I am now on " site hold " with Jefferson now and will monitor for a bit. I have one or two signal bars and can see DAT. is the range with P25 simulcast less than conventional ?
P25 simulcast systems have many tower sites in a cellular configuration. Each County "Site" towers are designed to cover a specific area. So, a well designed system will have minimal coverage outside of the intended service area. Also, most scanners can not handle receiving signals from multiple transmitters in P25 simulcast so will work only if you happen to be in an area with a clearly predominant signal.
I suspect you have a clear shot across Lake Ontario to one Oswego tower site so your 436 is able to receive it.
If you are seing steady DATA when idle and P25 when receiving a signal and the signal bars are not fluctuating wildly, you are probably in a good signal area.
In any event, scanning more than one site or mixed trunk and conventional scanning you are likely to miss activity on the trunked systems unless you have good, stable, signals since the scanner has to constantly re-sync to each control channel as it scans.