CCTV FAQs

Surveillance Questions

1. What is CCTV?

CCTV (Closed Circuit Television) is a visual surveillance technology designed for monitoring a variety of environments and activities. CCTV systems typically involve a fixed (or “dedicated”) communications link between cameras and monitors.

So Why Use CCTV:

a. BARS & NIGHTCLUBS – Can monitor trouble brewing & “the hand in the till”. It could also be used to calm and restrain drunken & aggressive customers by displaying them on the pub Television. Remote Monitoring

b. SHOPKEEPERS – To keep an eye on stockrooms, cash registers and light fingered customers.

c. SMALL CAR PARKS – These can be inexpensively protected from unwanted theft & vandalism, encouraging people to choose your business or giving staff peace of mind.

d. RECEPTION AND PUBLIC AREAS – Protect both staff & customers and even reduce staff levels. Useful as a “duty of care” measure.

e. AT HOME – See who is at the front door (record any bogus callers.). Protect your vehicles & garden. EVEN automatically record any visitors or intruders, whether you are home or not. Give elderly people confidence & reassurance.

f. IN SMALL SCHOOLS – Provide quality “within budget” CCTV security to schools that cannot afford and do not require large complicated systems.

g. FACTORIES – To safely and remotely monitor hazardous area or plant breakdowns, monitor staff on night shifts etc.

2. What are the advantages of digital recording?

Three main advantages:

* Much better quality on replay

* Very easy to find an incident (in most cases, just dial in the time and date to get instant replay). No more endless hours of searching through tapes.

* No more remembering to change the tape.

3. What is the difference between a wired and a wireless camera? – Wired cameras have a video cable that runs from the camera to your recording or viewing device such as a DVR, VCR or monitor. Wireless cameras have a built-in transmitter that sends the video signal to a receiver. The receiver connects to your recording or viewing device.

4. What is CCD?

CCD is used in professional cameras because of it’s high resolution quality and it’s ability to record in low-light situations. CCD is basically a small silicon chip that receives light and turns it into voltage variations which makes up an image. It’s usually measured in inches with 1/3″ CCD being the standard. They are higher priced but are great for

5. What is a Quad?

A Quad splits your monitor into 4 sections allowing you to view 4 cameras at once.

6. Will a Quad allow four cameras to record at the same time?

Yes you can record all four cameras at the same time. You also can record using a switching monitor, which will record the camera that is showing at that moment.

7. What is the difference between a DVR and a VCR?

A Digital Video Recorder (DVR) system records high resolution digital images to a hard disk drive (HDD) and CCTVeliminates are stored digitally, the image quality will not degrade overtime, as would a VHS tape when recorded over multiple times. The time-saving search capabilities of a DVR will enable the user to locate the desired video clips via user defined parameters (camera, time, date, etc.) versus the fast forward and rewind functions of a VCR. A DVR can be accessed remotely from anywhere in the world using the Internet.

8. How many hours will a DVR record?

The amount of time a DVR will record for is based on the size of the DVRs hard drive, the number of cameras recording and the number of frames per second it is recording at. One camera recording in Real Time uses 1 GB per day. So a 16 camera system will use 16 GB in one day.

9. What is a DVR card?

DVR Cards enable the user to convert their computer into a Digital Video Recorder. The DVR Card(s) is typically installed in an available PCI slot of a computer. DVR cards are bundled with video surveillance software which allows the user to record and display multiple cameras simultaneously from the camera site or a remote location.

10. What is a Plug and Play connection camera?

It is an RCA Video plug and a power plug on the camera for easy connection to VCR or TV. This is done by running the RCA (Aux) line into the VIDEO IN of the VCR or TV. The TV or VCR must be set on the correct channel to view the VIDEO IN picture.

11. How many cameras can I hook up to one TV?

You can hook up as many cameras as your TV has inputs. Most TVs have 2 inputs but when using a quad you can hook up four cameras.

12. Do you need a VCR to record or will the cameras record?

You must have a VCR or DVR if you want to record.

13. Between what temperatures is it safe for cameras to operate in? Safe for B/W cameras to operate between -23°C to + 50°C or -10ºF to +122ºF Safe for color cameras to operate between -23º C to +40ºC or -10ºF to +104ºF It is safe to store cameras between -30ºC to +70ºC or -22ºF to +158ºF

14. What is the operating voltage of a camera?

Our cameras range from 9 volts (CMOS) to 12volts, and also 24 volt professional models.

15. What is a varifocal lens?

A varifocal lens is one where the focal length of the lens can be varied. This is a fancy way of saying it is a zoom lens. Most varifocal lenses have, and in almost all circumstances should have, an auto iris feature.

16. What is a fixed lens?

A fixed focal length lens cannot zoom. The focus is fixed. A fixed focal length lens usually allows more light to pass through the lens at a given focal length than a varifocal, or zoom lens. This can be important in low light situations.

Remote Monitoring

Remote monitoring is available with new installations, and most existing systems can be upgraded for this feature.

From your home You needn’t be there to know what’s happening

View images from your own home your system can be extended to provide a link via ISDN phone lines, Broadband, or radio link, to enable you to keep an eye on things.

Minimise your risk of being attacked if the alarm goes off at night, you can see whether there is an intruder still on your premises.

Remote MonitoringCentral monitoring This is a cost-effective way of having your premises guarded.

Your CCTV system is connected to a Digital Video Transmitter which compresses the images and sends them over a high-speed ISDN, GSM or standard PSTN telephone lines to a guarding station.

Pictures are received at the monitoring station and displayed on video monitors.

In the event of an alarm being activated the pictures are recorded digitally for evidence, and the operator can deliver an audio warning. This is usually enough to deter the intruder and stop the crime in its tracks.

The guards will if necessary call the police and or yourself to your site.

Call us for a free survey and estimate.

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