Technical Publications

September 27, 2011

WHAT IS S/N RATIO & WHY IS IT IMPORTANT?

The Signal-to-Noise Ratio specification sometimes noted as “S/N Ratio”, “SNR”, or just “S/N” for cameras, amplifiers, and wireless equipment is sometimes overlooked and miss-understood. The S/N Ratio notation will show up in many specification sheets for the equipment in a CCTV system, so it must

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September 27, 2011

PUT “HD” IN YOUR CCTV

Now there is a new HDTV camera format that is compatible with the existing 75 Ohm coaxial cable used by the analog cameras. So you can replace an analog camera with a new HD CCTV camera without having to change the system wiring.

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sdi ptz sdi video sdi-c sdi-d

September 27, 2011

UP COAX PTZ CONTROL FOR SDI CAMERAS

If you need to get PTZ Pan Tilt Zoom control to an SDI camera without running a set of data wires by using the existing coax cable, this article will help you do just that.

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sdi remote control sdi-c sdi-d

September 27, 2011

CABLE SLOPE LOSS CAUSE AND EFFECT

Cable Slope Loss is the main cause of most long run video image quality issues. Whenever video is sent down a long coaxial cable, or an Unshielded Twisted Pair (UTP) cable the video will arrive at the other end of the cable with a lower

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cable loss cable slope loss dull pictures gb-60 slope loss

September 26, 2011

HOW TO MAKE MAXIMUM USE OF YOUR SDI SIGNAL

The CCTV industry has begun to use a new type of digital High Definition camera referred to as HD CCTV that has an SDI (Serial Digital Interface) output. There are multiple manufacturers of this type of digital camera and they are very price competitive with

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sdi ptz sdi remote control

June 10, 2011

WHY ARE MY PICTURES FUZZY ON LONG CABLE RUNS?

The culprit is the cable connecting the Camera to the Recorder. It is just that simple, but an actual description of the process that introduces this loss is a little more complex. This loss of picture detail or picture fuzziness is actually caused by four

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fuzzy camera fuzzy pictures gb-60

June 4, 2011

AUDIO DE-EMPHASIS RESPONSE TABLE

In the transmission of FM modulation there is more noise at the higher audio frequencies than there is at the lower audio frequencies. To compensate for this unbalance and make the noise more uniform over the audio spectrum, the Broadcasting industry developed some standards for

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audio de-emphasis audio pre-emphasis audio volume meter avm emphasis

June 4, 2011

HOW TO GROW YOUR BUISINESS IN A DOWN ECONOMY

When I ask them what they are doing to boost their sales, some say they are just doing a lot more of the usual sales activities, but complain that it is not delivering the level of sales they need. Others I have spoken to have

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grow your business

June 1, 2011

Checking Laptops for Real-Time Audio and Video Capability

A recording engineer friend recommended a free utility called “DPC Latency Checker” that you can download from www.thesycon.de/deu/latency_check.shtml. It shows delays due to improper device driver handling of Deferred Procedure Calls on Windows machines, to check if your computer is suitable for real-time audio or

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checking laptops real-time audio

March 14, 2011

HOW TO DETECT CAMERA TAMPERING IN REAL TIME

When you discover tampering in a CCTV security system it normally occurs at the most vulnerable and exposed part of the system, the video camera. Normally the camera is mounted outside of the security of locked rooms and under the eye of the public. There

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camera guard camera tampering cg-4 tssa

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