TR-420 Ramp Test Set

. Posted in Products - Military Avionics



The TR-420 (Multi-function including Mode 5) Ramp Test Set is the next generation of avionics support equipment. The TR-420 is a battery powered portable unit used to test the operation of Transponders and Interrogators including: IFF (with Mode 5) Mode S Transponders, EHS, and ADS-B. TACAN/DME, ADS-B Transmit/Receive and TCAS testing functionality are also offered as part of the standard test set capability. Tests of both Transponders and Interrogators can be performed by using the TR-420 hand held antenna to radiate to and from the unit-under-test (UUT) or by directly connecting to the UUT antenna port. The TR-420 employs a user interface with a large 5.7 in. color LCD screen and surrounding soft-keys. This allows for easy and quick access to a multiple of test screens menus and display options.

NSN 6625-01-570-9588

The TR-420 can be factory upgraded to the AN/USM-708.

EXPORT CONTROL WARNING: This product is controlled for export under the International Traffic in Arms Regulations (ITAR). A license from the U.S. Department of State is required prior to the export of this product from the United States. 


  • IFF (including Mode 5)
  • Mode S, EHS, ADS-B
  • Built in GPS provides Accurate Date, TOD and LAT/LONG for positioning
  • Battery provides hours of constant operation
  • Large 5.7 in. color LCD screen, soft-keys and keyboard
  • Rugged and durable MIL-PRF-28800F, Class 1 package
  • Remote Software/Firmware upgrades
  • MILSPEC Tested and Approved

Photo Gallery for the TR-420

Data Sheets

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Data Sheet       pdf buttonTR-420 Test Set

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