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| author | Eric S. Raymond <esr@thyrsus.com> | 2015-03-13 07:34:21 -0400 |
|---|---|---|
| committer | Eric S. Raymond <esr@thyrsus.com> | 2015-03-13 07:34:21 -0400 |
| commit | f0a7a853d5eac933f60b562f3b44102296c9e23f (patch) | |
| tree | 217a391fbcc2b67401dbb71834a71192d5f1f307 /www | |
| parent | bdeff9288fb2dd281a488052222b857a23546e8f (diff) | |
| download | gpsd-f0a7a853d5eac933f60b562f3b44102296c9e23f.tar.gz | |
Minor revisions to GPSD Time Service HOWTO.
Diffstat (limited to 'www')
| -rw-r--r-- | www/gpsd-time-service-howto.txt | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/www/gpsd-time-service-howto.txt b/www/gpsd-time-service-howto.txt index cd3d7494..0739a520 100644 --- a/www/gpsd-time-service-howto.txt +++ b/www/gpsd-time-service-howto.txt @@ -49,15 +49,15 @@ into more detail about the steps. 8. (Optional and challenging.) Hand-tune your installation for the best possible performance. -This document is intended to be a comprehensive guide suitable for -people who know little about time service. We encourage others to -contribute additions and corrections. +This document does not attempt to explain all the intricacies of time +service; it is focused on practical advice for one specific deployment +case. There is an introduction <<TIME-INTRO>> to basic concepts and +terminology for those new to time service. An overview of the NTP +protocols can be found at <<WIKI-NTP>>, and the official NTP FAQ +<<NTP-FAQ>> is probably as gentle an introduction to the NTP reference +implementation as presently exists. -This document does not attempt to explain all the intricacies of -time service; it is focused on practical advice for one specific -deployment case. An overview of the protocols can be found at -<<WIKI-NTP>>, and the official NTP FAQ <<NTP-FAQ>> is probably -as gentle an introduction as presently exists. +We encourage others to contribute additions and corrections. .Units table |==================================================== @@ -82,8 +82,8 @@ the oscillators in your equipment. == NTP with GPSD == See <<TIME-INTRO>> for a technical description of how NTP corrects -your computer's clock. For purposes of this how-to, the important -concepts to take way are those of time strata, servers, and +your computer's clock against wobble. For purposes of this how-to, the +important concepts to take way are those of time strata, servers, and reference clocks. Ordinary NTP client computers are normally configured to get time from @@ -249,7 +249,7 @@ CONFIG_PPS=y CONFIG_PPS_CLIENT_LDISC=y ----------------------------------------------------------------------------- -Some embedded systems, like the Rasberry Pi, detect PPS on a GPIO +Some embedded systems, like the Raspberry Pi, detect PPS on a GPIO line instead of an a serial port line. For those systems you will also need these two lines: |