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 Cable Type Minimum Pulse Width Pulse Amplitude Output Impedance Velocity Factor/Propagation Velocity Interface Type Battery Life Battery Type Dimensions Height Length Minimum Operating Temperature
RS Stock No. 764-2825
Mfr. Part No.1001-788
BrandMegger
$3,468.25
Each
units
- 5000m Metallic Cable Pair 4000ns 5V Pk-Pk 100 Ω, 25 Ω, 50 Ω, 75 Ω 0.99 - 14 h AA 115 x 48 x 230mm 230mm 115mm -15°C
RS Stock No. 764-2834
Mfr. Part No.1002-227
BrandMegger
$1,995.71
Each
units
±1 % 5000m Metallic Cable Pair 4000ns 5V Pk-Pk 25 Ω, 50 Ω, 75 Ω, 100 Ω 0.99 - 14 h AA 115 x 48 x 230mm 230mm 115mm 15°C
RS Stock No. 764-2828
Mfr. Part No.1001-789
BrandMegger
$3,502.00
Each
units
- 5000m Metallic Cable Pair 4000ns 5V Pk-Pk 100 Ω, 25 Ω, 50 Ω, 75 Ω 0.99 - 14 h AA 115 x 48 x 230mm 230mm 115mm -15°C
RS Stock No. 812-8929
Mfr. Part No.1007-063
BrandMegger
$8,490.00
Each
units
±1 % 20000m Metallic Cable Pair - - 100 Ω, 125 Ω, 25 Ω, 50 Ω, 75 Ω 0.99 USB 12 h Rechargeable Li-ion 290 x 55 x 190mm 190mm 290mm -15°C
RS Stock No. 181-5019
Mfr. Part No.1007-068
BrandMegger
$8,712.00
Each
units
±1 % 20000m Paired Metallic Cable - - 125Ω 0.2 → 0.99 USB 12 h Li-Ion 290 x 190 x 55mm 55mm 290mm -15°C
RS Stock No. 891-9769
Mfr. Part No.1005-021
BrandMegger
$10,541.79
Each
units
±1 % 20000m Paired Metallic Cable - - 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 290mm -15°C
RS Stock No. 891-9772
Mfr. Part No.1007-077
BrandMegger
$9,497.00
Each
units
±1 % 20000m Paired Metallic Cable - - 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 290mm -15°C
RS Stock No. 181-5018
Mfr. Part No.1007-064
BrandMegger
$8,490.00
Each
units
±1 % 20000m Paired Metallic Cable - - 125Ω 0.2 → 0.99 USB 12 h Li-Ion 290 x 190 x 55mm 55mm 290mm -15°C
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