Ebyte E220-900T22D, User Manual

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Chengdu Ebyte Electronic Technology Co., Ltd. E220-900T22D User Manual
Copyright ©2012–2020
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Chengdu Ebyte Electronic Technology Co., Ltd. 19
10. FAQ
10.1 Communication range is too short

When there is a straight-line communication obstacle, the communication distance will be attenuated accordingly;

Temperature, humidity, and co-frequency interference will increase the communication packet loss rate;

The ground absorbs and reflects radio waves, and the test results near the ground are poor;

Sea water has a strong ability to absorb radio waves, so the seaside test results are poor;

If there is a metal object near the antenna or placed in a metal shell, the signal attenuation will be very serious;

The power register setting is wrong, the air speed setting is too high (the higher the air speed, the closer the distance);

The low voltage of the power supply at room temperature is lower than the recommended value, the lower the voltage, the lower
the power output;
 The matching degree of the antenna and the module is poor or the quality of the antenna itself is problematic.
10.2 Module is easy to damage

Please check the power supply to ensure that it is within the recommended power supply voltage. If it exceeds the maximum
value, the module will be permanently damaged;

Please check the stability of the power supply, and the voltage should not fluctuate greatly and frequently;

Please ensure anti-static operation during installation and use, and high-frequency components are electrostatically sensitive;

Please ensure that the humidity during installation and use should not be too high, and some components are humidity sensitive
devices;

If there is no special requirement, it is not recommended to use it at too high or too low temperature.
10.3 BER (Bit Error Rate) is high

There is co-frequency signal interference nearby, stay away from the interference source or modify the frequency and channel to
avoid interference;

Unsatisfactory power supply may also cause garbled codes. Ensure the reliability of the power supply;

Poor or too long extension cables and feeders can also cause high bit error rates.