1/20/97
N
N
T
T
S
S
-
-
2
2
0
0
1
1
.
.
M
M
A
A
N
N
3
3
-
-
2
2
7
7
R
R
e
e
v
v
.
.
A
A
Response:
OK<CR><LF>
Meaning:
DST will now be entered 04 a.m. on the 2nd Monday in
March and exit DST at 01 p.m. on the 4th Friday in
November.
3.40
FUNCTION 67 - LEAP SECOND INFORMATION
3.40.1
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 serial function 67 to retrieve/send information regarding upcoming
leap seconds. To return the leap second status, send the string:
F67<CR>
3.40.2
The NTS-100 module will return:
F67 06-30-96 +1<CR><LF>
3.40.3
This response indicates a leap second addition during the last minute of June 30, 1996.
If there is no leap second pending, the module will return:
F67 none<CR><LF>
3.40.4
To set the leap second information for the next possible adjustment date, send the
following strings:
F67 06-30-96 +<CR>
To set a leap second addition for June 30, 1996
F67 12-31-98 -1<CR>
To set a leap second subtraction for Dec. 31, 1998
F67 none<CR>
To clear the leap second setting.
3.40.5
If a date for a leap second event is sent other than the next possible adjustment date, i.e.
June 30 if the current date is in the first half of the year or December 31 if the current
date is in the second half of the year, the NTS-100 will return an error message and
ignore the information.