I am currently attempting to demodulate a somewhat abnormal PSK signal with the AX5243, I find the documentation regarding PSK lacking, so I’ll try here.
I have seen table 21 in the Datasheet (also attached), as well as the description here on the forum (ref. KB: How to enable PSK modulation and control phase transitions on AX5043).
Specifically I would like to ask about the phase transitions always being 180 degrees.
The signal I am looking at is modulated at +/- 1rad, baud rate 400 bps Manchester encoded. Is that even possible and if so is there a more thorough description of the registers involved?
I do not know a whole lot about this area so there can potentially be a lot of stuff wrong with my setup, I have been monitoring the radiostate and rssi.
While the signal seems to be fine, I never pass the initial preamble state, which got me looking into the actual PSK modulation scheme in use and found that the phase is not applied as the AX5243 seems to expect.
Before throwing even more effort into debugging, it would be nice to know that it is at least possible to achieve - and perhaps a few pointers on where to look.