Glossary Of Terms; Selecting Ac-Coupling - Extech Instruments MS420 User Manual

G T
LOSSARY OF ERMS
Collecting mode: The oscilloscope converts the collected analog data into
•
digital data for each of the following three modes: Sampling, Peak Detect, and
Averaging.
• Sampling: The waveform sampling resolution in seconds. Waveforms
that change faster than the sample duration will not be accurately
captured.
Peak value detection: In peak detect mode the meter can capture very
•
narrow pulses down to 50ns
Averaging values: The oscilloscope averages a selectable number of
•
measurements. Random noise can be minimized in this mode.
Duration time: A waveform can be held as a new waveform is displayed. The
•
amount of time the previous waveform is displayed is the 'duration time'.
Roll scan: The oscilloscope updates the waveform sampling points by
•
scrolling the screen from left to right (applicable only to primary time base
settings above 50ms).
S AC-
ELECTING COUPLING
After a reset, the Oscilloscope is dc-coupled so that ac and dc voltages
appear on the screen. Use ac-coupling to observe a small ac signal that rides
on a dc signal. To select ac-coupling, perform the following steps:
Press the MENU key; the function menu will appear at the right side of the
1.
screen.
Press MENU ▲ or MENU ▼ to select the CH1 Setting. Four (4) selectable
2.
options appear at the bottom of the screen.
3. Press the F1 key and select AC. The AC coupling icon will appear on the
screen.
Refer to Figure 16.
24 MS420-en-US_V6.0 2/23