Jeweller radio communication range
This page explains factors that affect the quality of radio communication and technologies that enable Ajax devices to consistently transmit events and alarms over long distances.
of the system, you will better understand the specifics of the operation of devices that ensure your security.
working with the system, you will be able to unleash the potential of Jeweller radio protocol and avoid mistakes when installing devices.
Factors affecting the radio communication range
Effect of obstacle material on a radio signal
Low signal absorption coefficient — up to 3 dB
Dry red brick 90 mm thick
Gypsum board 100 mm thick
Dry wood 80 mm thick
Glass 15 mm thick
Average signal absorption coefficient — 5-20 dB
Brick 250 mm thick
Breeze block 200 mm thick
Concrete 100 mm thick
Masonry 200 mm thick
More than 20 dB. Signal absorption coefficient
Concrete 300 mm thick
Reinforced concrete 200 mm thick
Aluminum and steel beams
Large aquarium filled with water
Obstacles reflecting signals
Signal strength decrease to 10%
Calculating the radio communication range of Ajax devices
No theory — just practical trials with devices from retail distribution. The trials are carried out at a test site with minimum radio noise and favorable weather conditions: a constant exchange of data between the hub and the device is maintained, with the distance between them gradually increasing. As soon as the hub ceases to acknowledge the reception of events, the communication range is recorded. After confirming the value with several tests, the device is assigned the "communication range" characteristic.This is an industry-standard approach to communication range determination required to compare devices within the same manufacturer's product line and competing solutions from different manufacturers.
Why Ajax devices have different radio communication ranges
How the reliability of radio communication in Ajax systems is ensured
An Ajax hub/range extender has two multi-directional antennas for Jeweller frequencies oriented 90 degrees against each other.Hubs with photo verification support have dedicated antennas for Wings frequencies. They are also oriented at an angle of 90 degrees against each other.