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| 1.
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Which of the following circuits is often used for FM detection? |
| | A) | ratio detector |
| | B) | diode detector |
| | C) | product detector |
| | D) | all of the above |
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| 2.
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What is the expected output signal from the circuit shown below?
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| | A) | FSK |
| | B) | FM |
| | C) | AM |
| | D) | None of these. |
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| 3.
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Determine the IF if the desired station is 14 MHz and the local oscillator produces 23 MHz. |
| | A) | 42 MHz |
| | B) | 10.7 MHz |
| | C) | 9 MHz |
| | D) | 455 kHz |
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| 4.
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Determine the total bandwidth of an AM signal when the carrier frequency is 10 MHz and the intelligence signal is 5 kHz: |
| | A) | 10.005 MHz |
| | B) | 10 MHz |
| | C) | 10 kHz |
| | D) | 5 kHz |
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| 5.
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Identify the circuit shown below:
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| | A) | pulse width modulator |
| | B) | phase locked loop |
| | C) | frequency modulator |
| | D) | balanced modulator |
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| 6.
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The process of adding an intelligence signal to a radio frequency carrier is called: |
| | A) | modulation |
| | B) | detection |
| | C) | integration |
| | D) | none of the above |
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| 7.
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The process of recovering the intelligence signal from an AM signal is called: |
| | A) | modulation |
| | B) | detection |
| | C) | integration |
| | D) | none of the above |
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| 8.
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Radio receivers achieve selectivity by using: |
| | A) | tuned circuits |
| | B) | balanced modulators |
| | C) | frequency mixers |
| | D) | diode detectors |
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| 9.
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The defining feature of superheterodyne receivers is their: |
| | A) | exclusive use with TV signals |
| | B) | exclusive use with SSB signals |
| | C) | exclusive use with FM signals |
| | D) | conversion of the incoming signal to an intermediate frequency |
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| 10.
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Find the image frequency when the station frequency is 99.7 MHz and the IF is 10.7 MHz. |
| | A) | 121.1 MHz |
| | B) | 89.0 MHz |
| | C) | 21.4 MHz |
| | D) | 9.7 MHz |
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