[App_rpt-users] RTCM Narrow band voting..

Tim Sawyer tim.sawyer at mac.com
Tue Oct 28 23:55:48 EDT 2014


RTCMs work fine on narrow band 900Mhz Quantars. I have no experience with any other narrow band radios.

Just set the dev at half (1.5 instead of 3Khz)… inject 1.5 then set the RX LEDs like normal. For TX generate the milliwatt tone and set to 1.5 on the service monitor. Set both levels with no CTCSS.
--
Tim
:wq

> On Oct 28, 2014, at 9:24 AM, Fredric Moses <fred at moses.bz> wrote:
> 
> Hello we are working on a grant were we might be getting a stack of RTCM’s in for our amateur digital network.  We currently have 18 XPR8400’s online running in IPSC mode.  The channels are narrow band coordinated but we have also put analog channels in each of the repeaters so if poop happens we can flip from digital to analog.  Our thought was to stick RTCM’s on the back of them to handle the analog side.  And as we have some digital voted sites we would also then have analog remote RX’s..   We currently have a few analog sites running the RTCM’s for voting/simulcast now.. but those are on 25khz coordinated ham channels. where as this would be running narrow band.  
> 
> Just wondering the gotcha’s when setting levels on the gear for a 12.5khz vs 25khz channel and the Null’s...
> 
> --
> Fredric Moses - W8FSM - WQOG498
> fred at moses.bz
> 
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