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Using a multi-state sequences, Figure 12.36 example 4: complete rule – Teledyne LeCroy UWBTracer User Manual User Manual

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UWBTracer/Trainer User Manual

Chapter 12: Recording Options

LeCroy Corporation

215

Step 4 From the Action pop-up menu, select the Filter In option.

Recording is now set to only record frames with MPI errors (Figure 12.36).

Figure 12.36 Example 4: Complete Rule

Using a Multi-State Sequences

Multi-state sequences allow you to create conditions that branch down to successive
states or loop back to the beginning of the sequence. They are more complex than
single-state sequences but very powerful.

Example 5: Creating a Looping Sequence

Following is a typical example of a multi-state sequence. In this example, the analyzer
waits for a WUSB Data packet (first state). When it detects a Data packet, the analyzer
waits for a corresponding ACK packet and starts a timer (second state).

If an ACK is received before the timer expires, the sequence restarts. If an ACK is not
received before the timer expires, recording is triggered.

Step 1 Click the New Event button. From the drop-down menu, select WUSB

PID > DATA to create a Data button in the Available Events area.

Step 2 Drag-and-drop the Data button into the first cell in the Main Display area.