TDR Cable Fault Locators

TDR (time-domain reflectometer) cable fault locators are electronic instruments that locate faults in metallic cables (such as a twisted wire). They use time-domain reflectometry (reflection of sound waves) to detect issues in cables. TDR cable fault locators are commonly used to locate issues in a connector, printed circuit board, or other electrical paths.

How do TDR cable fault locators work?

TDR cable fault locators work by measuring the reflection of waves along a conductor. In order to measure the reflections, the TDR will transmit a signal to the conductor and listen for any reflected sound waves as they return. If the conductor is operating correctly there will be no reflection displayed on the screen of the cable fault locator and the incident signal of the cable will be discharged. If there are reflections present, then the signal will be reflected back to the TDR fault locator and diagnosed for errors that will be displayed on the screen.

When are TDR cable fault locators used?

TDR cable fault locators are commonly used for in-place testing of very long cable, where the length of cable to be tested makes them impractical to remove.


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Description Price Best Accuracy Maximum Range Resolution Cable Type Maximum Pulse Width Minimum Pulse Width Pulse Amplitude Output Impedance Velocity Factor/Propagation Velocity Interface Type Battery Life Battery Type Dimensions Height
RS Stock No. 764-2834
Mfr. Part No.1002-227
BrandMegger
$2,044.90
Each
units
±1 % 5000m 1 % Metallic Cable Pair 2ns 4000ns 5V Pk-Pk 25 Ω, 50 Ω, 75 Ω, 100 Ω 0.99 - 14 h AA 115 x 48 x 230mm 230mm
RS Stock No. 764-2838
Mfr. Part No.TDR900
BrandMegger
$1,078.00
Each
units
- 3.7km 50 cm CATV Cable, LAN Cable, Power Cable, Telephone Cable 1100Hz 910Hz 5V Pk-Pk 100 Ω, 125 Ω, 150 Ω, 25 Ω, 50 Ω, 75 Ω 99.9% - 5000 tests AA 100 x 44 x 235mm 235mm
RS Stock No. 764-2828
Mfr. Part No.1001-789
BrandMegger
$3,307.70
Each
units
- 5000m 1 % Metallic Cable Pair 2ns 4000ns 5V Pk-Pk 100 Ω, 25 Ω, 50 Ω, 75 Ω 0.99 - 14 h AA 115 x 48 x 230mm 230mm
RS Stock No. 812-8929
Mfr. Part No.1007-063
BrandMegger
$8,011.30
Each
units
±1 % 20000m 1 % Metallic Cable Pair 2ns - - 100 Ω, 125 Ω, 25 Ω, 50 Ω, 75 Ω 0.99 USB 12 h Rechargeable Li-ion 290 x 55 x 190mm 190mm
RS Stock No. 764-2825
Mfr. Part No.1001-788
BrandMegger
$3,223.91
Each
units
- 5000m 1 % Metallic Cable Pair 2ns 4000ns 5V Pk-Pk 100 Ω, 25 Ω, 50 Ω, 75 Ω 0.99 - 14 h AA 115 x 48 x 230mm 230mm
RS Stock No. 181-5018
Mfr. Part No.1007-064
BrandMegger
$8,011.30
Each
units
±1 % 20000m 1 % Paired Metallic Cable 2ns - - 125Ω 0.2 → 0.99 USB 12 h Li-Ion 290 x 190 x 55mm 55mm
RS Stock No. 891-9772
Mfr. Part No.1007-077
BrandMegger
$8,959.50
Each
units
±1 % 20000m 1 % Paired Metallic Cable 2ns - - 25 Ω, 50 Ω, 75 Ω, 100 Ω, 125 Ω 0.2 → 0.99 - 12 h Rechargeable Li-ion 290 x 190 x 55mm 55mm
RS Stock No. 891-9769
Mfr. Part No.1005-021
BrandMegger
$9,806.50
Each
units
±1 % 20000m 1 % Paired Metallic Cable 2ns - - 25 Ω, 50 Ω, 75 Ω, 100 Ω, 125 Ω, 140 Ω 0.2 → 0.99 - 12 h Rechargeable Li-ion 290 x 190 x 55mm 55mm
RS Stock No. 181-5019
Mfr. Part No.1007-068
BrandMegger
$8,228.00
Each
units
±1 % 20000m 1 % Paired Metallic Cable 2ns - - 125Ω 0.2 → 0.99 USB 12 h Li-Ion 290 x 190 x 55mm 55mm
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