I had a chance to travel through some simulcast sites on the statewide P25 system here in Illinois (
STARCOM21 Statewide Illinois P25 Trunking System, Statewide, Illinois - Scanner Frequencies ) over the past few days and I'm still having issues with decoding using firmware 2.06.08 on towers 101, 102, and 113. When on the outskirts of the sites I would get *some* reception, but as I traveled further into the areas, the HomePatrol went silent.
I had a BCD396XT with me connected to the same kind of antenna (Maxrad 7603S) located on the opposite side of the trunk and it was full of activity on the same sites.
It's kind of hard to explain, but the signal meter on the scanner would fluctuate between full strength and nothing on the simulcast towers.
What was interesting, however, is that if I put the HP-1 into Analyze System mode in an area where it was silent (or near silent) on the receiving end, it would show plenty of activity and not seem to drop the control channel.