Instruction manual

Version: 100505 VTC-4000 INSTRUCTION MANUAL Page 9 of 27
begin two seconds after the GPI. The new edit location can be changed by taking control of the VTR and moving
its location.
GENERAL PURPOSE OUTPUTS (GPO)
General purpose outputs are provided on the GPI DB15F connector. Each of the four GPOs can be programmed
to fire relative to edit IN points and/or cycle tested (see GPO SETTINGS). GPOs can be fired manually by tapping
HOME, then holding the numeric keypad 0 key while tapping the 1-4 keys. GPOs 1-4 are available on pins 11-14,
respectively; common ground is on pin 15. Outputs are open-collector type and are pulled up to +5 volts through
10K resistors allowing direct drive of TTL and 5 volt CMOS logic. The GPO outputs can drive externally applied
voltages of up to 60 volts at up to 100 mA to ground through a resistance of approximately 17.5 Ohms. The
outputs are implemented with 7.5 Ohm on-resistance FETs and 10 Ohm series resistors (with capacitors for ESD
protection) so saturation (on state) voltage is directly related to applied current (Vsat = I * 17.5).
SWITCH OPTION
The optional RM-4000-S switch type Remote Processor reduces the number of controlled devices from ten to six.
Six additional RS-422 ports connect to external controllers allowing controlled devices to be shared. Control of the
devices connected to the VTR-1 through VTR-6 connectors are toggled between the VTC-4000 and the controllers
connected to the CONT-1 through CONT-6 connectors by holding F10 while tapping F1-F6, respectively. When
control of a device is released to an external controller, the red (right) LED above the device’s F-key flashes at a
medium rate. While released using F10, attempts to control the VTR will be ignored. Control is auto-released by
holding F9 while tapping F1-F6. This releases control, but when any transport key is hit or the knob is turned,
control is automatically restored to the panel for one second, then released again. Auto-released devices are
automatically acquired for control during edit and synch operations. Regain control permanently by holding F10
while tapping F1-F6 while released. Devices released while in Play will appear to continue playing even if stopped
locally or tape runs out.
F7 and F8 are not needed for VTR selection with the switch option, so instead are used for quick trim. The
timecode set in the F7/F8 TRIM TIME (switch option only) menu is added to the currently selected VTR's IN point
by tapping F8, or subtracted with F7.
COLD BOOT
If for any reason, you wish to reset the VTC-4000 back to the factory preset configuration, a “COLD BOOT” may be
performed. This operation erases all events, and some internal registers; personality registers are not affected. A
cold boot is accomplished by unplugging the modular cable from the rear of the panel, and holding the MARK and
PLAY keys down while plugging the cable back in.