[time-nuts] Even pulse per second signals

[Mark Spencer]

While I don't have first hand knowledge of CDMA base stations, I recall seeing a symmetricom data sheet that stated that even pulse per second signals were (or are ?) used for timing in CDMA base stations.  Sorry I have no idea why the even pulse per second signal is preferable in that applcation. 

Regards
Mark Spencer

> 
> Some GPSDO have both a 1PPS and a PP2S (pulse per 2 second)
> output. I have two questions for one of you telecom experts:
> 1) What is the history, and the purpose of that PP2S signal?
> 2) What is the official spec for which second the PP2S lands
> on? Is it odd seconds or even seconds? Is it GPS time (easy)
> or UTC (problematic)? If UTC, what happens after a leap
> second?
> 
> Thanks,
> /tvb
> 
> 
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