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13 Cards in this Set
- Front
- Back
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What are the advantages of FM over AM?
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-Greater noise suppression
-High-fidelity(stereo) reception -Less interference between broadcast stations. -Reduced transmitter power to cover assigned area. |
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What are the disadvantages of FM?
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-Takes up a lot more bandwidth.
-Range for NBFM/VHF -Weather Problems -Limiter Circuitry can cause a phase shift. When blocking noise spikes. |
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What is the formula for maximum antenna distance?
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D=1.23*Square root(2H+2H)
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What are the FM sidebands that contain the majority of the power called?
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significant side bands
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Where is the intelligence located in FM?
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In the Frequency.
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What circuitry removes noise spikes?
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Limiter
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A modulating signal of 3kHz will produce sidebands at intervals of__________ to infinity.
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3kHz
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The phenomena of an FM reciever processing two signals of equal strength at the same frequency causing it to switch back and forth is called what?
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Capture Effect
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T/F
FM recievers don't need a RF amplifier. |
F
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The FM discriminator is equivalent to what in an AM reciever?
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Detector
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The Pre-emphasis/ De-emphasis process effects what frequencies? (High or Low)
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High (starts at about 500Hz)
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Pre-Emphasis happens before_________, De-emphasis happens after____________.
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Modulation/Demodulation
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_________ is, two signal that are close enough to produce the same IF.
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Image Frequency
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