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Re: [Discuss-gnuradio] USRP1+external VUHF Tuner and C++ Interface

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] USRP1+external VUHF Tuner and C++ Interface
Date: Wed, 29 Jul 2009 15:12:28 -0700
User-agent: Mutt/1.5.18 (2008-05-17)

On Wed, Jul 29, 2009 at 02:31:12PM -0700, Luca Pascale wrote:
> Hi all,
> I am trying to use USRP1 with an external Tuner using the C++ USRP interface
> example founded on the wiki.
> The Tuner have a 16 MHz BW centered at 21.4MHz IF.
> I have connected it (passing through a passband filter centered @21.4M and
> 16M wide) to USRP using the BasicRX daughterboard. I have some doubt about
> this setup.
> A) Do I need to control in someway (by a "driver") the doughterboard?
> B) How should I have to set the DDC freq ( set_rx_freq() ) to get correctly
> the signals around the 21.4M IF ?
> Thanks in advance,

  usrp_tune_result r;
  bool ok = u->tune(0, db, 21.4e6, r);


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