Four channel DVR for recording, and playing back images from four analog cameras.

DVR record the images from multiple cameras onto a disc drive and allow you to replay any of the sequences at fast speed or slow speed.

You have to fit any size SATA drive to the DVR to allow the storing of images. Any size will do as it loops continuously overwriting the older files. A 250GByte disk will give about 7 days for four cameras recording continuously 24 hours a day before over-writing the oldest data.

If you do not want to record continuously, you can use motion detection or scheduled recordings to limit the amount of info to store on the disk. The DVR stores all the data recorded in its RAM and writes files when the RAM is full, meaning the disk is not active most times. Typically files hold about 30 minutes of information per file.

To operate, you would connect a VGA (computer) monitor to the VGA port which would allow the output of the four camera to be shown continuously in a tiled format allowing you to see all four cameras at the same time. Playback is controlled via a mouse and allows you to search files and playback specific sections of files at normal speed, 2x, 4x and 8x speed, and 1/2, 1/4, and 1/8 speed.

The unit for sale is second hand and we have been using it for the past six months. During this period it enabled us to solve three attempted intrusions just by being able to see what was actually happening when the intruders did not know they were being watched. We have upgraded to a bigger version following this success and are now selling this unit.

If you have cameras at home/office - a DVR makes a huge advance on your security as you are able to find out what exactly happened and prevent it in future.

4 Channels H.264 Digital Video Recorder DVR
VGA port for LCD monitor
Operate by USB Mouse
Motion detection, sensor trigger Alarm, or manual override recording

Main features:
 
Standard H.264 video compression format
16-big true-color semi-transparent graphical menu interface, menu options tip
A variety of recording modes: Manual, timing, movement and alarm
Optimized four-channel simultaneous playback
Multi-functional operation, recording, playback, monitor
Dual steam technology
Support network to implement multi-screen real-time browsing, parameter setting, copy or playback.
Support event classification and precise time search and playback
 
Technical parameters:
 
Video standard: PAL / NTSC selectable
Video compression format: Main profile H.264
Video input / output: BNC 4- Channel input / 1-channel output
VGA output
Audio compression method: 8kHz x 16bit ADPCM
Audio input/output type: RCA 1-channel input, 1-channel output.
Alarm type: Motion detection, sensor trigger, video loss, disk full, disk error.
Alarm input/output 4-channel alarm input / 1-channel alarm output
Display resolution: PAL: D1 (704 x 576) NTSC: D1 (704 X 480)
Display frame rate: Single-channel PAL: 25fps, NTSC: 30fps
Playback resolution: Pal: CIF (352 x 288) NTSC: CIF (352x240)
Recording total frame rate: PAL: 200fps at CIF, NTSC: 240fps at CIF
Recording mode: Start automatic continuous, timing video, motion detection , trigger alarm.
Video playback time: 15/30/45/60 minutes adjustable.
Hard disk: Support one SATA HDD (Maximum capacity 1TB)
Network protocol: Support DHCP, UDP, TCP/IP, DNS, DDNS, PPPOE and other protocols.
Network functionality: Support IE browsing, real-time network monitor and network DVR parameter setting.
USB 1.1 interface: Support mouse operation.
USB 2.0 interface: Support mobile hard disk and USB disk backup and upgrade.
Playback mode: Normal playback, fast forward playback, fast backward playback, manual single-frame slow motion.
Network interface: One JR45 10M/100M self-adaptive Ethernet port.
PTZ control: Built in RS-485 interface, support Pelco-D and Pelco-P protocol.