Identify four- and five-BNC analog video looms
On an older video wall or projection rack, a bundle of BNC leads may carry red, green and blue picture components plus one or two sync signals. Photograph the panel legends and the ends of the original bundle before disconnecting anything. Jacket colors vary across product lines.
How is the picture synchronized?
For five-connector RGBHV, look for horizontal and vertical sync labels on separate sockets. A four-connector configuration may use combined sync. Confirm both devices support the same arrangement. A breakout cable routes contacts to individual plugs; it does not create the missing sync format for an incompatible monitor.
Check each connector before threading the bundle
Some listed leads end in BNC plugs at both ends. Others break out a single HD15 to four or five BNC ends, including female versions. Check the available space through a conduit or rack slot for the whole connector bundle. Use removable tags to identify each signal during setup.
What if two leads have lost their tags?
Use the documentation for the exact breakout or trace the disconnected assembly with suitable test equipment. Treat the color scheme from another manufacturer's diagram as an example. Mark your recovered assignment at both ends and keep it with the monitor so a future move does not erase the work.
Map the color and sync labels before moving the monitor
A production rack can contain several BNC leads of the same color. Before removing a working monitor, label both ends according to the actual terminals, including any sync connections, and photograph the rear panel. A four-BNC assembly such as 10B1-06125 has four channels at each end. The 10H1-18106BK instead starts with an HD15 plug and breaks out to five BNCs. Neither contact count alone establishes the monitor's sync format. Check the monitor and source manuals, then choose the assembly that preserves the known signal path. This prevents a useful existing breakout from being replaced with a superficially similar bundle. Include a legible photograph of any H/V or composite-sync lettering.
Will a permanently labeled breakout save changeover time?
A theater that changes projectors between performances may need to reconnect several identical BNC shells in low light. Once a technician confirms the required sync arrangement and tests the complete setup, make a durable label for each branch using the equipment's actual terminal name. Label the corresponding monitor end as well. A useful kit includes a drawing seen from the connection side, because a front-view sketch can reverse left and right when a technician reaches around the rack. Allow enough branch length to reach the farthest jack without pulling on the shortest one. If a replacement bundle has different branch lengths or colors, carry the terminal names forward and retest the mapping during rehearsal before adding it to the show's spare case.
Compare parts for your setup
SVGA (HD15 Male) to BNC (5 Male) Monitor Breakout Cable, Black, Double Shielded, 6 foot
10H1-18106BK
- Connector references
- HD15 Male · BNC
- Length
- 6 ft
Count the BNC plugs and compare the equipment’s sync labels before choosing a four- or five-connector assembly. Measure the installed route against this 6 ft length.
BNC x 4 Male to BNC x 4 Male Cable, Double-Shielded, 25 foot
10B1-06125
- Connector references
- BNC
- Length
- 25 ft
Count the BNC plugs and compare the equipment’s sync labels before choosing a four- or five-connector assembly. Measure the installed route against this 25 ft length.
SVGA (HD15 Male) to BNC (5 Female) Monitor Breakout Cable, 1 foot
10H1-17201
- Connector references
- HD15 Male · BNC
- Length
- 1 ft
Count the BNC plugs and compare the equipment’s sync labels before choosing a four- or five-connector assembly. Measure the installed route against this 1 ft length.
