Sagem -LINK F Installation And Operation Manual page 100

SAGEM-LINK F
Installation and Operation Manual
ODU Cable
Transmit Power
Transmit
Frequency
Receive
Frequency
Receive Level
Tributary
Alarms
Trib Alarm
IDU Alarms
Warning 1+1
ID Code
IDU
BER Warning
BER Alarm
Local Aux In
Alarms
Remote Aux In
Alarms
Reproduction and communication prohibited without the written permission of Sagem Communication
power supply, or when the DC input voltage at ODU
input is too low
ODU Cable Alarm is generated by the ODU in case
of an transmit IF input level below the limit
A transmit Power alarm is generated by the ODU in
case of a transmitter AGC loop fault, or in case of a
transmitter mute set by the operator (in 1+1 system
when both transmitters are in mute position).
This alarm is generated in case of IF or RF receive
synthesizer faults. When this alarm is active,
transmitter is also in mute position.
This alarm is generated in case of IF or RF receive
synthesizer faults.
This alarm is generated when receive signal level is
below the receive threshold (default -70 dBm). This
alarm could be generated in case of a faulty remote
transmitter, a propagation problem, a bad antenna
alignment, or a faulty receiver..
Description
a tributary alarm is generated when there is a lack of
input signal for a tributary configured as "normal" (N),
or when there is a input signal for a tributary
configured as "inverted" (I).
Description
A 1+1 warning is generated when main or standby
units (ODU or cable interface module) is not available
(alarm or absent). The system continues to work, but
it is not protected
When local and remote ID Code do not match, there
is an ID Code alarm generated, and there is a AIS
emission on the receive data from the remote
terminal.
This alarm is active in case of an IDU fault, or in case
of problem to recover receive data (same as Mux
LED in front panel).
This warning is generated when BER is greater than
the BER warning threshold (default 10
This alarm is generated when BER is greater than
the BER alarm threshold (default 10
can be generated by a poor receive level, or by an
other problem like a remote modulator fault or a radio
interferer
These four alarms represent local terminal input dry
loop status
These four alarms represent remote terminal input
dry loop status
good, replace the ODU
Check IDU to ODU cable losses. If the
cable is good, replace Cable Interface
module, or the ODU.
Replace the ODU
Replace the ODU
Replace the ODU
Use other
receiver
terminal alarms to make a diagnostic
Corrective action
check the corresponding cable, and
verify that external equipment is properly
connected. (see chapter 3 for more
details).
Corrective action
Replace faulty units (cable interface
module or ODU)
First verify that remote terminal ID code
corresponds to local terminal. If the alarm
is maintained, it means there is an other
link at the same frequency which causes
an interference. It should be necessary to
change transmit frequency or polarization
to avoid such interferences
Verify other parameters like receive
signal level, remote terminal alarms, path
obstructions, radio interferers.
Same as BER alarm
-6
).
Many possible causes : propagation
-3
). A BER alarm problem
presence (make a frequency scan),
Power
transmitter problem, receiver problem,
demodulator problem.
External alarms
External alarms
288055571-04
indications like remote
receive level, and remote
(check RSL), Interferer
supply problem, remote
Page 100/142
Issue 04 : July 2005