SMPTE 311M Hybrid Camera Cable: The Robust Link for Broadcast & Live Production

Engineered for the rigorous demands of modern broadcasting, our Hybrid SMPTE 311M Camera Cable is an all-in-one solution that delivers unmatched reliability for high-definition (HD) television production, live event coverage, and outside broadcast (OB) vans. This cable integrates fiber optics for pristine signal transmission, power conductors for camera operation, and control wires into a single, rugged assembly, ensuring flawless performance where it matters most.

Key Features & Technical Advantages

✔ Triple-Function Hybrid Design: Combines signal, power, and control lines to streamline setups and replace multiple cables.
✔ Superior Signal Integrity: The internal fiber optics ensure low attenuation, supporting high-speed, uncompressed HD video transmission for 4K/8K HDTV and 3G-SDI systems.
✔ Robust Shielding & LSZH Safety: Features overall braided shielding for effective EMI/RFI protection, coupled with a Low Smoke Zero Halogen (LSZH) jacket that enhances safety in enclosed spaces by minimizing toxic emissions and corrosion in a fire.
✔ Broadcast Compliance: Designed to meet SMPTE 311M and 304M standards, guaranteeing compatibility with professional broadcast equipment and connectors.
✔ Rated for Professional Use: 300V voltage rating and a durable construction built to withstand repeated deployment in field production, from sports broadcasting to film sets.

Cable Structure & Specifications

Why Choose Our SMPTE 311M Hybrid Cable?

• Proven Durability: The cable is engineered with materials that resist moisture and ozone, making it suitable for a variety of environments where weather resistance is required. Some manufacturers, like Belden, also incorporate an internal stainless steel strength member in their assemblies for increased durability.

• All-in-One Convenience: Simplifies your camera rigging, reduces cable clutter, and significantly cuts down on setup and teardown time during fast-paced live events.

• Designed for Dynamic Use: Its robust yet flexible construction is suited for use in robotic camera systems, triax-free setups, and mobile production trucks.

• 

Primary Applications

This high-performance cable is the preferred choice for broadcast engineers and production companies worldwide.

• Studio and Outside Broadcast (OB) Vans: Reliable interconnection between cameras and base stations.

• Live Sports and Event Broadcasting: Durable enough for field production and long-distance runs.

• Film Production and Electronic News Gathering (ENG): Ensures high signal quality for on-set HD camera systems.

• Robotic and PTZ Camera Systems: Provides the necessary power, control, and signal in one flexible cable.

Your Trusted Manufacturer for Custom Broadcast Solutions

As a factory with integrated industrial and trade capabilities, we specialize in producing high-quality specialty cables. We offer OEM/ODM services and can work with you to customize cable lengths, shielding performance, and connector terminations (such as OpticalCON or HDI) to meet the specific needs of your production environment.

 Ready to Elevate Your Broadcast Signal Chain?

•  Request a Custom Quote – Get pricing tailored to your project requirements.

•  Download the Technical Data Sheet (PDF) – Access detailed specifications and compliance certificates.

•  Contact Our Engineering Team – Discuss custom integration and connector options.

•  Request a Free Sample – Test the quality and performance firsthand.

Ready to Elevate Your Broadcast Signal Chain?

• Request Sample & Compliance Data - Get pricing tailored to your project requirements.

• Download Technical Specifications - Access detailed specifications and compliance certificates.

• Contact Our Engineering Team - Discuss custom integration and connector options.

• Get Competitive Quotation - Test the quality and performance firsthand.

FAQ

1. What is a Hybrid SMPTE 311M Cable, and what is its primary function?

Answer: A Hybrid SMPTE 311M cable is a standardized triaxial cable designed specifically for broadcast and digital cinematography camera systems. Its primary function is to provide a single-cable solution for transmitting power, video signals (like HD-SDI), data, intercom audio, and control signals (such as Genlock and Camera Control) between a camera head and its base station or power supply. This simplifies on-set rigging, reduces cable clutter, and enhances operational reliability.

2. What are the key technical specifications and compliance standards for this cable?

Answer: Our cable strictly adheres to the SMPTE 311M-L standard, ensuring interoperability with major broadcast equipment. Key specifications include:

• Conductors: Triaxial design with precise impedance matching (e.g., 75 Ω for the inner video core).

• Power Conductors: Sufficient gauge for carrying camera operating voltage and current.

• Shielding: Multi-layer shielding (typically braid and foil) for superior EMI/RFI rejection, critical for clean signal transmission in environments with wireless gear.

• Connectors: Standardized 26-pin LEMO FGG.1B or equivalent connectors for secure, locking connections.

• Jacket: Highly flexible, durable, and often oil-resistant for demanding field use.

3. What is the maximum recommended length for a SMPTE 311M cable run?

Answer: The maximum reliable length depends on the specific camera system and signals transmitted. Generally, for full functionality (including power), 100 meters (328 feet) is a common practical limit without requiring signal repeaters or external power injection. For longer runs, consult the camera manufacturer's specifications, as some systems may support extensions with approved methods or specialized hybrid fiber solutions.

4. Can this cable be used with all broadcast cameras that have a triax port?

Answer: While the SMPTE 311M standard ensures physical and basic electrical compatibility, it is crucial to verify compatibility with your specific camera model (e.g., Sony, Grass Valley, Ikegami). Most major broadcast cameras designed for triax operation are compatible, but always check your camera's technical manual to confirm it supports the SMPTE 311M-L protocol and to understand any specific power requirements or pin assignments that must be matched by the cable.

5. How do I maintain and ensure the longevity of my Hybrid SMPTE 311M Cables?

Answer: Proper handling is essential for performance and lifespan. Key practices include:

• Coiling: Always coil the cable in large, loose loops (preferably a figure-8 or over-under method) to prevent internal conductor damage and maintain flexibility.

• Connectors: Protect connectors from dirt, moisture, and impact. Use dust caps when not in use.

• Inspection: Regularly inspect connectors for bent pins and the cable jacket for cuts or severe kinks.

• Storage: Store coiled cables in a dry, temperate environment, avoiding extreme heat or cold.