Question:  What potential interference issues should I be aware of with Tempest 2400  and 2.4GHz Wi-Fi systems and Tempest 900 and ISM / Radio Location services?

Answer:
For the Tempest 2400, some customers may be concerned by potential interference with Wi‐Fi systems, which also uses the same 2.4 GHz spectrum. This is rarely an issue because of the differences in how the Tempest transmission scheme is designed. Wi‐Fi distributes its power across a 22 MHz wide frequency range, creating a relatively low‐level, broadband signal. 

The Tempest 2400 uses a similar amount of power, but concentrates its power into a narrow 1.5 MHz bandwidth. For these reasons, the Wi‐Fi signal appears to be in the noise floor of the Tempest 2400 RF signal. The Tempest 2400 also has a band adjustment feature to comply with international standards for the 2.4 GHz band, and to allow the user to avoid certain Wi‐Fi channels (frequencies) if desired.

The Tempest 2400 may, in certain circumstances, may receive or possibly create interference issues with lighting controllers and other proprietary devices that use the 2.4 GHz range. The Tempest 2400’s band adjustment features can also be used to help resolve these situations.










The 900MHz band is not specified in discrete channels the way that Wi‐Fi is and this frequency adjustment feature is not present on the Tempest 900.