New narrowband RR Frequencies

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Thunderbolt

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Not that I have seen in my area. I was checking over the FCC licenses last week, and to the best of my knowledge, none have been issued at this time on VHF, but there are some issued on UHF. I am sure that as time passes, more licenses will be issued or modified for the new narrowband AAR channels.

73's

Ron
 

KMA367

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hulka said:
Does anyone know if the "narrowband VHF or UHF" frequencies are being used by anyone yet here in the states?
There've been reports, though I can't put my finger on them at the moment, that Union Pacific was/is conducting narrowband testing in the Portland, OR area. I believe they're using APCO P25 modulation, but it could just be analog narrowband.

It will be years before the railroads can replace their tens of thousands of radios with narrowband equipment. There will probably be some localized changes here and there, but I doubt it will happen on a large scale any time soon.
 

Thunderbolt

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hmarnell said:
There've been reports, though I can't put my finger on them at the moment, that Union Pacific was/is conducting narrowband testing in the Portland, OR area. I believe they're using APCO P25 modulation, but it could just be analog narrowband.
The UP has several channels that use P-25 modulation out in the Portland area. In addition, they also have a five channel APCO P-25 TRS. This TRS has been very sucessful and will be expanded eventually across most of the UP System, especially in areas with a high volume of radio traffic. Other areas with lesser volumes of radio traffic, will use P-25 conventional narrowband technology.

Moreover, NS and BNSF, have upgraded many of their licenses to allow for the slow growth of P-25 technology into their radio systems. Apparently, the former has already started the implementation process in Alabama. However, it has been slow to fan-out from there with the activity being limited to yard activity in Birmingham.

73's

Ron
 
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