In the past I have heard an "L" channel using P25.
At first, I had the 123.0 PL set on it, but when I heard the telltale digital sound I changed the mode from CTCSS to FM and it immediately switched from FM to DG.
I've removed the PL's on the L channels for now, the G's and C's remain with the 123.0 tone unless I have reason to modify it.