15.2 Trigger Section
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15.2 Trigger Section
Trigger method
Digital comparison
Trigger modes
• Memory Function and FFT Function: Single, Repeat or Automatic
• Recorder Function: Single or Repeat
• REC&MEM Function: Single, Repeat, or Timer
• Real-Time Saving Function: Single, Repeat, or Timer
Trigger source
Analog, logic A to D, external trigger, manual trigger, timer trigger
Free-run operation occurs when all trigger types are off.
• Normal Mode
All analog channels can be set as trigger sources
• Expanded Mode
One analog channel can serve as multiple trigger sources
(Up to eight trigger sources on channels in modules (Units) 1 to 4 in Models 8860-50
and 8861-50, plus an additional eight sources on channels in modules 5 to 8 in
Model 8861-50.)
External triggering occurs by applying a 2.5 V falling edge signal, or shorted terminals
(can be set to rising edge).
The sources of trigger events are displayed
Trigger criteria
AND or OR of each trigger source
Trigger types (analog)
• Level Trigger
Set digitally as a voltage value below full-scale
Triggering occurs when the signal rises (or falls) through a specified value.
• Windows Trigger
Upper and lower trigger threshold levels are specified
Triggering occurs when the signal enters or exits the defined threshold range.
• Period Trigger*
A trigger period reference voltage level and period range are specified
The period of the signal rising (or falling) through the specified level is measured,
and triggering occurs when the period is outside of the specified range.
• Glitch Trigger
*
Triggering occurs when the signal pulse width is narrower than the specified pulse
width defined as rising or falling through a specified voltage level.
• Slope Trigger*
Triggering occurs when the signal exceeds (or does not exceed) a specified rate of
change.
• Voltage Sag Trigger (Drop)
Triggering occurs when peak voltage falls below the specified level (for commercial
power).
(* Expanded setting only)
Specified Event
The number of times trigger criteria are met (on all trigger sources) is counted, and trig-
gering occurs when the specified event count is reached.
Trigger types (logic)
Pattern (mask) trigger by 1, 0, 0|1 or X
(0|1: triggering occurs when changing to either state, X: don’t care)
Trigger filter
Off or 0.1 to 10.0 div (settable in 0.1 increments) (Memory Function and REC&MEM
Function)
On (10 ms), Off (Recorder Function)
Trigger level resolution
0.1% f.s. (f.s. = 20 div)
Pre-trigger
-100 to 100% (settable in 1% increments) recording time is displayed before and after
triggering (Memory Function, Recorder Function and REC&MEM Function)
Trigger timing
Start, Stop and Start & Stop (Recorder Function)
Start and Stop criteria can be set independently.
Содержание 8860-50
Страница 2: ......
Страница 12: ...Contents x...
Страница 18: ...Reading this Manual 6...
Страница 24: ...1 3 Interconnection and Block Diagrams 12...
Страница 180: ...6 12 Making Trigger Settings on the Waveform Screen 168...
Страница 246: ...8 15 Inserting and Searching for Event Marks on a Waveform 234...
Страница 354: ...12 7 Print Examples 342 Print Example 4 Row Printing 1 4 steps Settings data Each step is 25 div...
Страница 356: ...12 7 Print Examples 344 A B Waveform_________________________________________________...
Страница 360: ...12 7 Print Examples 348 Event ________________________________________________________ Event mark...
Страница 406: ...14 2 External I O 394...
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