Re: [USRP-users] Re: N321 LO sharing between RF 0/1

[Paul Atreides]

Ok, so I tried setting the LO distro from a python interactive shell. The lights come on. Then I disconnect from the terminal. The lights stay on.

Next I start my flowgraph with the rest of the configuration options (LOs set to export, timing ref, etc). When the flowgraph runs, the LO output lights are still on.

I'm confirming now if the LO is coming out of those ports.

On Tue, Jan 18, 2022 at 5:07 PM Daniel Estévez <daniel@destevez.net> wrote:

Hi Paul,

Would this work if you run these calls before the gr-uhd code in the
flowgraph instances the device? This can be tested by inserting the code
manually. It could be a solution, but I'm not even sure if you can
insert a Python snippet in that location. However, if gr-uhd resets
these settings when initializing the device, then this approach won't work.

Best,
Daniel.

El 18/1/22 a las 22:59, Paul Atreides escribió:
> wow, thanks Daniel!
> I just bumped an issue on the GNURadio github here
> <https://github.com/gnuradio/gnuradio/issues/5104> I've cross-linked my
> comments to gr-ATA as well.
>
>
> <https://github.com/gnuradio/gnuradio/issues/5104>
> the python code i'm using to enable the LO distro in the UHD python API is:
> import uhd
> import numpy as np
> usrp = uhd.usrp.MultiUSRP()
> usrp.get_tree().access_bool("/blocks/0/Radio#0/dboard/tx_frontends/0/los/lo1/lo_distribution/LO_OUT_0/export").set(True)
> usrp.get_tree().access_bool("/blocks/0/Radio#0/dboard/tx_frontends/0/los/lo1/lo_distribution/LO_OUT_1/export").set(True)
> usrp.get_tree().access_bool("/blocks/0/Radio#0/dboard/tx_frontends/0/los/lo1/lo_distribution/LO_OUT_2/export").set(True)
>
> i'm not sure how to work that into a python snippet yet as I think
> gr-uhd will claim the radio once the graph is started.