Tektronix TLA7AA Series, Service Manual

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Troubleshooting
6- 32
TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual
Power-On Diagnostics. Power-on diagnostics check basic functionality of the
logic analyzer at every power on. If any failures occur at power on, the screen
displays the calibration and diagnostics property sheet.
If there are no diagnostic failures when you power on the logic analyzer, you can
display and run the calibration and diagnostics property sheet by selecting
Calibration and Diagnostics from the System menu.
Extended Diagnostics. The extended diagnostics execute more thorough tests than
the power-on diagnostics. Using the extended diagnostics, you can do the
following tasks:
H
Run tests individually or as a group
H
Run tests once or continuously
H
Run tests until failures occur
NOTE
. Certain diagnostic tests will fail if probes are attached. For best results,
run the diagnostics with probes disconnected from the module.
To run the extended diagnostics, do the following steps:
1.
Disconnect the probes from the logic analyzer module.
2. Start the TLA application if it is not already running.
3. From the System menu, select Calibration and Diagnostics.
4. Select the Extended Diagnostics property page.
5. Select the individual tests, group of tests, or all tests.
6. Click the Run button.
While the tests are executing, the word Running displays adjacent to the tests.
When the tests are complete, either a Pass or Fail indication displays adjacent to
each test.
Merged Modules. The extended diagnostics include a special merge test that
verifies the correct pipeline adjustment for the master module, inside slave
module, and outside slave module. This test does not require the modules to be
physically merged together.
Every time modules are merged in the System Configuration window, a
calibration is performed between the merged modules. An error message will
appear if there are any problems with the merge cables, circuit board traces, or if
the calibration fails.