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Chengdu Ebyte Electronic Technology Co., Ltd.
E220-900T30D User Manual
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 1s 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 1s 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) 1s 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.
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