Sagem SAGEM-LINK F - 1+1 Frequency Diversity

SAGEM-LINK F 288055571-04
Installation and Operation Manual
Page 114/142
Issue 04 : July 2005
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IDU
ODU
Main
Standby
ODU
ODU
Main
Standby
ODU
Cable
Interface
Module
(Main)
IDU
Cable
Interface
Module
Standby
Cable
Interface
Module
(Main)
Cable
Interface
Module
Standby
Figure 5.7 SAGEM-LINK F 1+1 SD Configuration
The 1+1 Space Diversity is a 1+1 Mute hot standby system, without coupler and with a second
antenna.
One couple of frequencies is involved, one of the two transmitter is in mute position.
This system is mainly used in case of propagation problem (long hop multiple paths). The switching
criteria is the same compared to MHSB protection system. However, an optional criteria is available
for diversity configurations : receive signal level.(see Chapter 3, section 3.3.7.3).
5.7.3 – 1+1 Frequency Diversity
IDU
ODU
1
2
ODU
ODU
1
2
ODU
Cable
Interface
Module
1
IDU
Cable
Interface
Module
2
Cable
Interface
Module
1
Cable
Interface
Module
2
F1 / F'1
F2 / F'2
Figure 5.8 SAGEM-LINK F 1+1 FD Configuration (2 antennas per terminal)
OR
IDU
ODU
1
2
ODU
ODU
1
2
ODU
Cable
Interface
Module
1
IDU
Cable
Interface
Module
2
Cable
Interface
Module
1
Cable
Interface
Module
2
Fa / F'a
Fb / F'b
H
V
H
V
Figure 5.9 SAGEM-LINK F 1+1 FD Configuration (1 dual polarized antenna)
In frequency diversity systems, two couples of frequency are used. There is no switching at the
transmit side, both transmitters are operating. There is only a protection switch for the receivers.