Thanks for the useful info. Very interesting. On a somewhat similar topic, we ran into a situation where the local Motorola shop sold a local entity a repeater and several portables using a DPL code that only certain models of Motorola have. We checked every Kenwood, Vertex, and even some other Motorola models and none could do this particular code. I found a work around for the lack of reverse burst. I am using a Tait exciter which has its own hang timer. I just set that timer to hold the carrier up for a fraction of a second after the 38A drops out. This gives the PL decoder in the mobiles/portables time to close the squelch before the carrier drops.
--- In Repeater-Builder@yahoogroups.com, wd8chl <wd8...@...> wrote: > > Eric Lemmon wrote: > > The TS-64 does indeed encode a reverse burst STE signal. Unfortunately, it > > has the 180-degree phase shift, because that is really easy to do. It > > cannot encode a 120-degree phase shift, so that means it is fairly useless > > with Motorola and a few other radio brands. When I contacted Comm Spec > > about this a few years ago, the engineer I spoke with seemed not to know > > that there are two standard reverse burst formats. > > > > 73, Eric Lemmon WB6FLY > > > > I wouldn't be too worried about it. An awful lot of Motorola's will do > OK with 180 shift, especially higher-tier radios. > But then there's some that are just weird. I have a Maxar-80 on GMRS. It > doesn't like the Com-Spec TP-3200 tone panel. It also doesn't like the > P-100 handheld on talkaround. But it does like the GE MPA and Phoenix-SX > I have. Go figure. > The Micor repeaters with a factory reed decoder however, seem to be > pretty liberal on what they respond to. Just about any radio with RB > will be at least partially muted. The TK-805D has a really short delay > on the STE drop out, so the decoder doesn't get a chance to fully spin > down before the transmitter goes away. But just about any other radio > worked OK. > I'd leave it, frankly. >
