Product Description
TDS 420A, TDS 430A & TDS 460A Service Manual
1-5
On -Board User Assistance
Two features that help you set up this digitizing oscilloscope to make your
measurements are help and autoset.
Help displays operational information about any front-panel control. When help
mode is in effect, manipulating any front-panel control causes the digitizing
oscilloscope to display information about that control. When help is first
invoked, an introduction to help is displayed on screen.
Autoset automatically sets up the digitizing oscilloscope for a viewable display
based on the input signal.
Measurement Assistance
Once you have set up to make your measurements, the features cursor and
measure can help you quickly make those measurements.
Two types of cursors are provided for making parametric measurements on the
displayed waveforms. Voltage can be measured between the positions of H Bar
(horizontal) cursors, and time can be measured between V Bar (vertical) cursors.
These are delta measurements; that is, measurements based on the difference
between two cursors.
You can use both V B ar and H Bar cursors to make absolute measurements—
measurements relative to a defined level or event. In the case of the H Bars,
either cursor can be selected to read out its voltage with respect to the ground
reference level of any channel; in the case of the V Bars, its time with respect to
the trigger point (event) of the acquisition.
For time measurements, units can be either base (seconds or clocks) or inverse
base (Hertz or 1/clocks).
Measure can automatically extract parameters from the signal input to the
digitizing oscilloscope. Any four out of the more than 20 parameters available
can be displayed on the screen. The displayed parameters are extracted continu-
ously and the results updated on screen as the digitizing oscilloscope continues
to acquire waveforms.
Help
Autoset
Cursor
Measure
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