Furuno FR1500 Mk3 User Manual download pdf (Page 32)

-1.20-

(a) Echo average OFF (b) Echo average ON

Echo averaging uses scan-to-scan signal correlation technique based on the true motion over the

ground of each target. Thus, small stationary targets such as buoys will be shown while

suppressing random echoes such as sea clutter. True echo average is not however effective for

picking up small targets running at high speeds over the ground.

Echo average is inoperable when a compass signal is not available. If you wish to use this feature

without a compass signal, consult a FURUNO representative.

Do not use the Echo Average function under heavy pitching and rolling; loss of

target detection can result.

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SHIPBORNE RADAR AND ARPA 1
*00080840400**00080840400* 2
*OME34500T00**OME34500T00* 2
SAFETY INSTRUCTIONS 3
TABLE OF CONTENTS 5
INTRODUCTION 7
•1 menu are not accessible 9
ANTENNA RADIATORS 10
RF TRANSCEIVER 10
DISPLAY UNIT 10
INTERFACE 10
POWER SUPPLY 10
1 OPERATIONAL OVERVIEW 13
Video Freeze-up Recovery 13
1.3 Control Description 14
1.4 CRT Brilliance 15
1.6 Tuning the Receiver 15
1.7 Degaussing the Screen 16
1.9.2 Manual speed input 17
PULSE 1 M1 18
H U RM 18
1.11 Presentation Modes 19
1.15 Suppressing Sea Clutter 23
1.17 Interference Rejector 24
1.18 Measuring the Range 25
1.19 Measuring Bearing 26
1.22.1 Introduction 29
1.23 Off-centering (shift) 30
1.24 Echo Averaging 31
1.25.1 Plotting a target 33
1.25.2 Cancelling 34
1.25.3 Vectors 34
CPA/TCPA 35
1.25.8 Past plot points 36
1.26.2 Trail gradation 37
1.26.4 Thin trails 37
1.26.5 Restoring trails 38
1.27 Parallel Index Lines 39
1.30 Markers 41
1.32 [F1] Key 42
1.33 [F2] Key 43
1.34 FUNCTION Key 44
-1.34 46
1.36.1 Echo stretch 47
1.36.2 Contrast 47
1.37 Watch Timer 48
1.38 Noise Rejector 49
1.39 Navigation Data 49
1.42 Degaussing Interval 50
1.43 Background Color 50
1.44 Clutter Sweep 50
1.45 Day, Night Brilliance 51
1.46 Contrast 51
1.47.1 Preparation 52
1.48 Alarms 56
1.51 Echo Area (R-type only) 59
2.1 Introduction 60
2.2 Criteria of Tracking 61
Own ship maneuvers 62
Other ship maneuvers 62
2.5 Acquiring Targets 65
- TARGET SWAP 66
2.5.2 Automatic acquisition 66
2.6.1 Individual targets 67
2.6.2 All targets 67
2.7.1 Vector time 68
2.7.2 Vector start time 68
2.9 Past Position Display 69
2.10 Set and Drift 69
2.11 Alarms 70
2.11.3 Guard zone alarm 71
2.13 Outputting Target Data 72
2.14 Diagnostic Sequence 73
Sea returns 74
Indirect echoes 75
3 RADAR OBSERVATION 76
Bearing accuracy 77
Range measurement 77
3.2 False Echoes 78
Screen A: When SART 79
is distant 79
Screen B: When SART 79
is close 79
3.4 RACON (Radar Beacon) 81
5 MAINTENANCE 83
5.3 Replacement of Batteries 84
6 TROUBLESHOOTING 85
Serviceman qualification 86
Service call 86
(Continued on next page) 87
6.3 Diagnostic Test 90
6.4 Menu Hierarchy 92
[MENU] key + 93
7 OPTIONAL EQUIPMENT 95
9 nm 9 nm 96
Description of Sentences 99
* Not used 102
*: Not used 103
T = tracking 106
Figure A-5 Scanner unit 110
Figure A-6 RF module 111
MD Board 112
9.2 Circuit diagrams 113
CHANNEL 2 OUTPUT 114
9.3 Parts list 116
2 FR-1505/1515/1525 MARK-3 117

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Furuno FR1500 Mk3 User Manual Page 32

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