Section 3: Operation
NetClock/GTP Instruction Manual
Page 3-13
3.3.1 Format
0
Format 0 includes a time sync status character, day of year, time reflecting time
zone offset and DST corrections when enabled. Format 0 also includes the
DST/Standard Time indicator, and the time zone offset value. Format 0 data
structure is shown below:
CR LF I ^ ^ DDD ^ HH:MM:SS ^ DTZ=XX CR LF
where:
CR =
Carriage Return
LF =
Line Feed
I =
Time Sync Status (space, ?, *)
^ =
space separator
DDD =
Day of Year (001 - 366)
HH =
Hours (00-23)
: =
Colon separator
MM =
Minutes (00-59)
SS =
Seconds (00- 60)
D =
Daylight Savings Time indicator (S,I,D,O)
TZ =
Time Zone
XX =
Time Zone offset (00-23)
The leading edge of the first character (CR) marks the on-time point of the data
stream.
The time sync status character I is defined as described below:
(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 Daylight Saving Time indicator D is defined as:
S =
During periods of Standard time for the selected DST schedule.
I = During the 24-hour period preceding the change into DST
D =
During periods of Daylight Saving Time for the selected DST
schedule
O =
During the 24-hour period preceding the change out of DST
