30 MN.00356.E - 003
6 TECHNICAL SPECIFICATION
In the further page all the technical specification of ALFOplus2.
In Section 8.
DESCRIPTIONS AND SPECIFICATION more details regarding the available ALFOplus2 version
depending on RF frequency.
6.1 ADAPTIVE MODULATION
ALFOplus2 implements an adaptive modulation algorithm to improve the system gain when the quality of
the received signal become insufficient to guarantee an error free link.
Adaptive modulation guarantees error free and hitless unidirectional downshifts with fading speed up to 30
dB/s. Ethernet frames aren’t lost in case of upshift and downshift events.
The ACM shifting thresholds are shown in Tab.20
, Tab.21, Tab.22 and Tab.23.
6.2 LINE INTERFACE CHARACTERISTICS
The line interfaces (LAN1 and LAN2 GE with PoE facilities, LAN3 and LAN4 optical up to 2.5Gbps) are con-
nected to an embedded Ethernet switch. Ethernet traffic is forwarded to the radio interface through 2x 2.5
Gbps port, one for radio branch (BB, IF and RF unit). Network synchronism can be acquired and provided
by each Ethernet switch port.
See Fig.14
for ALFOplus2 block diagrams.
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