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CXR Larus 80-100-400 Issue 2 July 2006 page
3-43
7
Outside nominal cyclic tracking range of ±7.1 Hz or jitter more than
7 UI peak.
8
Excessive invalid CRC6 codes (for ESF signals only); does not
cause hold.
9
LOS (175 consecutive zeros).
*
Only if tracking DS1/E1 reference inputs. Not used in GPS mode.
3.3723 (continued)
c. Error conditions in invalid output state:
O. Overflow
|
Exit follow mode; unable to phase align.
U. Underflow |
Input frequency is too far off.
3.3724 Card
Power:
-48 volts, 1.2 amp (nominal) when cold, 0.4 amp (nominal) after warmup (10
minutes)
3.3725 Power
Fuse:
2 amps, Type GMT
3.3726 Fuse
Alarm:
Closure to battery
3.38
Model 54541 T1 Synchronization Monitor Card
3.3810 For the front panel of the Model 54541, refer to Figure 3-8.
3.3811 The T1 Synchronization Monitor Card is microprocessor-controlled with local or
remote selection of alarm thresholds, inputs to be monitored, observation
interval, number of consecutive intervals, and manual or automatic mode. The
default mode is an automatic scan with observation interval of 100 seconds per
input. Other intervals are available from 1 to 100,000 seconds in decade
steps. Inactive inputs are not scanned. Access to this information is through
the 54550 Information Management Card.
3.3812 The Model 54500-17 shelf can hold one or two 54541 cards, each capable of
measuring five T1 input signals.