Tektronix TDS5054, Руководство пользователя

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Glossary
TDS5000 Series User Manual
Glossary- 5
Hi Res acquisition mode
An acquisition mode in which the oscilloscope averages all samples taken
during an acquisition interval to create a record point. That average results in
a higher-resolution, lower-bandwidth waveform. That mode only works with
real-time, non-interpolated sampling.
High
The value used as 100% in automated measurements (whenever High Ref,
Mid Ref, and Low Ref values are needed as in fall time and rise time
measurements). May be calculated using either the min/max or the histogram
method. With the min/max method (most useful for general waveforms), it is
the maximum value found. With the histogram method (most useful for
pulses), it refers to the most common value found above the mid point.
Holdoff, trigger
A specified amount of time after a trigger signal that elapses before the
trigger circuit will accept another trigger signal. Trigger holdoff helps ensure
a stable display.
Horizontal bar cursors
The two horizontal bars that you position to measure the voltage parameters
of a waveform. The oscilloscope displays the value of the active (moveable)
cursor with respect to ground and the voltage value between the bars.
Horizontal reference point
The point about which the trace is expanded or contracted when horizontal
size adjustments are made. The horizontal reference point remains anchored
as the rest of the trace grows or shrinks around it.
Initialize
Setting the oscilloscope to a completely known, default condition.
Intensity
Display brightness.
Interleaving
A method by which these oscilloscopes attain higher digitizing speeds. The
oscilloscope applies the digitizing resources of unused channels (that is,
channels that are turned off) to sample those that are in use (turned on).
Table 3--3 on page 3--35 lists acquisition rates vs. number of channels that
are on.
Interpolation
The way the oscilloscope calculates values for record points when the
oscilloscope cannot acquire all the points for a complete record with a single
trigger event. That condition occurs when the oscilloscope is limited to real
time sampling and the time base is set to a value that exceeds the effective
sample rate of the oscilloscope. The oscilloscope has two interpolation
options:
linear or sin(x)/x interpolation .