Communication Range Is Too Short; Module Is Easy To Damage; Ber(Bit Error Rate) Is High - Ebyte E49-900T20S User Manual

Chengdu Ebyte Electronic Technology Co., Ltd
9. FAQ

9.1 Communication range is too short

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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Sea water 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
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distance).
The power supply low voltage under room temperature is lower than recommended value, the lower the voltage, the
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lower the transmitting power.
Due to antenna quality or poor matching between antenna and module.
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9.2 Module is easy to damage

Please check the power supply to ensure that it is between the recommended power supply voltage. If the maximum
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value is exceeded, the module will be permanently damaged.
Please check the stability of power source, the voltage cannot fluctuate too much.
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Please make sure anti-static measure are taken when installing and using, high frequency devices have electrostatic
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susceptibility.
Please ensure the humidity is within limited range, some parts are sensitive to humidity.
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Please avoid using modules under too high or too low temperature.
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9.3 BER(Bit Error Rate) is high

There are co-channel signal interference nearby, please be away from interference sources or modify frequency and
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channel to avoid interference;
Poor power supply may cause messy code. Make sure that the power supply is reliable.
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The extension line and feeder quality are poor or too long, so the bit error rate is high;
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E49-900T20S User Manual
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