Denso BHT-1170BWB-CE User Manual

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Denso BHT-1170BWB-CE User Manual Manual pdf 148 page image

135Barcode Handy Terminal5.3 Wireless CommunicationThe BHT is equipped with a 2.4 GHz waveband wireless module.5.3.1 Usage Precautions• It may be possible to avoid the easy occurrence of communication errors by pointing the right side of theBHT (equipped with built-in antenna) toward the access point. This is because the radio waves of the2.4 GHz waveband on which the BHT operates are emitted straight ahead and do not easily passthrough the human body and so on.• Communication may not be possible when used in the vicinity of wireless devices, microwave ovens,industrial heating equipment or high-frequency medical equipment operating on the same 2.4 GHzwaveband as the BHT.• Communication may not be possible due to electromagnetic noise when the BHT is used in the vicinityof household appliances such as computers or refrigerators.• Communication may not be possible in the following locations.- In the vicinity of metal objects or in places with high levels of metallic dust- Rooms surrounded by metal walls- Places subject to strong impact− Point − Requests to System Designersz Communication may not be possible depending on the environment in which the device is beingused. Ensure that problem-free communication is possible prior to use.z Use a program capable of retransmitting data if communication fails.z If the BHT is introduced into an environment in which a device using 2.4 GHz wavebandelectromagnetic waves is operating, or if another device using 2.4 GHz waveband electromagneticwaves is introduced following introduction of the system, run all devices and ensure thatcommunication with the BHT is possible prior to use.z Check communication once again prior to use if any changes are made to the usage environment(addition of household appliances, movement or addition of shelves, equipment and so on)following introduction of the system.− Point − Wireless LAN InterferenceIn addition to industrial, scientific, and medical equipment such as microwave ovens, static wirelessstations (permit required) used for mobile identification in places such as plant manufacturing lines,amateur wireless stations, and specified low-power wireless stations (no permit required) operate onthe same frequency band as this device.1. Before using this device, ensure that no static wireless stations or specified low-power wirelessstations for mobile identification are being used in the vicinity.2. In the event of instances of electromagnetic interference from this device to a static wirelessstation being used for mobile identification, either promptly alter the usage frequency, or halt theelectromagnetic discharge.