__________________________________________________________
_________________________________________________
CXR Larus 80-100-400 Issue 1, July 2006 page
3-79
3.46
Model 54577 5/10 MHz Output Driver Card
3.4610
For the front panel of the Model 54577, refer to Figure 3-17.
3.4611 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.
3.4612 Output
Signals:
Two 5 MHz and two 10 MHz 1 volt peak to peak ±10% sine wave outputs.
The leftmost output card produces frame synchronization for the rest of the
output cards; plugging in an output card does not cause an error on another
card's output.
3.4613
Output Load Impedance:
50 ohms ±5%, resistive
3.4614 Drive:
Does not apply
3.4615
Number of Outputs:
Four per card, two 5 MHz and two 10 MHz
3.4616 Output
Jitter:
Less than 0.03 UI peak to peak from 10 Hz to 40 kHz
3.4617
Output Connectors (on backplane):
Wirewrap, for up to 22 AWG shielded pair
3.4618 Outputs:
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. If one or more outputs fail to meet the output pulse amplitude level, an
output failure is reported to the 54560. The number of output failures is
monitored by the 54550.
