After reviewing the data sheets and the results of our Advanced Cable Tester v2 demo, I have a few follow up questions on the reports.
Pin and Wire Resistance – Looking at the DC Resistance report - regarding the DCR measurement of the DisplayPort to DisplayPort cable test report, is the test measuring the DCR of each data signal? I assume it is not the same as USB-C to USB-C cable testing.
- Please clarify if other PD based tests are included within the profile.
- What does the asterisk * on a profile name indicate?
Thank you for your questions! Listed below are our responses to each question.
Advanced Cable Tester v2 Profiles and Measurements
Pin and Wire Resistance Measurement
Pin and wire-level resistance are measured for the DisplayPort to DisplayPort cable. The design and pinouts of the cable differ from USB-C to USB-C specifications. However, the same types of measurements are applied. In the DC Resistance report, in the highlighted ML Lane 0 GND we are applying/sourcing power at Plug 1, Pin 2, and the sink is Plug 2, Pin 11 to test for resistance on these pairs of pins.
Standards by VESA - the organization for DisplayPort Industry standards, are not as clearly defined for resistance as the USB-IF standards, but VESA values should be within tolerance.
- Note - You can assign discrete numerical values for resistance within the profile template to create custom profiles.
Power Delivery
PD3 indicates Power Delivery 3.0. The Advanced Cable Tester v2 validates the E-Marker chip to verify whether the cable supports PD2/PD3. It does so by measuring the presence of SOP' & SOP'' packets (first two sets of tables on the left in the E-Marker section of the report). It also measures the VBUS Current Handling Capability and PD Spec 3 Specific VDO's, which are the other two tables on the right in the e-Marker section in the DC Resistance report. Please note - this device does not measure other PD data or Power Negotiation traffic.
Custom Profiles
The asterisk* indicates a profile is a preset profile that is included in the profile library, which is based on the cable types that are supported. As previously discussed, you can modify and then save any profile to create a new custom profile. Note - an asterisk will not be assigned to a custom profile.
Connector Type Measurement
Testing a USB-C to USB 2.0 Micro-B cable can be accomplished by plugging it into the USB-C to USB 3.1 micro-B module. This test would be associated with the preset USB Type-C to USB 2.0 Micro-B profile.
Additional Information and Tutorials
For more information about using the Advanced Cable Tester v2, here are some case studies and video tutorials.
Case Studies:
- Infrastructure Team: quality control for critical testing applications
- Interconnect Solutions Manufacturer: testing cables operating under extreme conditions
- Cyber Security Technology Foundation/TrueTesting: ensure consumers that cables are functioning as intended and safe to use
Videos for cable types:
We hope this answers your questions. Additional resources that you may find helpful include the following:
If you want more information, feel free to contact us with your questions, or request a demo that applies to your application.