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CXR Larus 80-100-400 Issue 2 July 2006 page
3-27
3.3544 Fuse
Alarm:
Closure to battery
3.36
Model 54591 GPS Stratum 1/PRC Track and Stratum 3E/LNC
Hold Clock Card
3.3610 For an illustration of the Model 54591, refer to Figure 3-6.
3.3611 This card provides Stratum 1/PRC performance when in GPS mode and backup
Stratum 3E/LNC performance in the event of a GPS failure.
3.3612 Provisioning:
Model 54591-2 supports the AB input architecture.
The AA input architecture is not supported.
NOTE:
A description of the AB architecture is provided in Appendix A.
3.3613 Input
Signals:
Stratum 1/PRC Primary Reference Source (PRS) is an integral GPS receiver, per
Bellcore GR-2830-CORE and ITU-T G.811.
a. DS1
Inputs
Recovered clock from 54511 input cards, nominal 1.544 MHz, tracks within ±7.1
Hz.
b. E1
Inputs
Recovered clock from 54512-4 input cards, nominal 2.048 MHz, tracks within
±9.4 Hz.
c. 2048 kHz Inputs
Recovered clock from 54512-3 input cards, nominal 2.048 MHz, tracks within
±9.4 Hz.
d. Composite Clock Inputs
Recovered clock from 54513-3 input cards, nominal 64 kHz, tracks within ±0.3
Hz.
e. 5 MHz Inputs
Recovered clock from 54513-4 input cards, nominal 5 MHz, tracks within ± 23
Hz.
f. 10 MHz Inputs