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CXR Larus 80-100-400 Issue 2 July 2006 page
3-16
b. E1
Inputs
CAS or CCS and CRC4 ON or OFF for each input automatically selected
or set from 54550 through the serial port.
c. 2048 kHz Inputs
Does not apply.
d. CC/5 MHz/10MHz/RS-422 Inputs
Does not apply.
3.3432 Line
Code:
Does not apply
3.3433 Input
Impedance:
Does not apply
3.3434 Input
Sensitivity:
0.3 to 1.5 volts RMS
3.3435 Jitter
Tolerance:
Does not apply
3.3436 Input Signal Selection:
Track and Hold Card A lights the Input A LED when it is tracking Input A and
the Input B LED when it is tracking Input B. In the AA architecture, Track and
Hold Card B does the same. In the AB architecture, Track and Hold Card B
lights the Input A LED when it is tracking Input B and the Input B LED when it
is tracking Input A. Selection of the other input can be done by a track and
hold card when it detects a problem with the input or by command from the
54550 Information Management Card.
3.3437 External
Reference/Input:
5 MHz or 10 MHz at 0.3 to 1.5 volts root mean square (RMS) into an
impedance of 50 ohms
This feature is not available for reference replacement on the track and hold
cards but can be used as tertiary input (i.e., able to be tracked).
3.3438 Oscillator:
Ovenized crystal oscillator exceeds Stratum 3E/LNC specifications.
Minimum accuracy of ±1.0 x 10
-6
.
3.3439 Accuracy (20 years):
1.544 MHz ±4.6 x 10
-7
2.048 MHz ±4.6 x 10
-7
3.3440 Pull-in
Range:
1.544 MHz ±4.6 x 10
-6
(±7.1 Hz)
2.048 MHz ±4.6 x 10
-6
(±9.4 Hz)
Will not track any phase transient greater than 8 UI.
3.3441 Holdover
Drift: