Operation Modes

See chapters predefined sequences, order of execution and process model for a better understanding.

In LTT terminology an operation mode is a sequence of operations, which is executed under certain conditions. Those conditions can be different voltage levels, temperatures or DUT states (sleep, normal).

A LTT sequence file contains some predefined sequences, together with various other arbitrary sequences and so called operation mode sequences. An operation mode sequence's name need to start with the prefix OPMODE or OM.

Operation Modes

You can think of an operation mode sequence as the main entry point for that operation mode. From there on it calls other sequences to do whatever the operation mode should do.

There is, however, a main entry point for the whole LTT sequence file. This entry point is called MainSequence and is responsible for switching to one of the defined operation mode sequences, depending on the current temperature chamber contact state (TCC) and the configuration you made in GUI's F10 dialog.

Do not make any changes to the MainSequence.

Operation Mode Cycle

The MainSequence will call an operation mode in a continuous cycle, which only exits as a result of a stop condition.

If there is no operation mode defined for the current TCC value, the testplan will execute a fallback sequence which does nothing but displaying a status in GUI, that there is no valid operation mode mapping.