Chengdu Ebyte Electronic Technology Co., Ltd.
E73-2G4M08S1E User Manual
Copyright ©2012–2018
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Chengdu Ebyte Electronic Technology Co., Ltd
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 recommended value, the lower the voltage, the
lower the transmitting power;
Due to antenna quality or poor matching between antenna and module.
6.2 Module is easy to damage
Please check the power supply and ensure it is within the recommended range. Voltage higher than the peak will
lead to a permanent damage to the module.
Please check the stability of power supply and ensure the voltage not to 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 for some parts are sensitive to humidity.
Please avoid using modules under too high or too low temperature.
6.3 BER(Bit Error Rate) is high
Here 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.
7 Production guidance
7.1 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)
Max 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
℃
Aveage 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
