I guess I am fortunate because my 996P2 scanners (and my 325P2) work quite well on the simulcast systems in my area (as well as VHF receive, etc). But it took a lot of experimentation to get to this point. It didn’t happen right out of the box.
It doesn’t work well on ALL of the systems at the SAME time, because I find each system (simucast and Smartzone systems in my area) require different P25 Threshold settings. I have to dedicate a 996P2 to a particular system, in order for it to receive well, because I have to adjust the P25 Threshold setting for the system. For example, Chester County may require a setting of ‘7’, which will cause Montgomery County to come in garbled, as it prefers a setting of ‘11’. Berks County may want a setting of ‘5’, so I don’t believe you can monitor several systems well with these scanners.
Also, I have had my best results monitoring the simulcast systems, by using a small, cheap “mini dipole” scanner antenna, such as this
UHF/800 mini dipole
I guess this little antenna has attenuated the other towers’ signals sufficiently, to allow me to receive well. I had tried many different antennas, and had little success until trying this one. Having a length of coax attached to it, allowed me to find a ‘sweet spot’ for reception.
What ever the reason, I enjoy excellent reception of my county simulcast system with my 996P2, as well as other P25 systems (Phase 1 and 2). The control channel does change occasionally, requiring I adjust the P25 Threshold setting, but this set up, along with the recent firmware update and NXDN upgrade, makes my 996P2 scanners a great value...for me. I understand why people will say ‘you need an SDS scanner to monitor simulcast systems’, but in my case, it is simply not true.