Hi Phil, I've tried changed the SPDREVS and other parameters but didn't work. I found some other interesting thing.
I test the EVM with Fclkin=200Hz
The first picture shows with SPEED=1000, LOOPGAIN=300, LOCKn is active(channel3) with FGout frequency=112Hz not equal to Fclkin
The second picture shows with SPEED=2000, LOOPGAIN=100, LOCKn is inactive(channel3) with FGout frequency=120Hz not equal to Fclkin
both FGout frequency doesn't match with Fclkin, but the LOCKn is different, thus the commutation is different, I wonder why this happened.