Behaviour During Installation - Motorola PTP 300 Series User Manual

In each of the states detailed above, the unit should be aligned to give the highest pitch tone.
It should be noted that if, when in the Synchronized or Registered state, the tone varies
wildly, you may be suffering from interference or a fast fading link. Installing in this situation
may not give a reliable link. The cause of the problem should be investigated.
For the ease of alignment, both Master and Slave units use the install tones in the same way
but with some small behavioral differences. This allows the installer to install the Slave unit
first and carry out the initial alignment with the Master unit if desired. However, due to the
behavioral differences of Master and Slave units, it is recommended that the Master unit is
installed first and the initial alignment carried out at the Slave unit.
Once the optimum performance has been achieved by directing the Slave unit (indicated by
highest frequency of tone) then adjustment of the direction of the Master unit should be done
without moving the Slave. Repeat if necessary at the Slave and then the Master until optimum
alignment has been obtained.
There is a graphical installation screen (section 7.7.7 "Graphical Install") available using the
web interface that displays the state of the link during the alignment process (up = green,
down = red).

6.6.2 Behaviour During Installation

The following behavior should be noted:
•
Band scan: When first started up and from time to time, the Master unit will carry out a
band scan to determine which channels are not in use. During this time, between 10 and
15 seconds, the Master unit will not transmit and as a consequence of this neither will the
Slave unit. During this time the installation tone on the master unit will drop back to the
band scan state, and the Slave unit will drop back to the Scanning state with the pitch of
the tone set to the background noise level. Alignment of the unit should cease during this
time.
•
Radar detection: If the unit is operating where mandatory radar avoidance algorithms
are implemented, the ranging behaviour for the bridge may be affected. The Master has
to monitor the initially chosen channel for 60 seconds to make sure it is clear of radar
signals before transmitting. If a radar is detected during any of the installation phases, a
further compulsory 60 seconds channel scan will take place as the master unit attempts
to locate a new channel that is free of radar interference.
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6 Installation