On 09/20/2018 04:14 PM, Yun Li wrote:
Hi Marcus,
Thanks for the clarification. We do have a need to map the streaming
channel index back to the channel id. Is there a fixed mapping
formula? For example, if we are streaming channel 1 and 3, then 0 in
the UDP means channel 1 and 1 in the UDP means channel 3 and so forth?
Thanks.
Yun
It depends on the order in which you specified your hardware channels in
the subdev spec when you created the device object and streamer.
2018-09-20 20:11 GMT+00:00 Marcus D. Leech via USRP-users
<usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com>>:
On 09/20/2018 03:58 PM, Yun Li via USRP-users wrote:
Hi there,
We are capturing UDP packets while streaming multiple channels
(RX channel 1 and 3 in particular) from N310
(UHD_3.13.0.2-1-g78745bda). Looking at UDP packets, it seems
that the channel id field in the VRT header is actually set to
0 and 1. I expect the value would be 1 and 3. Is there a
particular reason for that or am I reading it in a wrong way?
BTW, I also did another test with streaming channel 1,2,3 and
the UDP packets show 0,1,2.
Thanks.
Yun
That's just the streaming channel index. If you're only streaming
2 channels--it's the streaming channel number, not the physical
channel number.
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com <mailto:USRP-users@lists.ettus.com>
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
<http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com>
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
