Delayed Triggering
3–12
TDS 420A, TDS 430A, TDS 460A & TDS 510A User Manual
NOTE. When using the delayed triggerable mode, the digitizing oscilloscope
provides a conventional edge trigger for the delayed time base. The delayed time
base will not trigger if the main trigger type (as defined in the Main Trigger
menu) is logic, or if the main trigger type is pulse with the runt trigger class
selected.
To Run After Delay
You use the Horizontal menu to select and define either delayed runs after main
or delayed triggerable. Delayed triggerable, however, requires further selections
in the Delayed Trigger menu. Do the following steps to set the delayed time base
to run immediately after delay:
1. Press HORIZONTAL MENU
➞ Time Base (main) ➞ Delayed Only
(side)
➞ Delayed Runs After Main (side).
2. Use the general purpose knob to set the delay time.
If you press Intensified
(side), you display an intensified zone on the main
timebase record that shows where the delayed timebase record occurs relative to
the main trigger. For Delayed Runs After Main mode, the start of the intensified
zone corresponds to the start of the delayed timebase record. The end of the zone
corresponds to the end of the delayed record.
To learn how to set the intensity level, see Display Modes on page 3–17.
To Trigger After Delay
The Main Trigger menu settings must be compatible with Delayed Triggerable.
To select Delayed Triggerable mode, do the following steps:
1. Press TRIGGER MENU.
2. Press Type
(main) and either Edge or Pulse as fits your application.
3. Press HORIZONTAL MENU
➞ Time Base (main) ➞ Delayed Only
(side)
➞ Delayed Triggerable (side).
NOTE. The Delayed Triggerable menu item is not selectable unless incompatible
Main Trigger menu settings are eliminated. If such is the case, the Delayed
Triggerable menu item is dimmer than other items in the menu.
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