DVR Security System Review

Here we have another surveillance system created by Lorex, the system is part of the Lorex L104 range and it has a very compact design. You can attach up to four security cameras to the system and four are included with its contents, the cameras are all identical, their specific model being the Lorex SG7518. Before taking a look at the cameras lets take a look at the functions of the DVR and its inner hardware.

Cameras are attached to the DVR through the four BNC connectors situated at the back of the device, the DVR also has a BNC video output for connecting it to a television and a VGA output for connecting it to a monitor. The maximum recording speed of the DVR is modest at 30 frames per second and it is compatible with both PAL and NTSC video signals.

In NTSC mode the DVR can record video at a maximum pixel resolution of 640*224 and PAL images offer a slight improvement, that being a maximum image resolution of 640*272. The DVR uses MJPEG video compression and has the capacity for one internal hard drive for storing camera footage, the hard drive included with the Lorex DVR has a 500 gigabyte capacity.

The Lorex DVR has an audio input and an audio output that can be used to set up an intercom system at the entrance of your premises, the systems USB port enables you to connect it directly to a personal computer. Video recording can be scheduled or you can use the motion detection capabilities of the Lorex system to determine when its starts and stops recording camera footage. If necessary you can set the DVR to record surveillance camera footage continuously through the day.

Moving on to the cameras included with the DVR, these have a ¼ inch interline transfer color CCD image sensor and an effective pixel range of 510*492. The cameras have a shutter speed range between 1/60 – 1/10,000 seconds, the horizontal resolution of the cameras with the DVR is 350 TV lines. The cameras have automatic white balancing, an internal synchronization and are capable of capturing images in low level lighting, they also have a built in microphone.

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