Module Is Easy To Damage; Ber Is Too High; Welding Work Instruction; Reflow Temperature - Ebyte E22-400M33S User Manual

6.2 Module is easy to damage

Please check the power supply to ensure that it is within the recommended value. If it exceeds the maximum value,

the module will be permanently damaged;
Please check the stability of power source, the voltage cannot fluctuate too much.

Please make sure anti-static measures 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.


6.3 BER is too high

There is interference from the same frequency signal nearby, stay away from the interference source or modify the

frequency and channel to avoid interference.
The clock waveform on the SPI is not standard, check whether there is interference on the SPI line, and the SPI bus

alignment should not be too long.
Unsatisfactory power supply may also cause garbled code, be sure to ensure the reliability of the power supply.

Poor quality or too long extension cable or feeder line may also cause high BER.


7. Welding work instruction

7.1 Reflow Temperature

Profile Feature
Solder Paste
Preheat Temperature min （Tsmin）
Preheat temperature max (Tsmax)
Preheat Time (Tsmin to Tsmax)(ts)
Average ramp-up rate(Tsmax to Tp)
Liquidous Temperature (TL)
Time（tL）Maintained Above（TL）
Peak temperature（Tp）
Aveage ramp-down rate（Tp to Tsmax）
Time 25℃ to peak temperature

7.2 Reflow Profile

Curve characteristics
Solder Paste
Minimum preheating
temperature
Maximum preheating
temperature
Warm-up time
Average rise rate
liquid phase temperature
Time above the liquid
phase line
Peak temperature
Average drop rate
Time from 25°C to peak
temperature
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E22-400M33S User Manual
Sn-Pb Assembly
Sn63/Pb37
100℃
150℃
60-120 sec
3℃/second max
183℃
60-90 sec
220-235℃
6℃/second max
6 minutes max
Pb-Free Assembly
Sn96.5/Ag3/Cu0.5
150℃
200℃
60-120 sec
3℃/second max
217℃
30-90 sec
230-250℃
6℃/second max
8 minutes max