Lanex TM-77, Руководство по эксплуатации

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4
X
E1/G.703 P
LESIOCHRONOUS
M
ULTIPLEXER
O
PERATING
M
ANUAL
IOA77-1F 19 May 2007
Optical fiber connectors - particularly single-mode ones - are very precise components. That
is why they should be handled with care, with no excessive forces when connecting
and disconnecting them. Also the socket and the plug "ferrule" should be kept ideally clean.
If dirty, the socket can be blown with clean compressed air, while the ferrule can be cleaned with
isopropyl or ethyl alcohol (denatured alcohol must not be used). A piece of cloth, which does not
leave fibers, should be used for this purpose.
The diameter of the single-mode optical fiber core is only 9
µ
m. Thus any contamination
particles of similar size may cause significant signal attenuation and completely disable
transmission.
If no optical fiber plugs are connected to the device, the sockets should be always secured
with protective caps to avoid dust penetration.
The following steps should be performed to make a connection:
•
remove the protective caps from the socket and the plug ferrule;
•
put the ferrule into the socket end caring of accurate alignment of the socket and plug axes
- any attempts of pushing the plug "obliquely" can damage the connector. Pay attention to place
the key located on the plug circumference (outside the ferrule) in the notch in the socket;
•
tighten the connector nut until slight resistance is felt.
Please remember that the fiber optic line connected from one side to the optical transmitter -
should be connected to the receiver from the other side. This fact will be indicated by the red
diode "LOOS", which will go out. A reverse connection is not harmful but of course the devices
will not function ("LOOS" diodes in both multiplexers will be on and AIS signal will be sent to
E1/G.703 interfaces).
Any manipulations of fiber optic connectors may be performed when the power supply is on.
The optical transmitter may be connected to the receiver of the same multiplexer with a short
section of an optical cable in order to close the "local loop" and take measurements.
NOTE !
Radiation transmitted by the laser transmitter is harmful to eyes! It is indicated
by the following symbol placed on the device:
Never look at the uncovered socket without a plugged-in fiber optic connector. The transmitter
emits full power always when the device is on - with or without a signal connected
to the electrical input.