You would need to get the 2.4Ghz cameras with the multi channel receiver. You will also need a way to be able to process multi video feeds on the PC which I have no clue as to how you would do this.
Why the need for 3 cameras? You can use just one camera.
actually, the cameras send data back to a wireless reciever connected to a TV using AV cables. I need 3 cameras for my 3DOF arm, navigating my robot, and checking for hazards behind me.
I like the use of three cameras becuase they can all be controlled differently.
I under stand, so you do not want to process the video data, but rather, just view it on TV screens. I assume you are talking about user-assisted navigation? I thought you wanted to have autonomous controlled video navigation.