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3CC08991ATAA TQ BJA 01
Issue 01 -- March 2004
Figure 1 - Alcatel 9400 UX 1+0 configuration
Main IDU and Equipment Craft Terminal
1+0 9400 UX Outdoor Unit on its pole mounting, with
30 cm integrated antenna
New generation unit 9400UX flat ODU
2.1.2.2 -- Protected configuration
Two types of problem can impact the availability of a radio link: equipment failures and propagation problems.
1+1 protected configurations are used to increase the availability of the link compared to 1+0 unprotected
configuration, by adding redundant functions to the equipment on the Outdoor and Indoor parts:
--
to secure the link in case of temporary (transient alarm) or definitive (equipment failure) malfunction,
--
to improve the performances of the equipment towards propagation problem (in some outdoor units
configurations only).
The (1+1) configurations include an automatic errorless Rx switching.
If the link is protected, then wayside traffic and auxiliary channels are automatically protected.
Various protected configurations are available with the following applications:
ODU CONFIGURATION
APPLICATIONS
9400 UX
1+0
1x ODU
1x antenna single
polarization
Non--protected
1+1 HSB
2x ODU at same
frequency
1x coupler
1x antenna single
polarization
Protection against failures
1+1 HSB SD
2x ODU at same
frequency
2x antennas single
polarization
Protection against failures
Improvement of
performances versus
multipath propagation
1+1 FD
2x ODU at different
frequencies
2x antennas single
polarization (or 1 antenna
dual polarization)
Protection against failures
Improvement of
performances versus
multipath propagation
SD : Space Diversity, FD: frequency diversity
Содержание 9400 UX
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