Has Maryland Aviation Administration rebanded?

lebrunmn · #1 (**permalink**) 10-19-2009, 08:57 PM

Does anyone know if there has been a change with the Maryland Aviation Administration TRS or have they possibly rebanded? I noticed today that their normal control channels weren't active, but was able to find a control signal on 867.325, one of their normal voice channels. It seems to be showing the correct SYSID: 1BA, but it doesn't seem as though I'm able to correctly follow conversations. When I do get snippets of conversations, I'm seeing different voice channels come up: 854.4625, 859.1375. From looking at the Wiki, these freqs look like they might be in the rebanded area. If it has rebanded, I guess I'll need to add a custom trunking table for my pro-96.

Anyone know something about this system?

Thanks,

lebrunmn · #2 (**permalink**) 10-19-2009, 10:48 PM

The system seems to be coming in better since I added a MOT 9600 CC multi-table, and selected the 9600 CC 800MHz plan. I'm now able to follow comms, and can hold on talkgroups. Will listen for another few hours before submitting something to update database listing.

Dispatcher308 · #3 (**permalink**) 10-21-2009, 11:23 AM

The system is still operating on its original frequencies however, there is something that is covering the control channel, I was near 1 of the sites yesterday and I could not get the scanner to lock control channel.

lebrunmn · #4 (**permalink**) 10-21-2009, 01:30 PM

Thanks, Nathan-

I thought it was just me... So looks like it's time to dust off my Pro96Comm or Unitrunker, and see what's what. If I find something out, I'll post it.

Regards,

lebrunmn · #5 (**permalink**) 10-24-2009, 01:37 AM

I ran the very helpful Pro96comm program against this system tonight... noted "new" freqs on the system. The freqs carrying the bulk of the voice traffic were 854.4625 and 859.1375. These are licensed to two other MAA--MDOT systems... not sure what's up with this, possibly a combining of three MAA-MDOT systems into one? The system was definitely using 867.3250 as the control freq.

Despite my initial thoughts that this system had rebanded, that doesn't appear to be the case. It looks as though all you need to do is add the extra control freq to keep monitoring this system.