Tektronix 6 series, Printable Help

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Mode & Holdoff panel (Bus Trigger configuration panel) fields and controls.
Field or control Description
Trigger Mode The trigger mode determines how the instrument behaves in the absence or presence of a
trigger event:
Auto trigger mode enables the instrument to acquire and display a waveform even if a trigger
does not occur. Auto mode uses a timer that starts when the acquisition is started, and the
pretrigger information is obtained. If a trigger event is not detected before the timer times out,
the instrument forces a trigger. The length of time it waits for a trigger event depends on the
time base setting.
When forcing triggers in the absence of valid triggering events, Auto mode does not
synchronize the waveform on the display. The waveform will appear to jump across the screen.
If valid triggers occur, the display will become stable.
Normal trigger mode enables the instrument to acquire a waveform only when it is triggered. If
no trigger occurs, the last waveform record acquired remains on the display. If no last waveform
exists, no waveform is displayed.
Force Trigger Forces a trigger event regardless of whether the waveform meets any trigger conditions.
Holdoff
Trigger holdoff sets the amount of time the oscilloscope waits after a trigger event before
detecting and triggering on the next trigger event.
Random sets the instrument to wait for a random amount of time before recognizing another
trigger event. This means that successive acquisitions are unrelated to the previous trigger
signal.
Time sets the instrument to wait the specified time before recognizing another trigger event.
Use this option when the signal that you want to trigger on has several possible trigger points or
is a burst signal.
Holdoff Time Tap the Holdoff Time field and use the multipurpose knob to adjust the holdoff time value. Or
double-tap the field and use the virtual keypad to enter a time holdoff period.
Trigger Frequency Counter Turn On to display the trigger event frequency in the Trigger badge.
The trigger frequency can help you troubleshoot signal problems where the frequency of the
trigger event may be related to a clock, switching power supply, or other recurrent frequency
that occurs on your DUT.
Only available if you have installed the DVM option, which is available when you register your
instrument with Tektronix.
Menus and dialog boxes
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