While monitoring the State Police troop A system this morning I was listening to two radio maintenance techs on A1-30 tg 28624 in a lengthy conversation about a cell tower they were at (they did not state there location) and the work they had to do there this morning. Then one tech told the other to go to the digital talk group and see how things worked. At that point I never heard them again. I have my 396t in the search mode looking for new tg's but they never came up again anywhere. I can also monitor troop C from where I am and they were not there either. Anyone know what is going on here? Are the digital talk groups on another set of frequencies? In fact I do not get any state police talk groups in digital (I do other departments ) Does anyone?