Using the slingbox to watch cable but they have converted to digital and you have to use their digital converter box. Problem is the slingbox is in one building and monitor in another building so not sure if it can be converted in the office where it is watched threw the monitor. He is only picking up about 15 anolog stations.
First of all, you need to make sure that the A/V Source is a compatible one, besides that, you can run the Setup from one building, and connect from a different one using the Internet Viewing feature.
To check the compatible audio and video devices you can use the following link: