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Re: Narrow Band Radio? Hobart Intermodal
Author: RRR
Date: 12-15-2011 - 13:34

I have anecdotal experience the D-Star digital mode has extended range vs. analog. But digital modulated signals are much more spectrum "noisey" than analog. You can see it if you on a Spectrum Analyzer. The Utah VHF Soceity did a study whch shows this.

As for previous obsevations that that there are "bleedover problems" on the present 15kHz channels, it would be interesting to know to what extent they are. Here in Southern California, UP, MetroRail and the San Diego Trolley use DCS and PL tones now that so many channels have been added. BNSF uses them only on the mobile side of their "PBX" pair and the aforementioned intermodal simplex channel.

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Subject Written By Date/Time (PST)
  Narrow Band Radio? Hobart Intermodal RRR 12-13-2011 - 18:36
  Re: Narrow Band Radio? Hobart Intermodal Mark 12-13-2011 - 21:38
  Incredible waste of money! West Coast Engineer 12-14-2011 - 15:22
  Re: Incredible waste of money! Shortline Sammie 12-15-2011 - 19:39
  Re: Narrow Band Radio? Hobart Intermodal RRR 12-14-2011 - 18:45
  Re: Narrow Band Radio? Hobart Intermodal Mr. Guy 12-14-2011 - 21:22
  Re: Narrow Band Radio? Hobart Intermodal fkrock 12-15-2011 - 09:48
  Re: Narrow Band Radio? Hobart Intermodal RRR 12-15-2011 - 13:34
  Digital radios: A possible death trap RBK 12-15-2011 - 16:16
  Re: Narrow Band Radio? Hobart Intermodal West Coast Engineer 12-16-2011 - 13:15
  Re: Narrow Band Radio? Hobart Intermodal Mark 12-15-2011 - 18:07
  Re: Narrow Band Radio? Hobart Intermodal fkrock 12-16-2011 - 11:09
  Re: Narrow Band Radio? Hobart Intermodal RBK 12-16-2011 - 13:32
  Re: Narrow Band Radio? Hobart Intermodal Mistertower 12-16-2011 - 16:34
  Re: Narrow Band Radio? Hobart Intermodal RRR 12-16-2011 - 17:23
  Re: Narrow Band Radio? Hobart Intermodal Uninformed 12-17-2011 - 10:52
  Re: Narrow Band Radio? Hobart Intermodal Shortline Sammie 12-17-2011 - 11:42
  Re: PD Channels in LA Basin Explained Mistertower 12-18-2011 - 15:19
  Re: PD Channels in LA Basin Explained RRR 12-21-2011 - 16:18


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