evertz 5600MSC Series, Инструкция по эксплуатации

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Model 5600MSC Master Clock/SPG Manual
TECHNICAL DESCRIPTIONOPERATION
Revision 1.6
Page 3-61
To make DST work, the clocks have to be adjusted one hour ahead when DST begins, and adjusted
back one hour to standard time when DST ends. There are many countries observing DST, and many
who do not.
During the months March/April to September/October, the countries in the Northern Hemisphere are
having their summer and may observe DST, while the countries in the Southern Hemisphere are having
winter. During the rest of the year (September/October to March/April) the countries in the Southern
Hemisphere are having their summer and may observe DST, while the countries in the Northern
Hemisphere are having winter.
Daylight Saving Time is difficult to predict, as many countries change the transition days/principles
every year because of special happenings or conditions that have happened or will happen.
How does the transition to DST start?
Let's say that DST starts at 2:00 am local time and DST is one hour ahead of standard time:
DST start transition
Local time
HH:MM:SS
DST or normal? Comments
01:59:58 normal
01:59:59 normal
03:00:00 DST DST started, time advanced by one hour
03:00:01 DST
03:00:02 DST
Note that local time is never between 2:00:00 - 2:59:59. At the transition from standard time to DST,
this hour is skipped and therefore this day has only 23 hours (instead of 24 hours).
How does the transition from DST end?
Let's say that DST ends at 2:00 am local time and DST is one hour ahead of standard time:
DST end transition
Local time
HH:MM:SS
DST or normal? Comments
00:59:59 DST
01:00:00 DST
01:00:01 DST
...3556 seconds from 01:00:02 to 01:59:57 daylight saving time not shown...
01:59.58 DST
01:59.59 DST
01:00:00 Normal Time is turned back to normal
01:00:01 Normal
...3556 seconds from 01:00:02 to 01:59:57 standard time not shown...
01:59.58 Normal
01:59:59 Normal
02:00:00 Normal
02:00:01 Normal
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