The "Phase Shift Correction" values (cfr "https://github.com/crsf-wg/crsf/wiki/CRSF_FRAMETYPE_RADIO_ID") returned by the Radiomaster Nomad are quite "bizarre".
It looks like there are 2 mixed streams:
-848000
-825000
625900
-823000
621300
400800
380500
-699000
381100
427000
411600
379800
I did a chart (fig 1) showing the phase shift correction values sent by the Nomad (in nanoseconds).
You can see a drift, which is normal at this point because no corrections were applied, but you can also see a mirror dispersion around the 0 axis.
If I apply all the corrections (positive and negative) the drift is removed, but the result is really noisy (fig 2).
The best result is obtained when I apply only positive corrections (fig 3).
My questions are :
Is this because the nomad has 2 Semtech transceivers ?
Is it an expected behavior?