The killer on these simulcast systems is in the overlap areas. If the transmitters are only a few miles apart, you could see some real problems, since most everywhere is an overlap area. A rule of thumb is that a simulcast system will never sound as good as a non-simulcast system in the overlap areas. If the transmitters were further apart, and the overlap area fell into "no man's land", then it might work OK.
We have one here, and in the overlap areas audio sounds funny or "buzzy", etc. If there is anyway around a simulcast system, it might be better. These systems tend to be costly and hard to set up, and keep aligned. Read this article for some more insight, but remember that it was written by the president of Simulcast Solutions. http://www.simulcastsolutions.com/PDF/Simulcast.pdf Joe --- Daron Wilson <[EMAIL PROTECTED]> wrote: > > > I guess I wasn't clear enough. I'm familiar with > the simulcast paging, this > is not paging. This is public safety police analog > repeaters. The proposal > is to put three in a row down the town, about 3-4 > miles apart, voting > receivers at the two south ones linked back to the > 'main' site via UHF > control links and a voting controller there. So, > they would vote the best > receiver and simulcast the output of all three > repeaters. Not paging, I > know how paging works, I have a VHF pager on a > simulcast system. What I'm > looking for is somone who has seen an installation > like this or has > experience with it. Personally, I think it will > multipath like crazy and > the recovered audio will be crappy. But, if it is a > good thing as suggested > in the recommendation, there must be operating > systems out there to listen > to. > > Thanks, > > [EMAIL PROTECTED] > > Daron > > -----Original Message----- > From: [email protected] > [mailto:[EMAIL PROTECTED] On Behalf > Of Paul Finch > Sent: Tuesday, May 03, 2005 7:07 AM > To: [email protected] > Subject: RE: [Repeater-Builder] voting receivers > with simulcast transmitters > > Daron, > > I will tell you what I know about analog simulcast > systems. There is > basically two manufactures of this equipment, > Motorola and > Quintron/Glenayre. If you want it to be a fairly > good sounding system stay > away from Motorola equipment. I worked in paging > back when there was still > a lot of analog pagers on the air, half our systems > were Motorola, the other > half Quintron. We finally gave up on the Motorola > systems running analog, > you could set them one day and they may work OK but > the next day they would > not. There is a problem how the built their FSK > modulators, they were not > matched like Quintron's. The Quintron modulators > were matched to .2 of a dB > between them, Motorola did no matching. > > The trick that will help the most with either system > is; try and keep the > overlaps where people will not be using the system. > > There is other problems with Motorola's simulcast > system but that is what > kept them from having a good (as possible) running > simulcast system. > > There is still a company in Quincy Il. that sells > the Quintron (now > Glenayre) line, their company name is ISC > Technologies. They have the > manufacturing rights for most of the > Quintron/Glenayre line or they may have > some used equipment available. > > Paul > > > -----Original Message----- > From: [email protected] > [mailto:[EMAIL PROTECTED] Behalf > Of JOHN MACKEY > Sent: Tuesday, May 03, 2005 2:00 AM > To: [email protected] > Subject: Re: [Repeater-Builder] voting receivers > with simulcast > transmitters > > > Daron- > > Most all your 150 MHz or 900 MHz paging systems are > going to be simulcast. > If there are any 150 MHz analog paging systems > around, try listening to > them. > > ------ Original Message ------ > Received: Tue, 03 May 2005 01:26:06 AM CDT > From: "Daron Wilson" <[EMAIL PROTECTED]> > To: <[email protected]> > Subject: [Repeater-Builder] voting receivers with > simulcast transmitters > > > Hello Folks, > > > > I'm looking over a radio study done by consultants > for our small coastal > > community. The recommendation includes three > simulcast repeaters with > > voting receivers. We live on the coast, the > terrain is covered with tall > > trees that make wonderful reflectors and > contribute tons of multipath when > > wet, and it rains plenty. I can't think of any > place with terrain issues > > where I have seen a simulcast VHF repeater system > built out. > > > > If you have any references (for or against) a > simulcast system like this, > > please drop me a note. I suspect a fair amount of > multipath problems and > > not real great audio for the mobile units based on > their location, but I > > wouldn't be able to prove it until the thing got > installed. > > > > Ideas? > > > > Thanks, __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
