Section 3: Operation
NetClock/GTP Instruction Manual
Page 3-15
3.3.2 Format
1
This format provides the fully decoded time data stream. Format 1 converts the
received day of year data (001-366) to a date consisting of day of week, month,
and day of the month. Format 1 also contains a time sync status character, year,
and time reflecting time zone offset and DST correction when enabled. Format 1
data structure is shown below:
CR LF I ^ WWW ^ DDMMMYY ^ HH:MM:SS CR LF
where:
CR =
Carriage Return
LF =
Line Feed
I =
Time Sync Status (space, ?, *)
^ =
space separator
WWW =
Day of Week (SUN, MON, TUE, WED, THU, FRI, SAT)
DD =
Numerical Day of Month (^1-31)
MMM =
Month (JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT,
NOV, DEC)
YY =
Year without century (99, 00, 01 etc.)
HH =
Hours (00-23)
: =
Colon separator
MM =
Minutes (00-59)
SS =
Seconds (00 - 60)
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.
Example
:
* FRI 20APR01 12:45:36
The example data stream provides the following information:
Sync Status:
The clock is not time synchronized to GPS. Time is derived
from the battery backed clock or set manually
Date:
Friday, April 20, 2001
Time: 12:45:36
