I still have issues getting them consistently on my TRX-1, No idea why.I programmed it with the same program as my 536. The 536 in my truck picks up Banks County SO plus Fire & EMS but the SDS200 in my home will pick up Fire & EMS only. Makes no sense to me. I've got a discone antenna about 20' above the house; evidently I need a better antenna.
As I stated in my first post, both my SDS 200 and 536 are programmed with the same Sentinel file. The 536 in my truck receives SO along with Fire & EMS. The SDS200 in my house will only receive Fire & EMS. I'm about 10-12 miles from the nearest tower (Baldwin) and up to 30 miles from the other towers.A discone antenna has zero gain. A regular verticle antenna would be much better.
Also, are you passivly trying to monitor, or are you trying to monitor trunked? You may have LCN's not in order.
SDS series are not known for great performance on NXDN not DMR. They are "do everything" scanners, but they shine on simulcast systems.