ABB GJR5253100R1260模块参详
ABB GJR5253100R1260模块参详
ABB GJR5253100R1260模块参详
超外差接收模块
超外差接收模块的体积:35x13x8毫米
主要技术指标:
1、通讯方式:调幅AM
2、工作频率:316.8MHZ
3、频率稳定度:±75KHZ
4、接收灵敏度:-102dBm
5、静态电流:≤5mA
6、工作电流:≤5mA
7、工作电压:DC 5V
8、输出方式:TTL电平
这里提供的超外差接收模块采用进口·性能无线遥控及数传·用集成电路RX3310A,并且采用316.8M声表谐振器,所以工作稳定可靠,适合比较恶劣的环境下全天候工作。
RX3310A集成电路介绍:
RX3310A是台湾HMARK公司生产的专门用于幅度键控ASK调制的无线遥控及数传信号的接收集成电路,内含低噪音高频放大、混频器、本机振荡、中频放大器、中频滤波器、比较器等,为一次变频超外差电路,双列18脚宽体贴片封装,主要技术指标如下:
工作频率:150~450MHZ
工作电压:2.7~6V
工作电流:2.6mA(3V电源时)
接收灵敏度:-105dBm(1K数据速率而且天线匹配时)
·高数据速率:9.6KBPS
从外接天线接收的信号经C8耦合到L3、C9组成的选频网络进行阻抗变换后输入RX3310的内部高频放大器输入端14脚,经芯片内的高频放大后(增益为15~20dB)的信号再经混频器与本机振荡信号(316.8M)混频,产生1.8M的中频信号,此中频信号经内部中频放大后由第3脚输出,再进入比较器放大整形,·后数据从第8脚输出。
超外差接收机对天线的阻抗匹配要求较高,要求外接天线的阻抗·须是50欧姆的,否则对接收灵敏度有很大的影响,所以如果用1/4波长的普通导线时应为23厘米·佳,要尽可能减少天线根部到发射模块天线焊接处的引线长度,如果无法减小,可以用特性阻抗50欧姆的射频同轴电缆连接(天线焊点右侧有一个专门的接地焊点)
1771-IFE 48716
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