Level Field - HP 1660CS-Series User Manual

The Scope Trigger Menu

Level field

Level field
The Level field shows the voltage value of the trigger level. When the voltage
value on the trigger source input waveform equals the trigger level voltage
value, the oscilloscope triggers.
When you change the trigger level voltage value, the waveform moves
horizontally on the display to maintain the trigger point. (That is, the point
where the waveform voltage value crosses the trigger point voltage value.)
The following illustration shows this.
If the trigger point voltage level is set above or below the waveform
amplitude, the trigger point cannot be found. If Auto-Trig is set to On, this
causes the waveform display to become unsynchronized and to "float" on the
display. If Auto-Trig is set to Off, the message "Waiting for trigger" is
displayed.
The trigger point voltage can be set either by the autoscale function or by a
voltage value set into the Level field. It can be set to any voltage value
contained within the waveform display window, in increments of 0.05% of full
scale vertical voltage range (V/Div x 4 divisions = full scale). For example, if
full scale voltage range were 400 mV, trigger level would be set in increments
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