Grass Valley VM 3000 System Controllers v.7.4 - Manual (Page 182)

Hardware Installation
2−110 VM 3000 Installation and Operating Manual
VDE EMI/RFI Modifications to Serial Data Cables
User−supplied serial data cables for VDE installations require a ferrite core over each end of the cable, adjacent to the connec-
tor.
Figure 2−125. Serial data cable VDE modifications.
Type 43 material
0.250 inch (6.35 mm) inside diameter
0.95 inch (24.13 mm) length (or longer)
Type 43 material sources
Fair−Rite, part no. 2643480002
Fair−Rite Products Corp., P.O. Box J, Commercial
Row, Wallkill, NY 12589, USA; Tel. (914) 895−2055.
Chomerics, part no. 83−10−A636−1000
Chomerics Inc., 77 Dragon Ct., Woburn, MA 01888
USA; Tel. (617) 935−4850.
Power Surge Protection using JUP−485−SUP Module
Voltage surges may occur in mobile van environments or other applications involving long serial cable runs or cases where
there is a possibility of a power spike appearing between the System Controller and a Jupiter control panel. The
JUP−485−SUP module, available as an option, connects to the VM serial port and uses an internal diode array to limit the
voltage on each of the RS−422/485 conductors to approximately eight volts. For more information, refer to Field Modification
Note 0750790xx or contact Grass Valley Technical Support.
Sync Reference Cables
A video reference (sync) signal should be connected to each Jupiter controller board (including the VM 3000 System Control-
ler, SI 3000 System Controller, and VG 3000 Video Display / Status Generator).
This signal may be color black or composite sync with an amplitude between 1 V P−P and 4 V P−P.
The VM 3000 System Controller must have a sync reference in order for a Grass Valley Crosspoint Bus router to switch during
the house vertical interval. Crosspoint Bus routers are listed on page 2−3.
Time Code Connections
Time code can be connected to a VM 3000, in which case the VM 3000 clock and the file server clock will automatically
synchronize to the time code source.