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When setting up your monitoring system, especially using the wireless devices, a network planning is crucial to know how far your wireless signals will go and ultimately define how many receivers/gateways are required (RMS-GW-868/915 devices).

 

The Rotronic Monitoring System can measure the receiver sensitivity in dBm. A dBm is a relative measurement using logarithms. One milliwatt is 0 dBm, ten milliwatts is 10 dBm, one hundred milliwatts is 20 dBm and so on.

 

Rotronic specifies that above -60 dBm that the wireless communication is at its best. Between -60 and -85 dBm, communication exists but communication breaks may occur. Under -85 dBm is not recommended. The negative number indicates a very small signal (tiny fractions of a milliwatt).