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CXR Larus 80-100-400 Issue 2 July 2006 page
3-63
3.4221
Outputs and Controls:
a. Alarm line to 54560 Alarm Interface Card signals loss of one or more
outputs.
b. One-wire interface to 54550 Information Management Card reports
personality and LED and output status and can disable the capacity of
any specific output to generate an alarm.
c. Switch selects SF or ESF framing. See Figure 3-11.
d. If one or more outputs fail to meet the output pulse amplitude level, an
output failure is reported to the 54560. This failure can be caused by
external wiring capacitance or faulty termination. The number of output
failures is monitored by the 54550.
e. There is a small jumper behind the faceplate that selects Protected or
Non-Protected operation with a matching output card.
3.4222 LED
Indicators:
Front Panel Label
LED Color
Indication
FAIL Red
Card
fail
CLK A
Green
Clock A selected
CLK B
Green
Clock B selected
I/P A
Yellow
Input A selected
I/P B
Yellow
Input B selected
OVERRIDE
Yellow
Override (manual selection)
OUTPUT LOSS
Red
Output loss
3.4223 Card
Power:
-48 volts, 120 mA (nominal)
3.4224
Power Fuse:
2 amps, Type GMT
3.4225 Fuse
Alarm:
Closure to battery
3.43
Model 54572 Composite Clock Output Driver Card
3.4310
For the front panel of the Model 54572, refer to Figure 3-13.
3.4311 Input
Signal:
Differential 1.544 MHz TTL clock signal from one of the two track and hold
cards or, if both of these have failed, from one of the two input reference
signals. The card provides for automatic selection of these input references.
Automatic selection can be overridden by manual remote selection.
3.4312 Output
Signals:
