GRL is the worldwide 1^st Thunderbolt™ Certified Lab by Intel and Apple since 2012.  Thunderbolt 4 can tunnel DisplayPort, PCI Express, USB 3.2 with its transfer data rate up to 40Gbps (20Gbps x2) through USB-C with the PD capability.

Thunderbolt™ 4 Systems and Devices Compliance Test and debug.

Tests include the following:

• Thunderbolt Transmitter & Receiver & Return Loss Electrical Test
• USB 3.2 Electrical Test
• DisplayPort Electrical Test
• PCI Express Electrical Test
• Thunderbolt Function Interoperability Test
• For Thunderbolt Device Certification, it should get certified for both Windows and macOS at the same time.
  
  

Contact GRL for more details