The Basics Of Starting, Stopping, And Displaying Traces - HP 64746 User Manual

The Basics of Starting, Stopping, and Displaying Traces

The Basics of Starting, Stopping, and Displaying
Traces
This section describes the basic tasks that relate to starting and stopping trace
measurements.
When you start a trace measurement, the analyzer begins looking at the data on the
emulation processor's bus and control signals on each analyzer clock signal. The
information seen on a particular clock is called a state.
When one of these states matches the "trigger state" you specify, the analyzer stores
states in trace memory. When trace memory is filled, the trace is said to be
"complete." The default trigger state specification is "any state," so when you start
a trace measurement after initializing the analyzer, the analyzer will "trigger" on the
first state it sees and store the following states in trace memory.
Once you start a trace measurement, you can view the progress of the measurement
by displaying the trace status.
In some situations, for example, when the trigger state is never found or when the
analyzer hasn't filled trace memory, the trace measurement does not complete. In
these situations, you can halt the trace measurement.
Once a trace is displayed, you can use the cursor keys and other keys to position the
trace list on the display. To speed up the display of traces, you can reduce the
depth of the trace list. Also, when entering trace commands, there is a special
command that allows you to recall and modify the last trace command entered.
This section describes how to:
•
Start trace measurements.
•
Display the trace status.
•
Stop trace measurements.
•
Display the trace.
•
Position the trace display on the screen.
•
Change the trace depth.
•
Modify the last trace command entered.
Chapter 7: Using the Emulation Analyzer
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