Antenna Alignment; Resetting To The Default Configuration - Cisco Aironet 1400 Series Installation Manual

Antenna Alignment

Antenna Alignment
If your bridges are unable to associate together, you should verify the basic configuration settings on all
bridges before attempting to verify bridge antenna alignment (refer to
First Time" section on page
alignment by using the the RSSI port. The RSSI port can be used even when the bridges are not
associated.
Note To meet regulatory restrictions, the external antenna bridge configuration and the external antenna must
be professional installed.
The RSSI port outputs a DC voltage that is proportional to the received signal level. The RSSI voltage
is available whenever a signal is present, regardless of the bridge mode (installation or normal),
association status, or pre-configuration role setting. The RSSI voltage provides an instantaneous reading
as you move the antenna. The RSSI port is a female BNC connector on the bridge housing. To obtain
RSSI readings, you can use any convenient voltmeter connected to the RSSI port using a cable with a
male BNC connector.
The RSSI voltage increases linearly with signal level as shown in
A larger RSSI voltage reading indicates a stronger signal.
Note
Table 6
Nominal Signal Level (dBm)
-20 or greater
-30
-40
-50
-60
-70
-80
-90 or less
The voltage varies from 0 to 2.7 volts for signals between -90 and -20 dBm, respectively.
For additional alignment information, refer to the Cisco Aironet 1400 Series Bridge Mounting
Instructions that shipped with your bridge.

Resetting to the Default Configuration

If you forget the password that allows you to configure the bridge, you may need to completely reset the
configuration. You can use the MODE button on the power injector or the web-browser interface.
Cisco Aironet 1400 Series Wireless Bridge Hardware Installation Guide
5-8
D R A F T - C I S C O C O N F I D E N T I A L
4-1). If your basic configurations settings are correct, you can verify antenna
RSSI Voltage Levels
RSSI Reading (volts)
2.70
2.31
1.93
1.54
1.16
0.77
0.39
0.00
Chapter 5 Troubleshooting
"Configuring the Bridge for the
Table 6.
OL-4072-01