From e79c5f65766d71ddd9d8f67f4c9950a3d9ea6280 Mon Sep 17 00:00:00 2001 From: Joe Taylor Date: Sun, 20 Sep 2020 10:16:08 -0400 Subject: [PATCH] Minor edits to User Guide. --- doc/user_guide/en/install-windows.adoc | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/doc/user_guide/en/install-windows.adoc b/doc/user_guide/en/install-windows.adoc index b999c15e7..19c73e3a3 100644 --- a/doc/user_guide/en/install-windows.adoc +++ b/doc/user_guide/en/install-windows.adoc @@ -21,19 +21,21 @@ TIP: Your computer may be configured so that this directory is `"%LocalAppData%\WSJT-X\"`. * The built-in Windows facility for time synchronization is usually - not adequate. We recommend the program _Meinberg NTP Client_ (see - {ntpsetup} for downloading and installation instructions). Recent + not adequate. We recommend the program _Meinberg NTP Client_: see + {ntpsetup} for downloading and installation instructions. Recent versions of Windows 10 are now shipped with a more capable Internet time synchronization service that is suitable if configured appropriately. We do not recommend SNTP time setting tools or others that make periodic correction steps, _WSJT-X_ requires that the PC - clock be monotonic. + clock be monotonically increasing and smoothly continuous. NOTE: Having a PC clock that appears to be synchronized to UTC is not - sufficient, monotonicity means that the clock must not be - stepped backwards or forwards during corrections, instead the - clock frequency must be adjusted to correct synchronization - errors gradually. + sufficient. "`Monotonically increasing`" means that the clock + must not be stepped backwards. "`Smoothly continuous`" means + that time must increase at a nearly constant rate, without + steps. Any necessary clock corrections must be applied by + adjusting the rate of increase, thereby correcting + synchronization errors gradually. [[OPENSSL]]