User Manual

129
MN024-08
TFLN power supply
Each TFLN master optical TRX is supplied by the sub-rack back-plane (12V).
The power consumption of each TFLN master optical TRX is 12W.
Warnings (to be read before the TFLN installation)
Dealing with optical output ports
• The TFLN master optical TRX contains semiconductor lasers. Invisible laser
beams may be emitted from the optical output ports. Do not look towards
the optical ports while equipment is switched on.
Handling optical connections
• When inserting an optical connector, take care to handle it so smoothly
that the optical fibre is not damaged. Optical fibres have to be single-mode
(SM) 9.5/125µm.
• Typically, Britecell Plus equipment is provided with SC-APC optical
connectors. Inserting any other connector will result in severe damages.
• Do not force or stretch the fibre pigtail with radius of curvature less than 5
cm. See fig. 19 for optimal fibre cabling.
• Remove adapter caps only just before making connections. Do not leave
SC-APC adapters open, as they attract dust. Unused SC-APC adapters must
always be covered with their caps.
• Do not touch the adapter tip. Clean it with a proper tissue before inserting
each connector into the sleeve. In case adapter tips need to be better
cleaned, use pure ethyl alcohol
Inserting or removing TFLN modules
• Do not remove or insert any TFLN module into TPRN sub-rack before
having switched off main power supply.
• The TFLN modules must be handled with care, in order to avoid damage to
electrostatic sensitive devices.
• When installing TFLN modules in the sub-rack, take care to alternate active
and passive cards in order to ensure proper heat dissipation.
TFLN
WRONG
OPTIMAL
Fig. 5.11: Fibre Optic bending