Chapter 11 Frequently Asked Questions; The Transmission Distance Is Not Ideal; Modules Are Easily Damaged; Ber Is Too High - Ebyte E22-400T30S User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.

Chapter 11 Frequently Asked Questions

11.1 The transmission distance is not ideal

When there is a straight-line communication obstacle, the communication distance will be attenuated accordingly;
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Temperature, humidity, and co-channel interference will increase the communication packet loss rate;
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The ground absorbs and reflects radio waves, and the test effect is poor when it is close to the ground;
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Seawater has a strong ability to absorb radio waves, so the seaside test effect is poor;
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There are metal objects near the antenna, or placed in a metal case, the signal attenuation will be very serious;
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The power register is set incorrectly, and the air speed is set too high (the higher the air speed, the closer the distance);
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The low voltage of the power supply at room temperature is lower than the recommended value, and the lower the voltage, the
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lower the output power;
The matching degree between the antenna and the module is poor or the quality of the antenna itself is problematic.
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11.2

Modules are easily damaged

Please check the power supply to ensure that it is within the recommended power supply voltage. If it exceeds the maximum
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value, it will cause permanent damage to the module;
Please check the stability of the power supply, the voltage cannot fluctuate greatly and frequently;
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Please ensure anti-static operation during installation and use, and high-frequency devices are electrostatically sensitive;
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Please ensure that the humidity during installation and use should not be too high, some components are humidity sensitive
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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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11.3 BER is too high

There is co-channel signal interference nearby, stay away from the source of interference or modify the frequency and channel to
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avoid interference;
Unsatisfactory power supply may also cause garbled characters, so be sure to ensure the reliability of the power supply;
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Poor quality or too long extension cables and feeders will also cause high bit error rates.
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E22-400T30S_User Manual _EN