Section 3: Operation
Page 3-18
NetClock/GTP Instruction Manual
3.3.4 Format
3
Format 3 provides a format identifier, time sync status character, year, month,
day, time with time zone and DST corrections, time difference from UTC,
Standard time/DST indicator, leap second indicator and on-time marker. Format
3 data structure is shown below:
FFFFI^YYYY
MMDD
^HHMMSS±
HHMM
D L # CR LF
where:
FFFF = Format Identifier (0003)
I =
Time Sync Status (Space, ? *)
^ = space separator
YYYY =
Year (1999, 2000, 2001 etc.)
MM
= Month Number (01-12)
DD
= Day of the Month (01-31)
HH = Hours (00-23)
MM = Minutes (00-59)
SS = Seconds (00-60)
± = Positive or Negative UTC offset (+,-) Time Difference from UTC
HHMM
=
UTC Time Difference Hours, Minutes (00:00-23:00)
D =
Daylight Saving Time Indicator (S,I,D,O)
L =
Leap Second Indicator (space, L)
# =
On time point
CR = Carriage Return
LF = Line Feed
The time sync status character I is defined as:
(Space) = Whenever the front panel Time Sync lamp is green.
? = When the receiver is unable to track any satellites and the Time
Sync lamp is red.
* = When the receiver time is derived from the battery backed clock
or set manually through the Serial Setup Interface.
The time difference from UTC,
±HHMM
, is selected when the Serial Comm or
Remote port is configured. A time difference of -0500 represents Eastern Time.
UTC is represented by +0000.
The Daylight Saving Time indicator D is defined as:
