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Configuring the fibre optical modem
Chapter 8
Configuring the digital
communication modules
1
Configuring the fibre optical modem
Two different levels of optical output power can be set on the HMI under:
Configuration/TerminalCom/RemTermCom/OptoPower
For the optical module, the optical output power has to be set according to the attenua-
tion of the fibre optic link.
For multimode fibres:
•
If the attenuation is less than 6 dB, use Low setting
•
If the attenuation is higher than 10 dB, use High setting
•
If the attenuation is between 6 and 10 dB, use either High or Low setting
For single-mode fibres:
•
If the attenuation is higher than 5 dB, use High setting
•
If the attenuation is between 0 and 5 dB, use either High or Low setting
To achieve the best operation, the optical communication modules at both terminals
must be synchronised. To fulfil this, one terminal acts as a Master and the other as a
Slave. This is set under:
Configuration/TerminalCom/RemTermCom/CommSync
This setting should not be mixed up with the Master-Slave setting for the differential
function.
When communicating with FOX20 or FOX6Plus, the setting should be Slave.
When operating over dedicated fibres the setting shall be Master at one terminal and
Slave at the other.
