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Measurements
Operating Basics
Tracking mode
cursors operate in tandem: you move
both
cursors at the
same time using the general purpose knob. To adjust the solid cursor
relative to the dashed cursor, you push the SELECT button to suspend
cursor tracking and use the general purpose knob to make the adjust-
ment. A second push toggles the cursors back to tracking.
You can read more detailed information about how to use cursors in
Cursor
Measurements,
beginning on page 3-17.
Graticule Measurements
Graticule measurements provide you with quick, visual estimates. For exam-
ple, you might look at a waveform amplitude and say “it is a little more than
100 mV.”
You can perform simple measurements by counting the number of major and
minor graticule divisions involved and multiplying by the scale factor.
For example, if you counted five major vertical graticule divisions between the
minimum and maximum values of a waveform and knew you had a scale
factor of 100 mV/division, then you could easily calculate your peak-to-peak
voltage:
5 divisions × 100 mV/division = 500 mV.
NOTE
AUX 1 and AUX 2 (TDS 524A & TDS 620A) can not be set to the
volts per division needed to match video graticules.
When you select the NTSC graticule, the volts per division of all selected
channels is set to 143 mV/div (152 mV/div for PAL) where the divisions are
those of the conventional graticule, not the divisions of the video graticules.
For NTSC, the actual grid lines represent 10 IRE, and for PAL the lines are
100 mV apart.
See
Appendix B: Algorithms
, on page A-9, for details on how the digitizing
oscilloscope calculates each automatic measurement.
See
Cursor Measurements
, on page 3-17, for more information on cursor
measurements.
See
Measurement System
, on page 3-86, for more information on automatic
measurements.
See
Tutorial Example 3: Automated Measurements
, on page 1-17, for more
information on automatic measurements.
See
Waveform Math
, on page 3-159, for using cursors to measure math
waveforms.
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Information