[time-nuts] Precision Time Protocol – Windows 10 implementation

[Adam Kumiszcza]

On Fri, Aug 9, 2019 at 6:04 PM David J Taylor via time-nuts <
time-nuts at lists.febo.com> wrote:

> You already have a PPS signal from your existing GPS, so I was thinking
> simply of distributing that the the Windows PCs, and feeding it to the
> serial port's DCD signal.
>

I will try that. I guess you can connect serial port directly to my
Uputronics expansion card (
https://store.uputronics.com/index.php?route=product/product&path=60_64&product_id=81)
while still attached to Raspberry Pi. Problem is, I'm a software, not a
hardware guy. No idea about soldering. Time to learn a new skill :)

If the PC doesn't have a serial port, check on the motherboard because
> there
> are sometimes serial port headers left unconnected by the PC manufacturer.
>

That's exactly in my case. Motherboard manual says the serial port
expansion is sold separately.

[..] Check with your Android mobile phone
> what the GPS signal levels actually are in your possible locations - I
> think
> Apple don't allow you to access that information.


I don't have access to any Android device :( I'll try to use gpsmon or
other tool to check GPS signal level (S/N ratio of satellites should be
sufficient, I guess?).


> The key here is to have some conducting magnetic material under the
> antenna,
> not just sitting on its own.


My GPS antenna hangs on the window handle and still gives the good result.
It's on the south facing window. Unfortunately, in the new location I will
have access only to west facing window.
Why is it good to have some conducting magnetic material under the antenna?
Is it to reduce multipath?

Best regards,
Adam