Denso Wave BHT400SLBWB Manuale Utente
17
Using Radio Link and Bluetooth
®
Wireless
Communication Link
The BHT-400BB- CE/400BWB- CE supports spread spectrum communication.
• If there are too many communications errors, first make sure that the
BHT-400BB- CE/400BWB- CE 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.
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, industrial
heaters, high-frequency medical equipment, and other sources of radio waves in
the 2.4-GHz band.
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.
vibration at either end.
• In the vicinity of wireless LAN devices using radio waves in the 2.4 GHz band,
Bluetooth
®
wireless communication link operation may cause interference to radio
communications, resulting in decreased communications speed or
communications failures.
communications failures.
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.
capable of supporting link operation.
• Assume that there will be communications failures requiring robust retry
capabilities in the software.
• When introducing the BHT link operation into an environment where
equipment using radio waves in the 2.4-GHz band operates or when
introducing such equipment after the introduction of the BHT link
operation, be sure to confirm that the BHT radio link operates properly
with all equipment being in operation beforehand.
introducing such equipment after the introduction of the BHT link
operation, be sure to confirm that the BHT radio link operates properly
with all equipment being in operation beforehand.
• If the environment of the radio communications system is changed after
the introduction (e.g., newly installed household appliances and
movement/addition of shelves or objects), then confirm that the radio link
operates properly again before the actual use.
movement/addition of shelves or objects), then confirm that the radio link
operates properly again before the actual use.