Transmission and Reception of Radio Waves

transmitter, receiver

For the propagation and interception of these, a _______ and _______ are employed.

Diffraction

Radio waves bend around buildings and hills by _______.

Radio Waves

Acts as a carrier of information bearing signals.

Modulation

Where the information may be encoded directly on the wave by periodically interrupting its transmission(dot-and-dash telegraphy) or impressed on it.

Sidebands

Frequencies added to the carrier wave.

True

[True/False] The actual information in a modulated signal in contained in the sidebands rather than in the carrier wave itself.

Amplitude Modulation

Older method of broadcasting.

Amplitude Modulation

AM

Frequency Modulation

FM

Frequency Modulation

Minimizes noise and provides greater fidelity.

False

[True/False] Both AM & FM are NOT analog transmission systems

Digital Radio

Signals propagate as discreet voltage pulses (as patterns of numbers).

Digital Radio Broadcast

Offers compact disk-quality reception and reproduction.