When an SDI system contains only two or three cables, identifying a connection is easy.

When a broadcast rack, production truck, studio or live event contains dozens—or hundreds—of BNC connections, proper cable identification becomes much more important.

A good labeling system can reduce troubleshooting time, simplify equipment changes and help technicians understand a signal path without tracing every SDI cable by hand.

Whether you're installing a permanent broadcast rack or deploying a temporary production system, the goal is the same:

A technician should be able to look at a cable and quickly determine where it comes from and where it goes.

WHY LABEL SDI CABLES?

Professional video systems frequently contain multiple connections that look nearly identical.

A rack might contain dozens of black BNC cables connected to a router, multiviewer, converter or monitor.

Without identification, finding one particular signal can require manually tracing the cable through the rack.

Proper labeling can make it easier to:

• Troubleshoot missing video
• Replace equipment
• Move router connections
• Identify camera feeds
• Service production racks
• Deploy and recover temporary systems
• Identify channels in multi-channel cable snakes

The more complicated the system becomes, the more valuable a consistent labeling standard becomes.

LABEL BOTH ENDS OF THE CABLE

One of the simplest rules is also one of the most important:

Label both ends.

If only one end is identified, a technician working at the opposite side of the rack still has to trace the cable.

Matching identification at both ends allows the connection to be recognized regardless of which piece of equipment is being serviced.

WHAT INFORMATION SHOULD BE ON AN SDI CABLE LABEL?

The exact format depends on the size of the system, but useful information can include:

• Source equipment
• Source port
• Destination equipment
• Destination port
• Camera number
• Router input or output
• Rack number
• Snake channel
• Cable identification number

For a small system, something as simple as CAM 1 may provide enough information.

A larger facility may need a structured identifier such as:

R1-RTR-OUT12 → MVW-IN04

The specific naming convention matters less than using it consistently.

SOURCE-TO-DESTINATION LABELING

One useful approach is to identify both the source and destination directly on the cable.

For example:

This allows a technician to understand the complete connection without consulting separate documentation.

It works particularly well for relatively permanent point-to-point connections.

Systems that are frequently reconfigured may benefit from assigning each cable a permanent identification number and maintaining the source and destination separately in system documentation.

KEEP LABELS SHORT AND READABLE

A cable label has limited physical space.

Trying to place a full equipment description on a small coaxial cable can make the label difficult to read.

Instead, develop short abbreviations that technicians can understand.

Document the abbreviations used by the facility so technicians don't have to guess what they mean.

COLOR CODING CAN HELP—BUT DON'T RELY ON COLOR ALONE

Color can provide another quick visual reference.

For example, a facility might use different colors to identify cameras, router connections or specific production areas.

However, color should generally supplement a written or numbered identifier rather than replace it.

A numbered label still communicates the required information when cables are viewed in poor lighting, when several shades appear similar or when the labeling system is unfamiliar to a visiting technician.

LABELING SDI SNAKE CABLES

Channel identification becomes especially useful with multi-channel SDI snake cables.

A snake may contain three, five or more individual SDI paths inside one organized assembly.

Without clear identification, determining which breakout leg corresponds to which channel can become unnecessarily difficult.

Each breakout should have a clearly identifiable channel number at both ends:

If the snake has a permanent application, the channel can also include a functional description such as CAM 1, CAM 2 or RETURN 1.

LABELING HIGH-DENSITY RACKS

High-density racks are where a good labeling strategy can provide the greatest benefit.

Compact Mini RG59 assemblies allow many SDI connections to occupy relatively little space, while HD-BNC and DIN 1.0/2.3 connectors may allow equipment manufacturers to increase connector density even further.

That density makes it even more important to know exactly which cable you're disconnecting.

Labels should be positioned so technicians can read them without unplugging neighboring cables whenever practical.

LABELING FOR MOBILE PRODUCTION

Production trucks, fly packs and portable systems present another challenge: connections may change frequently.

A cable that carries Camera 2 today may have a different assignment at the next event.

For these systems, a permanent cable number can be more useful than permanently labeling the cable for one specific signal.

For example:

The production documentation or patch sheet can then record the current assignment of each cable.

This provides permanent cable identification without limiting the assembly to one application.

DON'T COVER IMPORTANT CABLE INFORMATION

Place labels where they are easy to see without unnecessarily covering manufacturer identification or other useful cable markings.

Also avoid placing bulky labels where they interfere with connector operation, strain relief or tight equipment spacing.

The label should make servicing the cable easier—not create another mechanical problem.

KEEP THE DOCUMENTATION CONSISTENT

Cable labels become much more valuable when they match the rest of the system documentation.

If a cable is labeled SDI-042, the same identifier should appear on the rack drawing, signal-flow documentation or cable schedule.

Consistency allows technicians to move quickly between the physical installation and its documentation.

It also makes future system expansion much easier.

LABEL BEFORE THE RACK BECOMES CROWDED

The easiest time to establish a labeling system is during the initial installation.

Trying to identify dozens of visually identical black coaxial cables after a rack has already been completed can turn a simple labeling project into a major tracing exercise.

For a new installation:

• Define the naming convention first
• Label each cable before final routing
• Verify both ends
• Update the cable schedule
• Then secure the final cable bundles

SDI CABLE LABELING CHECKLIST

THE BOTTOM LINE

SDI cable labeling may seem like a small detail when a system is being built, but it can save significant time every time that system needs to be changed, serviced or troubleshot.

The best system doesn't have to be complicated.

Label both ends, use consistent identifiers and make sure the physical labels match the system documentation.

Whether you're working with a five-channel SDI snake or hundreds of connections in a broadcast rack, a technician should be able to identify the signal path without guessing.

BUILD A CLEANER PROFESSIONAL SDI SYSTEM

AV-Cables manufactures professional SDI assemblies for broadcast racks, production trucks, studios, fly packs, live events and professional AV installations.

Available configurations include 12G-SDI, 6G-SDI, BNC, HD-BNC, DIN 1.0/2.3, Mini RG59, RG59, RG6 and multi-channel cable assemblies.

AV-Cables assemblies are hand assembled in the USA and individually tested before shipment.

AV-Cables — Professional • Reliable • Connected