HOW TO MEASURE DIGITAL SATELLITE S/N RATIO BY: Frank McClatchie One of the greatest advantages of a digital satellite signal is that it does not show the effects of Gaussian Noise on the picture until the noise level completely overwhelms the signal level and causes excess
HD-TVI VIDEO AND ELECTROMAGNETIC INTERFERENCE BY: Don McClatchie The new HD-TVI and HD-CVI video formats deliver excellent High Definition video images usually at a lower cost than the IP digital cameras and since they use the same coaxial cable as the old analog cameras it is
HOW TO GET THE WATER IN YOUR CONDUIT OUT By: Don McClatchie Many CCTV installations require metal or plastic electrical conduit to be used to protect the cables and wires from wear and tear or tampering. Whether the conduit is above ground outside or underground inside
SOUND FREQUENCY WAVE LENGTH By: Don McClatchie All signals both RF and Audio are electromagnetic waves that travel down wires or through the air and they all have a wavelength. The wavelength of any frequency is the distance any frequency travels in the time of one cycle.
WHEN TO USE A/B SWITCHING ON IP CAMERAS BY: Don McClatchie IP cameras have ushered in a new era of CCTV installation complete with some new ways of providing security with new applications for the customer in both business and home security systems. One of the new
BRINGING TVI, CVI, & AHD CAMERAS INTO FOCUS By: Don McClatchie The High Definition camera movement has definitely arrived and it brings with it a whole new generation of technology and techniques for installers to learn about. The first HD cameras to find their way into the
IP VIDEO REFLECTIONS ON COAX CABLE By Frank McClatchie In the process of retrofitting IP cameras into an analog video installation it is sometimes possible to use the existing coaxial cable to save time and construction expenses when the cables are hard to run or require extensive
THE AFFECTS OF COMMON MODE INTERFERENCE ON IP VIDEO SIGNALS BY: Frank McClatchie The transmission of a digital IP video image involves the generation of “differential digital signals” on the two pairs of wires that constitute the wire transmission path. The term differential means that whenever there
JUST HOW CLOSE IS YOUR IP CAMERA TO FAILURE ? By Frank McClatchie This is not a casual question. IP Camera Systems are famous for both delivering an excellent picture and also for intermittent operation for no apparent reason. It is in fact critical to the reliable
RADIO OPERATORS ALPHABET Sometimes Radio transmissions can cause some kinds of speech to be unclear, that is the pronunciation of some letters when spoken on the radio can be garbled or mistaken for other letters. The reason for this is the bandwidth restrictions imposed by the
