CCTV Surveillance Systems Used as a Crime Fighting and Prevention Tool

How to Not Get Robbed and Ripped Off When Hiring a CCTV Company or Buying a CCTV System

Part 2

· Camera Resolutions. Analog and virtual camera resolutions are rated for customers in TV Lines (TVL) and mega pixels (MP). Below is a listing of CCTV resolutions and the corresponding digicam formats. There are 2 matters to don’t forget whilst deciding on cameras:

(a) the quality of the picture you get relies upon at the nice of “the glass” (lens) and the CCD picture sensor at the digicam. Do you virtually assume you’re gonna get jaw-dropping pics from that $50 blow-out digicam?


(b) the right digicam resolution and type must be matched with the right recording layout. Also, “too much” or “too little” resolution or the incorrect layout are both truly a waste of time and money or surely might not work.


1. CIF cameras can be among 420-480 TVL. Known as “wellknown res.”

2. D1 cameras must be six hundred TVL (even though 500+ TVL cameras exist for D1). Known as “hi-res.”

3. 960H cameras have to be at seven hundred TVL and used with a 960H DVR. Known as “remarkable hi-res.”


four. IP cameras range from 1MP to 5MP. IP cameras can only be used with IP systems and NVRs

5. HD-SDI cameras need to be at 2.1-2.2MP and will most effective be used with HD-SDI DVRs.

6. HD-CVI will use 1.3MP (720p) and 2MP (1080p) HD-CVI cameras and may simplest be used with HD-CVI DVRs (properly, you may use HD-CVI cameras with analog DVRs, however they might not be hello-def, so what’s the point).

Just due to the fact a digital camera boasts “700 TV Lines” or 8MP does not mean you’ll get advanced video decision. Mentioned above, many things come into play: excellent lenses, image processors, outright mendacity, and many others. One way to test that is with an ISO line chart and software to investigate the outcomes and a few CCTV groups will take this upon themselves to do that. Oh sure: larger MP cameras method smaller pixels. More is not constantly higher. So, something less than these digicam specifications for each format is without a doubt a waste of time due to the fact you are no longer getting the overall resolution out of each layout. Also keep in mind, for instance, that if an installer tries to promote you a seven-hundred TVL digital camera with a D1 device (six hundred TVL max) you may see no introduced resolution and a 420 TVL camera will now not provide the overall resolution, both (“an excessive amount of” and “too little”).

· Frame Rate. How many frames in step with 2nd (fps) the DVR can document consistent with channel (camera). 30fps in line with channel is the most and could use the maximum tough power area. 15 fps is more than good enough. In quite a few cases I actually have used 7fps on a patron’s gadget with high-quality consequences. If a DVR is not capable of recording as a minimum 7fps on ALL channels, do now not buy. The option of as a minimum 15fps on ALL channels is best. You can constantly lessen or enhance this later. Oh yeah, I almost forgot. Some manufactures will use “ips” of their advertising fabric. IPS is “pictures in step with 2nd” (no longer frames according to 2d). So, for example, you could see a sixteen channel DVR that lists “30ips on all channels.” Looks precise, right? WRONG! It is nothing however one huge lie. 2ips=1fps. In other phrases, you would need 60ips to same 30fps. So, if you did see the above DVR listed as “30ips on all channels” you would only be getting a max of 15fps on all channels. All that is, is an try to scam the purchaser by way of using “dazzling” numbers so you’ll buy their product.

Important Points

· Beware of “techno babble.” Usually, but now not constantly, that is used to rip-off you by preserving you in the dark and uneducated. It sounds superb while you hear it, but in case you aren’t knowledgeable, you might not realize what you’re getting. Ask the salesperson or installer to clarify earlier than you make the deal. This is a good check to look if they truly know what they are speaking approximately. Of course, now that you have this file, you will be capable to school them. Either manner, I assume it is just bad manners to speak over someone’s head first of all. Explain what you are pronouncing.

· You want to know and ask the business enterprise all of the above tech specs before you hire. Actually, they have to be extra than happy to provide an explanation for the whole thing to you before you ask (see three traces above).

· Get all of the specifications in writing or get a few sort of tech spec sheet. You need to make sure you have become the exact system hooked up as promised and that you’re paying for.

· You need to know approximately the difficult drive(s) inside the DVR. Specifically:

(a) what number of days of recording do you need/want?

(b) how large are tough drives within the DVR and what number of days recording will you get?


(c) all hard drives cross awful-what, if any, warranty is blanketed?

· Remember, if an installer or shop clerk tries to promote you a digicam with a decision this is below or overestimated for any specific layout (D1, 960H, HD-SDI) you’re getting scammed or dealing with incompetence.

· If you are replacing or upgrading an older CCTV system with an current nice (I.E. 100% copper) RG-59 coax cable infrastructure in location that works/checks just high-quality, you do now not want to pay for brand new cable, wiring and hard work to install it. Remember that.

· And lastly, the above DVR and Camera specifications simplest cover the basics and is a superb location to start and could make sure you are getting what you want, want and what you’re purchasing, but isn’t any way complete.

7.) Contracts (or: Get Everything in Writing)

Real simple: get a written contract of everything from begin to complete regarding the gadget and installation. Some things to consider:

· Everything ought to be spelled out in simple English and pleasant and neat (watch that small print).

· Detailed device components should be listed-what you have become, how many, tech specifications, and so on.

· What approximately tech help? There must be some thing approximately charges, exertions, and so forth.

· Are you leasing or buying?

· CCTV systems are complicated electronics. There might be glitches and there can be issues on occasion. What is the guarantee/guarantee phrases? Do they guarantee your gadget? This could be very important. Obviously, the longer the better.

· As for the above, if your gadget does no longer consist of a PC primarily based DVR, you may be getting a Linux based electronic embedded DVR (the software program is loaded onto the CPU). This method you will need firmware updates for the lifestyles of the DVR. Is this included? Is there a fee? Is it free?

Obviously, these are only a few matters to recall and each CCTV enterprise could have different phrases and each decent corporation will have a written agreement that is truthful. For instance, my contracts are 2 pages lengthy, clean to examine and recognize and lists unfastened cellphone support, free lifetime firmware updates, five 12 months DVR, digital camera and hard power ensures as well as the criminal duties of my enterprise and of the consumer.

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