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CBSE Class 12-science Answered

plz answer
Asked by | 20 Jan, 2009, 08:08: PM
answered-by-expert Expert Answer

We could say a "signal" could be digital. But to move that signal around via an analog medium, such as a radio wave or a piece of wire, you would have to encode it via an analog means, such as modulation. It is true that digital signals travelling through the air must do it by piggybacking on something analog. So in a modem digital signal is converted into a anlog signal to transmit it.

Answered by | 22 Jan, 2009, 11:49: AM

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