Basic Operation Overtime Trigger: In Pulse Width trigger, you may sometimes be puzzled with the long time for trigger, as you do not need a complete pulse width to trigger the oscilloscope, but want the trigger occurs just upon the overtime point. This is called Overtime Trigger. DSO1000B(V) Series HandHeld Oscilloscope User Manual 29 Noise Reject HF Reject LF Reject Type Video Polarity Normal Inverted Standard NTSC PAL/SECAM Sync All Lines Line Number Odd Field Even Field All Fields Choose a proper video sync. When selecting Line Number for the Sync option, you may use the User Select it to specify a line number. Type Pulse Polarity Positive Negative When = ≠ Select the trigger condition.
Set PW Pulse Width Set the pulse width. Coupling AC DC Noise Reject HF Reject LF Reject Selects the components of the trigger signal applied to the trigger circuitry. Type O.T. Polarity positive Negative Overtime 20ns to 10.0sec Set the time span. Coupling AC DC Noise Reject HF Reject LF Reject Selects the components of the trigger signal applied to the trigger circuitry. Options Settings Comments Type O.T. Source CH1 CH2 Select the trigger source. Polarity Positive Negative Select to trigger on positive or negative pulses.