Keysight DSOX3012T, Руководство пользователя

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178 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
11
Triggers
• When the time range ( >< ) qualifier is selected, the Entry knob sets the upper
time range value.
Pulse width
trigger > qualifier
time set softkey
• When the greater than ( > ) qualifier is selected, the Entry knob sets the
oscilloscope to trigger on a pulse width greater than the time value displayed
on the softkey.
• When the time range ( >< ) qualifier is selected, the Entry knob sets the lower
time range value.
Pattern Trigger
The Pattern trigger identifies a trigger condition by looking for a specified pattern.
This pattern is a logical AND combination of the channels. Each channel can have
a value of 0 (low), 1 (high), or don't care (X). A rising or falling edge can be
specified for one channel included in the pattern.
1 Press the [Trigger] key.
2 In the Trigger Menu, press the Trigger softkey; then, turn the Entry knob to
select Pattern .
3 Press the Qualifier softkey; then, turn the Entry knob to select from the pattern
duration qualifier options:
• Entered – when the pattern is entered.
• < (Less Than) – when the pattern is present for less than a time value.
• > (Greater Than) – when the pattern is present for greater than a time value.
The trigger occurs when the pattern exits (not when the > softkey time value
is exceeded).
• Timeout – when the pattern is present for greater than a time value. In this
case, the trigger occurs when the > softkey time value is exceeded (not when
the pattern exits).
• >< (In Range) – when the pattern is present for a time within a range of values.
• <> (Out of Range) – when the pattern is present for a time outside of range of
values.
Pattern durations are evaluated using a timer. The timer starts on the last edge
that makes the pattern (logical AND) true. Except when the Timeout qualifier is
selected, the trigger occurs on the first edge that makes the pattern false,
provided the time qualifier criteria has been met.