Symmetricom TimeHub 5500 System Manual

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097-55501-01 Issue 6 – June 2003 161
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5
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Maintenance
INPUTS
Q
Off The associated reference
input is not qualified (Q) for
tracking.
If the INPUTS E lamp is off or if
the Warmup lamp is lit, none
required.
If the Freerun lamp is lit longer
than 1 min, troubleshoot the
input signal source.
If the INPUTS Q lamp is lit on
the other clock card over 200 s:
1. Remove, then insert this card
(refer to Procedure 5-1).
2. Replace this card using
Procedure 5-1.
Green The associated reference
input is qualified (Q) for
tracking.
None required.
INPUTS
A
Off The associated reference
input is not being actively (A)
used for tracking.
None required.
Green The associated reference
input is being actively (A) used
for tracking.
In a remote system , this light
indicates the shelf being
configured as a remote shelf.
In this case, the corresponding
‘Q’ and ‘E’ lights are off.
None required.
Table 5-1. Clock Card Front Panel Items (Cont’d)
Name State Description
Action

Symmetricom TimeHub 5500 Specifications

General

Brand	Symmetricom
Model	TimeHub 5500
Category	Data Loggers
Language	English