[time-nuts] GLONASS receiver
magnus at rubidium.dyndns.org
Sun Aug 5 21:19:34 EDT 2012
On 08/06/2012 02:42 AM, Hal Murray wrote:
> magnus at rubidium.dyndns.org said:
>> Many cell applications require 50 ppb.
> What is the context for that?
> I'm not a cell-phone wizard. I think they have two problem areas: frequency
> and time.
> 50 ppb makes sense for frequency. It doesn't say anything about time.
GSM and derivates have +/- 50 ppb as frequency requirement, no time
Later derivates add time requirements.
See ETSI and 3GPP specs, as freely available online.
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