Surveillance Cameras

IP (Ethernet) Cameras

The market for security (or CCTV) cameras continues to grow at a considerable rate. Historically, all such cameras were analog and were connected to monitor and storage systems via coaxial cables. There is now a rapid shift to digital cameras and digital image recording. The reasons are clear: better imaging, intelligent image processing and the benefits of fully networked integrated solutions. The digital choice is usually "IP" cameras, operating at 100Mbit/s, that connect to DVR's or video servers over Cat 5 or Cat 6 Ethernet cable.

But why waste perfectly functional coax cabling, simply to go digital? With the EqcoLogic EQCO875SC transceiver chip, IP cameras can use COAX cabling to transmit back to the DVR or server. The new approach from EqcoLogic also allows Power over Ethernet (PoE) to be bridged over the COAX link to provide ample power for the camera. EqcoLogic offers reference designs for integration of the EQCO875SC device in adaptors or directly into cameras and DVR's. The reference design also provides the circuitry to port PoE power from the DVR to the camera – over coax. Distance covered 180m for RG6 cable and 250m for RG11 cable.

HDCCTV Standard

There is a new approach for higher performance surveillance cameras. The so-called "HDCCTV" standard uses products and technologies from the digital TV broadcast sector to send surveillance images over COAX. Speeds are typically expected to be 1.5Gbit/s initially, with an upgrade path to 4.5Gbit/s. EqcoLogic's EQCO30R5 equalizer was developed for the TV Broadcast industry and is ideal to get maximum cable range is HDCCTV applications. This device supports up to 3.0Gbit/s transmission speed and, at 1.5Gbit/s, can support cables of up to 200 metres.