"Chris Albertson" <albertson.ch...@gmail.com> wrote in message news:aanlktimwu-ezzxv9pp-gbg9mft1ylhsf9edrdzlkj...@mail.gmail.com...
> I can't defend the design of CDMA cell technology. But I'm sure a lot > of it was driven by trying to get as many calls as possible into a > limited bandwidth. Another requirement for precision timing comes > from the need to measure the signal's speed of light delay. They use > this to locate a phone by noting the differences in the delay to > several towers A uS is about 1000 feet so they need to do this far > better than to a uS. There are lots of other systems that will break as well that people didn't think of; Clustered microwave links Clustered WiMAX and point to multi point data access points TETRA P.25 (I think depending on the configuration) Motorola SmartZone & SmartNET (Depending on configuration) Digital Quazi/Simulcast radio networks (Mototurbo) Some of those platforms accept any valid clocking source but most depend in there default setup on GPS. So far as time of day goes - The people's systems I deal with have S0 GPS and MSF or DCF77 inputs to there S1 devices so that will be fine - Alas we don't have any proper caesium clock sources. _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
