User's Manual Part 5

ROI-S05749 SYSTEM SETUP
3-17
(c) Manual Restart (90 sec.) Control
Upon receiving a command signal for manual restart for test from
the LCT or the PNMT while the optical input signal to the RX 2 is
off, the IDU emits the laser signal from the TX 2 to the RX 1 for 90
±10 sec. This would then cause the laser output of TX1 to turn on.
If, at this time, the fault at point A has been recovered, the ALS
function will be released and the operation will return to normal (if
not it returns to automatic condition).
Fig. 3-1 ALS System Functional Block Diagram
MUX
EQUIPMENT
OPT INTFC
TX1
RX1
A
O/E
RLOS
550 ± 50 ms
TIMER
O/E
RX2
TX2
CONT
LCT or PNMT
DATA BUS
60/180/
300 sec.
DELAY
2±0.25S
TX ON
TIMER
CTRL
ALS CONT
ENABLE/DISABLE
2S
TX ON
TIMER
90±10S
TX ON
TIMER
SB/DATA
BUS
CLEAR