On 01/22/2019 10:36 AM, Emanuel via USRP-users wrote:
Hi all,
I’m using a single TwinRX in an X310, and want to stream from the two
channels tuned to the same RF frequency. The second channel shall use
the LO of the first channel.
I configured the RF frequency through the set_rx_lo_freq for LO1 and
Channel 0, and set the rx_lo_source of Channel 1 to companion.
Streaming I/Q samples shows me, that the RF front-end is not really
tuned to that frequency. I only observe noise. I remove the second
Channel from my source code (no change in result), and then tried to
set the RF frequency via set_rx_freq with integer-n tuning. The latter
version worked, showing me correct I/Q samples.
Question to Ettus team: how do you correctly configure the receiver
frequency for TwinRX: over the advanced functionalities of the TwinRX
as described in the knowledge base, or via set_rx_freq + setting
lo-source.
Best regards,
Emanuel
If you look at this article:
https://kb.ettus.com/Direction_Finding_with_the_USRP%E2%84%A2_X-Series_and_TwinRX%E2%84%A2
And the code here:
https://github.com/EttusResearch/gr-doa
You can get good examples of how to set-up the TwinRx for proper shared LO.
Also, what version of UHD are you using?
_______________________________________________
USRP-users mailing list
[email protected]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
