Akai DPS24 Operator's Manual page 110

EXT. SYNC
SETTING EXT SYNC OFFSETS
Pressing SHIFT+EXT SYNC allows you to set a timecode offset. This prompt appears on the LCD:
The first digit is highlighted and you should enter a value from the numeric keypad as appropriate. To set the 'sign'
(i.e. + or - ), move the cursor to the sign and press '+' or '-' on the numeric keypad as appropriate. Once an offset has
been entered, press SET [F6].
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