[App_rpt-users] multicasting.

[Jim Duuuude]

For simulcast ALL OF YOUR TRANSMITTERS NEED TO BE IDENTICAL (ELECTRICALLY).

That means that they need to be the same model of transmitter, and TUNED to be
identical as possible.

So, you need to have the same model of MSF5000 at both sites. That's a darned good
radio for this purpose.

There needs to be a GPSDO (such as a Trimble Thunderbolt), and an RTCM at each transmitter
site. There also needs to be an RTCM and GPS-based timing source physically on the same
LAN as the host computer (which also might be one of the radio sites).

Note, if you are intending to use a current model RTCM (or voter board) for simulcast, you
will need to modify it for simulcast compatibility (which requires injection of external GPS-locked
9.6 MHz for the CPU), or wait until Mark comes out with the new version of the RTCM that includes
the option for this built-in.

Jim WB6NIL

From: petem001 at hotmail.com
To: app_rpt-users at ohnosec.org
Date: Wed, 30 Oct 2013 15:20:15 -0400
Subject: [App_rpt-users] multicasting.





Got a problem with one of my repeater.
 
I live in Montreal QC, and as many of you know we are bless with a small 
mountain right in the middle of the city. (Mount-Royal) While if you have the 
blessing of having a repeater on top of it, the coverage is marvellous. (but I 
am not blessed at all!!!) 
 
So I have nice repeater to cover the north, east, and south of the city, 
but the damn mountain prevent me from covering properly the west part of the 
city. 
 
So I was looking at the rtcm to make a multicast/voter system on the other 
side of the mountain. 
 
I have a MSF5000 UHF at the main repeater site, would I be able to use that 
with the rtcm and I can have a TKR-820 as the remote repeater would I be able to 
use it too? Or I also have a Desktrac that used to be the UHF repeater before 
the MSF500 came along..
 
What would I need to do make sure that its all stable? I think I would need 
at least 2 rtcm, But I would loose the dsp decoding of ctcss and squelch? 
 
Lots of question..
 
Pierre
VE2PF
 
 
 

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