In analog data transmission, frequencies of 0 to 300 Hz and 3300 to 4000 Hz are reserved as ________, used to ensure that the data transmission will not interfere with other signals
Fill in the blank(s) with correct word
guardbands
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Two biological hazards are ______________ and _____________.
Fill in the blank(s) with the appropriate word(s).
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The ____ starts at the surface and extends upward to an average of about 4 miles over the poles and ranges up to 17 miles above sea level near the equator
A) exosphere B) thermosphere C) troposphere D) stratosphere
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In the simplest sense, a zener diode is really a:
A) current regulator. B) reference voltage. C) voltage regulator. D) reference current.
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Laser cans are used to __________________.