Brian,
Here is a good tutorial on simulcasting requirements and theory.
quasi-sync.atackscomputers.co.uk/SimulcastingWithoutTooManyTears.pdf
If the link does not work Google with simulcasting without tears .
We are in the process of trying simulcast on a couple of bands using the
Motorola Purc5000 paging exciters.
73,
Jay no2g
2a. Re: Simulcast questions
Posted by: "Thomas Oliver" [EMAIL PROTECTED] n8ies
Date: Sat Sep 22, 2007 6:50 pm ((PDT))
First of all do your MSF's have the high stability oscillators in them? All
TX' need to be within a couple hertz on the same freq all the time or the
users will hear a buzz. You will need to delay the audio being fed to the
different TX's varying amounts according to distance between TX's or the
error will also be noticeable especially where coverage areas overlap. The
easiest way to do this is have all transmitters repeating audio coming from
a main link TX on another band.
There is a formula for the delay required somewhere telling how many
milliseconds per mile.
Sounds like you need some old simulcast paging transmitters. Our group uses
UHF PURC (MSF) 5000's with the advanced control boards and high stability
oscillators. The ACB's allow programming of the audio delay and TX freq. As
of yet we haven't done any simulcasting but have talked about it.
Let us know how it works out.
tom
> [Original Message]
> From: Brian Gerry
> To:
> Date: 9/22/2007 5:19:59 PM
> Subject: [Repeater-Builder] Simulcast questions
>
> I am looking to set up a simulcast tx with voted rx system on VHF hi
> band (2 meters) using 3 MSF-5000 digital capable stations, with spectra
> tac rx'ers.
>
> I have the repeaters, and a couple rx'ers, but have not played with
> simulcasting tx'ers.
>
> Can anyone point me towards a "simulcasting for dummies" (oxymoron, or
> just moronic?) type of page?
>
> What equipment will I need for each site?
>
> Will there have to be a "central controller"?
>
> Thanx in advance for any and all help,
>
> Brian
>
> KE6IYC
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