On 27/04/2023 11:39, david.fernan...@viveris.fr wrote:
Hi Marcus,
I tried to wait 1 minute before starting a new test and it has no
impact. Here are the logs displayed by GNU Radio of 2 successive
tests, the first was successfull and the second launched 1 minute
later failed.
1st TEST (successful) :
Generating: '/home/davidfernandes/tests_gnuradio/tutoriel_usrp_gnu.py'
Executing: /usr/bin/python3 -u
/home/davidfernandes/tests_gnuradio/tutoriel_usrp_gnu.py
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use
QT_QPA_PLATFORM=wayland to run on Wayland anyway.
[INFO] [UHD] linux; GNU C++ version 11.3.0; Boost_107400;
UHD_4.1.0.6-0-g1a5b4fd2
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 1472 bytes.
[INFO] [X300] Radio 1x clock: 200 MHz
[WARNING] [MULTI_USRP] Could not set RX rate to 0.280 MHz. Actual
rate is 0.279 MHz
[WARNING] [MULTI_USRP] Could not set RX rate to 0.280 MHz. Actual
rate is 0.279 MHz
[WARNING] [MULTI_USRP] Could not set TX rate to 0.280 MHz. Actual
rate is 0.279 MHz
[WARNING] [MULTI_USRP] Could not set TX rate to 0.280 MHz. Actual
rate is 0.279 MHz
[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.
[WARNING] [0/Radio#1] Attempting to set tick rate to 0. Skipping.
[WARNING] [0/Radio#1] Attempting to set tick rate to 0. Skipping.
[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.
>>> Done
2nd TEST started 1 minute later (Failed) :
Generating: '/home/davidfernandes/tests_gnuradio/tutoriel_usrp_gnu.py'
Executing: /usr/bin/python3 -u
/home/davidfernandes/tests_gnuradio/tutoriel_usrp_gnu.py
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use
QT_QPA_PLATFORM=wayland to run on Wayland anyway.
[INFO] [UHD] linux; GNU C++ version 11.3.0; Boost_107400;
UHD_4.1.0.6-0-g1a5b4fd2
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 1472 bytes.
[INFO] [X300] Radio 1x clock: 200 MHz
[WARNING] [MULTI_USRP] Could not set RX rate to 0.280 MHz. Actual
rate is 0.279 MHz
[WARNING] [MULTI_USRP] Could not set RX rate to 0.280 MHz. Actual
rate is 0.279 MHz
[WARNING] [MULTI_USRP] Could not set TX rate to 0.280 MHz. Actual
rate is 0.279 MHz
[WARNING] [MULTI_USRP] Could not set TX rate to 0.280 MHz. Actual
rate is 0.279 MHz
[WARNING] [0/Radio#1] Attempting to set tick rate to 0. Skipping.
[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.
[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.
[WARNING] [0/Radio#1] Attempting to set tick rate to 0. Skipping.
>>> Done
I see no difference betwen the logs of a successful test and the logs
of a failed test.
The version of UHD is UHD_4.1.0.6-0.
Thanks again for your support.
So, 280Ksps isn't a valid sample rate -- sample-rates must be full
integer fractions of the master clock rate, which in your
case is 200MHz. Try something like 1Msps or 0.5msps just for
purposes of a test. Also bump your RX gain up to about 20.
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