IFF/SSR & Mode S Basics

Technology Training

Course ID: IFF-ModeS-000-01

1 Day

Max. 12



  • State the basic techniques of Secondary Surveillance Radars (SSR)
  • Recognise the problem of FRUIT and Garbling
  • Consider the advantages of Mode S
  • Differentiate between Mode S Acquisition and Lockout strategies
  • Characterise the different Uplink and Downlink Formats

Course Information

Target Group

Project Manager - Engineers - Technicians - Operator and Employees working in the field of radar technology and IFF/SSR Data-Link


Participants must have basic knowledge in radar technology


  • Introduction to Mk X and sliding window principle
  • Introduction Mode S and monopulse principle
  • Advantages of Mode S compared to Mk X
  • Interrogation and Reply signals
  • Interrogator Code allocation
  • Mode S Acquisition and Lockout strategies
  • Combined operation of Mode S and Mk X
  • Roll-Call scheduling and Power Management
  • Uplink and Downlink Formats
  • Introduction to ADS-B / Mode S Squitter



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