Chapter 3 Frequently Asked Questions; The Transmission Distance Is Not Ideal; Modules Are Easily Damaged; The Bit Error Rate Is Too High - Ebyte E77-400MBL-01 User Manual

Chengdu Ebyte Electronic Technology Co., Ltd

Chapter 3 Frequently Asked Questions

3.1 The transmission distance is not ideal

When there is a linear communication obstacle, the communication distance will be attenuated accordingly;
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Temperature, humidity, and co-channel interference will lead to an increase in the packet loss rate of communication;
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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 is a metal object 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 rate is set too high (the higher the air rate, 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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smaller the power;
The use of antennas is poorly matched with the module or the quality of the antenna itself.
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3.2 Modules are easily damaged

Please check the power supply to ensure that between the recommended supply voltage, if the maximum value is exceeded, it
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will cause permanent damage to the module;
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 and use process of anti-static operation, high-frequency devices electrostatic sensitivity;
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Please ensure that the humidity during installation and use should not be too high, and some components are humidity sensitive
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devices;
If there is no special need, it is not recommended to use it at too high or too low temperature.
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3.3 The bit error rate is too high

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