WaveRider LMS4000 User Manual page 88

5 Radio Network Planning
provide enough time and resources for the engineering team to verify the design in the field
through testing and signal-level measurements.
Once you have established your CAP sites on the air, you can verify received signal levels
throughout the network using a portable spectrum analyzer. You can then compare these with
those predicted by the RF system design. In many cases, discrepancies between predicted
and actual results can be corrected, if necessary, through adjustment of antenna azimuths
and/or down-tilting.
As the system grows and capacity is added, the frequency plan may have to be adjusted and
more attention given to fine-tuning the isolation between CAP sites.
Verification Checklist
When reviewing and verifying the design of a multi-CAP network, here is a checklist of items
that might be considered:
• General system design considerations:
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• CAP-to-CAP frequency assignments and isolation, achieved through
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• CAP-to-EUM propagation must provide coverage to all EUMs from selected sites. Run
the RF model with the specified system parameters to verify thorough propagation.
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Paging transmitters
Cellular transmitters
In-band interference
Frequency assignments
Lowering antenna heights,
Antenna mounting, and the use of mounting structures to achieve greater
isolation (building, towers),
Antenna radiation patterns (directionality and side lobes), and
Antenna characteristics, back to front isolation.
APCD-LM043-4.0