Nera WILINK I System Manual page 20

full duplex data, control and management signals between the AU-IDU and the
AU-ODU, as well as power (48 VDC) and 64 MHz synchronization reference clock
from the AU-IDU to the AU-ODU. The IF Tx and Rx frequencies are 240 MHz and
140 MHz, respectively. IDU-ODU service channel at 14 MHz serves for
bi-directional control, status and management signaling.
1.2.4 AU-ODU
The AU-ODU is a high power, full duplex multi-carrier radio
unit that connects to an external antenna. It is designed to
provide high system gain and interference robustness
utilizing high transmit power and low noise figure. It
supports a bandwidth of up to 14 MHz, enabling future
options such as increased capacity through larger channels
(e.g. 7/14 MHz) or using an IF multiplexer.
1.2.5 Power Interface Unit (PIU)
The single Euro PIU module is the interface between the Base Station site's DC
power source and the Base Station chassis PSUs and external AU-ODUs, which
receive power via the AU-IDUs.
input sources) while avoiding current flow between the two input sources.
1.2.6 Power Supply Unit (PSU)
The single Euro PSU module is a 48 VDC power supply unit. Each
Base Station chassis can contain up to four PSU modules providing
N+1 redundancy configurations.
Table 1-4 displays the number of PSU modules (excluding
redundant units) required for various Base Station configurations
without NPU redundancy (one NPU):
WILINK I MODULAR BASE STATION SYSTEM MANUAL
The PIU filters and stabilizes the Base Station input power and
protects the system from power problems such as over voltage, surge
pulses, reverse polarity connection and short circuits. It also filters
high frequency interference (radiated emissions) and low frequency
interference (conducted emissions) to the external power source.
Each Base Station chassis contains two slots for an optional 1+1 PIU
redundancy. One PIU is sufficient to support a fully populated
chassis. Two PIU modules provide redundant power feeding (two
Base Station Equipment
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