Olson Technology MUSCLE-EM55X - Manual (Page 26)

OTOT-EM55X/XL Optical Transmitter Rev. x1 www.olsontech.com
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rangement the SBS suppression is specified keeping in mind the SPM problems.
SBS suppressions between 13 and 16.5dBm are recommended for fiber links with lengths of 65km or more. It is rec-
ommended to use the high SBS threshold settings (> 16.5dBm) for distances below 65km, and the lower SBS thresh-
olds for longer distances. The SBS threshold can be selected in 0.5dB steps between 13.0 and 19.0dBm for optimisa-
tion of the SBS performance in individual applications and link characteristics.
LED Display
The OTOT-EM55X/XL has a LED display (3 LED’s for MODUL, INPUT and OUTPUT) and a LCD in combination
with six menu buttons on the front panel for read and set parameters. For normal operation all LED’s should light
green. In case of warnings and alarms the responsible LED’s turn into yellow or red and the LCD shows further ex-
planations.
Module Status
Normal operation MODUL LED green
Non urgent alarms MODUL LED yellow
• fan 1 or fan 2 failure
• Power supply 1 or power supply 2 failure
• Laser cooler current >90 %. In this case the temperature of the trans-
mitter is too high. Improve thermal heat flow in order to decrease the
operating temperature.
• Laser bias current >130%. The laser has degraded.
In case of a fan or power supply failure the power supply/fan unit has to be replaced by
the customer. Olson Technology offers fans as regular spare parts.
Urgent alarms MODUL LED red
• Laser cooler current =100 %. In this case the temperature of the trans-
mitter is too high. Improve thermal heat flow in order to decrease the
operating temperature.
In case of an urgent alarm the transmitter is switched off internally and can only be re-
started with a power on reset by disconnecting the power supply or via the NMS system.
INPUT Status
Normal operation INPUT LED green
Non urgent alarm INPUT LED yellow
• RF input low or high
• In AGC mode, AGC is out of range
• In Manual mode, OMI total RMS is out of range
• Laser bias current >130%. The laser has degraded.
Urgent alarm INPUT LED red
• RF input is missing
OUTPUT Status
Normal operation OUTPUT LED green
Non urgent alarm OUTPUT LED yellow
• The output power drops below +5dBm: The transmitter is still working
but with reduced performance. It must be sent to Olson Technology for
maintenance.
Urgent alarm OUTPUT LED red
• The output power drops below -4dBm: The transmitter is not working.
Send the unit to Olson Technology for maintenance.