Katech AIS Test and Analysis System








Land-use Receivers




















Copyright © Katech 2006
Designed by Rebecca Shalfield

Land-use receiver range - Further Details 1

AIS Ship Monitor 1 (ASM1) - single channel
AIS Ship Monitor 2 (ASM2) - dual channel


Technical Details

  • Available with receiver factory installed for channel A (161.975 MHz), channel B (162.025 MHz) or dual channel.
  • Receiver sensitivity is better than 0.5uV pd for 12dB SINAD using the sinewave method.
  • Contains hardware decoder for good demodulation performance.
  • Serial port operates at 19,200 or 38,400 baud, switchable with internal jumper. Factory default is 38,400 baud.
  • AIS message types 1-5 are decoded with current firmware.

Features

  • Is fully tested with Windows ShipPlotter software from COAA. A 21-day trial version is obtainable from here.
  • Dual channel version can be switched to operate on either single channel, for use to avoid temporary interference.
  • Automatically calculated noise floor allowing for change of aerial without readjusting the squelch.
  • Wide variation range software squelch control.
  • Twin LED's for signal status that are also used when setting squelch lower threshold.
  • All software configuration settings are saved in non-volatile RAM. Saved receiver settings are used in Straight NMEA mode.
  • Serial interface on standard 9-way D connector for connection to data terminal or to PC.
  • Serial port outputs AIVDM and AIVDO sentences with calculated checksums in both NMEA modes.
  • Output of AIVDO sentences can be disabled allowing use with external NMEA positioning device via second serial port of PC.
  • Can be used with 'HyperTerminal' in 24-line mode that is supplied with every version of Windows from 95 onwards.
  • Can alternatively be used most reliably with optional Wyse 55 data terminal in 42 line mode.
  • Output pacing option to account for slower graphical display software with buffer-full indication.
  • Switchable hardware handshaking on serial port for high data throughput reliability. Factory default is handshake off.
  • Is most suitable for estuary or port monitoring operations.
  • The most efficient on-board use is by using a computer with two serial ports with port two taking its input from GPS.
  • Firmware is easily upgradeable by competent technician. Updates available to registered users at low cost.

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