Filter
Top Products
Glossary
Glossary
GlossaryĆ2
Attenuation
The degree the amplitude of a signal is reduced when it passes
through an attenuating device such as a probe or attenuator. That is,
the ratio of the input measure to the output measure. For example, a
10X probe will attenuate, or reduce, the input voltage of a signal by
a factor of 10.
Automatic trigger mode
A trigger mode that causes the oscilloscope to automatically acquire
if triggerable events are not detected within a specified time period.
Autoset
A function of the oscilloscope that automatically produces a stable
waveform of usable size. Autoset sets up frontĆpanel controls based
on the characteristics of the active waveform. A successful autoset
will set the volts/div, time/div, and trigger level to produce a coherent
and stable waveform display.
Average acquisition mode
In this mode the oscilloscope acquires and displays a waveform that
is the averaged result of several acquisitions. Averaging reduces the
apparent noise. The oscilloscope acquires data as in the sample
mode and then averages it according to a specified number of
averages.
Bandwidth
The highest frequency signal the oscilloscope can acquire with no
more than 3 dB (× .707) attenuation of the original (reference) signal.
Burst width
A timing measurement of the duration of a burst.
Channel
One type of input used for signal acquisition. The TDS 644A &
TDS 640A have four channels; the TDS 620A has two.
Channel Reference Indicator
The indicator on the left side of the display that points to the position
around which the waveform contracts or expands when vertical
scale is changed. This position is ground when offset is set to 0ĂV;
otherwise, it is ground plus offset.
Coupling
The association of two or more circuits or systems in such a way
that power or information can be transferred from one to the other.
You can couple the input signal to the trigger and vertical systems
several different ways.
Cursors
Paired markers that you can use to make measurements between
two waveform locations. The oscilloscope displays the values (exĆ
pressed in volts or time) of the position of the active cursor and the
distance between the two cursors.