Gray-scale LCD radar (Furuno® 1623 as prototype)

Features :
  • gray-scale LCD screen
  • menu-driven control
  • gain, brilliance, sea, rain and FTC controls
  • range from 0.125 to 24 NM and range rings
  • one EBL/VRM
  • display shift
  • zoom
  • heading line on/off
  • wakes
  • echo stretch
  • watchman
  • one guard zone with alarm
  • distance run
  • programmed keys
  • navigation data windows (interfaces from simulators of compasses, GPS, echo sounders etc. in textual form)
  • Function How to implement
    switch on POWER/BRILL button, single press, after magnetron warming up, goes into standby
    switch off POWER/BRILL button, press and hold
    start transmitting from standby POWER/BRILL button, press momentarily; BRILL/CONTRAST adjustment window appears; press MODE; press MENU/ESC to close the window
    adjusting brilliance POWER/BRILL button; BRILL/CONTRAST adjustment window appears; use trackpad to change values; MENU/ESC to quit
    changing range RANGE button
    gain, sea, rain GAIN button; the menu appears, use trackpad to change values; press GAIN again to switch to sea clutter adjustment; GAIN again to switch to rain clutter control; MENU/ESC to quit
    VRM/EBL move cursor by trackpad, the window at the lower right corner displays EBL/VRM to cursor position
    VRM (variable range marker) MARK button, MARK MENU appears; press ALARM to display VRM ring (dashed line); use trackpad to change its radius; VRM readout is at the lower left corner; to fix VRM, press MENU/ESC; to erase VRM, press ALARM button twice with MARK MENU on screen
    EBL (electronic bearing line) MARK button, MARK MENU appears; press GAIN to display EBL line (dashed line); use trackpad to change bearing; EBL readout is at the lower left corner; press MENU/ESC to to fix EBL; press GAIN button twice with MARK MENU displayed to erase
    display shift place cursor to position of the display centre; press MODE button to show DISPLAY MODE menu; use trackpad to select SHIFT menu item; press MENU/ESC to close the menu
    zoom zoom is used to enlarge a selected part of display; move cursor to the centre of zoom; press MODE button to show DISPLAY MODE menu; select ZOOM with trackpad; exit by MENU/ESC
    interference rejection is used to suppress interference from other radars; press MENU and select INT REJECTION by trackpad; press trackpad right arrow to display submenu; select a value by trackpad up and down arrows; exit submenu by trackpad left arrow
    echo stretch is used to enlarge radar marks from point objects; press MENU and select ECHO STRETCH by trackpad; press trackpad right arrow to display submenu; select a value by trackpad up and down arrows; exit submenu by trackpad left arrow
    FTC - fast time constant is used to suppress far rain clutter; use MENU button to change
    noise rejection is used to suppress white noise (speckles); use MENU button to change
    heading line is used to hide heading line temporarily; use MENU button and trackpad to select; press right trackpad arrow to hide; heading line appears again when trackpad is released
    wakes (trails) are afterglows of target echoes; are used to monitor target movements; use MENU button to change wake lengths
    guard zone is a sectored zone around the ship used to issue alarms when a target comes in or out; use trackpad to set the first corner of guard zone; press ALARM; with trackpad, stretch zone to the desired shape; press MENU/ESC; to silence alarm, press ALARM button once; press and hold the button to erase guard zone
    watchman watchman initiates transmission for a short period of time (1 minute) to check if a target has entered or exited the guard zone; press MENU/ESC, find WATCHMAN and select watchman inactivity interval; press MENU/ESC to exit
    programmable keys PROG button acts as a menu shortcut key; use MENU/ESC to assign a parameter to the PROG key; the selected parameter is marked by P character in the menu
    setting navigation data windows are windows displayed at the screen, like depth, clock, position, course speed etc. transferred from external navigation equipment; use MODE button to set NAVigation DISPlay on; use MENU/ESC button to set NAVigation DATA to set the number of items to display; set which windows to display by (1) go into standby by pressing POWER/BRILL with subsequent MODE (2) hide the menu by MENU/ESC (3) press trackpad to set what to display on which window