Settings panel (Timeout Trigger configuration menu) fields and controls
Field or control Description
Source
Lists the source channel or waveform to use to trigger.
Trigger When
• Stays High: The signal stays above the specified threshold level longer than the specified time.
• Stays Low: The signal stays below the specified threshold level longer than the specified time.
• Either: The signal stays above or below the specified threshold level longer than the specified
time.
Threshold Sets the amplitude level that the signal must pass through to be considered a valid transition.
Set to 50% Sets the threshold at 50% of the measured signal transition range. 50% is calculated as (Top +
Bottom)/2.
Time Limit Sets the time period condition to be met.
Mode & Holdoff
Trigger Mode determines how the instrument behaves in the absence or presence of a trigger event.
Holdof
f sets the amount of time the oscilloscope waits after a trigger event before detecting and
triggering on the next trigger event.
For additional information on Trigger Mode, Holdoff, forcing a trigger, and the Trigger Frequency
Counter see Mode and Holdoff panel on page 226.
Act On Trigger
Set the actions the instrument takes when a trigger event occurs.
For additional information on the Act On Trigger panel see Act On Trigger configuration
menu on page 227.
Trigger types
Use the following links to see more information on specific trigger types.
• Edge T
rigger menu
• Pulse Width Trigger menu
• Timeout Trigger menu
• Runt Trigger menu
• Logic Trigger menu
• Setup & Hold Trigger menu
• Rise/Fall Time Trigger menu
• Video Trigger menu
• Bus Trigger menu
• Sequence Trigger menu
Video trigger configuration menu
Use the Video Trigger menu to trigger the oscilloscope on video signals.
Trigger on specified fields or lines of a composite video signal. Only composite signal formats are supported. Trigger on NTSC, PAL, or
SECAM signals. Triggering also works with Macrovision signals.
Trigger on a variety of HDTV video standard signals, as well as custom (non-standard) bilevel and trilevel video signals with 3 to 4,000
lines.
To open the Video trigger menu:
Menus and dialog boxes
3 Series Mixed Domain Oscilloscope Printable Help 225
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