Glossary
Automatic trigger mode
(PP
AUTO)
A trigger mode that causes the oscilloscope to automatically acquire or
sweep if triggerable events are not detected within a specified time
period.
Bandwidth
For an oscilloscope, bandwidth is the specified frequency range of the
vertical system wherein the vertical response is greater than or equal to
0.707
(-3
db) of the specified frequency down to DC or
0
Hz.
Bezel
The frame around the CRT that holds the implosion shield in place.
Bezel Buttons
The buttons on the bezel that are used to store waveforms or make
menu selections.
Cathode-ray tube (CRT)
An electron-beam tube in which the beam can be focused to a small
cross section on a luminescent screen and varied in both position and
intensity to produce a visible pattern.
Chop
A vertical mode of operation for dual-trace oscilloscopes in which the
display is switched or sampled between the channels at some fixed rate.
Chop is generally used at sweep speeds slower than
0.5
msldiv.
CRT
An acronym for the display device of the oscilloscope: Cathode-Ray
Tube.
Compensation
In relation to oscilloscope probes, compensation is the act of adjusting
the resistive and capacitive components of the probe to offset undesir-
able characteristics of both the probe and the input channel. Probe
compensation ensures fidelity of the input signal.
Coupling
The method of connecting the input circuit to the signal source. A cou-
pling circuit, for example, may pass only AC signals above a certain
frequency or it may attenuate the signal by some designated factor.
Cursors
Paired markers that you can use to make measurements between two
waveform locations. The oscilloscope displays the values (expressed in
volts or time) of the difference between the two cursors.
Delay measurement
The difference in time between two points using a dual time base instru-
ment.
Detent
A
mechanical setting or switch position typified by a gradual increase in
force to a position at which there is an immediate and marked reduction
in force.
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