Technical Publications

November 21, 2011

INDUSTRIAL USES FOR VIDEO PRIVACY MASKING

Video Privacy Masks are generally used to block out specific areas of a video image. However there are other industrial uses that expand the role of these products beyond the CCTV marketplace and at the same time create other opportunities for installers to make money.

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October 12, 2011

PUBLIC ACCESS IN THE DIGITAL AGE

As the conversion from analog to digital television continues in both the broadcast TV and cable TV industries there are many new problems to solve. This article discusses issues related to public access, the program interface and how to guarantee that audio and video signal

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video agc video level control video master vm771

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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hd-tvi hdfm-1 sdi-c sdi-d

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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cm-2 S/N RATIO signal to noise ratio

September 27, 2011

PUT “HD” IN YOUR CCTV

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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

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