14-10-2019, 06:22 PM
I have been doing some checks on the 'sync-ing' ability of my GPS2Time software (V1.0.0.18) during the course of the day today (for over 9 hours) using NTPMonitor web-based software to log the variations, and a cheap-ex USB GPS dongle.
The typical timing error is between 105 and 120mS of UTC, well within the 1-second accuracy required for most digital modes like FT8 or contest logging... Not as good as straight 'time utilities' that use the internet to sync, but good for portable operation where there is no WWW access.
I did a couple of screen prints to illustrate the overall stability. I suspect that a few of the 'glitch' points occurred while I was using the PC for very intense CPU processes and might have delayed the measurement process.
The timing versus three stratum 1 to 4 sources.
The GPS2Time software display on screen.
The typical timing error is between 105 and 120mS of UTC, well within the 1-second accuracy required for most digital modes like FT8 or contest logging... Not as good as straight 'time utilities' that use the internet to sync, but good for portable operation where there is no WWW access.
I did a couple of screen prints to illustrate the overall stability. I suspect that a few of the 'glitch' points occurred while I was using the PC for very intense CPU processes and might have delayed the measurement process.
The timing versus three stratum 1 to 4 sources.
The GPS2Time software display on screen.
Doug VK4ADC @ QG62LG51
http://www.vk4adc.com
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http://www.vk4adc.com
This Forum is only going to be as interesting as the posts it contains.
If you have a comment or question, post it as it may trigger or answer the query in someone else's mind.