What is a quality test of a transmission line called?

• A. A sweep
• B. TDR check
• C. Continuity test
• D. Quality check

Answer: (A)

Evaluating a transmission line’s performance across a range of frequencies is what a sweep test does. By sweeping through the operating band and measuring how the line responds, you can see how much signal is lost (insertion loss), how well it’s impedance-matched, and whether there are reflections from discontinuities. This provides a practical view of the line’s quality across the frequencies it’s meant to carry. A TDR check uses a fast pulse to locate faults along the line by time-domain reflections, which is great for pinpointing where something is wrong but doesn’t give the full frequency-dependent quality picture. A continuity test only confirms a basic electrical path exists, and a generic quality check lacks a specific method to evaluate frequency response. So a sweep best captures the overall quality of a transmission line.