Tektronix TDS 820, Manual

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Product Description
Appendix B: Specification
TDS 820 Performance Verification
2Ć5
Autoset
Autoset automatically sets up the digitizing oscilloscope for a viewable display
based on the input signal.
Once you set up the digitizing oscilloscope to make your measurements, the
features cursor and measure can help you quickly make those measure-
ments.
Cursor
Three 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. Paired cursors measure both vertical param-
eters and horizontal parameters simultaneously.
Both V Bar and H Bar cursors can also be used to make absolute measure-
ments — 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
any channel’s ground reference level; 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 seconds or Hertz (for 1/time).
Measure
Measure can automatically extract parameters from the signal input to the
digitizing oscilloscope. You may display any four out of the more than 20
available parameters to the screen. The displayed parameters are extracted
continuously and the results updated on-screen as the digitizing oscilloscope
continues to acquire waveforms.
You can also pop up a display (a snapshot) of almost all the automated
measurements. Snapshot can execute all the single waveform measurements
available on the selected waveform once and display the results.
Digital Signal Processing (DSP)
An important component of the multiprocessor architecture of this digitizing
oscilloscope is Tektronix’s proprietary digital signal processor, the DSP. This
dedicated processor supports advanced analysis of your waveforms when
doing such compute-intensive tasks as interpolation, waveform math, and
signal averaging. It also teams with a custom display system to deliver spe-
cialized display modes (See
Display, later in this description.)
Measurement
Assistance