Noraxon myoMOTION 682, User Manual

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Noraxon U.S.A., Inc. myoMOTION Data Logger
P-6828 Rev A (Oct 2014)
23
Radio Considerations
The myoMOTION radio system operates in the 2400 MHz ISM (Industrial, Scientific and Medical)
radio band reserved for use in most countries of the world. The radio transfers data digitally using
a proprietary wireless sensor protocol. Other devices operating in this frequency band include
computer networks, microwave ovens, cordless phone sets and other WiFi enabled devices.
Despite all this competing radio activity the myoMOTION System is able to discern its particular
information from all the surrounding radio traffic. Reliable transmission depends on good signal
quality. Signal quality will fall with extended distances between the myoMOTION Data Logger and
the myoMOTION Sensors. Obstructions (walls, metal structures, trees, etc.) between the
myoMOTION Data Logger and the myoMOTION Sensors will also lower the signal quality.
While the myoMOTION System is quite immune to interference, it does transmit a deliberate
radio signal that could affect nearby sensitive equipment. Users should always be aware of this
possibility. In a similar manner, although the energy level of the radio is considered harmless to
human beings, it is still prudent to minimize exposure.
Finally, although available worldwide, each country places certain restrictions on the operation of
radios in the 2400 MHz ISM band. These restrictions include allowable transmitter power levels
and broadcast frequencies.
Setting the Sensor RF Channel
The Sensor RF Channel is the frequency used for communication between the myoMOTION
Data Logger and the myoMOTION Sensors. Typically, the default option of RF Channel “A” (as
set inside MR3), works well. However, sometimes there is a lot of WiFi traffic in the area that may
affect the data transmission between the myoMOTION Data Logger and the myoMOTION
Sensors.
If there is too much traffic on the selected RF Channel, significant data loss may occur. In order to
avoid data loss, changing the RF Channel to another frequency may solve the problem.
If the RF Channel needs to be changed, select a different letter in MR3 myoMOTION Settings
and take another measurement to determine if the data loss problem is resolved.
If data loss is still a problem, please refer to Appendix A for instructions to select another RF
Channel. Appendix B shows the actual frequency of each Sensor RF Channel. This information
may be helpful in determining the best Sensor RF Channel.