I do not have too much knowledge background of RF knowledge.
I am using Arduino board to record and interpret RF analog signals. There is an 10-bit analog-to-digital converter.
I saw many people use "threshold voltage" to describe the levels of analog signals (convert to digital). In the case of Arduino's 10-bit ADC, it is level 1-1024.
So what this "threshold voltage" actually refer to (e.g. strength of analog signal or something else)?
Continue Q1. If the threshold is low than certain value (e.g. 80), it is defined as LOW signal. Similarly, HIGH signal for threshold higher than 100.
For example, remote control signal (e.g. air-condition) consist of a series of (LOW, HIGH) pairs. This is what I saw from some Arduino projects. Is it a common way to define LOW and HIGH signal?
What means the length of analog signal? Time?
If you convert digital signal back to analog signal, and send them through a transmitter. You need to set certain delay between each (LOW, HIGH) pair. Why there is such delay?