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Test Definition 154
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If you have many similar tests, the drive required for the current test may be estimated from a standard
drive signal. To do this, perform the following steps:
1.
Run one of the tests and wait until the output has reached the desired amplitude (i.e. the test
switches to Run mode and the "Run" button turns green).
2. Select the Test..Create Standard Drive File menu command to save that test's drive output as
a standard output.
3. Open another test (or create a new test)
4. Edit the test schedule and click the "Start with standard drive" button. This will read the standard
drive signal used by the first test and reshape it to match the profile of the second test.
5. Repeat steps 3 and 4 for any other similar tests.
Note: the standard drive signal only needs to be created once, as long as the system configuration
(amplifier gain, shaker system, etc.) does not change.
To disable the use of the memorized drive signal and revert to the slow test start-up, uncheck the
"Enable memorized drive" box.
For levels 2 and above, the "Enable memorized drive" check box will enable fast switching of output
levels between the previous level and the current level. The system will compute the difference in the
desired output levels, and scale the drive signal accordingly. If "Enable memorized drive" is not
checked for levels 2 and above, the transition will be gradual, with the transition speed controlled by the
Start Gain defined for the test.
See Also
Test..Save Current Drive
Test..Create Standard Drive File
4.3.3 Parameters tab
Random Define Parameters tab
Clicking the "Parameters" tab on the Test..Edit Test Settings dialog box accesses this dialog box.
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