Question
Which of the following types of signals can be relayed through a linear transponder?
Answer Options
- A) FM and CW
- B) SSB and SSTV
- C) PSK and packet
- D) All these choices are correct
Correct Answer: D
Explanation
A linear transponder operates like a wideband repeater, maintaining the amplitude and frequency relationships of the signals it receives before retransmitting them. This linearity is crucial because it allows the satellite to handle multiple signals simultaneously across its passband without causing intermodulation distortion (within power limits).
Because a linear transponder preserves the amplitude and frequency characteristics of the original signal, it can accurately relay a variety of modulation types, including continuous wave (CW), single-sideband (SSB), slow-scan television (SSTV), frequency modulation (FM), and various digital modes like PSK and packet. Therefore, all these choices are correct, as long as the operator’s transmission adheres to the appropriate power and bandwidth rules for the transponder.
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