Standard Generator Duration - What are standard Generators?

Hi,

So I am studying all the setting of DR and I came a cross on this setting "Standard Generator Duration".
Just want to know what are does standard generators they are referring. I already try searching but cant find a answer.

Thank you.

it is not 'duration of standard generators', but 'standard duration for generators'.

it is not 'duration of standard generators', but 'standard duration for generators'.

Ok Tom. then what are does generators?

Regards,

Black, colour, colour bars, text.

Also grayscale, 10-step gray, various ramps and test signals. Very handy. I always include at least 1 second of SMPTE bars and Grayscale ramp at the head of every Rec709 export I do (prior to slate) just to confirm that nothing went south in terms of colorspace or levels.