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

From: ematlis
Subject: Re: [Discuss-gnuradio] usrp2 tune two different frequencies
Date: Mon, 20 Apr 2009 12:40:20 -0400 (EDT)
User-agent: Alpine 2.00 (LFD 1167 2008-08-23)

On Mon, 20 Apr 2009, Matt Ettus wrote:

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
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.


I'm in a position only to say, yes please! I do actually use the BasicRX/LFRX daughterboards with 2 real channels.


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