E−1CM 4000 Installation and Operating Manual
Appendix E

Mark/Search Commands in Jupiter Control System

This appendix is to clarify the operation and implementation of these two commands when used with the MC 3000 control
panel.
MC 3000 CONTROL PANEL OPERATION
The operation of the MC 3000 control panel is generalized to support time code and non−time code oriented machines. This
insures that the operator interface is consistent. Descriptions are included for operation with time code and without.
MARK Command Pushbutton
If the operator presses the MARK push button, the following operations are performed by the MC 3000 control panel driver:
1) The current time code value is captured by the MC 3000 driver. This value is stored locally and is used for the
Search command.
2) A ES−bus PRESET <time value> command is sent to the machine being controlled. This time value may be
used for future search commands.
SEARCH Command Pushbutton
If the operator presses the SEARCH push button, the following operations are performed by the MC 3000 control panel
driver:
1) The current machine PREROLL time value is subtracted from the previously stored MARK time value. The
preroll time value is found by interrogating the controlled machine and recovering the defined preroll time
value.
2) An ES−bus TARGET SEARCH <time value> command is sent to the machine being controlled. The machine
is placed in search mode and is moved to the time value included in the TARGET SEARCH command. Since the
time value sent to the machine incorporates the preroll time value, the machine will be moved to the PREROLL
location. The actual result of this command is determined by the operations of the controlled machine. In most
cases, the machine will cue to the previously marked location, this is usually less the PREROLL value.