![]() In operation, the multiplexer handles standard CoaXPress transmission rates and provides bidirectional communication for video, control signals and PoCXP (Figure 2).įigure 2: Kaya Instruments' CoaXPress multiplexer can simultaneously stream data from up to four CXP camera channels over a single coaxial cable. Because of this, Kaya Instruments has introduced a CoaXPress multiplexer that can simultaneously stream data from up to four CXP camera channels over a single coaxial cable. In some applications, where multiple, lower speed cameras need to be deployed, a multiplexer can be used to reduce the number of CXP ports required. Active Silicon, for example, offers its Firebird series of CXP PCI Express frame grabbers with one, two and or four CXP ports while companies such as BAP Image Systems (Erlangen, Germany Bitflow (Woburn, MA and Matrox (Dorval, Quebec, Canada offer boards with one and two CXP ports (Table 1). Alternatively, single high-speed four port cameras running at data rates of up to 25Gbps can be supported with four channel CXP frame grabbers.īecause of the need to offer systems integrators a range of options, frame grabber vendors currently offer products that support one, two or four CXP ports. ![]() ![]() Dual or quad CXP port frame grabbers can support two or four cameras running at this data rate. For example, single camera implementations running at speeds of up to 6.25Gbps may require a single frame grabber with one CXP port. The Core can be implemented on Altera or Xilinx FPGAs and provides 32-bit interfaces for data and control to other FPGA logic (Figure 1).įigure 1: The CoaXPress AXI IP Core from Mercury Computer Systems supports a single downlink of up to 6.25 Gbps for image transfer and a 20Mbps uplink for communications and control.īecause the standard is scalable, multiple channels can be used to either support multiple cameras or high speed cameras with multiple CXP ports at speeds greater than 6.25Gbps. The CoaXPress AXI IP Core from Mercury Systems, for example, supports a single downlink of up to 6.25 Gbps for image transfer and a 20Mbps uplink for communications and control. Although many such manufacturers have designed their own FPGA code for such tasks, intellectual property (IP) to aid development of CXP-based FPGA camera and frame grabber interfaces is also available from companies such as Mercury Systems (Chelmsford, MA Sensor to Image (Schongau, Germany Kaya Instruments (Haifa, Israel and Demand Creation (Nippa Town, Japan ). While the EqcoLogic chipset forms the physical layer of the CXP standard, camera and frame grabber vendors employ FPGAs for control, protocol implementation and serialization and deserialization. According to Eqcologic, these devices support up to 58m of RG11 co-axial cable at 6.25 Gbps. ![]() This driver/equalizer combination forms a bidirectional full duplex communication link over a single coax cable and transports 6.25 Gbps over the downlink channel and 20.833 Mbps over the uplink channel. ![]() Physical interfaceĮvery CXP design features the EQCO62T20 (camera) or EQCO62R20 (frame grabber) CoaXPress transceiver chipset from EqcoLogic. With a 20.833Mbps uplink for communications and control, the standard also allows 13W of power to be supplied over each cable in Power-over-CXP mode. Using a single coaxial cable, downlink speeds of up to 6.25Gbps per cable can be achieved. The success of the standard can be attributed to a number of factors.Īs an asymmetric point-to-point serial image transmission standard, the CXP standard is scalable. With over thirty vendors offering cameras, frame grabbers and peripherals, the CoaXPress (CXP) standard has become the de-facto high-speed machine vision interfaceįirst proposed over six years ago, the now well-established CoaXPress (CXP) camera to computer interface was originally developed by a consortium of Adimec (Eindhoven, The Netherlands Active Silicon (Iver, England EqcoLogic (Brussels, Belgium Components Express Inc (CEI Woodridge, IL AVAL DATA (Tokyo, Japan and NED (Tokyo, Japan Awarded the Vision Award at the VISION 2009 trade fair, the standard has now been adopted by over thirty manufacturers of cameras, frame grabbers, and peripheral products. ![]()
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