signal wave form
Quick Summary
A waveform is a graphic representation of a wave's shape, indicating characteristics like frequency and amplitude. In electronics and telecommunications, waveforms are crucial for transmitting information.1
Modulation is the process of assigning a suitable waveform to an information-bearing signal so it can travel through a transmission medium. This involves varying a characteristic of a carrier wave according to an information signal. This is done for several reasons:2
* To "frequency translate" signals into a range permitted by the channel.2
* To allow multiple users to share a communications channel by assigning each user a specific frequency.2
* To enable the use of smaller antennas by translating signals to higher frequencies.2
Common modulation techniques for analog signals include amplitude modulation (varying amplitude) and frequency modulation (varying frequency). Electronic test instruments called signal generators produce calibrated signals with adjustable waveforms for testing and development.23
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