User's Manual

Table Of Contents
Module Front Panel LED Indicators and Connectors – continued
FEB 2005 1X SC 4812T Lite BTS Optimization/ATP 6-33
PRELIMINARY
Table 6-35: CSM Card PWR/ALM LED States
LED State Device Status
Solid YELLOW After a reset, the CSMs begin to boot.
Color during the SRAM Test and the Flash
EPROM Code Check Test.
If SRAM or Flash EPROM Tests fail,
the LED changes to Steady RED and
the CSM attempts to reboot.
OFF 1. No DC Power to the card.
2. The on-board fuse is open.
FREQ Monitor Connector
A Test Port provided on the CSM Front Panel via a BNC Receptacle
allows monitoring of the 19.6608 MHz Clock Signal generated by the
CSM. When both CSM 1 and CSM 2 are in an in-service (INS)
condition, the CSM 2 Clock Signal Frequency is the same as that output
by CSM 1.
The Clock Signal is a Sine Wave Signal with a Minimum Amplitude of
+2 dBm (800 mVpp) into a 50 Load connected to this port.
SYNC Monitor Connector
A Test Port provided at the CSM Front Panel via a BNC Receptacle
allows monitoring of the “Even Second Clock” Reference Signal
generated by the CSM Cards.
At this port, the Reference Signal is a Transistor–Transistor Logic (TTL)
Active–High Signal with a Pulse Width of 153 nanoseconds.
MMI Connector
Behind the Front Panel – only accessible when the card is partially
extended from its SCCP Cage Slot. The RS–232 MMI Port Connector is
intended to be used primarily in the development or factory
environment, but may be used in the field for Debug/Maintenance
purposes.
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