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Structured Cable Certification Tests


Structured Cabling or data cabling (also known Local Area Network or LAN Cabling) is increasing in its deployment for business, commercial and residential use to carry signaling for networks which use a data format to transmit information around the infrastructure of the building. This data network is normally installed to meet industry performance criteria identified under IEEE, TIA or ISO standards. These standards identify transmission rates to be achieved, allowing the network designer to ensure performance meets requirements. To determine these transmission rates, it is necessary to identify potential restricting conditions which are usually the result of inadequate installation material or techniques.


The following is a brief overview of the key parameters which need to be evaluated to certify low voltage structured cable installations. These parameters result in a fixed range of tests necessary to certify the installation to relevant standards. This paper will cover the following:
» Wiremap
» Length
» DC Loop Resistance
» Signal (Propagation) Delay
» Attenuation - Insertion Loss
» Near End Cross Talk - NEXT
» Attenuation to Crosstalk Ratio (ACR)
» Power Sum NEXT (PSNEXT)
» Return Loss
» Far End Crosstalk (FEXT)
» Equal Level Far End Crosstalk (ELFEXT)
» Power Sum Equal Level Crosstalk (PSELFEXT)
» Alien Crosstalk – AXT


Product specifications
The new Megger SCT2000 structured cable certifier has changed certification to Category 7 forever.

Offering you new levels of performance in many ways

Reliability, cutting down on retests
Easy to use, while running one test you can prepare the next one
Capability, 1 to 1000 MHz frequency range and exceeds proposed Level IV accuracy
For a century Megger has simplified electrical testing, now they’ve taken a look at structured cable certification.
(Range of test is determined by network or selected standard)
Cable Types
Shielded and Unshielded Twisted Pair (STP and UTP)LAN Cabling:
TIA Category 6, 5E, 5, 4 and 3: 100½
ISO/IEC Class F, E, D, and C: 100½
Foil-Screened Twisted Pair (ScTP):
TIA Category 6, 5E, 5 4 and 3: 100½ 
ISO/IEC Class F, E, D, and C: 100½
Multimode Fiber Optics Adapter IEC14763 Compliant.
Wave Lengths: 850/1300 nm
Singlemode Fiber Optic Adapter.
Wave Lengths: 1310/1550 nm
Test Standards
TIA Category 5E per TIA/EIA-568B
TIA Category 6 per TIA/EIA-568-B.2-1
ISO Class F per ISO/IEC 11081§
ISO Class E, D, C per ISO/IEC 11081
IEEE 802.3 10BASE-T, 100BASE-TX, 1000BASE-T
TSB140 Fiber Certification Testing
MM and SM
TIA 568B
ISO 11801
EN 50173

§SCT2000 only
Supported Tests
Frequency Measurements
NEXT; Power Sum NEXT (PSNEXT); Equal Level Far-End Cross
Talk (ELFEXT); Power Sum ELFEXT (PSELFEXT); Insertion Loss;
Return Loss; Attenuation-to-Cross Talk Ratio (ACR);
Power Sum ACR (PSACR); Impedance.
Single Point Measurements
Delay; Delay Skew; Length; Wire Map; d.c. Resistance
Diagnostic Measurements
WireMap vs. Length; NEXT vs. Length; Return Loss vs. Length
1/4 VGA color display.
Input Protection
Protected against all continuous telco voltages, 100 mA overcurrent, and ISDN over-voltages.
High impact plastic with shock absorbing over-mould.
Main unit and smart remote including link interface adapter:
22.7 cm x 12.7 cm x 6.3 cm (9” x 5” x 2.5”)
Main unit: 1.2 kg (2 lbs., 11 oz)
Smart remote: 1.2 kg (2 lbs., 11 oz)
Primary and Secondary instruments:
Rechargeable NiMH battery 7.2V, 4000 mAH 
Typical battery life 10 hours, with recharge time of 6 hours
May be charged while in the instrument (instrument powered down)
Service center calibration period is 1 year.

NEW Megger SCT2000 Structured Cable Tester

It is simply the most intuitive and easy-to-operate LAN certification tester on the market today!

That alone makes it a tester to try. Now, add all of these other impressive features:

  • » 1 to 1,000 MHz frequency range. Certifies twisted pair to all approved ISO and TIA standards, including ISO Class F.
  • » Exceeds Level III and proposed Level IV accuracy specifications.
  • » Improved result reporting displays all data in easy to read summary, detailed and graphical formats.
  • » Powerful diagnostics locate link disturbances on each pair, displaying the size and distance to the disturbances in a straightforward manner, speeding link failure recovery.
  • » Unique “connector-less” recessed copper and fiber optic adapters eliminate virtually all potential adapter or tester damage…keeping your SCT on the job.
  • » Powerful SQL based certification management software allows quick organization, editing, viewing, printing, saving or archiving test results by job site, customer, campus building and more.

SCT Series

Structured Cable Testers

  • » Certifies Category 7, 6 and 5e cabling
  • » Exceeds Level IV Accuracy
  • » 1 to 1000 MHz frequency range
  • » Unique patented connectorless modules improve reliability and productivity in the field
  • » Most intuitive and easy to operate LAN certification tester on the market
  • » Powerful diagnostics pinpoint the distance to link disturbances on each measured pair
  • » Best return on your investment given low operating costs and superior reliability


The SCT Series is a range of high-performance testers for certifying and evaluating copper and fiber cabling installations. The SCT Series are unmatched for flexibility with improved device features including 1/4 VGA color display, USB & serial ports; compact flash, secure digital, multimedia card storage, unit-to-unit audio and 64 Mb of internal memory.

Designed for cable installers and network owners who need to certify the performance of high-speed cabling to today’s industry standards and tomorrow’s emerging standards, the SCT Series delivers unmatched performance and accuracy. Whether certifying cabling installations, troubleshooting problems, migrating to a high-speed network, or re-certifying after add-ins, moves or expansions, the SCT Series exceeds expectations.

Features and Benefits

  • » The SCT Series certifies twisted pair to all approved ISO and TIA standards, including ISO Class F. Frequency range of 1 to 1000 Mhz (1Ghz) exceeds ISO Class F by 400 Mhz and meets TIA Category 6a* requirements. Meets Level III and proposed Level IV accuracy requirements.
  • » The SCT1500 certifies twisted pair to approved ISO and TIA standards, including ISO Class E on TIA Cat 6 of 1 to 350 MHz. Meets Level III and proposed Level IV accuracy requirements.
  • » Most intuitive, organized and easy-to-operate tester. Testing, test parameter management, result management, and options management are organized according to their function. In addition test parameters such as project name, test type, cable type and circuit ID are organized by individual project virtually eliminating certification mistakes.
  • » Save test time by selecting or modifying the Circuit Identification number during a test.
  • » Optimizes certification testing by displaying all certification test parameters, conducting tests, displaying results and saving either numeric or graphic results from a single menu, eliminating the need to navigate multiple menus in order to certify.
  • » Improved result analysis by displaying results in multiple formats. Certification results are displayed in summary form showing overall link performance, detailed form showing each pair’s measurement result for link performance analysis or graphical showing every measured data point for visual link performance analysis.
  • » Selectable link diagnostics from the test menu for quickly identifying the distance to the source of a link fault.
  • » Powerful link diagnostic results displayed in multiple formats to speed link fault correction. Diagnostic TD NEXT and TD Return Loss results are displayed in summary form quickly identifying distance to the greatest disturbance, detailed form showing each pair’s diagnostic result for quickly identifying distance to component disturbances or graphical showing all disturbances on all pairs for visual link diagnostic analysis.

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