GW Instek GDS-122 User Manual - Manual (Page 18)

Using the Oscilloscope
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Selecting the acquisition mode
Overview The acquisition mode specifies how the incoming
analog signal is digitally sampled by the GDS‐122.
Sample The waveform data is sampled at an
equal time interval. The sample
mode accurately reconstructs the
waveform, but cannot respond to
rapid changes and sudden peaks.
Peak detect The maximum and minimum data
in the sampling interval are picked
up. The peak detect mode captures
rapid changes and sudden peaks,
but the waveform becomes noisy.
Average Multiple samples are averaged
together. The average mode reduces
the noise level, but the waveform
must be repetitive. The number of
averaging are 4, 16, 64, and 128.
Panel operations 1. Press the MENU key and
select the ACQU MODE
menu using the Up/Down
keys.
MENU ACQU MODE
2. Select the acquisi‐
tion mode from F1
(Sample) to F3
(Average).
Sample
Peak
Detect
Average
F1 F2 F3
For the Average mode, also
press F4 (Averages) repeatedly
to select the number of
averaging: 4, 16, 64, or 128. 16
Averages
F4
Example Sample Peak detect Average (16)
GDS-122 User Manual
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Configuring display settings
Overview The display settings configure how the waveforms
are drawn in the display.
vector drawing The vector drawing mode shows
the waveform as a smooth line,
connecting each data point.
dot drawing The dot drawing mode shows the
waveform as a collection of
independent data points.
persistence The persistence setting sets how
long the old waveforms remain in
the display, useful for observing
the waveform variations.
Panel operations 1. Press the MENU key and use the Up/Down
keys to select the DISP SET menu.
2. Press F1 (Type) or F2 (Persist) repeatedly to
select vector drawing, dot drawing, and
persistence time.
MENU DISP SET
Vectors
Type
Dots
F1
OFF
Persist
Infinite
1/2/5 sec
F2
Vector/dot
drawing example
Vector Dot
Persistence
example
Persistence off Persistence infinite