Q1. How does a CCTV Camera work?
Q2. What does TVL or Television Lines mean?
Your camera’s lens is the defining factor in quality and cannot capture detail beyond its own capabilities. If you had both a 420TVL camera and a 700TVL camera which both had the same lens then the 700TVL camera wouldn’t be able to see much further than the 420TVL. You may have a slightly better picture due to the increase in resolution but if you can’t read a number plate at 20m using the 420TVL then the problem is the lens not the resolution.
Q3. Do I need a fixed lens or Varifocal?
A varifocal or vari lens camera has the ability to optically zoom in on an area. The variable focal length can be used to change from a wide angle view covering a large area to a narrow focal view to centre on a particular area at long or short range. This is a popular choice as it is versatile and can easily be adjusted to suit your needs.
Q4. How does the lens focal length affect the image?
Essentially this factor determines how much you can optically zoom in and out on a varifocal camera.
Q5. What are infra-red LEDs
Q6. Will bright daylight damage an infra-red camera’s LEDs?
Q7. What are the different types of CCTV Camera available?
Dome cameras are generally the most popular indoor choice of cameras thanks to their compact size options, motorised 360 degree rotation options as well as being sturdy. Generally, there are three main types of dome camera available.
Internal Dome cameras
Internal dome cameras feature an additional ‘dome’ housing which is an advantage as you can’t knock the lens. This additional house can also come in a ‘blacked out’ form which can be useful for hiding which direction your camera is pointing.
Eyeball or “Eye” Dome cameras
Eye dome cameras are usually a sturdier choice with many featuring armoured housing which allows them to be vandal resistant. They also have superior infra red illumination.
PTZ/Speed Dome camera
These cameras can come in both open and internal styles, and feature electronic motors which can be controlled to look around or even zoom in and out using a controller. They tend to be reserved for use only in large scale developments.
Featuring a bullet-like shape, these cameras are the classic choice. All of our bullet cameras feature infra red illumination. They are suitable for indoor and outdoor use and can range from small, plastic housing up to large heavy duty armour-cased cameras.
Similar in appearance to bullet cameras, these cameras generally feature a square casing, hence the name.
These cameras are small, easily hidden or disguised cameras, which might be a better, more discrete choice for your home or business. Despite their small size, our covert cameras are capable of a professional quality video feed.
Q8. How long will my system record for?
Q9. What happens when my DVR is full?
Q10. Can I make my DVR record for longer?
In a normal domestic situation, using motion detection could add weeks to your storage time, but there’s a price to pay. You’ll need to have the sensitivity on your motion detection quite high to ensure that you don’t miss anything. Increasing the sensitivity will mean that you will also record rain and possibly wind, especially if your cameras point to anything that moves in the wind.
Q11. What is remote viewing of CCTV?
Q12. How does remote viewing of CCTV work?
SENDER: The sender comprises of one of more cameras connected to a video streamer. The video streamer literally streams the video signals over either a local network or the internet. In order for the receiver to be able to find the sender, it is allocated a unique IP address or a URL (web address).
RECEIVER: The receiver comprises either a PC/laptop (connected to the internet) or a tablet/smart phone with an application installed. The user enters the allocated IP or URL address and if required, a user name and password.
Q13. Do you charge extra for remote viewing?
Q14. Can this be used with my current Broadband connection?
Q15. How many CCTV Cameras will I need to have installed?
Q16. Can having CCTV Cameras installed reduce my home insurance premiums?
Visonic Intruder Alarms
Q1. What is the output of the wall-mounted siren in decibels?
Q2. How long will the siren sound for when the alarm is triggered?
Q3. Can I use more than one external siren on my Control-panel alarm?
Q4. How is the external siren powered?
Q5. How and when will I need to change the batteries in the siren?
Q6. How many telephone numbers can be stored on the Visonic PowerMax control panel?
Q7. I have a shed / garage, will I be able to use a detector in this location?
Q8. I have pets at home. Is it likely they will trigger my alarm and if so, how can I overcome this problem?
Q9. Why does the alarm not trigger when I walk in front of a PIR?
Q10. What is the maximum movement detection range of a Visonic PIR?
Q11. Should the red light flash on my PIR?
Q12. Can I test my new alarm without annoying my neighbours?
Q13. Are all Visonic alarms completely wire-free?
Q14. I wish to expand my existing Visonic alarm. How many detectors can I use in total, and where can I purchase additional accessories from?
Q15. How often will I have to change the batteries in my alarm system?
Q16. I have a large household with many family members, young and old, entering and exiting the property at varying times of day. How can I overcome this?
Get in Touch
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29 Great George St