Originally Posted by mm43
auv-ee;
Quote:
" ... the signal is a tone burst filling only 1% of time (10msec/1sec)."
Not a good basis for PLL capture, bearing in mind that the ULB oscillator is most likely R/C with inherent phase shifting and possibly small frequency changes as the battery voltage drops.
I assume we are in agreement. That's another way to put the point I was trying to make.