Firstly, you have to make sure that the VPT300 is mounted on a flat surface
Secondly, make sure of video input parameter settings
Thirdly, make sure that:
1. The distance between the speaker and the VPT300 is greater than 2 m.
2. Speak normally and continuously.
3. Use a stopwatch to calculate the image switching time.
The VPT300 is expected to switch to close-up video images of the speaker after the speaker talks for the following duration:
Sensitivity set to High: 3-5s
Sensitivity set to Medium: 5-8s
Sensitivity set to Low: 10-20s
If the VPT300 does not switch to close-up video images or does not switch within 150% of the preceding maximum duration, perform camera calibrating following the below link:
https://support.huawei.com/enterprise/en/doc/EDOC1100026426?section=j00b
