Question
What is one way to produce a single-sideband phone signal?
Answer Options
- A) Use a balanced modulator followed by a filter
- B) Use a reactance modulator followed by a mixer
- C) Use a loop modulator followed by a mixer
- D) Use a product detector with a DSB signal
Correct Answer: A
Explanation
Single-sideband (SSB) is a highly efficient voice mode created by suppressing the carrier and one of the two sidebands found in a conventional Amplitude Modulation (\text{AM}) signal. The process begins with generating a Double Sideband Suppressed Carrier (\text{DSB-SC}) signal.
One common and classic way to produce an \text{SSB} signal is to use a balanced modulator followed by a filter. The balanced modulator generates the \text{DSB-SC} signal (by eliminating the carrier). A very sharp crystal or mechanical filter then removes one of the two sidebands, leaving only the desired single-sideband signal for subsequent amplification and mixing to the final output frequency.
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