Alvarion Technologies Ltd. BMAX-BA36 Manuale Utente
Installing the Base Station Equipment
BreezeMAX Modular Base Station System Manual
43
Example:
A full 2.x GHz Base Station operating with DL-UL ratio of 60-40, with regular
PIU(s), 6 AU-IDUs, 24 ODUs (8 ODUs are powered via the AU-IDUs, 16 ODUs are
powered by 4 Power Feeders), a GPS Adapter and an Outdoor GPS Receiver.
PIU(s), 6 AU-IDUs, 24 ODUs (8 ODUs are powered via the AU-IDUs, 16 ODUs are
powered by 4 Power Feeders), a GPS Adapter and an Outdoor GPS Receiver.
Power Consumption of the Base Station, including GPS Adapter and Outdoor GPS
Receiver, excluding the ODUs: 16(PIU) + [65(NPU) + 1.2(GPS Adapter) +6(Outdoor
GPS Receiver) +24(AVU) +6*46(IDU)] / 0.8(PSU Efficiency)=481W.
Receiver, excluding the ODUs: 16(PIU) + [65(NPU) + 1.2(GPS Adapter) +6(Outdoor
GPS Receiver) +24(AVU) +6*46(IDU)] / 0.8(PSU Efficiency)=481W.
Excluding the PIU(s), the total power that should be supplied by PSUs is 465W.
Since each PSU can support a maximum of 200W, we need at least 3 PSUs. A
fourth PSU will support a 3+1 redundancy.
Since each PSU can support a maximum of 200W, we need at least 3 PSUs. A
fourth PSU will support a 3+1 redundancy.
When calculating the power requirements associated with the ODUs, we should
distinguish between the peak power consumption (maximum current) and the
average power consumption (taking into account Tx/Rx ratio) that affect the
requirements from a backup power source.
distinguish between the peak power consumption (maximum current) and the
average power consumption (taking into account Tx/Rx ratio) that affect the
requirements from a backup power source.
For a 2.x GHz system, the peak power consumption of the 24 ODUs, including the
power required for Power Feeders (20 channels), is 24*89 + 16*2 = 2168W. Thus,
the total peak power of the system under worst conditions is 481 + 2168 = 2649W.
power required for Power Feeders (20 channels), is 24*89 + 16*2 = 2168W. Thus,
the total peak power of the system under worst conditions is 481 + 2168 = 2649W.
The average power consumption of the 24 ODUs, assuming DL-UL (Tx/Rx) ratio of
60-40, is 24*(89*0.60 + 15*0.40) + 16*2 = 1459W. Thus, the average power
consumption of the system under worst case conditions is 481 + 1459 = 1940W.
60-40, is 24*(89*0.60 + 15*0.40) + 16*2 = 1459W. Thus, the average power
consumption of the system under worst case conditions is 481 + 1459 = 1940W.
2.2.4
HOT SWAP Support
The NPU, AU-IDU and PIU modules includes a blue HOT SWAP LED and a
micro-switch in the injector/ejector handle to support hot-swap control. After
releasing the ejector's button, the HOT SWAP LED should turn on, indicating that
power to/from the back-panel is disconnected and the module can be removed
safely. For more details refer to
micro-switch in the injector/ejector handle to support hot-swap control. After
releasing the ejector's button, the HOT SWAP LED should turn on, indicating that
power to/from the back-panel is disconnected and the module can be removed
safely. For more details refer to
2.2.5
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 Power Supply Units and external
ODUs, which receive power via the IDUs.
power source and the Base Station Chassis Power Supply Units and external
ODUs, which receive power via the IDUs.
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
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