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15 Cards in this Set
- Front
- Back
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Occurs when a transmitted electromagnetic wave passes through the receiver antenna and induces a voltage in the antenna.
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Reception
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Is the ability to distinguish a particular station’s frequency from all other station frequencies
appearing at the antenna |
Selection
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Is the extraction of the modulation from
an rf signal |
Detection
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is the action of converting the electrical signals to sound waves that can be interpreted by
the ear. |
Reproduction
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Is a measure of receiver’s ability to reproduce
very weak signals. |
Sensitivity
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Usually, sensitivity is specified as the signal
strength in? |
microvolts necessary to cause a S/N ratio of 10 decibels, or 3.16:1
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What is the limiting
factor on the minimum usable signal that the receiver can process and still produce a usable output? |
Noise
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What is the ability of a receiver to distinguish
between a signal at the desired frequency and signals at adjacent frequencies |
Selectivity
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How do you measure selectivity?
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The steepness of the curve at the tuned frequency indicates the selectivity of the receiver.
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What is a receiver’s ability to reproduce the input
signal accurately. |
Fidelity
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Good requires a narrow bandpass.
Good requires a wider bandpass to amplify the outermost frequencies of the sidebands |
Selectivity
Fidelity |
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A loss or gain of 3 dB always
represents? |
a halving or doubling of the output power
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The primary advantages of using a transceiver
rather than a separate transmitter and receiver is? |
cost and can be tuned more easily than separate units
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Disadvantage of using a transceiver is that?
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duplex operation is not possible with most transceivers.
communication must sometimes be carried out on 2 different frequencies |
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The transmitter transfer switchboard allows the remote
control station functions and signals to be transferred selectively to how many transmitters. |
10 remote control station
functions and signals to be transferred selectively to any one of six transmitters |
