Bad patch cord at main / remote reported on DTX CableAnalyzer
REMARQUE : If you are testing using a 500 MHz test limit, please update your testers first.
When running an Autotest using the Channel Adapters, you may see Bad patch cord at main or Bad patch cord at remote.
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Un exemple de l’écran est représenté ci-dessous :
- La cause est un mauvais raccordement (les torsions n'ont pas tenu) du connecteur RJ45 sur le cordon de raccordement.
- Ce cordon de raccordement n'a pas été certifié.
- Les normes exigent que les fabricants de testeurs éliminent les effets de l'adaptateur de canal.
- Cela inclut la prise RJ45 insérée dans l'adaptateur de canal.
- Que se passe-t-il si cette prise RJ45 n'est pas bien raccordée ? Rien. À condition que le reste de la liaison soit correct, nous devrions rapporter une RÉUSSITE.
- However, the DTX CableAnalyzer will detect a poorly terminated patch cord.
- The DTX CableAnalyzer takes a look in the Time Domain to see how good/bad the NEXT is in just the Channel Adapters.
- If it exceeds a pre-dertimed level*, it will not implement the Channel Adapter cancellation and give the warning above.
- Solution à un message de mauvais cordon de raccordement : remplacez/réparez le cordon de raccordement.
* Predetermined level
The trigger value is 34 dB @ 100 MHz in the Channel Adapter for Category 5e and 6. This is quite a relaxed value. To trigger this warning, the termination of the RJ45 plug must be significantly less than desirable. For Category 3, this is relaxed even further to 25 dB @ 100 MHz. For Class F, it is set to 52 dB @ 100 MHz. We implemented a new trigger value of 28 dB @ 100 MHz for Category 6A / Class EA in Version 2,22. It was previously set at 34 dB which was too sensitive.
