User Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
OCTOBER 1998
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.