Ramsey STEUSB311 USB 3.1 SuperSpeed RF Isolated Interface

The Ramsey STEUSB311 is a high-performance USB 3.1 SuperSpeed RF isolated interface designed for use in RF shielded enclosures, EMC test environments, wireless device testing and digital forensic applications. Engineered to maintain high-speed USB data connectivity while preserving enclosure shielding effectiveness, the STEUSB311 delivers exceptional RF isolation without compromising performance. With support for USB 3.1 SuperSpeed data rates and advanced charging protocols, it is an ideal solution for laboratories, test facilities, security professionals and forensic investigators requiring secure, interference-free communications.

Built upon Ramsey's proven RF isolation technology, the STEUSB311 provides greater than 90 dB of RF isolation from 500 MHz to 8 GHz while maintaining full USB functionality. Its compact single-hole mounting design allows simple installation and seamless upgrades from existing USB 2.0 interfaces, making it a popular choice for both new installations and retrofit projects.

Key Features

• USB 3.1 SuperSpeed data transfer support up to 5 Gbps
• Greater than 90 dB RF isolation from 500 MHz to 8 GHz
• Designed for RF shielded enclosures and screen room applications
• Compatible with USB 3.1, USB 3.0, USB 2.0 and earlier USB standards
• Supports DCP, CDP and proprietary charging protocols up to 2.2A
• Automatic detection and indication of charging mode
• Compact RF-tight single-hole mounting design
• Integrated port protection and strain relief system
• Includes universal power supply, mounting hardware and shielded USB cables
• Compatible with modern LTE frequency deployments, including lower-frequency cellular bands
• Ideal for EMC, wireless device testing and digital forensic environments

Applications

The STEUSB311 is designed for environments where high-speed USB communications must pass through a shielded enclosure without compromising RF containment. Typical applications include:

• RF shielded test enclosures
• EMC and compliance testing laboratories
• Wireless device development and validation
• Cellular, Wi-Fi and Bluetooth testing
• Digital forensic laboratories
• Secure device analysis environments
• Government and defence communications testing
• Research and development facilities
• Production and quality assurance testing systems

By maintaining both data throughput and RF shielding performance, the STEUSB311 enables reliable testing and analysis of wireless devices while preventing unwanted signal leakage or external interference.

Technical Overview

The Ramsey STEUSB311 combines high-speed USB 3.1 data transmission with advanced RF isolation technology to create a secure interface between equipment inside and outside an RF shielded enclosure. The interface is capable of maintaining SuperSpeed USB communications at up to 5 Gbps while delivering conductive insertion loss exceeding 90 dB across critical RF frequency ranges.

Unlike conventional filtered USB feedthroughs that can create shielding weaknesses, the STEUSB311 has been specifically engineered to preserve enclosure integrity in demanding test environments. The unit supports modern charging standards, automatically identifies charging requirements and provides integrated protection against connector wear through its reinforced port design and strain-relief system.

Whether deployed in a wireless testing laboratory, EMC facility or digital forensic investigation suite, the STEUSB311 provides a dependable solution for passing high-speed USB data while maintaining the RF isolation essential for accurate testing and secure operation.