Tektronix TBS1000C Series

7. Push -More- Page 1/2 side-menu button.
8. Push the Trigger When side-menu button and use the Multipurpose knob to
select and click the pulse width condition on which to trigger. Then use the
Multipurpose knob to enter the pulse width time parameter.
Trigger setup
60 TBS1000C Series Oscilloscopes User Manual