TDS 420A, TDS 430A, TDS 460A & TDS 510A User Manual
Glossary–1
Glossary
Accuracy
The closeness of the indicated value to the true value.
Acquisition
The process of sampling signals from input channels, digitizing the samples
into data points, and assembling the data points into a waveform record. The
waveform record is stored in memory. The trigger marks time zero in
that process.
Acquisition interval
The time duration of the waveform record divided by the record length. The
digitizing oscilloscope displays one data point for every acquisition interval.
Active cursor
The cursor that moves when you turn the general purpose knob. It is
represented in the display by a solid line. The @ readout on the display
shows the absolute value of the active cursor.
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.
Average acquisition mode
In this mode the oscilloscope acquires and displays a waveform that is the
averaged result of several acquisitions. That reduces the apparent noise. The
oscilloscope acquires data as in 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 (× 0.707) attenuation of the original (reference) signal.
Delay time
The time between the trigger event and the acquisition of data.
Digitizing
The process of converting a continuous analog signal, such as a waveform,
to a set of discrete numbers representing the amplitude of the signal at
specific points in time. Digitizing is composed of two steps: sampling
and quantizing.
To Next Page
Loading...
Need help?
General
