Ebyte E104-BT20, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT20 User Manual
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Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.
21
9.3 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;
The clock waveform on the SPI is not standard: Check whether there is interference on the SPI line or the SPI bus line
should not be too long.
10. Soldering Guidance
10.1 Reflow Soldering Temperature
Profile Feature Curve characteristics Sn-Pb Assembly Pb-Free Assembly
Solder Paste Solder paste Sn63/Pb37 Sn96.5/Ag3/Cu0.5
Preheat Temperature min (Tsmin) Min preheating temp. 100
℃
150
℃
Preheat temperature max (Tsmax) Mx preheating temp. 150
℃
200
℃
Preheat Time (Tsmin to Tsmax)(ts) Preheating time 60-120 sec 60-120 sec
Average ramp-up rate(Tsmax to Tp) Average ramp-up rate 3
℃
/second max 3
℃
/second max
Liquidous Temperature (TL) Liquid phase temp. 183
℃
217
℃
Time(tL)Maintained Above(TL)
Time below liquid
phase line
60-90 sec 30-90 sec
Peak temperature(Tp) Peak temp. 220-235
℃
230-250
℃
Average ramp-down rate(Tp to Tsmax)
Average ramp-down
rate
6
℃
/second max 6
℃
/second max
Time 25
℃
to peak temperature
Time to peak
temperature for 25
℃
6 minutes max 8 minutes max