August 8, 2009

The Relationship Between The Camera TVL And The Resolution Of The DVR

Here is a very common question. How many TVL should the camera have to best use the resolution of my DVR? This is one of the most misunderstood relationships in CCTV. The resolution that the DVR records in refers to the SIZE of the image being recorded. So CIF resolution (360×240) and 4CIF resolution (704×480) […]
August 7, 2009

The Basics of RS485 and PTZ Control

Almost every DVR has the ability to control a multitude of devices using the RS485 protocol. RS485 uses 2 wires to send and receive data to and from these devices. All the devices in an RS485 “network” are connected in parallel with one another. This is a very simple form of communication and relies mainly […]
August 7, 2009

License Plate Capture Basics

As a security dealer, one of the most common requests you will receive from your customer is license plate capture. License plate capture is often confused with license plate recognition so I will first define the difference between the two. License Plate capture refers to the ability of the security camera to capture an image […]
August 7, 2009

CCTV Lens Technology

One of the main considerations when installing a security surveillance system is the lens.  Without lenses, the system would be useless.  Most cameras come with a choice of lenses, while box type security cameras require you to choose the lens and purchase it separately. When choosing a lens, there are a few things to keep […]
August 7, 2009

Security DVRs and Internet Connectivity

The introduction of digital video recorders to the security surveillance industry allowed for a whole range of additional features and functions that were previously unavailable. With video cassette recorders, not only did you have to search through hours of recorded footage just to find that one small event, but you had to physically be in […]