We offer two industry-leading brands – Comtech EF Data and Radyne – and the widest range of bandwidth-efficient Modems in the satellite industry. Our award-winning Modems use technologically advanced components, innovative designs and application software for superior performance and features. Whether used to support satellite-based mobile backhaul, to enable broadcast transmissions, to power mission-critical military communications, or to connect remote offices, our innovative technologies offer the performance, flexibility, security and control you require. We offer indoor modems, outdoor / ruggedized modems and card- based modems for a variety of integration choices.

Our Modems support traditional and advanced methods of forward error correction to improve performance of error-prone channels. Examples of our FECs are:

• VersaFEC® – Patented system of high performance, short-block, low-latency LDPC codes; provides excellent coding gain with lowest possible latency
• DVB-S2 – Provides near Shannon Limit performance over a wide operating range
• Low Density Parity Check Coding – Enables near Shannon limit performance and additional coding gain
• 2nd Generation Turbo Product Coding – Offers much lower delay than legacy FECs

We have both ASIC and FPGA modulator and demodulator designs with a range of modulation techniques, including BPSK, QPSK, OQPSK, 8-PSK, 16-APSK, 32-APSK, 8-QAM, 16-QAM and 64-QAM. The combination of advanced FEC and higher order modulation provides increased coding gain, lower decoding delay, plus significant bandwidth and power savings.

Our award-winning DoubleTalk Carrier-in-Carrier is based on Applied Signal Technology's patented "Adaptive Cancellation" technology that allows transmit and receive carriers of a duplex link to share the same transponder space. When combined with our advanced FEC and modulation, DoubleTalk Carrier-in-Carrier delivers unprecedented savings in transponder bandwidth and power utilization. Therefore, this revolutionary technology can be successfully deployed in both bandwidth-limited and power-limited scenarios. In addition, this technology reduces earth station BUC/HPA power requirements allowing the use of a smaller BUC/HPA and/or antenna.

Rain fade, inclined orbit satellite operation, antenna pointing errors, noise and interference can all degrade satellite link conditions. These conditions determine the overall link margin of a system. When utilizing ACM operation in our Modems, link margin can be converted into increased throughput of satellite links. The greater the link margin, the more your links can benefit from ACM.

Modems with our integrated router functionality allow seamless network convergence for data, voice and video traffic. Available options include header compression, payload compression, ultra low overhead streamline encapsulation and Quality of Service (QoS). When utilizing the advanced IP functionality, real-time traffic and other low priority traffic can seamlessly coexist on the same link without impacting the voice quality or delivery of mission critical data. The functions provide high bandwidth efficiency, information security and simplified network design and configuration.

Modems featuring RAN optimization can significantly reduce the wide area network (satellite) bandwidth required to carry an E1 bearer used for mobile backhaul. RAN optimization allows users to control the desired level of optimization and link quality.

To support your mission-critical applications, we offer 1:1 and 1:N redundancy solutions. Options include external switch compatibility and on-board, built-in redundancy with either fully automatic or manual switching operations.

Our modems enable deployment in remote and hub environments; we offer L-Band ,70/140 MHz and combination L-Band & 70/140 MHz systems. We offer both indoor and outdoor modems with data rate ranges from 2.4 kbps to 238 Mbps. We provide the options you need for operation with single or multiple transponders, and configurations to accommodate Low Noise Block Converters and Block Up Converters. Our product line includes open and closed network Modems, and support for a variety of management and control methods. A wide range of data interfaces are available to support low- and high-speed data transmission.

We offer modems ideally suited for military and government applications, engineered to meet a range of standards, including:

• MIL-STD-188-165A
• AES-256 TRANSEC / FIPS-140-2 Level 2 NIST
• DISA Certified for operation on Wideband Global Satcom (WGS) and Defense Satellite Communications System (DSCS) satellite networks

To enhance the functionality of our Modems, we offer a variety of accessories, including 1:1 and M:N redundancy switches, interface converters, IP-enabled monitor & control interfaces, and more.