Cambium Networks cnReach N500 Handleiding (253 Pagina's)

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cnReach N500 User Guide System Configuration

phn-4980_001v004 August 2019)

2-30

Max Payload Bytes

Max Payload Bytes for Access Point and End Point range from 64 to 1600 Bytes with a default setting

of

256. These settings are also referred to as “packet sizes”. To achieve high user data rates, larger

packets and higher modulation levels are required. In one slot time, there are fixed delays that are not a

function of packet size or data rate, so as more data is sent in a packet per slot time, the utilization

increases.

In noisy RF environments, small packets with faster, more complex modulation will help the radio get on

and off channels as quickly as possible to help mitigate bit error and packet loss.

If a targeted data rate is desired, there are multiple options of packet size and modulation that will

result with a similar data rate. The choice of shorter packets with more complex modulation or longer

packets with simpler modulation will be determined by the noise level in the environment.

Attention

Max Payload Bytes is one of the most commonly mis-configured parameters. Not only

must the value match for all radios in a PTP link or PMP cluster but they must be

compatible with the selected modulation or transmit modes. See the tables in Chapter 3:

Technical Reference for the tables associated with the band you are using.

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