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The status LED flashes a status pattern to assist in diagnosing installation errors. The
pattern is a sequence of short and long flashes. Trailing short flashes are deleted so
the status pattern can repeat more frequently. Table below details these patterns, it
includes data relating to GPS communications which is not relevant, only flash
positions 2 and 6 should be considered for the purpose of IRIGB diagnostics.
Flash Position Flash Position Meaning of Short (cleared) Flash
Meaning of Long (set) Flash
1
GPS satellite receiver being used for
time reference
Modulated time code input being
used for
time reference
2
Synchronization to better than 5
μ
sec
verified with last 5 seconds
Synchronization to better than
5
μ
sec not
verified within last 5 seconds
3
1PPS Pulse from GPS satellite
receiver is OK
1 PPS pulse from GPS satellite
receiver is bad. In applications with
modulated time code inputs only,
this status bit will
always be set.
4
GPS satellite receiver serial data being
received OK
No serial data being received from
GPS
satellite receiver. In applications
with
modulated time code inputs only,
this status bit will always be set.
5
GPS satellite receiver is tracking
enough satellites for accurate UTC
time.
GPS satellite receiver is not
tracking enough
satellites for accurate UTC time. In
applications with modulated time
code inputs
only, this status bit will always be
set.
6
Time code input being decoded
Time code input not decodable. In
applications without modulated
time code
inputs, this status bit will always be
set.
7
If using 1PPS, set NEXT 1PPS TIME
command sequence has been
performed. Used for Option –M only
Waiting for “SET NEXT 1PPS TIME”
command. Used for Option –M only
Waiting for “SET NEXT 1PPS
TIME” command. Used for Option
– M only
IRIGB Date and Time:-
The IRIGB card extracts months, days, hours, minutes, seconds, milliseconds and
microseconds information from the IRIGB network message it does not however
extract year information, the year information has to be entered manually using the
configuration software date and time sync message. Once the year information has
been set correctly it will remain correct indefinitely so long as the 9000TS is powered.
When the 9000TS is power down the year information will remain correct for six
months, after which the date and time information would have to be manually set once
again.