3
Using the Scope Functions
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Agilent U1602A/U1604A User’s and Service Guide
•
Set to 50%
trigger level sets the trigger level to the center of the
High/Low value of the waveform currently displayed. This setting
is useful when the trigger level is beyond the display.
• Polarity
Press F2 on page 2/2 to select positive
and negative
polarity for the pulse width you want to capture. The selected pulse
polarity is displayed in the trigger status line.
The positive pulse with trigger on the high to low transition of the
pulse if the qualifying condition is true. The negative pulse will
trigger on the low to high transition of the pulse if the qualifying
condition is true.
• Condition
Press F3 on page 2/2 to set the pulse width and qualifying condition.
You can set the pulse width by turning the rotary switch. There are
4 conditions for your selection:
•
The “less than” (<) qualifier sets the instrument to trigger on a
pulse width less than the time value.
•
The “greater than” (>) qualifier sets the instrument to trigger on a
pulse width greater than the time value.
•
The “equal” (=) sets the instrument to trigger with equivalent to
the time value.
•
The “not equal” (
≠
) sets the instrument to trigger with not
equivalent to time value.
Pattern Trigger
The Pattern trigger identifies a trigger condition by looking for a specific
pattern. This pattern is a logical gate combination of the channels. Each
channel can have a value of high (H) and low (L).
