We have questions about the test results provided with the Advanced Cable Tester v2 (ACTv2). We tested our USB4 v1/v2 certified cable on the ACTv2, but it failed on the VBUS plug DC resistance as shown below:
The criteria on your ACTv2 is set as max 0.04 Ohm, but under the specification of USB, this criteria seems to apply to connector only - without assembly, which makes it inapplicable for an assembled cable. Our questions:
- Is that necessary for testing an assembled cable?
- If not, is there a way to ignore this criteria for our tests?
Thank you for your questions! The parameters are not part of the specification for a final cable assembly, and they can be removed.
About DC Measurements
We include that measurement by default, as it can be a useful indication of manufacturing problems for many users. 40 milliohms is a very small value, which makes is a difficult measurement to take. The layout of the PCB also affects this measurement. However, you can customize an ACTv2 profile to support your measurements per your specifications.
Customize a Profile for an Assembled Cable
As this measurement is unnecessary for your project, and it causes failures, you can create a profile per your specifications. To do so, clone one of our standard profiles to a new custom profile, and set the pin DCR maximum to Infinity. That measurement will still occur during testing, but as long as your cable operates correctly, and the DC resistance value is greater than 0.040 Ohms, your cable should pass the test.
For additional information and steps on how to create a custom profile, please see: How to Create a Custom Profile with the Advanced Cable Tester v2
We hope this answers your questions. Additional resources that you may find helpful include the following:
- Advanced Cable Tester v2 User Manual
- Advanced Cable Tester v2 Data Sheet
- USB Test and Compliance information
- Case Study - Advanced Cable Tester v2 – Interconnect Solutions Manufacturer
If you want more information, feel free to contact us with your questions, or request a demo that applies to your application.