evertz 8010TM, Инструкция по эксплуатации

Страница: 42 / 98

Model 8010TM SDI Time Code Master Manual
Page 3-12
Revision 1.5.1
OPERATION
The leftmost digits of the display will indicate TIME ZONE . The last time zone you entered will be
shown as
+/-HH:MM
where HH represents the whole hour time offset and MM indicates the minutes
offset for time zones where there are partial hours. The +/- sign indicates if the time is ahead or behind
UTC. If you want to re-enter this time zone offset, press
ENTER. To change the whole hour offset
press the

or

keys. To change the partial hour offset press the

or

keys. The 8010TM will
only allow valid time zone offsets to be selected. If daylight saving time is observed in your area, then
you should enter the time zone offset for standard time. You can set up the daylight savings time
adjustment using the procedure outlined in section 3.7.8.
When you have selected the correct time zone offset, press the
ENTER key to complete the data entry
process. The numeric keys return to their normal functions when the data entry has been completed by
pressing the
ENTER key or canceled by pressing the CLEAR key. The display prompt will return to
GUB when data entry mode has been completed.
3.4.8. Daylight Saving Time Support
Daylight Saving Time (DST) or Summer Time as it is called in many countries, is a way of getting more
out of the summer days by advancing the clocks by one hour during the summer. Then, the sun will
appear to rise one hour later in the morning when people are usually asleep anyway, at the benefit of
one hour longer evenings when awake: The sunset and sunrise are one hour later than during normal
time.
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:
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 anything 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).