[time-nuts] UBlox GPSDO

jpbridge at aol.com jpbridge at aol.com
Thu Apr 16 16:38:28 EDT 2015


Ublox have a white paper/app note on using their timing modules (mainly the LEA-6T I think) as a frequency reference. The main thing is that there is a lot of jitter at 10MHz (much less at 8MHz) so you need to phase lock another oscillator to it.

James

 

 

 

-----Original Message-----
From: Wayne Holder <wayne.holder at gmail.com>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Thu, 16 Apr 2015 19:43
Subject: [time-nuts] UBlox GPSDO


According to page 51 of the protocol manual for the UBlox NEO-M* series
GPS
modules, the timepulse can be programmed to output a 10 MHz signal
rather
than a 1 PPS
signal:


http://www.u-blox.com/images/downloads/Product_Docs/u-bloxM8_ReceiverDescriptionProtocolSpec_(UBX-13003221)_Public.pdf

I'm
curious if anyone has tried this.  Seems like a possible way to get
an
inexpensive GPSDO, as these modules are very
inexpensive.

Wayne
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