Velleman APS230, Руководство пользователя

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A ps 2 3 0 A D VA N CE D Per s o n al S c o pe TM
Trigger modes
Trigger modes :
Pressing the trigger button repeatedly will
cause the trigger mode to switch between:
”norm” = Normal trigger: a triggering (or ma-
nual trigger) must occur before the sample
memory is filled. Use this mode when you
want to start displaying the signal when it
reaches a preset threshold value.
(Fig 54)
“run” = Auto-trigger mode, the scope automa-
tically triggers if no triggering occurs for a fixed
period of time. This position is used most
frequently and should always be used for
measuring DC voltages.
(Fig 55)
“once” = Sampling starts after triggering, comple-
tion will be shown by means of a check mark (1).
Triggering can be restarted by pressing the
'manual/restart' button. Use this mode to detect e.g.
a short glitch.
(Fig 56)
“roll” = Roll-mode is available for timebases
of 10s/div or slower. Sampling is continuous
and the screen starts rolling as soon as it is
full. Use this position for “recording” slow
moving dc signals.
(Fig 57)
Fig 54 Fig 55
Fig 56 Fig 57
Notes:
•
Pressing the ‘manual/restart’ key generates a
manual triggering (except in ‘HOLD’-mode).
•
Changing the trigger mode immediately
switches the autorange mode off.
•
At time base of 0,1s/div and slower, the
input coupling is DC-only
1