Ber(Bit Error Rate) Is High; Guide For Soldering Work; Reflow Soldering Temperature - Ebyte E49-400M20S4 Manual

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Please ensure the humidity is within limited range, some parts are sensitive to humidity
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Please avoid using modules under too high or too low temperature.
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6.3 BER(Bit Error Rate) is high

There are co-channel signal interference nearby, please be away from interference sources or modify frequency and
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channel to avoid interference;
The clock waveform on SPI is not standard, check whether there is interference on the SPI line, and the SPI bus line
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should not be too long;
Poor power supply may cause messy code. Make sure that the power supply is reliable;
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The extension line and feeder quality are poor or too long, so the bit error rate is high.
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7 Guide for Soldering work

7.1 Reflow soldering 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
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Curve characteristics
Solder paste
Min preheating temp
Mx preheating temp
Preheating time
Average ramp-up rate
Liquid phase temp
Time below liquid phase line
Peak temp
Aveage ramp-down rate
Time to peak temperature for
25℃
E49-400M20S4 产品规格书
Sn-Pb Assembly Pb-Free Assembly
Sn63/Pb37
100℃
150℃
60-120 sec
3℃/second max
183℃
60-90 sec
220-235℃
6℃/second max
6 minutes max
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
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