Section 3: Operation
NetClock/GTP Instruction Manual
Page 3-17
Inaccuracy
Code
Time Error
(mSec)
Time Since
Unlock (Hours)
Space
<1
Locked
A
<10
<10
B
<100
<100
C
<500
<500
D
>500
>500
TABLE 3-4 QUALITY INDICATORS
The leap second indicator L is defined as:
(Space) = When a leap second correction is not scheduled for the end of the
month.
L = When a leap second correction is scheduled for the end of the
month.
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
:
?A01 271 12:45:36.123 S
The example data stream provides the following information:
Sync Status: The clock has lost GPS time sync. The inaccuracy code of “A”
indicates the expected time error is <10 milliseconds.
Date:
Day 271 of year 2001.
Time:
12:45:36 UTC time, Standard time is in effect.
