HP 64783A, User Manual

Page: 234 / 816

To change the trace depth
•
Choose Trace
→
Display Options... and in the dialog box, enter the desired trace
unload depth in the field beside Unload Depth. Then click the OK or Apply
pushbutton.
•
Using the command line, enter:
display trace depth <depth>
Using one of the above command forms, you specify the number of states that will
be unloaded for display, copy, or file storage. By reducing the trace unload depth,
you shorten the time it takes for the interface to unload the trace information. You
can increase the trace unload depth to view more states of the current trace.
Regardless of how much or how little unload depth you specify, the entire trace
memory will be filled with captured states during a trace.
In the deep analyzer, the maximum number of trace states depends on whether or
not you installed memory modules in the analyzer card, and the capacity of the
memory modules. Refer to Chapter 19, "Installation and Service", for details. In
the 1K analyzer, the maximum number of trace states is 1024 when counting is
turned off, and 512 otherwise. In either analyzer, the minimum trace depth is 9.
Trace data must be unloaded before it can be displayed, copied, or stored in a file.
If you wish to reduce the number of states that are unloaded for display, you must
enter the unload depth specification (in one of the two ways shown above) before
you enter the trace command. The above commands cannot be used to reduce the
number of states displayed in the current trace. You can enter a new unload depth
specification after a trace is complete to increase the amount of trace memory that
is unloaded, if desired.
Chapter 5: Using the Emulation-Bus Analyzer
Making Simple Trace Measurements
204