Ebyte E104-BT40, User Manual, Page: 29 / 31

Chengdu Ebyte Electronic Technology Co.,Ltd. E104-BT40 User Manual
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co.,Ltd.
4-28
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The antenna installation structure has a great impact on the performance of the module. Be sure to keep the antenna
exposed, preferably vertically. When the module is installed inside the case, a high-quality antenna extension cable
can be used to extend the antenna to the outside of the case;
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The module must not be installed inside metal shield, which will greatly reduce the transmission distance.
8. FAQ
8.1 Communication range is too short
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The communication distance will be affected when obstacle exists.
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Data lose rate will be affected by temperature, humidity and co-channel interference.
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The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground.
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Seawater has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.
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The signal will be affected when the antenna is near metal object or put in a metal case.
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Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the
distance).
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When the power supply at room temperature is lower than the recommended low voltage, the lower the voltage is,
the lower the transmitting power is.
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The use of the antenna and the module is poorly matched or the quality of the antenna itself is defective.
8.2 Module is easy to damage
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Please check the power supply and ensure it is within the recommended range. Voltage higher than the peak will
lead to a permanent damage to the module.
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Please check the stability of power supply and ensure the voltage not to fluctuate too much.
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Please make sure anti-static measures are taken when installing and using, high frequency devices have electrostatic
susceptibility.
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Please ensure the humidity is within limited range for some parts are sensitive to humidity.
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Please avoid using modules under too high or too low temperature.
8.3 Bit error rate is too high
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When there are co-channel signal interference nearby, be away from interference sources or modify frequency and
channel to avoid interference;
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Unfavorable power supply may cause code error. Make sure that the power supply is reliable.
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The quality of extension cables and feeders is poor or too long can also cause high bit error rate.