User guide

PTP 800 Series User Guide Indoor RF unit (IRFU)
phn-2513_004v000 (Oct 2012)
1-23
1+1 Tx MHSB / Rx SD
This option consists of two transceivers with the branching unit providing two waveguide
interfaces (Figure 14). As well as providing MHSB operation in the event of single point
equipment failure, it also provides Receive Spatial Diversity by providing a second
waveguide interface which connects to a diverse antenna. The IRFU will only radiate from
the main waveguide interface (left hand viewed from the front). Although both transceivers
are capable of transmitting, the transmission from only one of the transceivers is routed to
the main waveguide interface at any one time. This is achieved with an RF switch
incorporated within the IRFU. In the receive direction, the left hand transceiver will
receive from the left hand (or main) waveguide interface and the right hand transceiver
will receive from the right hand (or diverse) waveguide interface.
Figure 14 IRFU 1+1 Tx MHSB / Rx SD configuration