The LMH0346MH is an adaptive cable equalizer designed for SMPTE 424M, SMPTE 292M, and SMPTE 259M serial digital video signals. Manufactured by National Semiconductor (now Texas Instruments), it compensates for cable losses, allowing high-definition video signals to be transmitted over long distances with minimal signal degradation.

Applications:

• Broadcast Video Equipment: Used in video routers, switchers, and distribution amplifiers to maintain signal quality over long cable runs.
• Video Production Studios: Employed in cameras, video recorders, and editing systems to ensure reliable signal transmission.
• Security and Surveillance Systems: Applied in CCTV systems to compensate for cable losses in long-distance camera connections.
• Medical Imaging Equipment: Used in medical imaging devices to transmit high-resolution video signals accurately.
• Digital Signage: Integrated into digital signage systems to ensure clear and reliable video playback over extended cable lengths.

Features:

• Adaptive Equalization: Automatically adjusts equalization to compensate for varying cable lengths and types.
• SMPTE Compliance: Supports SMPTE 424M (3G-SDI), SMPTE 292M (HD-SDI), and SMPTE 259M (SD-SDI) standards.
• Low Power Consumption: Designed for efficient power usage, making it suitable for portable and battery-powered applications.
• Cable Loss Compensation: Equalizes up to 400m of Belden 1694A cable at 1.485Gbps.
• Automatic Cable Detection: Automatically detects the presence of a cable and adjusts the equalization accordingly.
• Output Return Loss: High output return loss ensures signal integrity and reduces reflections.

Benefits:

• Extended Transmission Distances: Enables reliable transmission of high-definition video signals over longer cable lengths.
• Improved Signal Quality: Compensates for cable losses, resulting in clearer and more accurate video signals.
• Simplified System Design: Automatic equalization simplifies system design and reduces the need for manual adjustments.
• Reduced Power Consumption: Low power consumption minimizes energy costs and extends battery life in portable devices.
• Enhanced System Reliability: Robust equalization ensures consistent performance even with varying cable conditions.

The LMH0346MH is available in a small MH package. It operates from a single 3.3V power supply. The device also incorporates features such as output mute and power-down modes to further reduce power consumption when not in use. Its automatic cable detection and adaptive equalization capabilities make it a versatile and easy-to-use solution for a wide range of video transmission applications. The LMH0346MH is part of a family of cable equalizers from Texas Instruments, offering solutions for various data rates and cable types.