I read where you said you were not hearing anything. My first thought was your receiver conditions. What are you using? What antenna? Coax? What is around you for VHF transmitters and FM stations. If you are using a new GRE scanner, do you have an FM broadcast filter? On a clear frequency how many signal bars do you see on the display?
If you live anywhere near NYC you should hear something! But I know what a high RF area NNJ is and how it can trash a scanner receiver without good filtering. When I was up there I ran filters (modded ham radio diplexers and triplexers) to minimize images and overload. Then I would look for a location with a vantage point that had visibility "over" NYC, but not near any transmitters that would overload the scanner. The Palisades rest stops were great! I heard so much there. The best!
Put in the well know (on the wiki) national freqs for the major agencies. DEA, BATFE, USSS, CBP (it is a national plan!), and USMS. You have to hear something, although these are P25 digital so you will need a digital scanner. If you still can't hear anything, you have a receiver problem and may need filtering. The "attenuator" doesn't fix a thing...filtering does.
Good luck.
Phil
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