Electronics Engineering (ELEX) Board Practice Exam

What device allows the simultaneous viewing of four surveillance camera images on a monitor?

1. Splitter

2. Quad switcher

3. Multiplexer

4. Router

The correct answer is: Quad switcher

A quad switcher is specifically designed for the purpose of displaying four different video feeds simultaneously on a single monitor. This device takes input from multiple surveillance cameras and combines those images into a single output that can be viewed easily, allowing users to monitor several locations at once without needing multiple screens. Unlike a splitter, which typically divides a single video signal to display on several monitors, a quad switcher processes individual video feeds and arranges them in a way that each camera image is visible in its designated portion of the screen. While a multiplexer can also serve to combine inputs from various cameras, it is often more sophisticated and may provide additional features like recording or switching between feeds, not necessarily focused on simultaneous viewing. A router, on the other hand, is used for data transmission across networks and is not relevant to video feed management in this context. Therefore, the quad switcher is the most suitable choice for viewing four surveillance camera images at once.