This paper records the process of 433.92 TX RX module  design and test，fyi。

 

 1 RX module 

         The circuit shown in Fig 1，The super-heterodyne FM receiver RX with High sensitivity and selectivity. It is equipped by front-end SAW filter that allows an High noise immunity. Enable pin allows to reach power-down mode to reduce the power consumption up to 0,5 uA. Ideal for Microchip Keeloq decoders

      

 

                                                     Fig 1 circult

  

                                    

 

  2 TX module

        TX module  is more complicated than rx module.