Wireless communication between sensors and the Trigno base station occurs on varieties of frequencies throughout the acceptable 2.4 GHz spectrum (2400–2438 MHz). Four frequency sets are available (“A”, “B”, “C” and “D”). The default set is “A”. Since the effective radiated power is very low (9 mW) and hence the typical operating range is smaller then 40 m, no interference with other RF sources has been reported so far.
That said this equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. There is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into outlet on a separate circuit.
- Change the Frequency Set. Note that changing the communication frequency set will require sensor re-pairing. Frequencies within the sets are defined by the system and cannot be changed by the User.