Re: Simulcast questions In addition to the high stab oscillators and the voice audio delay lines, the ctcss / dcs signaling is also treated as it's own animal, which most often means time delay and qty value. People do fudge ctcss / dcs operation within the voice audio delay line, but it's not the pro way to go.
Dependent on how the signal reaches the remote sites, there will/might also be group delay issues to be dealt with. The fun part about using older paging transmitters for voice audio is the missing hardware for the right way to include ctcss signaling. cheers, skipp > "Thomas Oliver" <[EMAIL PROTECTED]> wrote: > > 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 <[EMAIL PROTECTED]> > > To: <[email protected]> > > 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 > > > > > > > > > > > > Yahoo! Groups Links > > > > > > >
