NDA-24296 CHAPTER 3
Page 213
Revision 1.0
PH-CK17
Phase Lock Oscillator
4. Lamp Indications
Lamp indications for this circuit card are shown in the table below.
L AMP N AME COLOR STATE
ACT Green Remains lit while this circuit card is in active state.
Off Remains off while this circuit card is in stand-by state.
MJ Red
Lights when the following MJ fault has occurred:
•All of the clock supply routes have failed when the system operates as the clock
subordinate of fice.
•32.768 MHz output clock failure.
•8 KHz output FH failure.
•5 msec × “n” output FH failure.
•Input Frame Pulse (FP ) failure (FP i s s upplied by the SYNC card ).
•Internal OSC (±0.3 ppm deviation) has failed when the system operates as the clock
source office.
MN Red
Lights when the following MN fault has occurred:
•One or more (but not all) DTI/DCS cloc k supply routes failed.
•Dr ifting fa ilu r e.
•Internal OSC (±0.3 ppm deviation) failure.
SYNC
Green Re ma ins lit wh ile the system is sync hronized with the networ k.
OFF
Remains off when either of the following has occurred.
•DCS clock failure when receiving the clock signals from the D CS.
•DTI clock failure when receiving the clock signals from the DTI.
•Dr ifting fa ilu r e.
ICK Green Lights when the internal oscillator is operating normally.
PALM Red Remains lit when power is abnormal.