Error message when setting new center frequency

GNU Radio
1

Hello everyone!

We are confused about the error returned by set_rx_center_freq. The code
below is executed while the USRP2 is running.

usrp2::usrp2::sptr u2;

//-- clip --//

usrp2::tune_result tr;
if (!u2->set_rx_center_freq(new_freq, &tr)){
fprintf(stderr, “set_rx_center_freq(%g) failed\n”, new_freq);
//exit(1);
}

This results in that the set_rx_center_freq returns an error, but when
looking at a plot of the received signal, the center frequency seemes to
be set to the new frequency after all.

Regards
//Ulrika

2

On Fri, Jun 12, 2009 at 06:05:54PM +0200, Ulrika U. wrote:

fprintf(stderr, “set_rx_center_freq(%g) failed\n”, new_freq);
//exit(1);
}

This results in that the set_rx_center_freq returns an error, but
when looking at a plot of the received signal, the center frequency
seemes to be set to the new frequency after all.

Regards
//Ulrika

What daughterboard are you using?

Eric

3

I was using the RFX2400 daughterboard.

/Ulrika

-----Ursprungligt meddelande-----
Från: Eric B. [mailto:[email protected]]
Skickat: den 12 juni 2009 20:18
Till: Ulrika U.
Kopia: GNU Radio D.ion
Ämne: Re: [Discuss-gnuradio] Error message when setting new center
frequency

On Fri, Jun 12, 2009 at 06:05:54PM +0200, Ulrika U. wrote:

fprintf(stderr, “set_rx_center_freq(%g) failed\n”, new_freq);
//exit(1);
}

This results in that the set_rx_center_freq returns an error, but when
looking at a plot of the received signal, the center frequency seemes
to be set to the new frequency after all.

Regards
//Ulrika

What daughterboard are you using?

Eric