What are the four basic transmitter types?

The four basic types of transmitters are typically categorized based on the modulation techniques they use for transmitting signals. The correct answer identifies Continuous Wave (CW), Frequency Modulation (FM), Amplitude Modulation (AM), and Single Sideband (SSB) as these foundational types.

Continuous Wave transmission uses a constant unmodulated signal, which can be effectively used for telegraphy or Morse code. Frequency Modulation varies the frequency of the carrier signal to encode information, providing improved noise immunity and sound quality, particularly in audio broadcasting. Amplitude Modulation involves varying the amplitude of the carrier wave, which is a simple and traditional method for radio transmissions. Single Sideband is an enhancement of amplitude modulation that eliminates redundant parts of the signal, allowing for more efficient use of bandwidth and power.

Understanding these types is crucial for electronics technicians as they form the basis for a wide range of communication systems used in various applications, from radio broadcasting to telecommunications.