132
Install the Stratum 3 clock
October 2002
NOTE:
Only SW 1 and SW2 are used. SW1 controls the output of alarm signals from the Stratum
3 Clock circuit pack.
2 CC Select OFF = enable
ON = disable (default)
3 Framing Select OFF = ESF
ON = D4 (default)
4 BX.25 OFF = enable
ON = disable (default)
ST3 Clock Circuit Pack Option Switch Settings
Switch Status/Results
SW1
Minor
Alarm
Control
OFF = minor alarm never output
ON = minor alarm is output if holdover occurs
SW2
Major
Alarm
Control
OFF = major alarm is output and fail lamp lights if 5 VDC
power is lost and 4 kHz output is lost
ON = major alarm is output and fail lamp lights if 5 VDC
power is lost and 4 kHz output is lost and holdover occurs
Composite Clock Timing Output (TOCA) Circuit Pack
Switch Range
500 1000
1 ft.
(0.3 m)
500 ft.
(152 m)
1000 ft.
(305 m)
1500 ft.
(457 m)
2000 ft.
(610 m)
2500 ft.
(762 m)
3000 ft.
(914 m)
OFF OFF <-----------------------------------------------
--->
ON OFF <------------------------------------------------
---->
OFF ON <-------------------------------------------------
--->
ON ON <-------------------------------------------------
-->
CI Option Switch Settings
Switch Function Position