1. USB4 (40 Gbps), USB3.2 Gen2 (10 Gbps), DP1.2 and HDMI 2.0 standards are supported.

2. Support PD3.1 specification, can communicate with the equipment to be tested, obtain the correct upward charging voltage and current, provide the pull load terminal, and have the voltage and current monitoring circuit, automatically judge the PD function.

3. Up to support 7680*4320@30Hz video signal output, 4 LANE transmission DP signal.

4. The front panel is equipped with an independent LED indicator light to indicate the test results, and two LED digital tubes to display the working voltage and current of the product to be tested, which can cover VBUS whether there are open circuit and short circuit problems.

5. Provide six USB3.2 test modules, one audio (MIC&SPK) test module, three DP1.2 test modules (one supporting 2K/4K@30 HZ, two supports 2K/4K@60 HZ), two HDMI 2.0 test modules (supporting 2K/4K@60 HZ), one HDMI1.4a test module (supporting 2K/4K@30 HZ), one VGA test module (supporting 1920*1080@60 HZ), and all test modules can be added or matched according to customer needs.

6. The interface software used for testing can be customized according to the customer test needs.

7. Compatible with common Docking, Dongle, Adapter and other Type-C interface devices on the market.

As shown in Figure Figure (1-1), for each USB device, there are one or more Host controllers, the Host controller and an Root Hub as a whole. This Root Hub can be connected with multistage Hub, and each sub Hub can be sub Hub. Each USB device is connected as a node to a different level of Hub.

1-1

As can be seen from the connection diagram of the test equipment (1-2), USB 3.0 contains SS, HS, FS and LS channels, in which SS channels and Non-SS channels are relatively independent. Testing of the USB function requires separate testing of the SS channels and the Non-SS channels. The user connects the USB test board to the USB port (USB Host) of the device to be tested, which is enumerated in the operating system device manager and cooperates with the test program to detect the enumerated device (USB Device) and USB port under the system. At the same time, the built-in USB BC1.2 control chip realizes the comprehensive functional test of USB equipment type, working mode, data transmission, power supply and load.

1-2

Two-digit dial code (left): 1 dial code is used to control the power supply, using USB A to C 5V self-power supply when dialing, and 20V external power supply is used when dialing. The 2 dial code is only used when updating FW, up-dial the test mode, dial down to enter the burning mode.

Two-digit dialing (right): Number 1 dialing is used to control the cable connected during the test, use a USB-A to C cable when dialing up, and a USB-C cable when dialing down. Dip switch 2 is used to control the initial status of the test box. The up-dip is in 3.2 GEN 2 mode and the down-dip is in 3.2 GEN 1 mode.

Four-digit dial code: 1~4 dial code switch: control ID (0~9) (Note: when multiple boards are connected at the same time, the test board equipment number can not be repeated!)

As shown in the figure below, the test board collects and samples the audio source files of the HOST terminal (Phone & PC), compares the A/D ADC samples with the standard audio files, and then returns the sampled parameters with the software.

Transmission parameters for the audio transmission and test instructions for the test board:

Signal-to-noise ratio (S/N): the ratio of effective sound source to ambient sound, which reflects the quality of the transmission sound source, using the Fourier algorithm to compare the effective sound source and ambient sound respectively;

Volume (Value): the sound loudness of the transmission end, which detects the voltage amplitude of the analog signal on the transmission end;

Frequency of the left and right channel (Freq): detection of sound frequency at the transmission end, detection of whether there is crosstalk between the left and right channels;

Figure 1 (Description of test process)

Figure 2 (illustration of test box)

The test box is built-in high-speed MUX IC and A/D sampling circuit design. When the test box will switch the high-speed differential line of HDMI and DP to the AD sampling circuit through the main control IC to determine whether there is an open circuit in the current interface or the signal pin adjacent to the GND or the differential line (P/N).

As shown above, for the pinout definition of HDMI and DP, the level of the difference line P/N of normal HDMI is different:

The network test

Way 1:

Test whether gigabit protocol is normal, DHCP functional and MAC address OK in full-duplex mode

Way 2:

Test whether gigabit throughput is normal (using a computer as a server), DHCP function is normal, and MAC address is OK

TF/SD test

The test principle:

Send a fixed-size packet and then calculate the size card read and write speed

PD test

Support PD3.1 specification, can communicate with the equipment to be tested, obtain the correct uplink charging voltage and current, provide the pull load terminal, and have the voltage and current monitoring circuit, and can display the voltage and current through the external digital tube. With the electronic load instrument, the operation test software can set different load currents (5V, 9V, 12V, 15V, 20V,28V), and automatically judge the quality of PD function. With our self-made transfer board can achieve CC end, double-sided function switching test.

PS: The default is the no-load test, which can access the electronic load through the chassis right 4 PIN pin to achieve the effect of fixed load test

Upgrade FW from left to right dial code 1 (need to reset, the voltage and current display as dynamic cycle- - - -, upgrade after successful dial and reset, FW upgrade is completed), dial code 2 is not used, dial code 3,4 correspond to binary high to low, dial code up to 0, dial code down to 1, ID value range of 1~4. (Note: When multiple boards are connected at the same time, the test board equipment number cannot be repeated!)

Title

Description

Q1: Does the test card of this interface test product apply the interface standard protocol?