DATASONICS SIS-1500 System Manual
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Contents
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SIS-1500 Seafloor Imaging System 4-5SECTION 4 Theory of Operation Topside Processor ElectronicsWorkstationAlong with the high resolution monitor, the keyboard, and the pointing device,the workstation comprises the following integrated components:Host CPU. A Pentium based processor with serial communicationsports COM1 and COM2 and the parallel port LPT1.SCSI interface. Connects to the internal hard drive and the optionalhigh density storage devices.Serial I/O board. Provides two additional communications ports,COM3 and COM4.Graphics engine. Drives the high resolution monitor.Synchronizer board. Inputs and formats the sonar data.DSP engine. Processes the sonar data.Integrated IDE controller. Interfaces with the 3.5" floppy drive.1.44 Mbyte floppy disk drive. Provides an alternate medium forsystem boot-up, the loading of programs, and the making of backupcopies.The workstation interfaces with the digital multiplexer through its TELEMserial port and its CLOCK IN and DATA IN connectors. The workstation’sPentium based host CPU runs the Chirpscan3 software and provides theCOM1 and COM2 serial communications ports and the LPT1 parallel port.The COM1 port, which is the TELEM serial port, outputs the downlinkcommands and inputs the uplink vehicle status information and sensor data.The COM2 port connects to the pointing device on the keyboard, and theLPT1 port connects to an optional printer. The Synchronizer board inputs thesonar data and the clock signals from the DATA OUT and CLOCK OUTconnectors, respectively, on the multiplexer. Using the clock signals, theSynchronizer board extracts the sonar data and formats the data into discretepackets for output to the DSP engine. The DSP engine is a dual TMS320C40,60 MHz digital signal processor (DSP), which performs the match-filterprocessing of the sonar data. The Graphics engine drives the high resolution1280 x 1024 color monitor. The SCSI interface services up to seven internalor external devices, including the installed hard drive and the optionalmagneto-optical drive. The Serial I/O board provides the COM3 and COM4serial communications ports, where COM3 receives the navigation input andCOM4, which is the AUX I/O serial port, is a spare serial port. |
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