Ebyte E30-490T20S, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co,;Ltd E30 -490T20S user manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co,;Ltd
17
 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.
9.2 Module is easy to damage
 Please check the power supply source, ensure it is 2.0V~3.6V, voltage higher than 3.6V 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.
9.3 BER(Bit Error Rate) is high
 There is co-channel signal interference nearby, please be away from interference sources or modify frequency an d
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;
10 Production guidance
10.1 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℃
Time
（
tL
）
M aintained Above
（
TL
）
60-90 sec 30-90 sec
Peak temperature
（
Tp
）
220-235℃ 230-250℃
Average ramp -down rate
（
Tp to Tsmax
）
6℃/second max 6℃/second max
Time 25℃ to peak temperature 6 minutes max 8 minutes max