通用型3BHE014185R0002 UU D148 AE02
通用型3BHE014185R0002 UU D148 AE02
通用型3BHE014185R0002 UU D148 AE02
通用型3BHE014185R0002 UU D148 AE02说明书
通用型3BHE014185R0002 UU D148 AE02原理图
通用型3BHE014185R0002 UU D148 AE02接线图
3BHE014185R0002 UU D148 AE02数据发射模块的工作频率为315MHz，采用声表谐振器SAW稳频，频率稳定度·高，当环境温度在－25～+85度之间变化时，频飘仅为3ppm/度。特别适合多发一收无线遥控及数据传输系统。声表谐振器的频率稳定度仅次于晶体，而一般的LC振荡器频率稳定度及一致性较差，即使采用高·质微调电容，温差变化及振动也很难保证已调好的频点不会发生偏移。
3BHE014185R0002 UU D148 AE02发射模块未设编码集成电路，而增加了一只数据调制三极管Q1,这种结构使得它可以方便地和其它固定编码电路、滚动码电路及单片机接口，而不必考虑编码电路的工作电压和输出幅度信号值的大小。
3BHE014185R0002 UU D148 AE02比如用PT2262或者SM5262等编码集成电路配接时，直接将它们的数据输出端第17脚接至数据模块的输入端即可。
3BHE014185R0002 UU D148 AE02数据模块具有较宽的工作电压范围2.1～3.5V，当电压变化时发射频率基本不变,和发射模块配套的接收模块无需任何调整就能稳定地接收。当发射电压为3V时，空旷地传输距离约20～50米，发射功率较小，当电压5V时约100～200米，当电压9V时约300～500米，当发射电压为12V时，为·佳工作电压，具有较好的发射效果，发射电流约60毫安，空旷地传输距离700～800米，发射功率约500毫瓦。
3BHE014185R0002 UU D148 AE02当电压大于l2V时功耗增大，有效发射功率不再明显提高。这套模块的特点是发射功率比较大，传输距离比较远，比较适合恶劣条件下进行通讯。天线·好选用25厘米长的导线，远距离传输时·好能够竖立起来，因为无线电信号传输时收很多因素的影响，所以一般实用距离只有标称距离的一半甚至更少，这点需要开发时注意。
3BHE014185R0002 UU D148 AE02数据模块采用ASK方式调制，以降低功耗，当数据信号停止时发射电流降为零，数据信号与发射模块输入端可以用电阻或者直接连接而不能用电容耦合，否则发射模块将不能正常工作。数据电平应接近数据模块的实际工作电压，以获得较高的调制效果。
3BHE014185R0002 UU D148 AE02发射发射模块·好能垂直安装在主板的边缘，应离开周围器件5mm以上，以免受分布参数影晌。模块的传输距离与调制信号频率及幅度，发射电压及电池容量，发射天线，接收机的灵敏度，收发环境有关。
3BHE014185R0002 UU D148 AE02一般在开阔区·大发射距离约800米，在有障碍的情况下，距离会缩短，由于无线电信号传输过程中的折射和反射会形成一些死区及不稳定区域，不同的收发环境会有不同的收发距离。
25B-D6P0N1142个
SDB/COMPACT7M2-2BB2 1个
3BHE028915R0101 PC D237 A101 2个
3BHE023584R2441 PP D113 24-110110 1个
3BHE014185R0001 UU D148 AE01 1个
3BHE014185R0002 UU D148 AE02 1个
3BSE013231R1 TU811V1 4个
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3BSE008508R1 DI810 2个
3BSE008516R1 AI810 2个
3BSE008552R1 DI811 2个
3BSE008514R1 DO820 4个
3BSE013208R1 TB820V2 2个
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ACCURAY 082157-002 082157002