Chengdu Ebyte Electronic Technology Co.,Ltd. E22-400T22D User ManualCopyright ©2012–2019,Chengdu Ebyte Electronic Technology Co.,Ltd. 29. CONFIGURATION INSTRUCTIONS ON COMPUTER.........................................................1810. HARDWARE DESIGN............................................................................................................... 1911. FAQ................................................................................................................................................2011.1 COMMUNICATION RANGE IS TOO SHORT................................................................................................................... 2011.2 MODULE IS EASY TO DAMAGE...................................................................................................................................2011.3 BER(BIT ERROR RATE) IS HIGH................................................................................................................................2012. WELDING GUIDANCE............................................................................................................. 2113. E22 SERIES..................................................................................................................................2114. ANTENNA GUIDANCE..............................................................................................................2114.1 ANTENNA RECOMMENDATION................................................................................................................................... 21REVISION HISTORY....................................................................................................................... 22ABOUT US......................................................................................................................................... 22