I have a hikVision Dvr. It is current connected to my home network and my main TV. I want to add a monitor to this set up. I am thinking about taking the line from the dvr, split it and put one cable back into tv and the other cable into the new monitor. My question is, lets say the TV is not monitoring the dvr input and is instead on say the cable box. Will the cameras still be projected on the Monitor? Same situation (TV showing cable) can i use the mouse plugged into the DVR to change the settings on the monitor?