[time-nuts] UBlox as a reference clock source - accuracy ??

David Slipper softfoot at hotmail.com
Thu Jun 20 13:51:01 UTC 2019


Thanks, I'll look at that :-)

On 20/06/2019 10:04, Askild wrote:
> Hi,
>
> If you want to use it as a 10MHz ref for other instruments, you might
> consider building a GPSDO with it.
> Here is one:
> https://www.eevblog.com/forum/projects/lars-diy-gpsdo-with-arduino-and-1ns-resolution-tic/
>
> All the information is in the first post. If you read the complete thread,
> you will get even more information..
>
> BR,
> Askild
>
>
> On Thu, Jun 20, 2019 at 12:00 AM David Slipper <softfoot at hotmail.com> wrote:
>
>> Hi, I am running a UBlox Neo-6M and have configured it with LadyHeather
>> to produce a 10MHz output for use as a better reference for a couple of
>> instruments.
>>
>> Is there any way with LH to determine the accuracy of the 10MHz output
>> in ppm??
>>
>> I am aware that the 10MHz output is jittery on my scope (is that phase
>> noise??) due to the fact that the internal clock is divided by a
>> non-integral value to reach 10 (I believe the internal oscillator is
>> 16MHz).  If I set it to produce 8MHz it is rock solid.
>>
>> I am really interested in the long term accuracy of the 10MHz signal -
>> say over 24 hours.
>>
>> I'm a bit of a newbie at this so any clarification would be welcome.
>>
>> TIA Dave
>>
>>
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