ANALOGUE DATA, ANALOGUE SIGNALS

For the transmission of analog signals by analog modulation there are 2 reasons:

1.  Unguided media needs a higher frequency for more effective transmission.
2. Modulation allows frequency division multiplexing.

The analog data modulation techniques are:

1. Amplitude Modulation (AM)
2. Frequency Modulation (FM)
3. Phase Modulation (PM)