Publicité
Trigger setup
THE TRIGGER SETUP
Press the 'MODE' button repeatedly until the 'trigger' setting
appear.
•
Use the 'UP' cursorkey to change the trigger-mode (norm,
run or roll).
Trigger modes :
"norm"= Normal trigger: A triggering (or manual 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 16)
"run"= Auto-trigger mode, the scope automatically 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 in particular. (Fig 17)
"roll"= Roll-mode is available for timebases of 1s/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 18)
Notes:
•
At time base of 1s/div and slower, the input coupling is DC-only
•
Normal triggering is the only triggermode for timebases of 2µs/div
or faster because of the oversampling method.
16
All manuals and user guides at all-guides.com
Trigger slope
Press the 'DOWN' cursorkey to set triggering at the rising or
falling edge of the input signal.
Triggering on the rising slope of the signal :
The screen will only display the signal when a positive slope is
"detected", viz. the signal has to rise in vertical direction in
order to trigger. (Fig 14)
Triggering on the falling slope of the signal:
The screen will only display the signal when a negative slope is
"detected", viz. the signal has to drop in vertical direction in
order to trigger. (Fig 15)
Notes:
Between triggering and the first sample-aquisition there is a
fixed hardware-determined delay. Because of this delay, the
sampled signal can show a different slope at fast timebases.
VPS10 Panel Scope
TM
Publicité
