The AWVG1 has three identical outputs on the three BNC ports. The fourth BNC provided the trigger out, which can be used to trigger an oscilloscope on a particular line and sample. The AVG1 ports depend on the format loaded to the module at the time. For example, if NTSC is being generated, the three channels can be configured as all composite, or Y,C, Composite. If a GBR component format is being generated, the outputs are G,B,R respectively. Format could also be Y, Pb, Pr if this signal format is loaded to the module. The fourth output on this module is the trigger out, with the same use as the trigger on the AWVG1 module. The AWVG1 also has one input, which allows an external generated signal to be switched to the output of the module.