Velleman HPS10 User Manual - page 20
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*The pictures may differ depending on the type of PersonalScope
20
G
Notes:
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Pressing the Trigger key generates a manual triggering (except in ‘HOLD’-mode)
•
Changing the trigger mode switches the auto range mode immediately off.
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At time base of 1s/div and slower, the input coupling is DC-only
•
Normal triggering is the only triggermode for timebases of 1µs/div or faster (2µs/div for HPS10)
because of the oversampling method.
•
Keep pressing this key during “hold” mode stores the current screen into memory.
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When no markers are displayed, the cursorkeys are set for changing the timebase or input sensitivity
when no keys are pressed during 10 seconds.
Trigger slope
Press the right cursor key to set triggering at the rising or falling edge of the input signal.
1. 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 41)
2. 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 42)
G
Notes:
Between triggering and the first sample-acquisition there is a fixed hardware-determined delay. Because
of this delay, the sampled signal can show a different slope at fast timebases.
When no markers are displayed, the cursorkeys are set for changing the timebase or input sensitivity
when no keys are pressed during 10 seconds.
Changing the trigger level
Press the ‘Trigger’-key to set the cursorkeys action into ‘trigger’ mode.
Press up/down cursor keys to shift the y-position of the signal
Or use the up/down cursorkeys to shift the vertical trigger position (1, 2). (Only for HPS40)
G
Notes:
•
When no markers are displayed, the cursorkeys are set for changing the timebase or input sensitivity
when no keys are pressed during 10 seconds.
Fig 41
1
Fig 42
2