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CXR Larus 80-100-400 Issue 2 July 2006 page
3-32
3.3626 Acquisition
Times:
a. GPS
mode:
1. From power-up after more than 20 minutes off, 5 hours maximum.
2. From power-up after less than 20 minutes off, 2 hours maximum in
Known mode.
b. DS1 or E1 mode:
1. From power-up, after warmup time:
100 seconds (ACQUIRE 1 state).
2. From HOLD state returning to normal tracking:
300 seconds (ACQUIRE 2 state).
3.3627 Settling
Time:
3000 seconds in normal tracking state
3.3628 Output
Signals:
a. 1.544 MHz ovenized crystal oscillator derived clock, tracking input
reference or holding; differential backplane signal drives up to ten output
cards and the 54541 or 54542 Synchronization Monitor Card(s).
b. Clock monitor, framed all ones.
c. Hold indication bus to output cards.
d. Combined software/hardware alarm indication to 54560 Alarm Interface
Card.
e. Hardware alarm indication to 54550 Information Management Card.
f. Serial data link to 54550 Information Management Card for status, control,
personality, and DS1 sync messaging.
g. One-wire interface used by the 54550 to determine whether or not the
54591 is installed.
h. Input A/B select to input card.
i. Sync Status Messaging clock and data (DS1 only) to output cards.
j. Time of Day signal to output cards.
k. Serial Data output to transceivers on both input cards.
l. Serial Clock to transceivers on both input cards.
m. Transceiver Select lines to both input cards.
3.3630 LED
Indicators:
