CEM DT-9989, User Manual, Page: 44 / 68

2 5 Fast/slow display
2 6 Vertical System
2 7 Horizontal system
2 8 Trigger System
-
-
When the measured signal is unstable, displayed waveform presents jumping; long-term
observation may cause eye fatigue. Digital Oscilloscope offers the selection of fast/slow
display function, press F3 (F/S), fast display can be switched to slow display, which can
efficiently improve eye fatigue. “Slow” turns to yellow at status bar of interface, means
activated.
If press again, switch back to fast display, “Fast” turns to yellow, means fast display
activated.
Default fast display after start up.
Press “ ”to adjust vertical system, default attenuation ratio, that is, preselected frequency
(xxV/div) of adjusting input end after start up presents the status of last shutdown.
While selecting DC coupling, as direct current exist in waveform, it may turn to one side,
press “MODE”, switch function of “ ” to adjust waveform up and down position, make the
waveform back to middle position by pressing “ ”, for convenient observation and
measurement.
Press “ ” to adjust horizontal system, default adjust of sample rate after startup, that is,
xxKSa/S.
Press “MODE” then “ ” if user wants to change the trigger horizontal position in memory
(trigger displacement).
Trigger function confirms the time of collecting data and displaying waveform for the
oscilloscope.After correctly set up the trigger, the oscilloscope can switch unstable displayed
result to meaningful waveform.
•
•
•
•
•
•
•
-
-
44
Oscilloscope Section