JUMO 707060 Wtrans B - Programmable Head Transmitter with Radio Transmission Operating Manual - Manual (Page 16)

4 Probe range
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4.2 Possible impairment of radio transmission
Collisions when using an excessive number of probes
When using a large number of probes, do not select a transmission interval which is too low,
otherwise the radio channel will be unnecessarily occupied. A too low transmission interval
means a very high data volume on the selected frequency which can lead to collisions with oth-
er probes. Telegrams can be destroyed during radio transmission caused by collisions.
Figure 1: The telegrams of a probe reach the receiver without collisions.
Figure 2: Telegrams of several probes can collide.