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Lexxi T1660 TDR Time Domain Reflectometer

Use Radiodetection T1660 Time Domain Reflectometer (TDR) to trace faults on telecom, CATV, twisted pair telecom, ethernet & even LV power cables. It‘s simple to use, with just 6 control buttons & an easy to follow menu to set your preferences.

Part Number:

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Manufacturer's RRP

974.40 incl. VAT)
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Radiodetection Lexxi T1660 TDR or Cable Radar

The Radiodetection Lexxi T1660 Time Domain Reflectometer has been designed for First Responders / Cable Testers to perform analysis on all metallic cables which consist of at least two metallic elements; use it to accurately trace faults on telecom, CATV, twisted pair telecom, ethernet and even LV power cables. 

The Lexxi T1660 1% distance accuracy and resolution gives technicians the tool they need to find faults quickly and accurately.


How does the Lexxi T1660 work?

Electrical pulses are transmitted into a cable, and a portion of the pulse energy is reflected back from cable imperfections. These can be discontinuities (eg cable joints, changes in cable type or the far end of the cable under test) or faults (typically short circuits, open circuits, or high resistance joints). The transmitted pulse and the reflected pulse(s) are shown on the display. The time taken by the pulse to travel to the imperfection and back is a measure of the distance to the fault. The distance is displayed after the cursor is positioned at the start of the reflected pulse. The type of imperfection can be assessed by analysing the displayed waveform.


Radiodetection Lexxi T1660 Key Features:

  • Great value that allows more technicians to be equipped
  • Large, easy read colour display - simply fault locating in most conditions
  • 1% fault location accuracy
  • 0.5m dead zone
  • 6km, 19000’ maximum range
  • 7m, 23’ minimum display range
  • 11 range settings
  • 12 hours typical battery life time (alkaline)
  • User selectable Power Down time
  • Selectable cable impedance
  • VoP adjustable from 1% to 99% (Velocity of Propagation)
  • Optional modules, including Category IV mains Blocking Filter for twisted pair, coaxial and power cable


What comes with the Lexxi T1660?

  • Radiodetection Lexxi T1660 Time Domain Reflectometer
  • 100Ω Twisted Pair Alligator Clip cables
  • T1160 Carrying Bag



Technical Specification for: Radiodetection Lexxi T1660 TDR Time Domain Reflectometer

Ranges7, 15, 30, 60, 120, 250, 500, 1000, 2000, 3000, 6000 Meters
20, 50, 100, 200, 400, 800, 1600, 3200, 9400, 10000, 20000 Feet
Range SelectionManual range control
Accuracy1% of selected range*
Display328 x 256 pixel 3.5” colour backlit LCD
ResolutionApprox 1% of range
Velocity Factor, VoPAdjustable from 1% to 99%
Output Pulse5V peak to peak (Into open circuit)
Output ImpedanceSelectable 25, 50, 75 & 100 ohms
Output Pulse Width3ns to 3ms (Automatic with range)
Scan Rate2 scans/second
BatteriesSix AA (LR6/R6) Alkaline or NiMH cells
Battery Life12 hours typical, continuous operation
Voltage Protection600V AC Category III, 300V AC Category IV 250V AC
Power DownSelectable 1, 3, 5, 10, 15 minutes or disabled
Operating Temp-10 to 50°C.
Storage Temp-20 to 70°C.
Dimensions250 x 100x 55mm
StandardsEMC BS/EN 61326-1
Water/Dust ProofIP54
*assumes accurate setting of VoP, homogeneity of VoP along the length of the cable & accurate cursor positioning.
Product Downloads


Accessory Code Description Price (Ex VAT)
10/T1660-BLOCK-MOD T1660 Mains Blocking Filter 25 OHM CAT IV £194.00 ADD
10/T1660-TP-CROC-MOD-50 50 OHM Twisted Pair Plug-In Croc Clip £48.00 ADD
10/T1660-TP-CROC-MOD-100 100 OHM Twisted Pair Plug-In Croc Clip £48.00 ADD
10/T1660-BNC-MOD-75 75 OHM BNC Plug-In BNC-F Adapter £48.00 ADD