Tektronix DAS 9221 Option 04, User Manual

Page: 73 / 276

Operating Basics
DAS System User Manual
2–25
Figure 2–11: Channel Menu
After you have defined your channel setup, you should set up your clocking
requirements.
23. Point the mouse at the button labeled CLOCK at the bottom of the menu and
press the left button; the Clock menu displays. The menu should look similar
to Figure 2–12.
24. Point the mouse at the Clock field and press the right button. A pop-up
window appears.
You have basically three clocking choices: Internal, External, and Custom.
Custom clocking is used with the microprocessor support packages and
provides additional clocking choices for the particular package. If you have
not selected one of the software support packages, the Custom selection field
is grayed out indicating that it is nonselectable. Internal clocking allows you
to use asynchronous clocking; you can select the clock period in the clock
rate field. External clocking allows you to use synchronous clocking from
the system-under-test. You can further define your external clocking choices
by setting up clock equations.
25. Select Internal Clocking and close the clocking selection.
Set Up the Clock Menu