Fill in the Blanks


1		Known in earlier years as interference, now EMI is defined as any interference to a communication device by any other electronic device.


2		A poor electrical ground often causes interference.


3		Shielding is the process of surrounding circuits or sensitive receiving circuits with a metal enclosure to prevent the radiation or pickup of signals.


4		allow desired signals to pass and undesired signals to be significantly reduced in level.


5		Radiation is measured with a(n) strength meter in units of microvolts per meter.


6		A(n) voltmeter is a special piece of test equipment designed to measure the voltage of high-frequency signals.


7		A(n) generator is a device that produces an output signal of a specific shape at a specific frequency and, in communication applications, usually with some form of modulation.


8		A sweep generator is a signal generator whose output frequency can be varied over some specific range.


9		Prescaling is a(n) technique that involves the division of the input frequency by a factor that puts the resulting signal into the normal range of a frequency counter.


10		A(n) analyzer is a test instrument designed to analyze linear circuits, especially RF circuits.


11		If AM is being used in a transmitter, of modulation should be measured.


12		A common problem in transmitters is the radiation of undesirable harmonics or signals.


13		The primary tests for receivers involve sensitivity and level.


14		An impedance-matching pad is generally a resistive network that provides the correct match between the receiver input and a signal generator.


15		A common method of analyzing the quality of data transmitted on a cable is to display what is known as the eye diagram on an oscilloscope.

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