User's Manual

Chengdu Ebyte Electronic Technology Co., Ltd. E220-400T30S User manual

distance).

⚫ 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.

10.2 Module is easy to damage

⚫ Please check the power supply source, ensure it is in right range, voltage higher than max value 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.

10.3 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;

11 Production guidance

11.1 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

Average ramp-up rate(Tsmax to Tp)

3℃/second max

Liquidous Temperature (TL)

183℃

217℃

Time（tL）Maintained Above（TL）

60-90 sec

30-90 sec

Peak temperature（Tp）

220-235℃

230-250℃