Hi all,
After repeated tests, we feel that two of the four channels of two devices
will be randomly selected, and the probability of choosing the correct
channel is very low. It must be a bug.
Hi Macus,
> try:
>
> stream_args.channels.push_back(0);
> stream_args.channels.push_back(1):
>
> Instead of your:
>
> stream_args.channels = {0,1};
> I think these should be equivalent, but my C++ fluency is low...
Thank you for your reply, but your suggestion didn't work. Please don't
forget to cc it to me next time.
Best regards,
Damon
On Fri, 7 Aug 2020 at 01:32, Damon qiu <[email protected]> wrote:
> Hi all,
>
> I am using two USRP X310s to transmit signals on 2 channels. The two USRP
> are synchronized through a octoclock-g.
>
> A multi_usrp object is used to control those two USRP, device address is
> set to addr0=192.168.40.2,addr1=192.168.60.2. I want to set two USRP
> transmitting signal at RFA at the same time. I tried two ways to set up the
> tx channel and subdev spec:
>
> Method 1: The TX frontend specification is set to A:0 for both two mboard.
> d_dev->set_tx_subdev_spec("A:0");
> or
> d_dev->set_tx_subdev_spec("A:0", 0);
> d_dev->set_tx_subdev_spec("A:0", 1);
>
> uhd::stream_args_t stream_args(tx_cpu, tx_otw);
> stream_args.channels = {0, 1};
> uhd::tx_streamer::sptr tx_stream = d_dev->get_tx_stream(stream_args);
>
> Method 2: The TX frontend specification is set to "A:0 B:0"for both two
> mboard.
> d_dev->set_tx_subdev_spec("A:0 B:0");
> or
> d_dev->set_tx_subdev_spec("A:0 B:0", 0);
> d_dev->set_tx_subdev_spec("A:0 B:0", 1);
>
> uhd::stream_args_t stream_args(tx_cpu, tx_otw);
> stream_args.channels = {0, 2};
> uhd::tx_streamer::sptr tx_stream = d_dev->get_tx_stream(stream_args);
>
> In the above two methods, there is a certain probability (about 10% to
> 30%) that the two transmission channels are on the same motherboard. I
> guess this is a bug of UHD.
>
> OS: Ubuntu 18.04
> UHD: UHD-3.15.LTS
>
> Please CC me as I can only receive the daily digest of the mailing list.
>
> Best regards,
> Damon
>
_______________________________________________
USRP-users mailing list
[email protected]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
