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Eliminating noise in 433 MHz receiver module

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Tulkas

Tulkas

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i have a 433MHz receiver module, some pins are connected to 5V and GND, one of those pins is the output, i have connected this pin to an oscilloscope and only i can see noise. How can i eliminate this noise, i want to see the code of a garage control for example.

Sorry for my English.
 

Re: 433 MHz module

Time ago I used one of this modules. You must live with this noise when there is no RF signal, due some super-regenerative receivers work as limiter and always get output signal. Your digital correlator must look for the proper signal.

If your module has a indicator of receiber level, you can validate data only when enoug signal is present.

TaPa
 

433 MHz module

Recently I am testing an RF module, not 433MHz but in L1 frequency. If no RF tone present, the output will be all noise. But if the module has a BPF, you can see the noise has the BPF contour. Use a Signal Gen to input an RF signal and probe the output to verify the module.
 

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