[ntp:questions] NTP over DRM: RDS on FM only accurate to 100ms and no tracability mechinsim exists

Danny Mayer mayer at ntp.isc.org
Fri Mar 23 03:08:46 UTC 2007

Max Power wrote:
> NPR stations that use RDS are only accurate to within 100ms, due to RDS's 
> time transmission design flaws.
> No accuracy or traceability mechanism exists for RDS-TC (Time Clock, or TS: 
> Time Service) service.
> IP packets are of no meaning here, RDS cannot really encapsulate them.
> This is a non-TCP_IP use of NTP.

NTP doesn't use TCP, it uses UDP. If you mean non-IP use, you cannot
call it NTP without IP since that's the only way the protocol is
defined. Yes it's just the transport but there are parts of the
mechanisms that depend on the behavior.

> NTP is a data transmission format for time separate of its IP4 and IP6 
> multihop measurement mechanisms.

Only partly.


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