Sony hdw-730 Operation Manual page 108

You cannot set a REC TIME that is more than one thirtieth of
TAKE TOTAL TIME.
For example: When TAKE TOTAL TIME is set to 1H, the
maximum value of REC TIME is 2 MIN. (60 minutes divided by 30
gives 2 minutes.)
The time setting to be displayed when turning the MENU knob
3
changes within the available setting times.
Be sure to set REC TIME after setting TAKE TOTAL TIME.
15
Push the MENU knob.
The ? mark at the left of setting changes to a z mark and the z
mark at the left of TAKE TOTAL TIME changes to an t mark.
16
Turn the MENU knob to move the t mark to PRE-LIGHTING.
17
Push the MENU knob.
The t mark at the left of PRE-LIGHTING changes to a z mark
and the z mark at the left of the setting changes to a ? mark.
18
Turn the MENU knob clockwise or counterclockwise until the
desired time to turn on the light before starting recording appears.
3-34
Chapter 3 Recording and Playback