Grass Valley VM 3000 System Controllers v.7.4 - Manual (Page 358)

Configurator Machine Control Table
5−148 VM 3000 Installation and Operating Manual
Preroll
Number of seconds needed by this machine to come up to speed following a Play command. Most
machines will lock up in one second or less; two seconds is often used as a preroll value to provide a safety
margin. This value is used by the MC 3000 Machine Control Panel, Saturn Master Control Switcher, and
MCS 2000 Master Control Switcher. Only machines, MI−3040/2, MI−3040/4, and MI−3040/8 can have
preroll.
The Saturn, MC 3000, and MCS 2000 use this setting during Mark/Search operations. When SET MARK is
pressed, the present time code is stored; when SEARCH MARK is pressed, the machine will move the tape to
that point minus the preroll value. If there is no entry to the Machine Control Devices table, a two−second
preroll will be used automatically. Note: The Saturn and MCS 2000 both allow temporary override of the
Preroll vale; in this case, the value entered on the Machine Control Devices table is ignored during the next
transition.
For more information, see page 6−132 and Appendix E.
SATURN MASTER CONTROL SWITCHER
Saturn machine control configuration instructions are described in the Saturn Installation and Operating manual.