on RXB) from LFRX and BasicRX boards. At least not in an easy way...

In the future, the USRP API will support complex samples, and "usrp_dual_source_x" will have an option called antenna: "RXAB"

Any word on this from developers?

We've talked about this in the past. The quickest way to do this would be to mod the LFRX code. Currently it has 2 subdevices, one for the A input and one for the B input, which control the mux settings. If we made a setting for a "C" input which just changed the mux settings, that would solve it pretty quickly.


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