Behavior. Select A - B Trigger Sequence to use the A Event (main) trigger with the B Event trigger to capture complex data. The
A Event trigger arms the trigger system. The instrument then triggers on the B Event trigger defined by events or time. You can
also set up the instrument to delay the B Event Trigger by a specified time period by turning Horizontal Delay Mode on.
When you click on the trigger window controls, the trigger graphic displays a visual indicator of the trigger criteria. Depending on
the trigger type, the instrument will update the graphic as you define the trigger parameters.
What do you want to do next?
Learn about the A Event trigger types.
Learn about B Event triggers.
Learn about Trigger Mode and Holdoff.
Return to the Trigger Setup control window.
Change the serial bit rate
From the Trig menu, select Serial Pattern Setup.
To use. To change the bit rate of the serial bus on the display, double-click the Bit Rate entry box, and use the keypad or the
multipurpose knob to enter a new bit rate.
Behavior. The Standard you select determines the bit rate range. Adjusting the bit rate will change the standard to Custom.
Select the serial clock source
From the Trig menu, select Serial Pattern Setup.
To use.
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In the Clk Src drop-down list, select the clock source for the trigger. The instrument makes one attempt to recover the clock
from the data.
Behavior. If you are using R Clk as the clock source, and the clock recovery system does not lock to the input signal, the input
signal may be missing or the trigger level may be incorrect. In such an event, correct the problem and push the Level control Set
50% knob, to force the instrument to make another attempt at recovering the clock.
Select the serial coding standard
From the Trig menu, select Serial Pattern Setup.
To use.
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In the Coding drop-down list, select the coding standard for the trigger.
Behavior. The standard sets the bit rate. Changing the bit rate causes the standard to change to your own customized standard.
Oscilloscope reference
824 DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series
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