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D.11, Latency and packetization – B&B Electronics ZXT9-RM-KIT - Manual User Manual

Page 164

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Document Number: pnZXTxRM-0712m

Page
164

While long cable runs to an antenna create signal loss, the benefit of elevating the antenna another
25 feet (7.6 m) can more than compensate for those lost dB.

D.11

Latency and Packetization

Before you lift a finger towards the perfect wireless installation, think about the impact of wireless
communications on your application. Acceptable bit error rates are many orders of magnitude
higher than wired communications. Most radios quietly handle error detection and retries for you -
at the expense of throughput and variable latencies.

Software must be well designed and communication protocols must be tolerant of variable
latencies. Not every protocol can tolerate simply replacing wires with radios. Protocols sensitive to
inter-byte delays may require special attention or specific protocol support from the radio. Do your
homework up front to confirm that your software won‟t choke, that the intended radio is friendly
towards your protocol, and that your application software can handle it as well.