The vector memory consists of opcodes that are executed by the sequencer. The API allows users to write to one or more channels at a time in a random-access fashion.
To write to the Vector Memory, use the Edit Vector editor in the Steps page:

Fill the 10 vectors define for step 0 as follows:

Vector Editor
Relevant API functions: GtDio6xWriteVectorMemory.
Relevant API functions: GtDio6xReadVectorMemory .
Relevant API functions: GtDio6xFillVectors.