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Re: [Discuss-gnuradio] usrp2 tune two different frequencies

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] usrp2 tune two different frequencies
Date: Mon, 20 Apr 2009 09:37:04 -0700
User-agent: Thunderbird (X11/20090320)

address@hidden wrote:
On Mon, 20 Apr 2009, Johnathan Corgan wrote:

On Mon, Apr 20, 2009 at 7:59 AM,  <address@hidden> wrote:

Is there any reason why the situation could not be the same as with the
USPR1, with which I can program 2 DDC's on 1 LFRX daughterboard (with the
appropriate mux) to tune in two separate frequencies?

Yes, the USRP2 only has one DDC in the FPGA code.


I guess I was just curious why there is only one DDC in the FPGA, and if it's possible in future that more than one will be made available.

It wouldn't be hard at all to put a second one in there, along with a second DUC. Everything is set up to hold it, and there is enough space.

We just haven't had a need yet, since the USRP2 only holds one daughterboard. If, however, you want to RX or transmit 2 different signals on the same daughterboard, or are using a BasicRX/TX with dual independent real signals at IF, then it would make sense.


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