Two men setup TCI Model 903S, a compact, man-portable communications intelligence (COMINT) and direction finding (DF) system


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The TCI Model 903S is a compact, man-portable Communications Intelligence (COMINT) and direction finding (DF) system which is designed for two-man carry, mobile and transportable applications.

The 903S searches, detects, intercepts, identifies, locates or localizes sources of all intentional and unintentional RF energy — and simultaneously DFs all signals in the bands of interest using fast-stepping wideband receivers combined with DSP-based frequency channelization. Interlinked fast scanning detection/DF displays combined with powerful signal isolation capabilities enable real-time and post facto detection and DF of modern signals, including frequency-agile signals.

The 903S system is typically configured with the TCI Model 649-8 high-performance, lightweight antenna array.

• Rugged design and low size, weight and power consumption suitable for portable applications.
• Comprehensive intercept and location of all signals from 20 to 8,000 MHz.
• Optional intercept of HF signals down to 100 kHz.
• 3 GHz/sec fast-scanning detection with simultaneous DF of all detected signals at frequency channelization of 25 kHz (DF First™ technology).
• Analyze and geolocate multiple signals of interest from data collected in a dense signal environment.
• Capable of networked multi-site geolocation of emitters of interest.
• Display spectral and DF reports collected by the real-time system.
• "Lookback Collection" and analysis of signals of interest post-mission.
• Azimuth-colored spectrogram, map with bearing rays from sensors and detection metadata displays.
• Selectable wideband 4/40 MHz (in VHF/UHF band) instantaneous bandwidth.
• Wideband recording with selectable bandwidth up to 40 MHz.
• Built in solid state drive can perform wideband recording up to 4 hours at 4 MHz.
• Detection and DF of conventional and modern signals.
• Client-server architecture with full networking capability.
• Built-in self-test (BIST) and calibration.
• Modular, compact, industry-standard architecture supports flexible implementation in man-portable, mobile, fixed, and transportable configurations.
• Optional signal modulation recognition.
• Optional signal analysis and decode suite available with over 200 signal types.
Please select your country on the map below to contact the business development representative for your region.

US, European and Israeli customers requesting information on COMINT and Drone Detection systems, please contact Ray Blakeman.

Please click here to submit an HF antenna inquiry. All other antenna inquiries should contact their regional business development manager based on the map below.