CAIE IGCSE Physics 3.3.10 Benefits of digital signalling

A mobile phone (cell phone) network uses microwaves of frequency $1.9 \times 10^{9} \mathrm{~Hz}$ to transmit and receive signals.

The speed of microwaves in air is $3.0 \times 10^{8} \mathrm{~m} / \mathrm{s}$.

All mobile phone (cell phone) networks use digital signals to communicate with the phone.

State two advantages of using digital signals rather than analogue signals.

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