SIS-1500 Seafloor Imaging System 3-7SECTION 3 Setup and Deployment Processor Hardware ConnectionsSYNCH IN: DB-15 connector that connects to theSYNCH OUT connector on theworkstation and is used to input the sonardata and the clock signals forsynchronizing the sonar data.VAC IN: AC power input connector that connectsto the AC power source.VAC OUT: AC power output connector that connectsto the monitor.Digital Multiplexer ConnectionsThe Chirplink II Digital Multiplexer connectors and their description and useare listed below.Connector Description And UseDECK CABLE: UHF connector that connects to the75 meter Kevlar reinforced deck cableand is used to input sonar data, towvehicle status information and sensordata from the tow vehicle and to outputpower, commands, and the sonar andresponder keys to the tow vehicle.EXT KEY IN: BNC connector that connects to anexternal source and is used to key thesidescan sonar from the external sourcewhen a 0-5 volt, 100 μsec minimum pulsewidth signal is input. External Triggermust also be selected through theChirpscan3 software.KEY OUT: BNC connector that connects to anexternal source and is used to key theexternal source. The output pulse is a0-5 volt, 100 μsec wide pulse that occursat the start of each ping cycle.
