Velleman-projects EDU09 Assembly instructions Uživatelský manuál stáhnout pdf (Strana 14)

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Oscilloscope terminology

OSCILLOSCOPE TERMINOLOGY

1. Volts/div: Determines how many volts the signal at the input must swing for the trace to move one division.

2. Time/div: Determines the time the trace needs to scan from the the left hand side to the right hand side of a division.

3. Division: Imaginary or visible grid on the oscilloscope screen. It helps estimating signal amplitude and period.

4. Period (T): Duration of one cycle of the AC waveform (= 1/f)

5. Frequency (f): The number cycles of the AC waveform per sec.

6. Trace: ‘line’ that is drawn on the screen, which represents the signal

at the input.

7. Amplitude: How far does the signal ‘swing’in a direction. Expressed

in mV or V. For repetitive signals: Vpeak.

8. Peak-to-peak: Difference between most positive and most negative

swing of the signal. 2xVpeak for sinusoidal signals.

AC coupling: The oscilloscope only displays the AC component of a signal, any DC level is ignored.

Analog: Analogscopesusetheincomingsignaltodeectanelectronbeam,whichscansfromlefttorightonthescreen.Theelectronbeam

leaves an image on the screen which represents the signal you’ve applied. Analog signals are continuously variable. See also ‘Digital’.

‘Auto-setup’ mode: The oscilloscope automatically selects a setting for Volts/div and Time/div in such a way that one or more periods

of signal are displayed correctly.

Clipping: When the ‘top’ or ‘bottom’ or both extremes of a signal are cut-off (‘clipped’), e.g. because the

signalcannotswinganyfurtherduetopowersupplylimitations.Anundesiredpropertyofampliersthat

are driven beyond their specs.

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Velleman-projects EDU09 Assembly instructions Uživatelský manuál Strana 14