Appendix A: FAA IRIG Code Description
Page A-4
NetClock/GTP Instruction Manual
Time Since
Loss of Lock
Status/Error
Lock
Indicator
±
1
msec
±
5
msec
±
50
msec
±
500
msec
N/A
Locked
Error< 2us
1
0 0 0 0
< 00:16:40
Unlocked
Error < 1 ms
0
1 0 0 0
00:16:41
to
01:23:39
Unlocked
Error < 5 ms
0
0 1 0 0
01:23:40
to
13:53:19
Unlocked
Error < 50 ms
0
0 0 1 0
13:53:20
to 5 days
18:53:19
Unlocked
Error < 500
ms
0
0 0 0 1
>5 days
18:53:20
Unlocked
Error
Unknown
0
0 0 0 0
N/A
Power
On 0
0 0 0 0
.
TABLE A-1 FAA TIME ERROR INDICATORS