Technical Publications

May 31, 2016

RADIO & POLICE TEN CODES

RADIO TEN CODES Radio communication networks have always suffered from a half duplex (one person talks at a time) problem. Unlike cell phones or other telephone communications that are full duplex where you can simultaneously talk and listen at the same

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May 10, 2016

WHAT IS A “dB” AND WHY IS IT USED?

The term dB is used throughout the electronics and communications industries to specify operating levels and equipment specifications. A full understanding of this term and its relationship to levels will help you in your day to day operations.

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May 10, 2016

THE “F” CONNECTOR AND THE FUTURE OF SDI-CCTV

What is it that the (CATV) Cable TV Industry knows about connectors that the (CCTV) Closed Circuit TV Industry needs to discover? The answer is the low cost, water tight, easy to install, connector used in the CATV industry. The CATV industry uses the "F"

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May 10, 2016

CCTV VIDEO GROUND LOOP PROBLEM SOLVING

This article will discuss video ground loop problems in CCTV installations. The cause and how it effects picture quality with solutions to eliminate the problem.

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January 7, 2016

HOW TO FIX ELEVATOR CAMERA PROBLEMS

Every CCTV technician knows that unforeseen problems can occur when they install cameras in a new location, and even swapping out one camera for another can cause a hidden problem to surface. When installing a CCTV camera in an elevator car to view the riders,

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December 18, 2015

HOW TO DETERMINE POWER WIRE GAGE

This article can be used to estimate the minimum wire gauge that must be used to at various cable pair lengths to power a camera and any required illumination. To begin with there are three major factors to consider when selecting the cable wire gauge

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December 18, 2015

IP OVER COAX CABLE ISSUES

New IP cameras are gradually replacing the old analog cameras in exiting CCTV installations to boost the picture definition and upgrade them to the new digital technology. In some cases the running of new network cable for IP cameras is not economical or it requires

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December 16, 2015

HD-TVI AND THE TSSA VIDEO LOSS RULING

For those who are doing CCTV installations in Canada there is a ruling by the TSSA “Technical Standards & Safety Authority” Clause 5.1.2(b) of the Liquid Fuels Handling Code that states: Control equipment for the self-serve dispensers shall be located such that the self-serve attendant

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December 6, 2015

COMMON MODE SUPPRESSION IN THE IP VIDEO SYSTEM

Unlike coaxial cable the network cable has no external shield covering the transmission wires to prevent outside interfering signals from getting onto the wires and mixing with the signal, this is done to reduce high frequency signal loss that a ground shield would induce and

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COMMON MODE common mode interference common mode testing ip camera balance

November 27, 2015

HOW TO CHOOSE THE RIGHT VIDEO FORMAT

In todays world the CCTV installer has many video camera options to choose from. He can use Analog or Digital cameras with a full range of picture qualities from Standard Definition (SD) to High Definition (HD). Also the installer must consider which video format to

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