Furuno
841, 821
manual
Troubleshooting
Specifications
Install
Guard Alarm
Maintenance
Configuration
Option connector
Adjusting A/C Rain
Entering Initial Settings
Resolution
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Contents
Marine Radar
First Edition AUG
Safety Arrangements
Electrical Shock Hazard
Ground both the Display Unit and the Antenna Unit
Useable Environment
Table of Contents
Features
Foreword
SPECIFICATIONS- Model
Antenna Unit
Transceiver Module contained in radome
Display Unit
Power supply & power consumption
Protection features
Warm-up time Modulator switching method
Vibration
Ambiont temperature
Receiver front end MIC Michoeave IC Bandwidth 7 MHz Duplexer
Interface Nmea Model 821/841
Page
Configuration
Model 821/841
Principle of Operation
How radar works
Operation
Control Description
Display Indications and Markers
Turning the Radar On Off
Adjusting LCD Backlighting and Display Tone
Adjusting Control Panel Brilliance
Transmitting
Selecting the Range
Adjusting GAIN, STC, A/C Rain and FTC
STC MAN Auto
Tuning the Receiver
Adjusting A/C Rain
Adjusting FTC
How to tune manually
Measuring the Range
Measuring the Bearing
Menu Operation
Target on collision course with your vessel?
Menu description
Selecting the Display Mode
11 Display modes
CU course-up
Selecting the Presentation Mode
Window Display
Guard Alarm
WPT-UP waypoint-up
Suppressing Radar Interference
Guard
Selecting Pulselength
Suppressing Noise Interference
Off Centering the Display
Echo Trails
Navigation Data Display
Echo Stretch magnifying long range echoes
Press the Menu key Select Nav Data and press the ENT key
Watchman
Selecting Unit of Measurement for Range
Selecting Bearing Reference
Displaying Navigation Data During Stand-by
Erasing the Heading Marker
Deselecting Ranges
Displaying Cursor Position, Range and Bearing to Cursor
Visual Alarm Indications
Outputting Cursor Position to Navigator
Interpreting the Display
Radar Wave and Radar Horizon
Target Properties and Radar Wave Reflection
Super-refraction
False Echoes
Bearing Resolution
Range Resolution
Multiple echoes
Nautical Chart and Radar Picture
Blind and shadow sectors
Maintenance & Troubleshooting
Safety Information
Forming any maintenance or
Troubleshooting procedure
Preventative Maintenance
Replacing the Fuse
Troubleshooting
Troubleshooting table
Self Test
Self Test
Installation
Antenna Unit Installation
Vent tube
Removing packing materials
Mounting platform
How to fasten the radome base To the mounting platform
Ships bow
Removing packing materials
10 Antenna unit Model 841, inside view, shield cover removed
12 Optional mounting bracket installation for sailboat
Display Unit Installation
13 How to mount the display unit
14 Display unit, rear view
Option connector
Procedure
Installation Check List
Initial Adjustment of Picture
Displaying the Installation Menus
Entering Initial Settings
Relative Bearing Alignment
Closing the Installation Menus
Sweep Timing
Signal cable connection
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