User's Manual

20 4Motion System Manual
Chapter 1 - System Description
1.3.8 Power Feeder
The PIU can support a maximum current of 58 A (@-40.5 VDC). In certain
installations with a relatively high number of ODUs this current may not be
sufficient to power the shelf and all the ODUs. In such installations the ODU
Power Feeder is used as an additional power source providing power (-48 VDC) to
ODUs. It transfers transparently all signals between the AU and the ODU, while
injecting DC power received from an external source. Each ODU Power Feeder
unit can serve up to four ODUs. Up to three ODU Power Feeder units can be
installed in a 1U high Power Feeder panel.
The Power Feeder is not applicable for the configurations supported in the current
release. It will be necessary in the future to support configurations with 6 AUs
where each AU is connected to either six 1x1 ODUs or one 4x2 ODU.
1.3.9 Antenna
In the 4Motion architecture, the antenna is approached as an independent
element. This provides the operator with the flexibility to select the antennas
source according to its supplier policy. To ensure the availability of antennas that
complement the 4Motion solution, Alvarion works closely with several antenna
suppliers to ensure availability of antennas that comply with its requirements.
In cases where the operator prefers other antenna vendors, Alvarion can provide a
recommended antenna specification based on the required antennas types.
Table 1-3: ODU Types
Band (GHz) ODU Frequency Range
(MHz)
ODU Port
Configuration
ODU Bandwidth
(MHz)
ODU Max Tx
Power (dBm)
2.3 2300-2360 1Rx by 1Tx Up to 10 36
2.5 2496-2602 (band A) 1Rx by 1Tx Up to 10 36
2590-2690 (band B) 1Rx by 1Tx Up to 10 36
2496-2602 (band A) 4Rx by 2Tx Up to 20 38
2590-2690 (band B) 4Rx by 2Tx Up to 20 38
3.x 3400-3455 1Rx by 1Tx Up to 14 34
3445-3500 1Rx by 1Tx Up to 14 34
3500-3555 1Rx by 1Tx Up to 14 34
3545-3600 1Rx by 1Tx Up to 14 34
3400-3600 4Rx by 2Tx Up to 20 37
3600-3800 4Rx by 2Tx Up to 20 37