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• REF: press this key to enable the reference waveform function. You
can compare the waveform actually measured with the reference
waveform.
• Decode1, Decode2: press any key to open the corresponding decod-
ing function menu.
HORIZONTAL
• MENU: press this key to open the horizontal control menu. You can turn
on or off the delayed sweep, switch between different horizontal time
base modes, switch between “Coarse” and “Fine” adjustments of the
horizontal time base as well as modify the horizontal reference setting.
• HORIZONTAL SCALE: horizontal scale knob. Turn the knob to modify
the horizontal time base. During the modication, the waveforms dis-
played are expanded or compressed horizontally; the horizontal time
base message at the upper-left side of the screen changes accord-
ingly. Pressing down the knob can quickly turn on or off the delayed
sweep. When delayed sweep is turned on, turning the knob can modi-
fy the delayed sweep time base. During the modication, the delayed
sweep waveform is expanded or compressed horizontally; the de-
layed sweep time base message at the middle of the screen changes
accordingly.
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