Benefits of the 73fifty include:

• PAL or NTSC
• 3 seperate inputs, each having 4 amplified and conditioned outputs
• Elimiates pictire jitter and time base errors.
• Stabilises onscreen images and text
• Restores distored or misshpen vertical and horizontal sync and colour bust signals
• Automatic Gain Control insures a proper 1 V p-p output
• Colour Bar Generator when no signal applied
• Bi-colour front LEDs show channels with valid signal levels.
• Ideal for pipeline or diver/rov applications where upto 3 cameras are being used.
• 1U slim line design
• 90 - 250 vAC input

With the popularity of TFT monitors in the modern ROV or diver control shack, few of these monitors have "looping inputs". This means each monitor has a permanent 75ohm termination. With two non-looping monitors connected together, the line would be double loaded and result in a dim picture on each monitor.
Using multiple text overlays and digital recording equipment will exacerbate this problem by weakening the sync signals - causing scrolling text and "wobbly" recordings.

Using the videoAMP will solve these problems by driving each monitor / overlay or recorder at 100% signal levels.