Dual Polarizationr; Power Split Radiom; Adio Mount (Dprm); Ount (Psrm) - DragonWave Horizon COMPACT Plus Product Manual

3.3 Dual Polarization Radio Mount (DPRM)
The DPRM system allows two Horizon Compact Plus units to be assembled to a single antenna. The
antenna used is no different to that used for a single unit. One Horizon Compact Plus unit is mounted for
horizontal polarization and the other for vertical polarization. Both units can transmit and receive
simultaneously. This allows a link to carry up to 800 Mbps of Ethernet traffic. Although both units can
operate on the same frequency channels, with 30 dB isolation, it is recommended that different frequency
channels be used for each unit.
Figure 3-5 Dual Polarization Radio Mount
3.4 Power Split Radio Mount (PSRM)
For redundancy purposes, the PSRM allows two Horizon units to be mounted to a single antenna. Both
units must be oriented for the same polarization and only one unit can transmit/receive at any one time.
The PSRM looks similar to the DPRM shown in Figure 3-5, but has internal components that only allow
one unit to transmit/receive at a time.
Note that redundant systems do not have to use the PSRM. Each may be separately mounted to their
own antennas if desired.
The benefits of the PSRM are that only one antenna is required, reducing tower real estate requirements,
reducing weight and minimizing wind loading.
Disadvantages include a 4 dB loss in signal when operating on the primary systems at each end of the
link and an 8.5 dB loss in signal when a secondary radio is activated (one end running on Primary and
other end operating on secondary).
Horizon Compact Plus Release 1.0.1
Note that redundancy is not supported in this release.
Physical Description
Wireless Ethernet Product User Manual – Volume 1
11