User Manual Part 7

Navini Networks, Inc. Ripwave Base Station I&C Guide
117
Notice that, in this example, one cable combination is Not Available (there is no Loss data for
that main Cable at the selected Frequency Band), one cable combination exceeds the maximum
weight allowed, two Main Cables are not flexible enough to be bent as required and four cable
combinations were eliminated because they cannot deliver the desired level of TX Power at the
antenna elements.
At this point you could repeat the calculations with a different type of jumper cable and compare
the results.
In this example, eleven cable combinations have been identified which meet all the requirements
of the system. Now the question is “which one should be used?” To answer this question, other
factors such as cable cost or company policy can be taken into consideration.
Finally, keep in mind that if you select a cable combination that barely meets the requirements,
specially for TX Power (but sometimes also for RX Sensitivity), and over time the performance
of your system degrades, one or both of these parameters may fall out of range and your system
would become impossible to calibrate forcing you to reduce the TX Power or rise the RX
Sensitivity, thus reducing the capacity and/or coverage radius of your system.