RFOptic’s high-frequency Altimeter Optical Delay Line (ALT ODL) provides a high-performance solution for testing and calibration of radar altimeter systems. The Altimeter RADAR Test solution is offered in a progressive configuration where a series of fiber delay segments can be added in ascending sequence to deliver a wide range of highly accurate height or range simulation. It offers very high accuracy, better than 0.3ft (10cm) in the smallest altitude segments, those shorter than 6ft and less than 1% for the higher altitude segments. The maximum altitude can reach 100,000 feet or 30 km in one enclosure. It can be configured to emulate a single altitude or more than 4,096 altitude steps (12 bits) with a minimum step of 0.5ft (15cm).

Key Features

  • Customizable Altitude range from 1 to 100,000 feet
  • Supports frequencies from 0.5MHz up to 6GHz
  • Display Delay, Round-trip Distance, Range, or Altitude in meters or feet.
  • Customizable altitude steps
  • Supports any waveform and modulation scheme including Pulse and FMCW
  • Customized Delay accuracy
  • Customized solution but with short delivery time
  • High Dynamic Range
  • Excellent Phase Noise
  • USB or REST API for automated test


  • RF and Optical bypass
  • DC Power
  • External Delay
  • Amplitude Control
  • Optical Power Meter
  • Built-in diagnostics
  • Target simulator


  • Managed remotely by software or manually via a navigation switch


  • Radar Calibration Testing
  • Altimeter RADAR Testing


To find a distributor In your area, visit the Contact Us page.
Click on the relevant orange dot on the map, which will show the local RFOptic distributor’s contact details. For our North American subsidiary, click on the blue dot on the US map. The other blue dot shows our HQ. For a list of RFOptic’s distributors, you can click here.