The TestPro also performs frequency measurements on the cable under test. A separate limit can be specified for return loss (reflection) across the frequency range.
The TestPro reports PASS/FAIL for TDR and Return Loss independently. Most customer determine the cable as FAIL when both TDR and frequency results fail.
The frequency range of the return loss test depends on the adapter used. If the 6GHz AD-1P-6G adapter is attached, the frequency measurements are performed up to 6 GHz. For other automotive test adapters, frequency measurements are performed up to 3 GHz.