Okay, so it's the holidays, with mandatory days off for state employees, I'm bored, so I decide I'm going to use my nice, shiny, brand-new TV28T DVB-T USB SDR and a really cool app called SDR# (if you're as bored as I am and curious, the Software Defined Radio forum is pretty busy about that and other hardware and SDR apps), and another cool app called DSD (mentioned in the Wiki) to try and get a handle on how many MOTOTRBO installations are working around the Baltimore area. A lot of them are data-decodable but voice-undecodable (encryption?), but I stumbled across one frequency where DSD can decode the voice. After some detective work, it appears to be one of the voice channels for the Johns Hopkins Blue Jay Shuttle dispatch. The BJS goes from a fixed-route to an on-demand schedule sometime in the afternoon, though the FAQ and the radio traffic don't really jive (www.nextbus.com). Anyhoo, an FCC lookup on the frequency points to MD MIEMMS as the holder of pretty much all the licenses on that frequency and 15kHz either way. No mention of JHU. Or anyone else, for that matter. 463.0725 is what I'm seeing. I'm pretty new at this SDR thing, but could I be getting an image? I can't imagine an image at that frequency range being powerful enough to be able decode digital voice, but I was wondering if anyone else can hear the data?
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