How does a certification tester report channel performance?

• A. It prints only the cable length
• B. It generates pass/fail results and detailed test values for parameters like NEXT, ELFEXT, and return loss, compared to the category standard
• C. It shows only pass/fail with no values
• D. It reports only shielding integrity

Answer: (B)

Certification testers assess channel performance by measuring a range of electrical parameters and checking them against the category standard. The best choice reflects that the tester outputs both a pass/fail verdict and the actual measured values for key specs such as NEXT, ELFEXT, and return loss, all in relation to the defined limits of the category. This combination gives a clear yes/no result while also providing the numerical data needed to verify compliance and diagnose any issues. Printing only cable length misses the performance aspects, while showing only pass/fail with no values lacks traceability, and reporting only shielding integrity ignores the full set of channel performance metrics used in certification.