Spectracom Corporation
Model 9289
NetClock/NTP Network Time Provider Instruction Manual
5-1
5
Serial Data Formats
This section describes each of the Data Format selections available on the RS-232 (Serial
Comm) and RS-485 (Remote Port) outputs. Format selection is made as part of the Serial
Comm and Remote port configuration. Most applications utilize either Data Format 0 or Data
Format 2.
5.1
Format 0
Format 0 includes a time synchronization 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 Saving 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 synchronization status character I is defined as described below:
(Space) =
Whenever the front panel time synchronization lamp is green.
? =
When the receiver is unable to track any satellites and the time synchronization
lamp is red.
* =
When the receiver time is derived from the battery backed clock or set manual
through the Setup Port 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
Example:
271 12:45:36 DTZ=08
The example data stream provides the following information:
Sync Status: Time synchronized to GPS
Summary of Contents for 9289
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