Spectrum Monitoring & Management Systems
Broadcast & Communication Antennas
Communication Intelligence
Direction Finding Systems

Model 9091 Wideband HFDF System

The TCI Model 9091 Wideband HF Signal Acquisition and DF Processor is  a  field  proven  system solution for HF COMINT/DF (Communications Intelligence/Direction Finding) applications. The system is based on an open and flexible client/server architecture that provides a complete set of tools needed to carry out HF radio surveillance. The objective of the system is to rapidly acquire and  describe any signal activity, including both traditional and  modern  HF  signals,  and  subsequently  perform  detailed  analysis of specific signals of  interest.  The  TCI Model 9091 can carry out this analysis in real-time or in delayed (post-facto) mode, and in both modes analysis can be performed manually or automatically. The analysis includes detection, location, collection, classification and archiving of signal activities.


  • N-channel technology – one receiver channel per antenna element
  • The N-channel architecture enables operation through deep fades (common in HF) to detect and DF HF burst and frequency hopping signals
  • 2 MHz instantaneous bandwidth with high instantaneous dynamic range and frequency selectivity
  • TCI DF First™ technology produces high-speed simultaneous new-signal detection and direction finding.
  • TCI DF First™ technology provides optimum signal processing performance, regardless of signal types or signal propagation conditions