Hello Rob, Hello Marcus,
thank you for your answers. They make perfect sense.
Have a good day
Paolo
On 25/02/20 14:43, Paolo Palana via USRP-users wrote:
> Hello to all the mailing list.
>
> I've a little problem in setting the rx frequency on my n310 when I need
> to acquire from all 4 channels.
>
> I use the n310 directly in my program using libuhd. The code I use in
> order to set the rx_frequency is:
>
> First of all set the subdevs:
>
> if(vm.count("subdev")){
> mUsrp->set_rx_subdev_spec(mSubDev);
> }
>
> ............
>
> for(size_t i=0; i<mFreqs.size(); i++)
> {
> cout << boost::format("Setting chan %d Freq: %f MHx") % (i)
> % (mFreqs[i]/1e6) << endl;
> uhd::tune_request_t tune_request(mFreqs[i]);
> tune_request.args = uhd::device_addr_t("mode_n=integer");
> mUsrp->set_rx_freq(tune_request, i);
> cout << boost::format("New RX Freq chan %d: %f MHz...") % i
> % (mUsrp->get_rx_freq(i)/1e6) << endl << endl;
> }
>
>
> The output I can see on my console confirm that every channel should
> have the rigth frequency.
>
> Of course this is not the case.
>
>
> Suppose I wont acquire from A:0 RX2 (if I use TX/RX is the same) and A:1
> RX2 tuning the first device at 654.0 MHZ
>
> and the second to 896.8 MHZ. What happen is that both channels are tuned
> to the last frequency (I'm sure of it because I tested it with a signal
> generator).
>
> I'm unable to understand why this happen. Any help is apreciated.
>
> Thank you
>
>
>
>
>
>
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