Hi The whole “offset frequency” simulcast thing is pretty old. It most certainly pre-dates GPS. It’s actually old enough that the first OCXO I ever designed at Motorola went into that kind of system. The “time sync” thing came along a while after that.
There’s always been a lot of infrastructure gear that goes on chugging for a *long* time. Budgets are pretty skinny for a lot of very important stuff. That doesn’t just go for the gear, it also goes for the payroll to support them. Maybe it should not be so, but in most of the places I’m aware of, it is. Bob > On Aug 11, 2017, at 12:26 PM, Tom Van Baak <[email protected]> wrote: > >> The E911 installation, in the news, is just one of several. Others are >> hospitals, >> fire stations, etc. using different dispatch systems. > > Hey, at least important things like mobile phones, ISP's, Google, Amazon, > FedEx and Starbucks aren't affected ;-) > >> In a wide-area simulcast-overlap paging system, the transmitters in the same >> coverage area are carefully set to all transmit at exactly the same time. > > That's fine. And very clever. But why is this "life safety" system tied to > GPS, to a particular vendor, to a particular model of receiver (that clearly > states in the _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
