Re: [time-nuts] (newbie alert) hints on tweaking IEEE1588 on embedded systems

2019-09-23 Thread Philip Gladstone
I also have an STM32 port of the ptpd code that seems to work reasonably well -- it runs on an STM32F407 board. I'll hack up some code to see what the actual error is -- the ptp master is another board deriving time from GPS and I could add another gps to the second board to use as a source of trut

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-23 Thread Michael Wouters
I have uploaded the paper that appears in the conference proceedings: http://www.openttp.org/downloads/Multi-GNSS_IFCS-EFTF_2019_paper.pdf Cheers Michael On Sun, Sep 22, 2019 at 9:49 AM Michael Wouters wrote: > > Hello Anders, > > We did some work on single-frequency time-transfer with the F9P e

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-23 Thread Michael Wouters
Hello Ragnar Mktimetx uses the receiver-provided sawtooth correction in the TP message. The TDEV plots in the presentation I linked show its effectiveness. Cheers Michael On Mon, 23 Sep 2019 at 4:21 pm, Ragnar Sundblad wrote: > > Hello Michael, > > > On 22 Sep 2019, at 23:54, Michael Wouters

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-23 Thread Anders Wallin
> Anders, > Thanks for sharing your results! I am a but surprised that you have so > large > variations, I wonder how much the antenna placement affects the results. > Just for fun - can you tell us more about how your antenna is place now? > Current antenna placement was restricted by the 5m cabl