I just got a HP-1. It doesn't seem to work on Trunking? It just locks on the control channel and buzes? Is there more you have to do to receive Trunking or is it supposed to receive with just the database?
Sounds like maybe you are hearing data channel or some kind of scada channel. Where are you located and what system are you listening to? Also what talk group does it display when you hear the buzzing noise.
With that information I should be able to help you more,
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