Hello Niels,
Thanks a lot for your reply. I just tried your suggestion, and it worked as
mint! In the 1st run, ADC self cal was run once;in the 2nd and the following
runs, self cal was skipped completely! superb! that is what I want :)
Really appreciate your help.
Kind regards,H
On Thursday 19 June 2025 at 10:23:39 BST, niels.steffen.garibaldi--- via
USRP-users <usrp-users@lists.ettus.com> wrote:
Hi,
How are you setting your clock/time source?
If you are setting the clock/time source using the `set_clock_source()` or
`set_time_source()` function to set your external sources, you might want to
try setting these via the device arguments when opening your USRP session
(MultiUSRP or RFNoC).
For example use something like this : “addr=<IP of your
x410>,clock_source=external,time_source=external“
The reason for this is, that if you open a session without giving these device
arguments, the session will be established with default arguments, which for
the clock and time source are `internal`(unless otherwise specified in the
mpm.conf).
Then, once you change the clock settings to external after the session already
has been established, it will reinitialize with the new settings. This could
potentially be where the two calibrations you are seeing are coming from.
Regards,
Niels.
zhou wrote:
Hello Community,I have two X410s with UHD 4.5. They are sync with an OctoClock,
so I am using external clock and time.The problem is that whenever I start a
test, X410s do ADC self calibration twice, in the 1st time, they calibrate with
internal clock, and the 2nd time is due to my configuration of external clock.
Self cal takes time.I need to run the test many times for debug, which means
that this self cal is run many times, but all hardware connections and software
configurations are not changed in test, so I hope the ADC calibration can be
done only once and the cal results can be reused (e.g., save in a file and
X410s just load them at the beginning of each test). This will save a lot of
cal time and this is the best solution.If not the best, I can accept a
suboptimal solution - calibrate once rather than twice. This means that I need
to configure external clock in make command. Is it possible to configure make
for this purpose?Any suggestion will be appreciated.Kind regards,H.
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