Tektronix TDS5054, Руководство пользователя

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Triggering
3- 72
TDS5000 Series User Manual
Overview Control elements and resources To trigger on a runt pulse
Qualify the runt
trigger
6.
To qualify the runt pulse trigger, click Trigger When Runt
and select from the list:
H
Occurs triggers on all runt pulses regardless of
width.
H
Wider triggers only on runt pulses that exceed the
minimum width you set. Enter the Width using the
multipurpose knob or pop-up keypad.
H
Logic triggers on a logic-qualified runt pulse. When
the oscilloscope detects that a runt has occurred, it
checks the logical state of two other available
channels and triggers only if their conditions are
met. Each channel can have a value of high (H),
low (L), or “don’t care” (X). A value is considered
high if the channel input voltage is greater than the
specified threshold voltage; a value is considered
low if the channel input voltage is less than the
specified threshold voltage. Use the “don’t care”
selection for any channels that will not be used as
part of the pattern. (Only available on the TDS5054
and TDS5104 models.)
Set the
thresholds
7. To set the threshold levels, click Upper Limit or Lower
Limit and use the multipurpose knobs or pop-up keypad
to set the values.
Hint: To use the trigger level marker to set the threshold
levels, open the Display Setup control window and click
Long on the Objects tab.
Set mode and
holdoff
8. Mode and holdoff can be set for all standard trigger
types. Refer to
Select the trigger mode on page 3--56
and Set holdoff on page 3--59. To learn more about
trigger mode and holdoff, see Trigger Modes on
page 3--51 and Trigger Holdoff on page 3--52.
For mode and holdoff setup, see Select the trigger
mode on page 3--56 and Set holdoff on
page 3--59.