Tektronix WCA200A, User Manual

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Glossary
WCA230A & WCA280A User Manual
Glossary- 3
Display Reference Level
A designated vertical position representing a specified input level. The level
may be expressed in dBm, volts, or any other units.
Distortion
Degradation of a signal, often a result of nonlinear operations, resulting in
unwanted signal components. Harmonic and intermodulation distortion are
common types.
Dynamic Range
The maximum ratio of the levels of two signals simultaneously present at the
input which can be measured to a specified accuracy.
Export
Save data to a file in a format other than application-native.
FFT Time
The length of time covered by one frame, whether or not an RBW filter is
applied to the FFT. This was previously called a “multi-frame”.
Filter
A circuit which separates electrical signals or signal components based on
their frequencies.
Frame
A series of time-contiguous samples, long enough in duration and at a
sufficient sample rate to produce a spectrum view of a specified span and
RBW.
Frequency
The rate at which a signal oscillates, or changes polarity, expressed as hertz
or number of cycles per second.
Frequency Band
The continuous range of frequencies extending between two limiting
frequencies, expressed in hertz.
Frequency Domain Representation
The portrayal of a signal in the frequency domain; representing a signal by
displaying its sine wave components; the signal spectrum.
Frequency Drift
Gradual shift or change in displayed frequency over the specified time due to
internal changes in the spectrum analyzer, where other conditions remain
constant. Expressed in hertz per second.
Frequency Modulation (FM)
The process, or result of a process, in which the frequency of an electrical
signal (the carrier) is varied in accordance with some characteristic of a
second electrical signal (the modulating signal or modulation).