Basic Operation Note: When you choose Normal Polarity, the trigger always occurs on negative-going sync pulses. If the video signal contains positive-going sync pulses, use the Inverted Polarity option. Pulse Width Trigger You can use it to trigger on aberrant pulses. Trigger When: The pulse width of the source must be ≥5ns so that the oscilloscope can detect the pulse. Triggers when pulse is less than width setting Triggers when pulse is greater than width setting Threshold level Triggers when pulse is not equal to width setting ±5% Triggers when pulse is equal to width setting ±5% Threshold level = Trigger Point Tolerance Tolerance ＝ , ≠:
Within a ±5% tolerance, triggers the oscilloscope when the signal pulse width is equal to DSO1000B(V) Series HandHeld Oscilloscope User Manual 27 Options Settings Comments Pulse With Pulse highlighted, the trigger occurs on pulses that meet the trigger condition (defined by the Source, When and Set Pulse Width options). Source CH1 CH2 Select the input source as the trigger signal. Polarity Positive, Negative Mode Auto Normal Single Select the type of trigger. The Normal mode is best for most pulse width trigger applications. Coupling AC DC Noise Reject HF Reject LF Reject Select the components of the trigger signal applied to the trigger circuit. When = ≠ Select the trigger condition.
Pulse Width 20ns to 10.0sec With Set Pulse Width highlighted, set the pulse width. 50% Th T vel