A&D Series 57ZZ Manual do Utilizador descarregar pdf (Página 32)

Waveform Measurements with

Digitizing Oscilloscopes

Digitizing oscilloscopes have functions that make

waveform measurements easier. Modern DSOs and

DPOs have front-panel buttons or screen-based

menus from which you can select fully automated

measurements. These include amplitude, period,

rise/fall time, and much more. Many digitizing

instruments also provide mean and RMS calcula-

tions, duty cycle, and other math operations.

Automated measurements appear as on-screen

alphanumeric readouts. Typically these readings are

more accurate than it’s possible to obtain with direct

graticule interpretation.

Following is a list of the fully automated waveform

measurements available on the TDS 500D/700D

Series Digital Phosphor Oscilloscopes.

Period Duty cycle + High

Frequency Duty cycle – Low

Width + Delay Minimum

Width – Phase Maximum

Rise time Burst width Overshoot +

Fall time Peak-to-peak Overshoot –

Amplitude Mean RMS

Extinction ratio Cycle mean Cycle RMS

Mean optical power Cycle area

What’s Next?

This section has covered basic measurement tech-

niques. Other measurement techniques involve

setting up the oscilloscope to test electrical compo-

nents on an assembly line, subtracting noise from a

signal, capturing elusive transient signals, and many

others that would take too much room to list. The

measurement techniques you will use depend on

your application, but you have learned enough to get

started. Practice using your oscilloscope and read

more about it. Soon its operation will be second

nature to you.

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A&D Series 57ZZ Manual do Utilizador Página 32