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Discussion of precise time and frequency measurement

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Trimble's Mini-T

MT
michael taylor
Fri, May 18, 2007 10:26 PM

I was wondering if anyone knows any details, or has evaluated the
Trimble Mini-T, a "cost effective" GPSDO in a small board form factor.

http://www.trimble.com/minit.shtml
http://trl.trimble.com/dscgi/ds.py/Get/File-361589/022542-007_Mini-T_DS_0207_lr.pdf

The datasheet quotes: "1 PPS Accuracy. . GPS 15 nanoseconds (one
sigma, without SA)"

There is a whitepaper from Trimble which I believe describes the
Mini-T's design as a "Third-Generation GPS Clock" at
http://trl.trimble.com/docushare/dsweb/Get/Document-8439/ (In Sync
with GPS: GPS Clocks for the Wireless Infrastructure).

If anyone knows the cost of board and/or starter kit, I wonder
interested in knowing.

Thanks,
Michael

I was wondering if anyone knows any details, or has evaluated the Trimble Mini-T, a "cost effective" GPSDO in a small board form factor. <http://www.trimble.com/minit.shtml> <http://trl.trimble.com/dscgi/ds.py/Get/File-361589/022542-007_Mini-T_DS_0207_lr.pdf> The datasheet quotes: "1 PPS Accuracy. . GPS 15 nanoseconds (one sigma, without SA)" There is a whitepaper from Trimble which I believe describes the Mini-T's design as a "Third-Generation GPS Clock" at <http://trl.trimble.com/docushare/dsweb/Get/Document-8439/> (In Sync with GPS: GPS Clocks for the Wireless Infrastructure). If anyone knows the cost of board and/or starter kit, I wonder interested in knowing. Thanks, Michael
DB
Dr Bruce Griffiths
Fri, May 18, 2007 10:51 PM

michael taylor wrote:

I was wondering if anyone knows any details, or has evaluated the
Trimble Mini-T, a "cost effective" GPSDO in a small board form factor.

http://www.trimble.com/minit.shtml
http://trl.trimble.com/dscgi/ds.py/Get/File-361589/022542-007_Mini-T_DS_0207_lr.pdf

The datasheet quotes: "1 PPS Accuracy. . GPS 15 nanoseconds (one
sigma, without SA)"

There is a whitepaper from Trimble which I believe describes the
Mini-T's design as a "Third-Generation GPS Clock" at
http://trl.trimble.com/docushare/dsweb/Get/Document-8439/ (In Sync
with GPS: GPS Clocks for the Wireless Infrastructure).

If anyone knows the cost of board and/or starter kit, I wonder
interested in knowing.

Thanks,
Michael

Michael

The datasheet is distinguished by its lack of information on the
stability of the reference when locked to the GPS signals.
Either its so poor that its embarrassing, or they just haven't got
around to measuring ADEV etc.
The phase noise figures quoted re only useful for estimating ADEV etc
for (tau < 0.1 sec) when this is largely determined by the OCXO itself.

Bruce

michael taylor wrote: > I was wondering if anyone knows any details, or has evaluated the > Trimble Mini-T, a "cost effective" GPSDO in a small board form factor. > > <http://www.trimble.com/minit.shtml> > <http://trl.trimble.com/dscgi/ds.py/Get/File-361589/022542-007_Mini-T_DS_0207_lr.pdf> > > The datasheet quotes: "1 PPS Accuracy. . GPS 15 nanoseconds (one > sigma, without SA)" > > There is a whitepaper from Trimble which I believe describes the > Mini-T's design as a "Third-Generation GPS Clock" at > <http://trl.trimble.com/docushare/dsweb/Get/Document-8439/> (In Sync > with GPS: GPS Clocks for the Wireless Infrastructure). > > If anyone knows the cost of board and/or starter kit, I wonder > interested in knowing. > > Thanks, > Michael > > Michael The datasheet is distinguished by its lack of information on the stability of the reference when locked to the GPS signals. Either its so poor that its embarrassing, or they just haven't got around to measuring ADEV etc. The phase noise figures quoted re only useful for estimating ADEV etc for (tau < 0.1 sec) when this is largely determined by the OCXO itself. Bruce