1. Analog to Analog Modulation

2. Analog modulation techniques
Analog information/analog signal
Example : radio
Analog-to-analog modulations
Amplitude modulation (AM)
Frequency modulation (FM)
Phase modulation (PM)

4. AM The amplitude is varied The phase and frequency remain unchanged
The bandwidth
Is usually 5KHz
AM stations need minimum BW of 10 KHz
AM stations are allowed carrier frequencies between 530 and 1700 KHz

5. Amplitude Modulation

6. AM Bandwidth

7. AM Band Allocation

8. FM
The frequency is modulated to follow the changing of voltage level (amplitude) of the signal
The peak amplitude and phase do not change
The BW of FM radio
88 – 108 MHz

9. Frequency Modulation

10. FM Bandwidth
My Notes for DataCom _

11. FM Band Allocation

12. Phase modulation