Rohde & Schwarz R&S M3SR Series 4400 Software Defined Radios

At a glance

The R&S M3SR Series 4400 software defined radio family is designed for stationary civil and military secure voice and data communications, offering high modularity and outstanding specifications. These radios provide continuous AM and FM transmission coverage from 100 MHz to 512 MHz, meeting international civil air traffic control guidelines and military UHF communications requirements.

Key features include:

• Extended frequency range from 100 MHz to 512 MHz.
• Output power up to 100 W for increased performance with EPM (ECCM) waveforms.
• TCP/IP-based interfaces for remote control, voice over IP (VoIP), and service/maintenance.
• Simple Network Management Protocol (SNMP) for monitoring and remote control applications.
• Continuous transmission at temperatures up to +55°C.
• Interfaces for external cipher units and modems.

Benefits and key features

Secure communications

• NATO and proprietary EPM (ECCM) waveforms.
• Optional 70 MHz up-/downconverter for external modems.
• Methods for secure data transmission over TDMA-based radio networks (optional).
• Interface for external encryption devices.
• Remote key loading.
• Support for various LINK methods (e.g., LINK11, LINK22).

Ease of operation

• Intuitive graphical user interface (GUI).
• Password-protected access.
• Plain-text status and warning messages.
• Automatic remote control access management.

Flexible range of applications

• Software defined radio concept allowing software loading for functional enhancements.
• Highly modular design enabling scalable radios and shorter repair times.
• Optional VoIP interface for IP-based communications systems compliant with EUROCAE ED-137.
• Flexibility in voltage source selection (multirange AC power supply, direct DC input).

Unrivaled radio parameters

• Excellent RF characteristics with high signal purity.
• Robust design for unfavorable RF conditions, including high VSWR and strong receive levels.
• Optional integratable UHF circulator with VHF bypass for improved intermodulation rejection.
• Optional frequency agile pre-/postselector for interference-free operation.
• 70 MHz wideband interface for modem applications.

Flexible and safe investment for the future

• Hardware and software upgrades for adapting to changing requirements.
• Integrated in the NATO logistics structure with NATO stock numbers (NSNs).
• Low lifecycle costs due to user-friendly GUI, fast repairs, reliable components, and efficient cooling.

Low maintenance

• IP-based maintenance tool (R&S ZS4400) supporting radio cloning.
• Powerful built-in test (BIT) functions (PBIT, CBIT, IBIT).
• No tuning of RF modules required.
• High reliability due to decades of experience in RF applications and robust design.

Radios in a mobile ATC tower

The R&S M3SR Series 4400 is suitable for mobile military and civil ATC tower solutions, even in demanding RF environments. It can be fully operated via IP with R&S VCS-4G and R&S GB4000C remote control units, integrating IP telephones and voice recorders.

A typical ground/air/ground communications solution involves multiple R&S M3SR Series 4400 radios, antennas, filter units, and control units like the R&S GB4000C and R&S GB5400.

Remote control and monitoring of radios

The R&S RCMS II system provides centralized and decentralized remote control and monitoring of Rohde & Schwarz radios across nationwide systems. It allows operators to respond to errors, configure parameters, and monitor radio status through tree and map views. Data export is available for statistical analysis.

High data rate network solutions

The R&S M3SR Series 4400 supports high data rates (HDR) through its optional R&S UX4401 70 MHz IF converter interface, enabling connection to commercial data modems. This facilitates various maritime and ground-based applications, including data communications between multiple nodes in maritime networks.

Voice over internet protocol (VoIP)

The radios offer a VoIP interface compliant with the EUROCAE ED-137 standard, allowing for IP-based communications systems. This simplifies connections and enables redundancy. The R&S M3SR Series 4400 can be used with the R&S VCS-4G voice communications system for scalable, cost-effective solutions supporting air-to-ground, intercom, and telephony services.

The R&S GB4000C remote control unit and R&S GB4000V audio unit can be paired for automatic VoIP link establishment, ideal for small systems in shelters or on ships.

Front and rear view of the R&S M3SR Series 4400 radio

Front View: Volume control, Control unit, Fillgun, Indicators, Ethernet LAN interface, Headset connector, Function keys and power on/off.

Rear View: Antenna connector, Software-controlled fans, Ground connector, Interface expansion slots, Serial interfaces, Ethernet LAN, VoIP and remote control interface, Software-configurable interfaces, DC output, DC battery input, DC input, Reference frequency input and output, External filter and power amplifier interfaces, Audio interfaces.

Options

The R&S M3SR Series 4400 offers a range of retrofittable hardware and software options, including:

• Software Options: R&S DS4400A-U (LINK11/LINKY), R&S DS4400J-U (HAVE QUICK I/II), R&S DS4400M-U (SATURN), R&S DS4400L-U (R&S SECOS 5/16 TDMA).
• Hardware Options: R&S FD4430-U (frequency agile UHF pre-/postselector), R&S ET4400G-U (guard receiver), R&S UX4401-U (70 MHz IF converter interface), R&S GI4403-U (antenna interface upgrade), R&S GI4405-U (main receiver antenna switch).
• Cross-functional Options: R&S GS4400TD (TDMA support), R&S GS4400SP (SPC interface support), R&S GS4400VP (VoIP support), R&S GS4400MT (multitone modem support).

These options are managed and activated using the R&S ZS4400 service and maintenance tool.

Product overview

The R&S M3SR Series 4400 is available in various configurations:

• Transceiver with fixed frequency functionality: Models like R&S XT4410A and R&S XT4460A, with options for guard receivers and UHF circulators.
• Transceiver with HAVE QUICK I/II; R&S SECOS functionality: Model R&S XT4410E.
• Transceiver with R&S SECOS functionality: Models R&S XT4410L and R&S XT4460L, including TDMA support.
• Transceiver with HAVE QUICK I/II functionality: Models R&S XT4410J and R&S XT4460J, with LINK support.
• Transceiver with SATURN/HAVE QUICK I/II functionality: Model R&S XT4410M, with options for UHF circulators.

Accessories

Includes mating connector sets, power supplies (R&S IN4000A), remote control units (R&S GB4000C), audio accessories (R&S GB4000V, headsets, handsets), mechanical accessories (protective plates, portable cases), and service/maintenance tools (R&S ZS4400).

Radio test equipment

Base system R&S UCS226XB and system interface base R&S UCS-B10.

R&S GT4031 timing system

SecureSync timing system with Rubidium standard.

R&S Fx221 and R&S Fx213 VHF/UHF filters and multicouplers

Includes multichannel automatic filters and multicouplers (R&S Fx221 series) and filters with bypass for guard receivers (R&S Fx213A/214A series) for UHF and VHF bands.

Service that adds value

Rohde & Schwarz offers worldwide, local, personalized, customized, flexible, and uncompromising quality service for long-term dependability. The company provides innovative solutions in test and measurement, broadcast and media, secure communications, cybersecurity, monitoring, and network testing.

Sustainable product design: Focuses on environmental compatibility, eco-footprint, energy efficiency, low emissions, longevity, and optimized total cost of ownership.

Certified Quality Management: ISO9001, AQAP-2110.

Certified Environmental Management: ISO14001.