Furuno 841, 821 manual Table of Contents

TABLE OF CONTENTS

FOREWORD		ii
SPECIFICATIONS		iii
EQUIPMENT LIST		vii
CONFIGURATION		viii
1. PRINCIPLE OF OPERATION		1
1.1	What is Radar?	1
1.2	How Ships Determined Position Before
	Radar	1
1.3	How Radar Determines Range	1
1.4	How Radar Determines Bearing	1
1.5	Radar Wave Speed and Antenna Rota-
	tion Speed	1
1.6	The Radar Display	1

2.26	Watchman	18
2.27	Erasing the Heading Marker	19
2.28	Deselecting Ranges	19
2.29	Displaying Navigation Data During
	Stand-by	19
2.30	Outputting Cursor Position to
	Navigator	20
2.31	Displaying Cursor Position, Range
	and Bearing to Cursor	20
2.32	Visual Alarm Indications	20

3. INTERPRETING THE DISPLAY

3.1The Radar Wave and Radar Horizon . 21

3.2Target Properties and Radar Wave

	Reflection	21
3.3	Range Resolution	22
3.4	Bearing Resolution	22
3.5	False Echoes	22
3.6	Nautical Chart and Radar Picture	24

2. OPERATION
2.1 Control Description		3
2.2 Display Indications and Markers		4
2.3 Turning the Radar On and Off		4
2.4 Transmitting		5
2.5 Selecting the Range		5
2.6 Adjusting LCD Backlighting and
Display Tone		5
2.7 Adjusting Control Panel Brilliance		5
2.8 Adjusting GAIN, STC, A/C RAIN
and FTC		6
2.9 Tuning the Receiver		7
2.10	Measuring the Range	8
2.11 Measuring the Bearing		8
2.12	Menu Operation	9
2.13	Selecting the Display Mode	11
2.14 The Window Display		12
2.15	Selecting the Presentation Mode	12
2.16	Guard Alarm	13
2.17	Suppressing Radar Interference	14
2.18	Suppressing Noise Interference	15
2.19	Selecting Pulselength	15
2.20	Off Centering the Display	15
2.21	Echo Trails	16
2.22 The Navigation Data Display		16
2.23	Echo Stretch	17
2.24	Selecting Unit of Measurement
	for Range	18
2.25	Selecting Bearing Reference	18

4.MAINTENANCE & TROUBLESHOOTING

4.1	Safety Information	25
4.2	Preventative Maintenance	26
4.3	Replacing the Fuse	26
4.4 Troubleshooting		27
4.5	Self Test	28
5. INSTALLATION
5.1 Antenna Unit Installation		29
5.2	Display Unit Installation	36
5.3	Installation Check List	39
5.4	Initial Adjustment of Picture	40
5.5	Displaying the Installation Menus	40
5.6	Entering Initial Settings	41
5.7	Relative Bearing Alignment	41
5.8	Sweep Timing	42
5.9	Closing the Installation Menus	42
5.10 Signal cable connection		44
OUTLINE DRAWINGS		D-1
INTERCONNECTION
DIAGRAMS		S-1
SCHEMATIC DIAGRAMS		S-3
Declaration of Conformity

i