STM-1 Surface Station

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The STM-1 surface station plugs into a 5” drive bay of a personal computer For use with notebook computers, it can also be mounted externally. Mount the station aboard your support vessel to track up to ten divers, ROVs, AUVs, or a combination of mobile targets. The surface station shows the position, depth, and telemetry data (such as remaining diver air supply or ROV battery charge level). Use the digital communication capability to exchange brief messages with the divers and coordinate their activities, or send commands to your vehicle. The STM-1 can also be used to control and receive telemetry from our subsea instrumentation systems. A cable mounted sonar transducer connects the surface station to the underwater world.

Technical Specifications

STM-1

• Size: 216 mm x 146 mm x 38 mm(8.5"x5.75"x1.5") Compatible with standard half-height 5" drive bay on personal computers. May be install in a drive bay or externally.
• Weight: 1100 (50 ounces) in air
• Operating Temp: 0-50 degrees Celsius
• Data I/O: Controlled via IBM compatible PC through serial data link.
• Status Indicator: Red Blinking LED on front panel
• Microprocessor: MC68HC11, 1 MHz
• Memory:
• 256 Kbyte of battery backed-up SRAM for user data
• 2.5 Kbyte of volatile SRAM (stack space)
• 256 Kbyte of permanent FLASH memory (for DiveCode)
• 24 KByte of EPROM (firmware storage)
• SONAR connector : 3 5-pin waterproof connectors, provide links to external omni-directional transducers
• Data Interface: RS232C, DB9 and 10-pin ribbon cable connectors on back panel
• Sonar transceiver:

 

• 0-60 Watt RMS output in transmit mode
• RX sensitivity 7 microvolts RMS @ 6 dB S/N
• 4th order programmable switched capacitor filter
• Digital frequency synthesis, tunable in 0-100 KHz range, resolution 1.5 Hz
• Sonar Transducers: Cable mounted omni-directional, 34-41kHz
• Sonar Range: 100-500 meters depending upon sea conditions
• Sonar Modulation: 10-channel multi frequency-shift keying (MFSK)
• Sonar Bitrate: 15-150 bit/sec
• Sonar Navigation: Long baseline and short baseline principal supplemented by transducer derived depth information yields 3d position information. For simple applications, 'two station' mode yields distance to remote station, bearing is determined by manual 'signal peaking'. Navigation range of 100-500 meters depending upon sea conditions. Distance measurement repeatability +/- 0.15 meter (system limit)
• Power Consumption:

 

• 9V to 12V supply voltage May be powered by PC or external (DT1-ACDC) power supply
• 0.01 mA in sleep mode
• 120 mA in sonar receive mode
• Up to 2 Ampere in high-power transmit mode
• Battery: 1200 mAh NiMH battery, 90 minute fast charge, optional external battery for 12 times longer batter life.