3 ms·
Couldn't you send an amplitude modulated signal down a DC line by modulating the voltage but keeping that voltage always above zero? If the current never actua
by Eelongate 5y ago
Couldn't you send an amplitude modulated signal down a DC line by modulating the voltage but keeping that voltage always above zero? If the current never actually reverses, it wouldn't be AC as I understand it. It would be PDC, pulsed direct current.
- goodpoint 5y ago> modulating the voltage but keeping that voltage always above zero In signal transmission theory people almost always think in terms of frequency ranges. Any DC component is simply a frequency set to 0 - that can be ignored. Similar to the earth magnetic field when talking about radio transmission in air.
- Eelongate 5y agoSure, but it's still not AC. It's VDC or PDC, not AC. It's not AC if the Current isn't Alternating.