The SIT434CI is one of a family of IFF Mk XA and National Secure Mode (NSM) and Mode S interrogators developed under the multinational New-Generation IFF (NGIFF) programme in order to provide a state-of-the-art IFF interrogation capability

Military identification is available with Mode 4-like NSM, supported by an external cryptographic computer. Mode S is also provided in order to monitor civilian air traffic to support Situational Awareness.

The SIT434CI has been designed for airborne applications, surveillance on fixed wing maritime patrol aircraft or Airborne Rotary Wing (ARW), together with medium-range and long range naval and ground systems.

The interrogator is packaged in a rugged single LRU, intended for hard mounting with forced air cooling. It may alternatively be installed on a mounting tray with an integral fan to provide the forced air cooling drawn from ambient air. Integration with the platform is available via an Ethernet or MIL-STD-1553B data bus.

Main Features
  • Full IFF Mk XA + NSM, Mode S
  • Enhanced surveillance Mode S operation with dual transmitter
  • Monopulse interrogations and reply processing
  • Digital plot extractor and friend evaluator
  • System Interface through Ethernet or MIL-STD-1553B data bus
  • Plot streaming over Ethernet
  • Target specific interrogations
  • Intermode with short P4
  • Automatic lockout of transponders based on SI/II codes
  • Flexible target reporting options
  • Ethernet: X, Y (Absolute); Range, Bearing (Absolute); Range, Bearing (Relative)
  • MIL-STD-1553B: X, Y (Absolute)
  • Target time tag in UTC when controlled from Ethernet
  • Target time tag in bus time when controlled from MIL-STD-1553B data bus
  • Suppression In/Out in accordance with STANAG 4193


Contatti Sistemi Airborne
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