Orolia Spectracom VelaSync 1232, User Manual

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2.8.2 Status LEDs
VelaSync High-Speed Enterprise Time Server includes a TSync Timing card with three
LEDs that provide visual status information. See table
LED Colors below for these indic-
ator codes.
The LEDs operate in certain modes by default.
Table 2-5:
LED colors
LED Color Function Meaning
green
SYNC Unit is synchronized: A valid external time or
1PPS reference is present, disciplining the
onboard oscillator.
yellow
HOLDOVER Unit is in holdover: No valid external reference
is present. The onboard oscillator is not dis-
ciplined by an external reference, but con-
tinues to provide time/frequency for the
duration of the user-set holdover time (default
= 7200 seconds [= 2 hours]).
red
ALARM The unit does not provide a time or frequency
signal.
During the states power-on , self-test , wait-for-host , and download-from-host , modes
are directly allocated to the LEDs, as listed below.
Table 2-6:
LED flash patterns
State
Color/FUNCTION
green
/SYNC
yellow
/HOLDOVER
red
/ALARM
Power-On On Off Off
Self-Test On On On
Waiting for Host Blink Off Blink
Download from Host Strobe Strobe Strobe
Initialize Off Off Off
Never Synchronized Off Off Off
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CHAPTER
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VelaSync 1232 User Manual Rev. 4
2.8 Advanced Timing Connections