[ntp:questions] Fw: NTP and Trimble TSIP
Brian.Inglis at SystematicSw.ab.ca
Wed Feb 17 05:52:19 UTC 2016
On 2016-02-16 19:28, Paul wrote:
> On Tue, Feb 16, 2016 at 7:40 PM, Brian Inglis <Brian.Inglis at systematicsw.ab.ca <mailto:Brian.Inglis at systematicsw.ab.ca>> wrote:
> This module specs don't mention frequency output other than 1PPS which is specced within 60ns, so much better than almost all. If it also supports TRAIM and sawtooth correction, the driver can improve on that.
I was referring to his current Copernicus II, which also seems to support Static 2-D position hold mode, TRAIM, and runs from a 16.384MHz+/-5kHz TCXO +/-60ns, so pretty decent for the money.
> See http://www.trimble.com/timing/ICM-SMT-360.aspx.
> This is $50 quant. 1 Resolution SMT with a $2 TCXO (the 10MHz is presented on pin 23).
> It's GPSDO but it's not a T-bolt E. 24 hour hold-over 100x10^-9 vs 1x10^-12 .
Looked at that, pretty nice, but holdover is only specced up to 300s, +/-7us for 60s, so +/-117ppb: YMMV depending on antenna quality, location, and sky view, LNA and cable length matching to receiver optimum, and cable delay compensation accuracy.
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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