I recently bought these RF modules.
The RX module outputs rail to rail square wave "noise" at around 6kHz. When the TX sends the noise stops and an obvious TX pulse appears, it then drops back to being noisy.
I want to use this to send a pulse that triggers an interrupt on an Arduino. Obviously with the noise it is impossible to use it directly, so I created a simple RC low pass filter (4kHz cut off) which works. But there is a big BUT here, my application is time sensitive (I am sending a sonar pulse to measure distance, see this thread for more details) and the low pass filter introduces a delay.
Can anyone think of any other way of distinguishing the signal from the noise, or should I just bin this device and get something better?
The RX module outputs rail to rail square wave "noise" at around 6kHz. When the TX sends the noise stops and an obvious TX pulse appears, it then drops back to being noisy.
I want to use this to send a pulse that triggers an interrupt on an Arduino. Obviously with the noise it is impossible to use it directly, so I created a simple RC low pass filter (4kHz cut off) which works. But there is a big BUT here, my application is time sensitive (I am sending a sonar pulse to measure distance, see this thread for more details) and the low pass filter introduces a delay.
Can anyone think of any other way of distinguishing the signal from the noise, or should I just bin this device and get something better?