Hi Stephan,
I'm not sure if moving the power resolved your issue, but I wanted to
follow up now that we have completed our root cause analysis. The GPSDO
requires a minimum of 5.7V to retain accuracy and the voltage on J509 is
dropping below that during TX and/or RX. The resolution is to first
Thanks for the tip Michael. I'm on travel at the moment, and will try this
next week when I get back to the lab. I'll report my findings to mailing
list.
Cheers
Stephan
On Wed, Nov 14, 2018 at 1:09 AM Michael West wrote:
> Hi Stephan,
>
> Try moving the GPSDO power from the J509 connector to
Hi Stephan,
Try moving the GPSDO power from the J509 connector to the J102 connector on
the N200 motherboard. J102 is 6V AUX power and does not sag when running.
The provided cable is a little short, so you will have to get creative.
Give that a try and let us know if it solves the problem.
Hi Robin,
Thank you for the reply. I have debugged the problem more and realized two
issues.
1) The massive drift of 14 microseconds/second was due me using a 6V, 2A
brick supply. This is my fault! After switching it out for a 3A supply, I'm
able to get the GPSDO to lock (GPS_SERVO message
Hi Stephan. Your issue looks similar to one that has been previously
reported. The Hardware Sustaining Engineering team is currently
investigating.
Would it be possible for you to try powering the GPSDO module from a lab
supply instead of plugging it in to the N210 motherboard and checking if
