User's Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
SEPTEMBER 1999
SECTION 2: PRODUCT DESCRIPTION PAGE 2-13
2.3.3 Alarm and Status Indicators
DATA
LOSS
When lit RED, this is an alarm condition indicating that the LYNX.sc radio is not
receiving E1 input data on the corresponding data input channel. This alarm function
can be disabled by rear panel DIP switch setting (see Section 2.4.4). Under data loss
condition, the local transmitter injects AIS (Alarm Indication Signal).
BER This is the Bit Error Rate (BER) alarm. When lit RED, this alarm condition indicates
that the received signal bit error rate is above the error threshold of 1 x 10
-6
. This alarm
condition typically indicates a path problem or a problem with the far-end radio and
usually is not a problem with the near- end radio.
RX SYNC When lit RED, this is an alarm condition indicating that the intended received signal is
not being received. This alarm may indicate problems related to the path,
connections, or the near-end or far-end radio hardware. When the RX SYNC alarm is
active, AIS (Alarm Indication Signal) is injected into the E1 line transmit output data
port.
AIS OUT When lit RED, this is a status condition indicating that the radio receiver is
transmitting AIS (Alarm Indication Signal) on the E1 line transmit output data port, due
to loss of received signal. This typically indicates a path or connection problem or a
near-end or far-end radio hardware problem. This alarm function can be disabled by
rear panel DIP switch setting (see Section 3.12.5).
FAN When lit RED, this is an alarm condition indicating a failure with one or both of the
internal cooling fans. The radio is designed to operate within specification when only
one fan is operating. The two fans are provided for redundancy only.
RADIO
FAIL
When lit RED, this is an alarm condition indicating a major failure with the near-end
radio hardware. It can also indicate improper connections to the CEPT-1 input port.
FAR END When lit RED, this is an alarm condition indicating that there are alarm or status
conditions present on the far-end radio. Press and hold the "Display Far End" button
on the near-end radios to indicate the alarm conditions for the far-end radio terminal.
Monitoring the far-end alarms can be helpful for radio installation and routine
maintenance.