Video signal galvanic isolator

Benefits

The Humbug eliminates humbars, picture tearing, cross talk and rolling
The Humbug improves existing and new installations
Distortion free images enhance your company’s reputation
Can avoid the use of expensive fibre optic cable
Safety - isolation to 500V DC
Power supply is not required
Passes video and camera control signals in both directions
Colour compatible
Prevents power cables laid by others interfering with the CCTV system.

Technical specifications

Very low insertion loss of 0.5dB
Very high frequency response, 0-3 dB at 10 MHz
Zero colour distortion
Suitable for 75 and 50 Ohms systems
Will operate with non video signals
Isolation voltage, min 500V DC
Insulation resistance 100M Ohms
Constant group delay
Connectors BNC
Dimensions: width 50mm (70mm including fixing tabs), height 48mm, length 90mm including connectors (approx 2 (3) x 2 x 4 inches)
Weight approximately 176 grams (6 oz)

Video signal distortions

Ground loops occur when the earth potential at the camera is different from the potential of the monitor. This difference may only be a small voltage but it can cause large current to flow through the shield of the coaxial
cable. The Humbug breaks this circuit allowing only video and camera control signals through. These large currents will cause picture distortion and safety problems if they remain.

Mains pick up occurs when coaxial cable runs in parallel to a power cable. A sinusoidal voltage develops on both the shields and the video core. This is often seen as a "Hum Bar" passing down the screen. As the Humbug only
sees the difference between the signals connected to it the video is passed without hum.

Cross talk occurs when a cable carrying high frequency signals lies next to the video cable. This is often seen as diagonal lines passing across the screen. Sometimes they come and go, the Humbug eliminates most of these as
it only sees the difference between signals connected to it.