Technical tips to help you with common CCTV problems.
Need to calculate an estimate of the HD size a customer will require? Alien DVR offers a simple program that allows installers a fast way to calculate an estimate of the HD size a customer will require based on the number of cameras they want, recording resolution and frame rate to be used. It’s free…
How To Calculate Your CCTV Lens Requirements Here is a step-by-step guide on how to calculate your CCTV lens requirements. This guide is also available for download at www.systemq.com Tip No. 268.
Understanding the different types of lenses available… In order to pick the right lens for the right location, it is useful to understand the main differences in CCTV lenses. • Fixed Iris Lens – the lens can not be adjusted to alter the amount of light that it lets through to the camera. • Manual Iris…
IR LEDs when built into CCTV cameras can give illumination in areas with no other light source. However it’s really important to understand that the actual output power of the built in IR LEDs is very low, typically 3-10 watts. If you think of how bright a 10w bulb is, you will quickly come…