Bigpotter-
Welcome to RR.com!
Are you trying to monitor the following system?
Scanner Frequencies: Jacksonville / Onslow County Trunking System, Jacksonville, North Carolina
If so you might have the scanner in ID Search instead of ID Scan.
If you have the radio in ID Search and it comes across one of the
county EMS talkgroups you would only hear buzzing due to the fact that the County EMS talkgroups are digital and cannot be received by your BCT8.
Look in the 3rd column for the system under "Mode". The BCT8 should be able to monitor the A (Analog) talkgroups but not the D (Digital) Talkgroups which include the County EMS talkgroups.
Give us a little more info on what system you have programmed in so we can accurately help you out.
Thanks and happy Monitoring!
Marshall KE4ZNR