Ebyte E22-400T33S, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T33S User Manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd.
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10 FAQ
10.1 Communication range is too short

The communication distance will be affected when obstacle exists.

Data lose rate will be affected by temperature, humidity and co-channel interference.

The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground.

Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.

The signal will be affected when the antenna is near metal object or put in a metal case.

Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the distance).

The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the transmitting
power.

Due to antenna quality or poor matching between antenna and module.
10.2 Module is easy to damage

Please check the power supply source, ensure it is in right range, voltage higher than max value will damage the module.

Please check the stability of power source, the voltage cannot fluctuate too much.

Please make sure antistatic measure are taken when installing and using, high frequency devices have electrostatic susceptibility.

Please ensure the humidity is within limited range, some parts are sensitive to humidity.

Please avoid using modules under too high or too low temperature.
10.3 BER(Bit Error Rate) is high

There are co-channel signal interference nearby, please be away from interference sources or modify frequency and
channel to avoid interference;

Poor power supply may cause messy code. Make sure that the power supply is reliable.

The extension line and feeder quality are poor or too long, so the bit error rate is high;
11 Production guidance
11.1 Reflow soldering temperature
Profile Feature Sn-Pb Assembly Pb-Free Assembly
Solder Paste Sn63/Pb37 Sn96.5/Ag3/Cu0.5
Preheat Temperature min
（
Tsmin
）
100℃ 150℃
Preheat temperature max (Tsmax) 150℃ 200℃
Preheat Time (Tsmin to Tsmax)(ts) 60-120 sec 60-120 sec
Average ramp-up rate(Tsmax to Tp) 3℃/second max 3℃/second max
Liquidous Temperature (TL) 183℃ 217℃