User Manual

AirLink Pro T1/E1 Rack Mount Installer’s Guide
Configuration
Rev. B - 1/97
3-13
Figure 3-2
Hub Application Different paths
Hub Application (Same Path) (Application 7)
This example involves the use of antenna pairs configured to take advantage of
fixed horizontal and vertical wave polarization. Wave polarization is
achieved by mounting the antenna pair so that the feedhorns of both antennas
are aligned either vertically or horizontally (per manufacturer’s instructions).
By using antenna polarization, you can locate two AirLink Pro T1/E1 Rack
Mount pairs at the same sites and use the same wave path without conflict (see
Figure 3-3). In this application, the primary master provides burst sync to the
secondary master and the two units are connected to a AirLink Pro T1/E1 Rack
Mount protection switch (Application 7).
When the Primary master fails, the link does not break because the secondary
master transfers to its own internal burst sync.