Manual
Module Front Panel LED Indicators and Connectors68P09258A31–A
Oct 2003
1X SCt 4812T BTS Optimization/ATP
6-23
FREQ Monitor Connector
A test port provided at the CSM front panel via a BNC receptacle allows
monitoring of the 19.6608 MHz clock 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 is a sine wave signal with a minimum amplitude of +2 dBm
(800 mVpp) into a 50 Ω 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 Tick” reference signal generated by the
CSMs.
At this port, the reference signal is a TTL active high signal with a pulse
width of 153 nanoseconds.
MMI Connector – Only accessible behind front panel. 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.
GLI2 LED Status Combinations
The GLI2 module has indicators, controls and connectors as described
below and shown in Figure 6-2.
The operating states of the 5 LEDs are:
ACTIVE
Solid GREEN – GLI2 is active. This means that the GLI2 has shelf
control and is providing control of the digital interfaces.
Off – GLI2 is not active (i.e., Standby). The mate GLI2 should be
active.
MASTER
S Solid GREEN – GLI2 is Master (sometimes referred to as MGLI2).
S Off – GLI2 is non-master (i.e., Slave).
ALARM
S Solid RED – GLI2 is in a fault condition or in reset.
S While in reset transition, STATUS LED is OFF while GLI2 is
performing ROM boot (about 12 seconds for normal boot).
S While in reset transition, STATUS LED is ON while GLI2 is
performing RAM boot (about 4 seconds for normal boot).
S Off – No Alarm.
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