Analyzing waveforms Set up DDR search parameters
Behavior
Clicking an entry in the Type column activates the individual searc
h controls, similar to the one shown
above. These controls vary depending on the search Type. Setting the search conditions is similar to
setting the parameters for an Event Trigger
(see page 386).
NOTE. No information will be displayed in this window until you specify at least one search Type in
the Search Select Control Window
(see page 300).
To use
Click the Source box and select the channels from the window. Select the search source (see page 301)
Select the DDR standard to search for from the DDR Standard drop-down lis t.
Select the source of the DQS Strobe from the Strobe DQS drop-down list.
Select the data rate from the Data Rate drop-down list.
Select the input levels from the Input Levels drop-down list.
If you selected the Custom input level, enter the High, Mid, Nd Low levels using the keypad or
attached keyboard.
Select the source of the Data DQ from the Data DQ drop-down list.
Select the source of the chip select and its active state from the CS and Active drop-down lists.
For some DDR searches, you may need advanced control over the chip select level and edge detection.
Select the chip select level mode from the Mode drop-down list.
If you select Manual mode, enter the level using the keypad or keyboard.
Enter the Edge Detection Hysteresis using the k eypad or keyboard.
Enter the Termination Logic Margin using the keypad or keyboard.
What do you want to do next?
Learn about bus setups (see page 95).
Learn about Custom Serial Bus Setup (see page 112).
Learn about advanced DDR search settings (see page 305).
DSA/DPO70000D, MSO/DPO/DSA70000C, DPO7000C, and MSO/DPO5000 Series 367
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