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1 |
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| In the case of surveillance systems, each installer and user must be aware that devices having too low parameters, not well suited for the purpose, may bring threat to life or property. It will also effect in insufficient reliability of the system and frequent servicing problems.... more »
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| bib21 |
2 |
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| Video signal used in CCTV is called VBS (video, blanking & syncs, or video baseband signal) and CVBS (composite/color video baseband signal).... more »
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| bib21_02 |
3 |
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| Before we choose a monitor, we should pay attention to monitor's parameters: resolution - capability of showing details, picture geometry and stability, maximum brightness and contrast etc. ... more »
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| bib21_03 |
4 |
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| High precision of image sensor, good choice and quality of lens - are the basis for good results.... more »
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| bib21_04 |
5 |
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| Parameters of CCTV lenses and criteria for selecting appropriate devices.... more »
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| bib21_05 |
6 |
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| There are following groups of these devices: switchers and quads, multiplexers and video matrix.... more »
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| bib21_06 |
7 |
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| Systems which record video signal in digital and compressed form are nowadays basic platform of image registration, offering numerous features connected with processing and transmission of information.... more »
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| bib21_07 |
8 |
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| Due to security reasons and tendency towards cost reduction (necessity of employing professional staff), surveillance system centers are situated in some distance from the protected buildings and places, thus the leading role of good quality video transmission.... more »
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| bib21_08 |
9 |
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| Use of wireless transmission will significantly extend the scope of surveillance systems towards scattered locations, such as electricity relay stations, waterworks, elements of road infrastructure and many other remote places.... more »
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| bib21_09 |
10 |
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| In order to ensure proper work conditions for protected devices, housings may be equipped with heaters, fans, cooling systems etc., depending on specific environment.... more »
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| bib21_10 |
11 |
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| Improper powering of cameras is often the main reason of faulty operation of CCTV system.... more »
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| bib21_11 |
12 |
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| Use of Pan-Tilt device is the easiest way of increasing field of view of a camera.... more »
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| bib21_12 |
13 |
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| Good traditional lighting has many advantages. However, it is visible, and it may be easy for an intruder to get round the light zones. It requires a lot of energy and is expensive.... more »
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| bib21_13 |
14 |
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| Video signal can be transmitted in analog or digital form.... more »
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| bib21_14 |
15 |
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| Typical video connector in CCTV is BNC.... more »
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| bib21_15 |
16 |
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| Signal amplification is used to compensate attenuation of cables. Attenuation figure depends on cable type and its length.... more »
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| bib21_16 |
17 |
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| Modulator (or RF modulator) allows conversion of baseband video (or audio & video) signal into RF band that can be received by regular TV sets.... more »
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| bib21_17 |
