AVerMedia NV1000/3000/5000/7000 User’s Manual
3.2.3Recording Setting (Video and Audio)
Click 
to configure the recording setting.
The bar below shows cameras that are connected to your digital surveillance system. When the number inside the camera icon lights up, it means the camera is connected to the digital surveillance system. It supports up to 16 cameras. The number on the left lower corner represents the video size of the channel.