I presume you mean +/- 1 ms. Your phrasing was a
touch ambiguous. And that is only with the multimedia tick size
setting to 1ms. (By now setting to 0.1 ms should be allowed but I
suppose ms does not figure that's productive.
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On 20220510 22:21:51, Simon Brown
can tell you that with Windows & NTP setting the time
results in either 0 or 1 ms offset, it’s good. An advanced
NTP client talks with several NTP servers, determines round
trip latency, performs long term analysis and generally
results in a 0 ms offset.
Windows time sync runs as a service using the local system
account, there will be a small amount of latency with this
You can do that using the PC version of
Symmetricom's ntp client. If not that there is a full up ntp
server/client for NTP out there on the web. One or both of
those options should include the standard com port. The
accuracy may not be all that great, though. There is a lot of
latency variation with Windows. And Windows time setting
granularity is 1 ms when a program has the multi-media timers
active and set to 1 ms.
On 20220510 10:25:09, EA7HGL wrote:
[Edited Message Follows]
Hi Simon. I have
seen in the forecast of version 1.2.7 of the "World Map",
an NTP client, would it be possible to implement the
reading of the clock of a GPS (installed in a serial
port)? It would be appreciated in areas or circumstances
without internet connection .
Thanks for your time. Antonio D. (EA7HGL)
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