Faq; Transmission Distance Is Not Ideal; Module Is Easy To Damage; Bit Error Rate Is Too High - Ebyte E31-433T17S User Manual

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9 FAQ

9.1 Transmission distance is not ideal

 When there is a linear communication obstacle, the communication distance will be correspondingly reduced;
 Temperature, humidity, and co-channel interference will lead to an increase in communication packet loss rate;
 The ground absorbs and reflects radio waves, so the test results close to the ground are poor.
 Seawater has a strong ability to absorb radio waves, so the seaside test results are poor.
 There are metal objects near the antenna, or placed in the metal shell, the signal attenuation will be very serious;
 Power register setting error, air data rate setting is too high (the higher the air data rate, th e closer the distance);
 The low voltage of the power supply is lower than the recommended value at room temperature, and the lower the
voltage, the smaller the power;
 The matching degree of antenna and module is poor, or the quality of the antenna itself.

9.2 Module is easy to damage

 Please check the power supply to ensure that it's within the recommended power supply, or the module will be
permanently damaged if it exceeds the maximu m value.
 Check the stability of the power supply and the voltage cannot be fluctuated frequently.
 Please ensure that the installation process is anti-static, and the high-frequency components are electrostatically
sensitive.
 Please ensure that the humidity during installation and use is not too high because some components are h umidity
sensitive devices.
 If there is no special demand, it is not recommended to use it at too high or too low temperature.

9.3 Bit error rate is too high

 There are co-channel signal interference nearby, away from interference sources or modify frequency and channel
to avoid interference;
 The undesirable power supply may also cause messy code, and ensure the reliability of the power supply.
 The quality of extension line and feeder are poor or too long, which also cause high bit error rate;

10 Welding operation guidance

10.1 Reflow temperature

Profile Feature
Solder Paste
Preheat Temperature min （Tsmin）
Preheat temperature max (Tsmax)
Preheat Time (Tsmin to Tsmax)(ts)
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Curve feature
Solder paste
M in. preheating temperature
M ax. preheating temperature
Preheating time
Sn-Pb Assembly Pb-Free Assembly
Sn63/Pb37
100℃
150℃
60-120 sec
E31-433T17S User Manual
Sn96.5/Ag3/Cu0.5
150℃
200℃
60-120 sec
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