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What is a Digital Video Recorder, often referred to as a DVR?
A DVR is an older style technology that connects with cameras over COAX cable. COAX is generally quite thick - around 6 to 8mm in diameter - and is black. The cameras also need a separate source of power of either 12VDC or 24VAC so they also have a small power cable running to them. When CCTV was first created, everything ran over COAX and a separate power cable. The IP digital era had not really been created yet, so the industry was limited to basic video transmission over COAX (just like your TV aerial on the roof).
COAX "can" transmit a digital signal, but it's not very good at it. It's much better transmitting an analogue signal. In the old days, the analogue signal was low resolution and pretty ordinary but these days we can transmit VERY high definition analogue signals.
Hikvision was the creator of a transmission signal called HD-TVI or High Definition Transport Video Interface. The Hikvision HD-TVI range of DVR's (recorders) and CCTV cameras has been a major revolution in the CCTV industry and you can now run genuine 4K Ultra HD over COAX cables, which is a mind blowing leap forward
So if you have an existing building with COAX run everywhere because of the old, often dysfunctional, CCTV system you can literally just remove the old equipment and replace it with Hikvision HD-TVI. It is so easy and the result is unbelievable.
Listed below re the incredible Hikvision HD-TVI DVR's which we supply and support. If you get stuck or need a hand please CLICK HERE to contact us. Our sales and support people will call you as soon as possible and it's usually within the first hour.