When you move the antenna during alignment, the radio signal from the remote antenna can be seen to have a strong central main lobe and smaller side lobes. The object of the alignment process is to set the antenna so that it is receiving the strongest signal from the central main lobe.

Vertical Scan

Remote

Antenna

Horizontal Scan

Main Lobe

 

Maximum

RSSI Voltage

RSSI

 

 

Voltage

 

Side Lobe

 

 

 

 

Maximum

 

 

 

Maximum Signal

Strength Position for

Vertical Alignment

Maximum Signal Strength Position

for Horizontal Alignment

To align the antennas in the link, monitor the signal strength LEDs or the RSSI value in the management interface. Start with one antenna fixed and then perform the following procedure on the other antenna:

NOTE: The RSSI output can be configured through management interfaces to output a value for specific WDS ports. See page 6-40 for more information.

High 11a

Signal

11b/g

Power

 

 

 

 

11a

Link

Medium 11a

Signal

11b/g

Power

 

 

 

 

11a

Link

Low 11a

Signal

11b/g

Power

 

 

 

 

11a

Link

3-11

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Image 37
3Com WL-575, 3CRWEASYA73 manual High 11a Signal