Verifying Isolation - Tbd - Cisco Aironet 1300 Series Installation Manual

Chapter 4 Stacking Bridges
Install the link 1 bridges (bridges A and C) normally, but leave room at each site to install the link 2
Step 1
bridges (bridges B and C).
Activate the link 1 bridges, align the antennas, and verify proper operation of the link.
Step 2
At each site location, choose a candidate location for the second bridge that is at least
Step 3
away from the first bridge. Separate the bridges as far as is practical from each other, keeping in mind
that the second antenna must have a clear path to the remote system.
At each site location, temporarily install the second link 2 bridge, positioning the antenna toward the
Step 4
intended location of the corresponding link 2 remote antenna.
Note
Verifying Isolation -
Isolation measurements are valid only if the link 1 bridges are operating at maximum power. By default,
the bridge operates at maximum power.
To verify signal isolation, refer to
Ensure that the link 1 bridges are operating at full power and bridge A is configured as the root bridge.
Step 1
At Site 1, measure the isolation between bridges A and B:
Step 2
a.
b.
c.
Go to the remote Site 2 location to measure the isolation between bridges A and D:
Step 3
a.
b.
c.
d.
At Site 2, measure the isolation between bridge C and D by following these steps:
Step 4
a.
OL-5048-01
C I S C O C O N F I D E N T I A L - F i r s t D r a f t
You can improve system isolation by using different polarizations for the two local antennas. For
example, if the link 1 system has vertical polarization, assemble the link 2 system for horizontal
polarization.
TBD
Activate the link 2 bridge (bridge B) as a non-root bridge and let it associate to bridge A (the root
bridge).
Observe the bridge LEDs and verify that the RSSI signal level is
the RSSI signal exceeds –54
Slowly rotate the bridge B antenna a few degrees to the left and to the right and verify that the RSSI
signal level does not spike above
farther away and repeat this step.
Activate the link 2 bridge (bridge D) as a non-root bridge and let bridge D associate to bridge A (the
root bridge).
Observe bridge D's LEDs and align the bridge D antenna with bridge A so that the RSSI signal level is
maximized.
When the antennas are fully aligned, if the RSSI signal level is greater than
are very close. Reduce the output power on all bridges at both sites (bridges A, B, C, and D) to 12
dBm.
If you are still unable to reduce the RSSI signal level to
2 bridges (bridges B and D). For example; change the antenna polarization from vertical to
horizontal.
Turn off bridge A for this measurement.
Figure 4-1 as you follow these steps:
dBm, move the bridge farther away and repeat this procedure.
-54 dBm. If the signal peaks above
-54
Cisco Aironet 1300 Series Bridge Hardware Installation Guide

Verifying Isolation - TBD

TBD
(–54 dBm to - 53 dBm) or less. If
-54 dBm, move the bridge
-54 dBm, the bridge sites
dBm, change the polarization of the link
ft (TBD m)
4-3