Ground Loop Isolator

Video Ground Loop Isolator

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Networks & Security

All Product Enquiries to:

EQL Networks & Security
PO Box 351
Minto NSW 2566
Australia

Tel: + 61 2 9824 5680
Fax: + 61 2 9824 5685

* EQL Networks & Security
is 100% owned by
EQL International Marketing Pty Ltd
Australian Business No: 93 098 402 218

Connecting Networks Worldwide

Major Features of Ground Loop Isolator:

High Reliability and Durability
Compact enclosure
Economy package, High quality and performance
Passive Device (No power supply required)
Transient Voltage Suppressor included
BNC Male with 100 mm miniature coaxial cable input and BNC Female output (E10500) or BNC Female input to BNC Male with 100mm miniature coaxial cable output (E10500D)

Specifications for Ground Loop Isolator:

Bandwidth:		DC to 10 Mhz
Impedance:		75 ohm BNC Male to 75 ohm BNC Female
Maximum video input:		1.1 Vp-p
Insertion Loss:		<0.5 dB
Isolation Voltage:		750 Volts DC
Insulation Resistance:		>100 M ohm
Transient Voltage Suppressor:		12 Volts rms
Operating Temperature:		0 to 55 ^oC Storage: -22 to 80 ^oC Humidity: 95%
Casing Size:		50 x 30 x 25 mm
Casing:		Fire retardant plastic
Casing Colour:		Black

Note: Specifications subject to change without notice

Quick Links

Ground Loop Isolator
BNC Male to BNC Female
For Camera End
P/N: E10500

BNC Female to BNC Male
For DVR End
P/N: E10500D

The video ground loop isolator has been specifically designed to provide a cost effective solution to a common CCTV problem of multiple ground paths or ground loops which results in a rolling hum bar or instability in the picture being captured.

An added feature of the Video Ground Loop Isolator is the incorporation of a Transient Voltage Suppressor to protect against surges.

Designed as a passive device the EQL Video Ground Loop Isolator will be an essential component to incorporate in all CCTV installations where ground loops are a known problem and to future proof the installation from possible interference particularly for high security applications.

CCTV Image with Hum Bar Problem CCTV Image with Ground Loop Isolator
Due to Multiple Ground Paths or Loops to eliminate the Hum Bar

What is a Ground Loop

A ground loop occurs when there is a potential difference between inter-connecting equipment such as the camera and DVR and is due to an imbalance in the power loading of the two systems. The potential difference cause a loop current to flow between the two inter-connecting equipment and as a result any interfering source such as 50 Hz mains power is picked up by the ground current flowing through the braiding of the coaxial cable instead of it acting as a shield to protect the interfering source from entering the coaxial cable. See Figure below.

The 50 Hz mains power or hum is then passed on along with the wanted video signal from the camera and displayed on the monitor as a rolling hum bar

Where to Install the Ground Loop Isolator

The Video Ground Loop Isolator should ideally be installed at the CCTV Camera end for better results by using E10500 by connecting the BNC Male connector of the Isolator to the camera and the BNC Male connector of the coaxial cable to the BNC Female connector on the Isolator. Where this is not possible E10500D should be used at the DVR End. In a multi-camera installation it is recommended that a Video Ground Loop Isolator be installed for each camera.