Tektronix WCA200A, Руководство пользователя

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Trigger
3- 158
WCA230A & WCA280A User Manual
Define Mask... Option 02 only . Creates a trigger mask when the trigger mode is
set to Triggered and the source is set to Freq Mask. The trigger mask is created
in the spectrum view. Refer to page 3--165 for details on creating a trigger mask.
Slope.
Selects the trigger slope when the trigger mode is Triggered and the
trigger source is External.
H
Rise. The trigger occurs at the rising edge of the trigger signal.
H
Fall. The trigger occurs at the falling edge of the trigger signal.
H
Rise and Fall. The trigger occurs at the rising edge of the trigger signal to
acquire the first block, and at the falling edge to acquire the next block. The
rising and falling edges alternate at each block acquisition.
H
Fall and Rise.
The trigger occurs at the falling edge of the trigger signal to
acquire the first block, and at the rising edge to acquire the next block. The
rising and falling edges alternate at each block acquisition.
Trigger level
Rise
Trigger occurs
Fall
Figure 3- 107: Trigger level and slope
When using a trigger mask (Option 02 only).
When the trigger source is set to
Freq Mask for using a trigger mask, the following selection items are available:
H
In.
The trigger occurs when an input signal exits the blue area of a trigger
mask and enters the black area.
H
Out. The trigger occurs when an input signal exits the black area and enters
the blue area of a trigger mask.
H
In and Out. The analyzer triggers with In to acquire the first block, and Out
to acquire the second. In and Out alternate at each block acquisition. Use the
acquisition history control to view alternate In/Out blocks.
H
Out and In. The analyzer triggers with Out to acquire the first block, and In
to acquire the second. In and Out alternate at each block acquisition. Use the
acquisition history control to view alternate In/Out blocks.