23 Jan
2011
23 Jan
'11
5:58 p.m.
----- Original Message -----
From: "Gary Buhrmaster" <gary.buhrmaster@gmail.com>
Most of the "brand name" GPS NTP solutions have a clock with is more than stable enough to survive without GPS lock for 45 minutes(*). Some of the more expensive units with temperature controlled oscillators have hold times in the many weeks. My guess is that the NTP ripples will be limited to those NTP servers just (or recently) booted which have not yet achieved a stable clock state.
Do such clocks reduce their advertised stratum when doing so? Or are they always considered "GPS-steered", and therefore there's no meaningful change short-term? -- jra