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Z
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Zero Span
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An operating mode of the analyzer where the frequency span is zero. This corresponds to a level measurement at a fixed frequency (receiver mode) and hence a time domain display of the (filtered) input signal. Source: Willtek Communications, Inc.
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Zeros
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Values that make the transfer function zero. Factor in the numerator of the transfer function polynomial. Source: Frequency Devices, Inc.
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Zoom
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A lens system that provides for variable magnification capability while keeping the specimen in focus. Source: FRT of America
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Zulu Time
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Synonymous with Greenwich Meridian Time, a time designation used in satellite systems. Source: Wireless Week
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