Furuno CH-270 - Page 7

TABLE OF CONTENTS
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2.13 Horizontal Menu Overview....................................................................................... 2-23
2.14 Interpreting the Horizontal Display ........................................................................... 2-25
2.14.1 How the horizontal mode picture is painted ................................................... 2-25
2.14.2 Sample echo displays ................................................................................... 2-26
2.14.3 Combination display examples...................................................................... 2-30
3. VERTICAL SCAN MODE.............................................................................................3-1
3.1 Operational Overview ................................................................................................ 3-1
3.2 Displaying Vertical Scan Mode Display...................................................................... 3-2
3.2.1 Typical vertical scan mode display .................................................................. 3-2
3.2.2 How the vertical scan picture is painted........................................................... 3-3
3.2.3 Horizontal/vertical scan display ....................................................................... 3-4
3.3 Choosing the Range .................................................................................................. 3-6
3.4 Choosing Train Center............................................................................................... 3-6
3.5 Choosing Display Sector............................................................................................ 3-7
3.6 Choosing Sector Center............................................................................................. 3-8
3.7 Choosing the Tilt Speed............................................................................................. 3-9
3.8 Finding Echo Position with the Cursor ....................................................................... 3-9
3.9 Event Marker ........................................................................................................... 3-10
3.9.1 Entering an event marker .............................................................................. 3-10
3.9.2 Deleting all event markers............................................................................. 3-11
3.10 Depth and Horizontal Range Markers...................................................................... 3-11
3.11 Adjusting the Picture................................................................................................ 3-12
3.11.1 Displaying weak echoes clearly..................................................................... 3-12
3.11.2 Suppressing noise and interference .............................................................. 3-14
3.11.3 Gain adjustment ............................................................................................ 3-14
3.11.4 Resolution color ............................................................................................ 3-15
3.11.5 Suppressing clutter........................................................................................ 3-15
3.11.6 Choosing horizontal range expansion factor.................................................. 3-16
3.12 Interpreting the Vertical Scan Display ...................................................................... 3-17
3.12.1 Sample echo displays ................................................................................... 3-17
4. ECHO SOUNDER MODE.............................................................................................4-1
4.1 Operational Overview ................................................................................................ 4-1
4.2 Typical Echo Sounder Display ................................................................................... 4-2
4.3 Choosing the Range .................................................................................................. 4-3
4.4 Train Direction ........................................................................................................... 4-4
4.5 Choosing Tilt Angle.................................................................................................... 4-4
4.6 Choosing Picture Advance Speed ............................................................................. 4-4
4.7 Measuring Range by Cursor ...................................................................................... 4-5
4.8 Event Marker ............................................................................................................. 4-5
4.8.1 Inscribing the event marker ............................................................................. 4-6
4.8.2 Deleting all event markers............................................................................... 4-6
4.9 Range Marker............................................................................................................ 4-7
4.10 Adjusting the Picture.................................................................................................. 4-8
4.10.1 Displaying weak echoes clearly....................................................................... 4-8
4.10.2 Finding echo strength (A-scope display)........................................................ 4-10
4.10.3 Gain adjustment ............................................................................................ 4-11