Signal cable - Import export

SpaceWire link is used to enable the reliable transmission of data at high speed (between 2 Mb/s and 400 Mb/s) from one unit to another. SpaceWire links are full-duplex, point-to-point, serial data communication links. Advantages Near constant total drive current (+3,5 mA for logic 1 and -3,5 mA for logic 0) which decreases switching noise on power supplies. High immunity to ground potential difference between driver and receiver. LVDS can tolerate at least ±1 V ground difference. High immunity to induced noise because of differential signalling normally using twisted-pair cable. Low EMI because small equal and opposite currents create small electromagnetic fields which tend to cancel one another out. Not dependent upon particular device supply voltages. Simple 100 Ohms termination at receiver. Power consumption is typically 50 mW per driver receiver pair for LVDS compared to 120 mW for ECL or PECL.