TrueTime IRIG NTS-100, Руководство пользователя

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1/20/97
N N T T S S - - 2 2 0 0 1 1 . . M M A A N N 3 3 - - 1 1 3 3 R R e e v v . . A A
3.25.5 When the display shows the desired entry time and date, press "FUNC/ENTR" again,
and the display will show:
Leave dst: 02:00
Last Sun in Oct
or some other entry time and date. Press the right- or left-arrow keys to position the
cursor beneath the character that you wish to change. Press the up- or down-arrow keys
to scroll through the possible choices. Alternatively, directly enter the numbers using the
keypad. The cursor will automatically advance to the next position. The ranges are the
same as before but the exit time must be later than the entry time otherwise DST will
never be entered. When the display shows the desired exit time, press "FUNC/ENTR" to
enter the selections. The data entry may be aborted at any time prior to pressing the last
"FUNC/ENTR" by pressing either the "TIME", "STATUS", or "POSITION" keys.
3.25.6 Once the entry and exit times are entered, they will be retained in nonvolatile memory if
the clock loses power or is turned off. If the nonvolatile memory is corrupted due to
battery failure or any other cause, the entry time will default to 2:00 a.m. on the first
Sunday in April and the exit time will default to 2:00 a.m. on the last Sunday of October.
3.25.7 The sequence of the count upon entry into DST is:
01:59:58
01:59:59
03:00:00
03:00:01
assuming the entry time was 2:00 a.m.. The sequence upon exit from DST is:
01:59:58
01:59:59
01:00:00
01:00:01
assuming the exit time was 2:00 a.m..
3.25.8 If the DST function is enabled or disabled when DST is already in effect, the display will
take several seconds to respond. Each time zone transitions into and out of Daylight
Savings Time independently. This means that if the current time zone just entered DST
and the time zone offset is then changed by means of keypad function 01 to a time zone
in which the local time of the transition has not yet occurred, the standard time for that
zone will be displayed. If the original time zone setting is restored, its time will remain in
DST.
3.26 FUNCTION 67 - LEAP SECOND INFORMATION
3.26.1 Though strictly they may be performed at two other times during the year, in practice
UTC leap second adjustments are only performed on two days of the year: June 30 and
December 31. Use keypad function 67 to retrieve/send information regarding upcoming
leap seconds. To return the leap second status, send the string:
3.26.2 Press "FUNC/ENTR", then "6" "7". The display will show:
Leap second jump
06/30/96 None
(Example)