The Advanced ATV Repeater is probably the most versatile ATV repeater controller in The World. It can run entirely under it's own operating system or all it's functions can be controlled from any other computer. All commands and data from the controller are in the form of single bytes on an RS232 compatible data stream.
The full technical specification, description and users handbook is on the Documentation page.
You can watch it in action at http://www.stvg.co.uk/gb3zz.html.
When not in use, it reverts to beacon mode and sends out a colour testcard to identify it's transmission. When in use, it relays live pictures from nearby Amateur Television enthusiasts.
Clicking on the buttons above will take you to different pages on this web site, each describing the design and operation of that section of the electronics.
Please note that the design is modular and will work perfectly, albeit with reduced capability if some sections are omitted.