# Test Configuration

URL: https://irs.systems/en/docs/ltt/documentation/ltt-gui-manual/configuration/generatedfiles/testconfiguration

> [Click](/docs/assets/ltt/assets/ltt-test-config.xml) to open the test configuration file **ltt_test_config.xml**.

The test configuration file is an automatically generated file and contains all settings made in the [F10 - test parameter configuration](/en/docs/ltt/documentation/ltt-gui-manual/lttgui/dialogs/f10testparameterconfiguration) and [F11 - test configuration](/en/docs/ltt/documentation/ltt-gui-manual/lttgui/dialogs/f11testconfiguration) dialogs. It also contains some settings from the [F3 - project wizard](/en/docs/ltt/documentation/ltt-gui-manual/lttgui/dialogs/f3projectwizard).

> All test configuration settings are stored in configuration database, but are also exported to XML. The Action Logs mechanism use this file as a form of **documentation** of the parameter changes over time.

The LTT TestStand process model also uses some of those informations for its own purpose.

As a summary, you will find in the test configuration file the following informations:

- what DUT types are available?
- what test groups are available?
- how many test stations are present and what test orders / DUT's are configured for them?
- what operation modes are available and what parameters do they have (per test group)?
- what operation mode <> TCC mappings are configured?
- what power supplies / temperature sensors are assigned to what test group?

> Do not make any changes in this file as they will be overwritten by the GUI.