Glossary
Glossary–4
TDS 340A, TDS 360 & TDS 380 User Manual
Roll
An acquisition mode useful at slow horizontal scale settings. Roll mode
allows you to view the waveform as it is acquired point-by-point. The
waveform appears to roll across the display.
Sample Acquisition Mode
The oscilloscope creates a record point by saving the first sample during
each acquisition interval. This is the default mode of the acquisition system.
Sample Interval
The time interval between successive samples in a time base. For real-time
digitizers, the sample interval is the reciprocal of the sample rate.
Sampling
The process of capturing an analog input, such as a voltage, at a discrete
point in time and holding it constant so that it can be quantized.
Selected Waveform
The waveform on which all measurements are performed and which is
affected by vertical position and scale adjustments.
Side Menu
Menu that appears to the right of the display. These selections expand on
main menu selections.
Side Menu Buttons
Bezel buttons to the right of the side menu display. They allow you to select
items in the side menu.
Signal Path Compensation (SPC)
The ability of the oscilloscope to minimize the electrical offsets in the
vertical, horizontal, and trigger amplifiers caused by ambient temperature
changes and component aging. You should run SPC at the following times:
when the ambient temperature varies more than 5_ C from the last SPC,
when using settings equal to or less than 5 mV per division, and when
performing critical measurements.
Tek Secure
This feature erases all waveform and setup memory locations (setup
memories are replaced with the factory setup). Then it checks each location
to verify erasure. This feature is useful where the oscilloscope is used to
gather security sensitive data.
Time base
The set of parameters that let you define the time and horizontal axis
attributes of a waveform record. The time base determines when and how
long to acquire record points.
Vertical Bar Cursors
The two vertical bars you position to measure the time parameter of a
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