Faq; Communication Range Is Too Short; Module Is Easy To Damage; Ber(Bit Error Rate) Is High - Ebyte E220-900M22S Manual

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6 FAQ

6.1 Communication range is too short

When there is a linear communication obstacle, the communication distance will be attenuated accordingly;
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Temperature, humidity and co frequency interference will increase the packet loss rate;
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The ground absorbs and reflects radio waves, and the test effect near the ground is poor;
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Seawater has a strong ability to absorb radio waves, so the seaside test effect is poor.
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If there are metal objects near the antenna or placed in the metal shell, the signal attenuation will be very serious;
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Power register setting error, air speed setting too high (the higher the air speed, the closer the distance);
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The lower the voltage is, the smaller the power is;
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The matching degree between the antenna and the module is poor or the quality of the antenna itself is poor.
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6.2 Module is easy to damage

Please check the power supply to ensure that it is between the recommended supply voltage. If it exceeds the
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maximum value, the module will be permanently damaged.
Please check the stability of the power supply. The voltage should not fluctuate greatly and frequently.
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Please ensure that the installation process of anti-static operation, high-frequency device electrostatic sensitivity.
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Please ensure that the humidity should not be too high during installation and use, and some components are
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humidity sensitive devices.
If there is no special requirement, it is not recommended to use it at too high or too low temperature.
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6.3 BER(Bit Error Rate) is high

If there is interference of the same frequency signal nearby, stay away from the interference source or modify the
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frequency and channel to avoid interference;
The clock waveform on SPI is not standard, check whether there is interference on SPI line, and SPI bus line should
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not be too long;
If the power supply is not ideal, it may cause garbled code, so it is necessary to ensure the reliability of the power
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supply;
If the quality of extension line and feeder is poor or too long, the bit error rate will be high;
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E220-900M22S User Manual
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