The SIT434CI is engineered for military-grade identification and surveillance, integrating monopulse interrogation with dual transmitter support for full Mode S operation. It processes replies using digital plot extraction and friend evaluation, ensuring high accuracy and reliability in target identification. Enhanced surveillance is supported through target-specific interrogations, automatic lockout features based on SI/II codes, and UTC-based time tagging. The system supports multiple interrogation scheduling options, including continuous, multi-sector, and specific target modes—making it suitable for high-tempo and dynamic operational environments.

Packaged in a compact, rugged single Line Replaceable Unit (LRU), the SIT434CI supports both Ethernet and MIL-STD-1553B data bus interfaces. It can be hard-mounted or installed with an optional tray featuring an internal cooling fan. The interrogator offers high reliability with MTBFs ranging from 1,200 hours (airborne rotary wing) to 3,700 hours (sheltered naval or airborne cargo), and features a built-in diagnostics suite for fault detection and isolation. Its antenna options—whether integrated into existing radar systems or mounted independently—provide adaptability across diverse platforms. With full compliance to STANAG 4193, MIL-STD-810E, and MIL-STD-461C, the SIT434CI stands as a mission-proven, future-ready IFF solution.