Motorola Canopy 300 Mbps Backhaul User Manual page 49

The following behaviour should be noted:
•
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 Scanning state with the pitch of the tone set be
the background noise level. Alignment of the unit should cease during this time.
•
The master unit can take up to 60 seconds in 0-40km mode, 90 seconds in 0-130km
mode and 120 seconds in 0-200km mode to determine the range of the link being
installed. The Master unit will remain in the Scanning state until the range of the link has
been established. The Master unit will only move to the Synchronized state when the
range of the link has been established.
•
If at the end of the ranging period the Registered state is not achieved due to interference
or other reasons, the Master unit will retry twice more on the same channel before
moving to another available channel. Should this occur it might take a number of minutes
to establish a link in the Registered state.
•
The Slave unit does not have a ranging process. The slave unit will change to the
Synchronized state as soon as the wanted signal is demodulated.
When the alignment process is complete the installer MUST REMEMBER TO DISARM BOTH
UNITS in the link as described in section 8.3.3. This is necessary in order to:
•
Turn off the audible alignment aid.
•
Enable Adaptive Modulation.
•
Fully enable Spectrum Management (iDFS).
•
Clear unwanted installation information from the various systems statistics.
•
Store the link range for fast link acquisition on link drop.
•
Enable Higher Data Rates.
Issue 1.1 April 2006 Page 48