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Time Modulation versus Pulse Width Modulation of a RF (400kHZ) Signal

Time Modulation versus Pulse Width Modulation of a RF (400kHZ) Signal

(OP)
Can anyone share a simple explanation contrasting the two types of RF modulation, or are they the same. Thanks in advance!

RE: Time Modulation versus Pulse Width Modulation of a RF (400kHZ) Signal

'X' Modulation means that 'X' is changing. Amplitude, Frequency, Phase, Pulse Width, etc. Some parameter of the signal. I'm not sure how you'd change Time itself. smile

There's a Pulse Position Modulation, which is changing the relative timing of a pulse, typically relative to a reference pulse. A bit like ignition advance relative to TDC in a spark ignition engine. Rarely used in radio communications, might be a bit more common in radio navigation.

You can easily Google Pulse Width Modulation or PWM. I assume Wiki would have a good explanation.

Where did 'Time Modulation' come from?

PS. kHz (lowercase z) smile

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