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20 Cards in this Set
- Front
- Back
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simplex communication
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type of communication
one way, each way only transmits and receives on the same frequency |
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duplex communication / physician interrupt
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two-way communication; ie. telephone, cell phone
two different radio frequencies can go on at the same time |
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multiplex communication
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similar to duplex communication but it adds an ECG transmission as well. Three streams going on between 2 radios at the same time.
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modulator
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circuit that takes a low frequency and converts it to a higher audible frequency
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de-modulator
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circuit that takes a higher frequency and makes it a lower frequency
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# volts in a typical household battery
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1.5V
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direct current
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Type of current that is continuous. The voltage never goes below zero.
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voltage
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the "push" of the electrons that get electricity from point A to point B
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Minimum voltage required to cause electrocution
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80V
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Voltage is a standard wall outlet
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110V
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Alternating current
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type of current that has the voltage rising and falling above and below a baseline
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Which type of voltage is more dangerous? AC or DC?
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AC
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analog signal
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type of signal that changes gradually over time
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digital signal
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type of signal that is comprised of "ons" and "offs" that a represented by voltage.
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Sine wave
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wave that is up and down, serpentine appearance
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Frequency
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the number of times a sine wave changes shape within a certain period of time
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Hz
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hertz
cycles per second |
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Loose range of Hz that a human might be able to hear
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20 Hz (less is considered sub-audible) - 20,000 Hz (more is considered ultra-sound)
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The more ____ the slope of a wave is, the lower the frequency
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horizontal
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The more _____ the slope of a wave is, the higher the frequency
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vertical
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