Справочник Пользователя для Andrew Wireless System M17P17P17P
User’s Manual for Remote Unit
ION-M17P/17P/17P
Page 30
M0132AKA_FCC.doc
4.3 OPTICAL-FIBRE-CABLE CONNECTION - RULES
Optical signals are transmitted by use of optical fibres. When connecting these fibres
observe the following instructions.
Optical signals are transmitted by use of optical fibres. When connecting these fibres
observe the following instructions.
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Note:
Care should be taken when connecting and disconnecting fibre-
optic cables. Scratches and dust significantly affect system
performance and may permanently damage the connector. Always
use protective caps on fibre-optic connectors not in use.
optic cables. Scratches and dust significantly affect system
performance and may permanently damage the connector. Always
use protective caps on fibre-optic connectors not in use.
In general, optical fibres do not need special protective measures. However,
protection against environmental influences e.g. rodents and humidity must be
considered.
The optical fibre is a single mode fibre. Type is E9/125 µm with the following
minimum requirements:
Attenuation: <0.36 dB / km @ 1310 nm
/
<0.26 dB / km @ 1550 nm
Dispersion: <3.5 ps / nm km @ 1310 nm
/
<18.0 ps / nm km @ 1550 nm
The specified bending radius of the optical fibres must not be exceeded. The pigtails
for the connection between master unit and remote unit must have a sufficient length.
A protection for the feeding into units must be given. The system attenuation of the
optical fibres, including the connectors, must not exceed 10 dB.
System attenuation and attenuation of optical components must be determined. This
can be achieved by measuring attenuation and reflection with an appropriate
measuring instrument. For pigtails, a total value of < 0.4 dB (measured to a reference
plug) can be assumed due to the dead zone of the reflectometer. These
measurements must be made with a sufficient length of optical fibre, at the input and
output of the device which has to be measured.
Fibre-cable connectors have to be of the same type (E2000APC8°) as the
connectors used for the unit. The fibre-optic cables are connected to the optical
transceiver.
Angled connectors are not compatible with straight optical connectors;
non-compatibility of connectors will result in permanent damage to
both connectors.
non-compatibility of connectors will result in permanent damage to
both connectors.
Before connecting the fibre cables, follow the procedure below to ensure optimized
performance. It is important for these procedures to be carried out with care: