Regarding what you want to do... there are two basic forms of linking... the type you're trying to do with more than two repeater sites/systems is often called "chain linking" where the center repeater site/station/location passes the communications onward to a third and fourth distant locations. You'll notice my first reply post was specific to mention a two site layout.
Two ways to make up the multi site system you're asking about. The first and best way to go is to find some type of a repeater controller that supports chain linking. The link radios I described in my original example simply connect to the repeater controller and the rest is done with programming. You can also buy the RLS/RBS-1000 board from CAT Auto if it supports chain linking. You'll have to ask them... it's a uP driven board so the firmware can be updated/modified to be a chain or hub operation. How practical that is to get done is another story. One rude and un-practical way to complete a multi-site linking system is to use the two-site system layout I described earlier at each end site of the system. Mid system located Repeaters with more than one path in and out chain function simply have two back- to-back connected radios for each link path. One of the b2b radios is programmed up to a distant repeater link frequency pair and the other onto the main repeater channel. You would need one pair of back-to-back radios for each remote repeater site you wish to include into the system. Yeah all things considered it does work pretty well for what it is. cheers, s. > "Kerincom" <[EMAIL PROTECTED]> wrote: > I will have a look at the circuit and see .The problem we found > with link setup 1 upper design is we could not have one link > radio on one site and one on another site as when the site 2 > link stops transmitting and rx site 1 tail retrips site 2 and > keeps them on .Another problem was while s1 link in > transmitting s2 receiver is trying to pick up the incoming signal and s1 > link transmission at the same time . > With link setup 2 while link 2 is transmitting it carn't receive and when it > switches back to rx and receives a signal from site 1 the only place that > signal goes is to s2 transmitter.Our 5 open repeaters are all linked this > way and the sites only transmit when a user activates one of them .We > experience no delays and the users find it unreal .Each repeater is ctcss > protected including the link using the same ctcss tone .The only difference > between our private and the open system is we use a tone panel to control > the sites.Depending which user activates the system the tone panel will > decode and retransmit it to either the other site or the users mobile. > With link setup 2 I know that the users on one repeater have to wait while > another user is using the system before they can use it but since our users > are more interested in more coverage and privacy this shouldn't be a problem > as our users only use the system for business calls and use the setup a > couple times a day and 90% of the day sits idle > > Thank You, > Ian Wells, > Kerinvale Comaudio, > 361 Camboon Road.Biloela.4715 > www.kerinvalecomaudio.com.au > > -------Original Message------- > > From: Jim Brown > Date: 4/01/2008 2:48:42 AM > To: [email protected] > Subject: Re: [Repeater-Builder] Linking two shared repeaters > > Ian, I think you missed my comment on the way the > extra receiver implementation would work. I proposed > using a circuit that gives priority to the regular > repeater receiver for that system. This would lock > out the auxillary receiver during input on one > repeater, and by transmitting CTCSS only while a user > is active, there would never be a case where both > auxillary receivers would be enabled, so that locking > the two together continuously would not happen. I > even have a custom circuit that I have posted to the > group that provides that priority to one receiver. > > I still think it is a viable solution to linking two > repeaters together, but I have not implemented it so > can't be for certain sure. I'll be interested in your > solution if and when you get it implemented. > > 73 - Jim W5ZIT > > --- Kerincom <[EMAIL PROTECTED]> wrote: > > > Thanks Jim .The main idea is that our business > > clients can have some extra > > range and also retain privacy so other users that > > share it carn't hear the > > other businesses on the channel.We only currently > > have 3 businesses that > > share the 1st site each with their own ctcss > > tones.With your second > > paragraph we found that having a separate link radio > > at each end could > > possibly cause continous linking of the sites and > > lock the repeaters > > together in transmission > > __________________________________________________________ > Be a better friend, newshound, and > know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/ > _ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ >
