Overview
This article will discuss the different specifications for USB-C and the minimum requirements for use with the CTC-1402.
USB-C specifications
USB-C is often thought of as being a standard, meaning everything USB-C is equal, however this is not the case.
The only thing that can be considered equal is the connector on the end of the cable. The cable in-between can vary greatly.
The table below gives an overview of the USB specifications and their supported data rates and available connectors as currently defined by the USB Implementers Forum (USB-IF).
| Specification | Name | USB-IF branding | Data rate | Connector types |
| USB 2.0 | USB 2.0 | High Speed | 480 Mbit/s | A, B, Micro-B, C |
| USB 3.0 | USB 3.2 Gen 1 | SuperSpeed USB 5Gbps | 5 Gbit/s | A, B, Micro-B, C |
| USB 3.1 | USB 3.2 Gen 2 | SuperSpeed USB 10Gbps | 10 Gbit/s | A, B, Micro-B, C |
| USB 3.2 | USB 3.2 Gen 2x2 | SuperSpeed USB 20Gbps | 20 Gbit/s | C |
CTC-1402 cable requirements
As you can see above, while the connector may be USB-C, the data rate capabilities of the cable differ substantially, leading to confusion about what cables can and can't be used with the CTC-1402 USB-C input.
A typical example of a USB-C cable running at 480 Mbit/s would be the one you get in the box with a new mobile phone.
It may be perfectly capable of handling fast charging, connecting to headphones for audio, or a PC for data transfer, but falls far short of the requirements to pass video.
For video transfer, the cable must be of USB 3.2 Gen 1 standard, therefore having a data rate of at least 5 Gbit/s.
The cables themselves are not typically marked with their specification so it is important to check the manufacturer information prior to purchasing.