? 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 manually through
the Setup Port Interface.
The quality indicator (Q) provides an inaccuracy estimate of the output data
stream. When the receiver is unable to track any GNSS satellites, a timer is star-
ted. "Quality indicators" below lists the quality indicators and the corresponding
error estimates based upon the GNSS receiver 1PPS stability, and the time
elapsed tracking no satellites. The Tracking Zero Satellites timer and the quality
indicator reset when the receiver reacquires a satellite.
Quality
Time
(hours)
TXCO Error (mil-
liseconds)
OCXO Error
(milliseconds)
Rubidium Error
(microseconds)
Space Lock <1 <0.01 <0.3
A <10 <10 <0.72 <1.8
B <100 <100 <7.2 <18
C <500 <500 <36 <90
D >500 >500 >36 >90
Table 5-30: 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.
E x a m p l e :
?A15 271 12:45:36.123 S
The example data stream provides the following information:
SecureSync 2400 User Manual 569
APPENDIX
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