User's Manual

Using Radio Link
• If there are too many communications errors, first make sure that the BHT
points directly at an access point because the 2.4-GHz band requires a
more or less straight line path. Note also that the low-power radio waves
have trouble passing through human bodies and other obstacles along
that path.
• This link will not operate properly in the vicinity of microwave ovens, in-
dustrial heaters, high-frequency medical equipment, and other sources of
radio waves in the 2.4-GHz band.
• Electromagnetic noise from personal computers, refrigerators, and other
home appliances can also interfere with link operation.
• Environmental factors that can also interfere with link operation include
large metallic objects, metallic dust, or metallic walls in the vicinity of the
path and vibration at either end.
To System Designers:
• Before developing the application, make sure that the intended
environment is free of the interference factors above and thus actually
capable of supporting link operation.
• Assume that there will be communications failures requiring robust retry
capabilities in the software.