Distance measuring equipment or DME is really a transponder-based radio navigation technology that calculates distance by timing the propagation delay of VHF or UHF radio signals.
DME is identical to secondary radar, with the exception of reverse. The system had been a post-war progression of the IFF (identification friend or foe) programs of World War II. To keep up compatibility, DME is functionally similar to the distance measuring element of TACAN.
Airplanes use DME to find out their distance from a land-based transponder by transmitting and acquiring pulse pairs - two pulses of fixed duration and separation. The ground stations are typically co-located with VORs. A normal DME ground transponder system for en-route or terminal navigation should have a 1 kW peak pulse output on the assigned UHF channel.
CCX Technologies T-RX RP+ Transponder/ADS-B, NAV/COMM, ARINC 429, multifunction Test Set - Part Number: T-RX RP+
TIC TR420 Ramp Test Set Part Number: TR-420
TIC Tel-Instruments TR-220 Multifunction Transponder TCAS DME ADS-B Test Set Part Number: 90000088
IFR / Aeroflex ATC1400A / ATC-1400A-2 DME/Transponder Test Set - Part Number: ATC-1400A
IFR/Aeroflex ATC600A-2 DME/Transponder Test Set Part Number: ATC-600A-2
IFR/AEROFLEX ATC600A-1 DME/Transponder Test Set Part Number: ATC-600A-1
IFR Aeroflex ATC-600A DME/Transponder Test Set Part Number: ATC-600A
Sun Avionics AV-15 NAV/COMM/Transponder/ADS-B Avionics Ramp Tester - Part Number: AV-15
Sun Avionics AV-10 Transponder DEM VOR ILS GS TESTER - Part Number: AV-10
Tel Instruments (TIC) T24B DME Test Set Part Number: T-24B
Rockwell Collins CTS-351 DME Tester - Part Number: 622-3883-001
LinAire L720 DME Test Panel - Part Number L-720
BF Goodrich/JC Air 331 DME Check 1 Test Set Part Number: 331
Rockwell Collins CTS-451 622-3882-001 DME Tester - Part Number: 622-3882-001
ASI (Avionics Specialists) ASI-182 DME Test Panel - Part Number: ASI-182
IFR Aeroflex ATB 7300 Avionics Test Bench Part Number: ATB-7300
IFR/Aeroflex ATC1200Y2 Bench Test Set Part Number: ATC-1200Y2
IFR Aeroflex ATC-1200Y3 DME/Transponder Test Set Part Number: ATC-1200Y3
IFR Aeroflex ATC-1400 DME/Transponder Test Set Part Number: ATC-1400
IFR / Aeroflex ATC1400R DME/Transponder Test Set Part Number: ATC-1400R
IFR / Aeroflex ATC-5000NG Mode A/C/S Transponder Test Set - Part Number: ATC-5000NG
IFR / Aeroflex ATC600 DME/Transponder Test Set - Part Number: ATC-600
IFR Aeroflex IFR-6015 Military Flightline Test Set Part Number: IFR-6015
IFR Aeroflex SDX2000 Transponder/Interrogator/DME Test Set Part Number: SDX 2000
Tel-Instruments (TIC) DME Testers - Part Number: T-24A
Tel-Instruments TIC T47C Transponder IFF/TACAN/DME Test Set Part Number: T-47C
TIC T47G XPDR IFF TACAN DME TCAS Ramp Tester Part Number: T-47G
TIC T47NC / T47NH Ramp Test Set Part Number: T-47NC/NH
Tel-Instruments (TIC) T48D Mode S Transponder / DME Test - Part Number: T-48D
TIC Tel-Instruments TB-2100 ATC/DME/MODE S Test Set Part Number: TB-2100
Tel-Instruments (TIC) TR210 ATC/DME TEST SET Part Number: TR-210