Furuno GD-1920C User Manual

Installation Manual MARINE RADAR MODEL1824C/1834C/ 1934C/1944C/1954C/1964C COLOR VIDEO PLOTTER GD-1920C

SAFETY INSTRUCTIONS ......................		i
EQUIPMENT LISTS...............................		ii
SYSTEM CONFIGURATIONS..............		iv
1. MOUNTING.....................................		1-1
1.1	Mounting the Display Unit...............	1-1
1.2	Mounting the Antenna Unit of
	MODEL1824C ................................	1-4
1.3	Mounting the Antenna Unit of
	MODEL1834C ..............................	1-12

1.4Mounting the Antenna Unit of MODEL1934C/1944C/1954C/1964C

......................................................1-17

3. SETTING UP THE EQUIPMENT		....3-1
3.1	Setting up with the Installation Wizard.
	........................................................	3-1
3.2	Checking Magnetron Heater Voltage
	......................................................	3-15
3.3	Remote Controller Setting ............	3-15

4. OPTIONAL EQUIPMENT ...............		4-1
4.1	ARP Kit ARP-11 ..............................	4-1
4.2	Connection of Video
	Equipment/External Monitor/Remote
	Display ............................................	4-4

1.5 Mounting the Power Supply Unit
(MODEL 1954C/1964C)................	1-26

2. WIRING ...........................................								2-1
2.1	Standard Wiring ..............................							2-1
2.2	External Buzzer (optional supply) ...							2-4
2.3	How to Connect with a PC..............							2-5
2.4	Wiring the Power Supply Unit (MODEL
	1954C/1964C) ................................							2-6

PACKING LISTS ...............................	A-1
OUTLINE DRAWINGS ......................	D-1
INTERCONNECTION DIAGRAMS ....	S-1

VX2

www.furuno.co.jp

All brand and product names are trademarks, registered trademarks or service marks of their respective holders.

The paper used in this manual is elemental chlorine free.

FURUNO Authorized Distributor/Dealer

9-52 Ashihara-cho,

Nishinomiya, 662-8580, JAPAN

Telephone : [phone]

Fax

: [phone]

All rights reserved.

Printed in Japan

A : FEB. 2005

H : JUL. 16, 2009

Pub. No. IME-35430-H

(HIMA ) MODEL1804C_GD-1920C

*00015180317*

*00015180317*

* 0 0 0 1 5 1 8 0 3 1 7 *

SAFETY INSTRUCTIONS

WARNING

		Do not open the equipment
		unless totally familiar with
		electrical circuits and
		service manual.
	ELECTRICAL	Only qualified personnel
		should work inside the
	SHOCK
	HAZARD	equipment.
		Wear a safety belt and hard
		hat when working on the
		antenna unit.

Serious injury or death can result if someone falls from the radar mast.

Construct a suitable service platform from which to install the antenna unit.

Serious injury or death can result if someone falls from the radar mast.

Turn off the power at the mains switchboard before beginning the installation.

Fire, electrical shock or serious injury can result if the power is left on or is applied while the equipment is being installed.

CAUTION

Ground the equipment to prevent electrical shock and mutual interference.

Observe the following compass safe distances to prevent deviation of a magnetic compass.

	Standard	Steering
Display unit	0.70 m	0.45 m
MODEL1824C antenna unit	1.25 m	0.85 m
MODEL1834C antenna unit	0.90 m	0.70 m
MODEL1934C antenna unit	1.00 m	0.80 m
MODEL1944C antenna unit	1.00 m	0.80 m
MODEL1954C antenna unit	1.00 m	0.75 m
MODEL 1964C antenna unit	1.65 m	1.25 m
Power supply unit PSU-005*1	1.40 m	0.95 m
Power supply unit PSU-008*2	0.80 m	0.50 m

*1 For MODEL 1954C *2 For MODEL1964C

WARNING

Radio Frequency

Radiation Hazard

The radar antenna emits electromagnetic radio frequency (RF) energy which can be harmful, particularly to your eyes. Never look directly into the antenna aperture from a close distance while the radar is in operation or expose yourself to the transmitting antenna at a close distance.

Distances at which RF radiation levels of 100 and 10 W/m2 exist are given in the table below.

Note: If the antenna unit is installed at a close distance in front of the wheel house, your administration may require halt of transmission within a certain sector of antenna revolution. This is possible - Ask your FURUNO representative or dealer to provide this feature.

			Distance to	Distance to
	MODEL		100 W/m2	10 W/m2
			point	point
	MODEL		Nil	Worst case
	1824C			0.70 m
	MODEL		Nil	Worst case
	1834C			1.50 m
	MODEL		Worst case	Worst case
	1934C		0.20 m	1.70 m
	MODEL		Nil	Worst case
	1944C			1.20 m
		XN-12A	Worst case	Worst case
	MODEL		0.10 m	2.00 m
	1954C	XN-13A	Nil	Worst case
				1.40 m
		XN-12A	Worst case	Worst case
	MODEL		0.50 m	5.40 m
	1964C	XN-13A	Worst case	Worst case
			0.40 m	3.60 m

i

EQUIPMENT LISTS

Standard supply

	Name	Type	Code No.	Qty
	Display unit	RDP-149	-	1
		RSB-0094-075	-
		RSB-0071-057	-
		XN10A-RSB-0070-064	-
		XN10A-RSB-0073-064	-
		XN12A-RSB-0070-059	-	1
	Antenna unit	XN12A-RSB-0073-059	-
		XN12A-RSB-0072-060	-
		XN12A-RSB-0073-060	-
		XN13A-RSB-0072-060	-
		XN12A-RSB-0072-061	-	1
		XN12A-RSB-0073-061	-
		XN13A-RSB-0072-061	-
	Power supply unit	PSU-005	-	1
	Power supply unit	PSU-008	-	1
	Remote controller	RMC-100	000-089-885	1
	set
		CP03-25401	008-443-160	1set
		CP03-16901	008-478-750	1set
		CP03-18401	008-503-360	1set
		CP03-22700	000-080-049	1set
		CP03-21800	000-080-014
		CP03-21810	000-080-015	1
		CP03-21820	000-080-016
	Installation
		CP03-21830	000-080-017
	materials
		CP03-22000	000-080-021
		CP03-22010	000-080-022	1
		CP03-22020	000-080-023
		CP03-22030	000-080-024
		CP03-30500	000-083-620
		CP03-30510	000-083-621	1
		CP03-30520	000-083-622
		CP03-30530	000-083-623

Remarks

MODEL 1824C

MODEL 1834C MODEL1934C, 24 rpm MODEL1934C, 48 rpm MODEL1944C, 24 rpm MODEL1944C, 48 rpm MODEL1954C, 4 ft, 24 rpm MODEL1954C, 4 ft, 48 rpm MODEL1954C, 6 ft, 24 rpm MODEL1964C, 4 ft, 24 rpm MODEL1964C, 4 ft, 48 rpm MODEL1964C, 6 ft, 24 rpm For MODEL1954C

For MODEL1964C

Remote controller, vinyl case, battery, labels

For ant. unit of Model 1824C For ant. unit of Model 1834C

For ant. unit of Model 1933C/1944C/1954C/1964C

For display unit, MJ-A3SPF0018-050Z cable, CP03-22701

For MODEL1824C/1834C

10 m cable MJ-B24LPF-0002-100

For MODEL1824C/1834C 15m cable MJ-B24LPF-0002-150

For MODEL1824C/1834C 20m cable MJ-B24LPF-0002-200

For MODEL1834C/1834C 30m cable MJ-B24LPF-0002-300

For 1934C/1944C/1954C 10m cable MJ-B24LPF-0005-100

For 1934C/1944C/1954C 15m cable MJ-B24LPF-0005-150

For 1934C/1944C/1954C 20m cable MJ-B24LPF-0005-200

For 1934C/1944C/1954C 30m cable MJ-B24LPF-0005-300

For 1964C, 10m RW-9771 cable For 1964C, 15m RW-9771 cable For 1964C, 20m RW-9771 cable For 1964C, 30m RW-9771 cable

ii

(Con’t from next page)

Name	Type	Code No.	Qty
Installation
materials	CP03-24500	000-080-191	1
	CP03-30600	000-084-769	1
	SP03-14501	000-844-420	1set
Spare parts	SP03-14001	000-080-018	1set
	SP03-14001	000-080-018	1set

Remarks

For power supply unit of 1954C cable VL3P-VV-S2X2C-AA050 cable MJ-B24LPF0009-050 Inst. Mat. CP03-24501

For power supply unit of 1964C cable VL3P-VV-S2X2C-AA050 cable MJ-B24LPF0011-050 Inst. Mat. CP03-30601

Fuses for power supply unit PSU-008 (Model 1964C) Fuses for power supply unit PSU-005 (Model 1954C) Fuses for display unit

Optional supply

	Name	Type	Code No.	Qty	Remarks
			000-013-484		For GD-1920C, 100 VAC
		PR-62	000-013-485	1	For GD-1920C, 110 VAC
	Rectifier		000-013-486		For GD-1920C, 220 VAC
			000-013-487		For GD-1920C, 230 VAC
					For MODEL series
		RU-3423	000-030-443	1
		RU-1746B-2	000-030-439	1	For Model 1964C
	External	OP03-136	000-086-443	1
	buzzer				For NavNet, 1 m
		MJ-A6SPF0014-010C	000-154-027-10	1
		MJ-A6SPF0014-050C	000-154-049-10	1	For NavNet, 5 m
		MJ-A6SPF0014-100C	000-154-050-10	1	For NavNet, 10 m
		MJ-A6SPF0014-200C	000-154-051-10	1	For NavNet, 20 m
		MJ-A6SPF0014-300C	000-154-052-10	1	For NavNet, 30 m
		MJ-A6SPF0012-050C	000-154-053-10	1	For navaid, 5 m, 6P-6P cross
		MJ-A6SPF0012-100C	000-154-037-10	1	For navaid, 10 m, 6P-6P cross
		MJ-A6SPF0003-050C	000-154-054-10	1	w/6P connector, 5 m
	Cable assy.	MJ-A6SPF0009-100C	000-154-036-10	1	w/6P connector, 10 m
		MJ-A6SPF0007-100	000-125-237	1	For compass, 10 m
					For external buzzer, PC,
		MJ-A7SPF0007-050	000-144-418	1
					w/7P connector, 5 m
					Adapter cable for HUB
		MJ-A6SRMD/TM11AP8-	000-144-463	1
		005
		MJ-B24LPF0008-100	000-145-125	1	For remote display,		With
					10 m		CP03-
							24801
		MJ-B24LPF0008-200	000-145-126	1	For remote display,
					20 m		(EMI core)
		MJ-B24LPF0008-300	000-145-127	1	For remote display,
					30 m
	Remote	RMC-100	000-089-885	1	Remote controller, vinyl case,
	controller set				battery, labels
	RGB output	OP03-176	008-526-360	1	For external monitor
	cable kit
					ARP Board, for radar
	ARP kit	ARP-11	008-523-050	1
	PIP kit	OP03-175	008-523-070	1	Connection video source
	Chart card	-	-	-	Specify when ordering.
	Mounting	OP03-92	008-445-070	1	For MODEL1834C
	bracket (1)
	Mounting	OP03-93	008-445-080	1	For MODEL1824C
	bracket (2)
					Connection of AIS FA-100
	AIS Interface	IF-1500AIS

iii

SYSTEM CONFIGURATIONS

All NavNet products incorporate a “network circuit board” to integrate each NavNet product on board through an optional LAN cable (Ethernet 10BASE-T). Each NavNet product is assigned an IP address to enable transfer of images between other NavNet products. For example, video plotter pictures can be transferred to a radar and vice versa. Pictures received via the NavNet may be adjusted at the receiving end.

The number of display units which may be installed depends on the number of network sounders connected. For a system incorporating three or more NavNet products, a “hub” is required to process data.

For one network sounder: one radar and three plotters, or four plotters For two network sounders: one radar and two plotters, or four plotters

			Antenna Unit		MODEL1824C	GPS receiver
						GP-320B/330B
	MODEL	MODEL	MODEL	MODEL		or
					MODEL	Weather station
	1964C	1954C	1934C	1944C
						WS-200
					1834C

Power Supply Unit
PSU-005	Display unit
(MODEL 1954C)
Power Supply Unit	RDP-149
PSU-008
(MODEL 1964C)

	AIS transponder	AIS Interface	ARPA
		IF-1500AIS*
			ARP-11
		* Not required for AIS
			(Built-in)
		Transponder FA-150

	Rectifier			Facsimile
	RU-3423
				Receiver
				FAX-30
	100/110/115/220/230 VAC 12 - 24 VDC*
	1φ, 50/60 Hz*
: Standard	*: The power for the power supply unit
: Option	and display unit must be drawn from
: Local supply	the same power source.

HUB

Network

Sounder

ETR-6/10N

ETR-30N

Echo sounder

Navigator

External buzzer PC

VGA monitor Remote display Video equipment

Heading sensor

FA-30

AIS RECEIVER

Other NavNet unit (GD-1920C, etc.)

NavNet system: MODEL1824C/1834C/1934C/1944C/1954C/1964C

iv

*Not required for AIS Transponder FA-150

GPS receiver

GP-320B/330B

or

Weather station

WS-200

External buzzer

	AIS transponder		AIS Interface	VGA monitor
			IF-1500AIS*
				Remote display
		Remote		PC
		Controller		Video equipment
		RMC-100		ARPA
		Display unit		ARP-11
		RDP-149		HUB	FA-30
					AIS RECEIVER
				Echo sounder
	Other NavNet Unit			Navigator
	(Model 1834C, etc.)
	Facsimile		Network		Rectifier
			Sounder		PR-62
	Receiver
			ETR-6/10N	12 - 24 VDC
	FAX-30
			ETR-30N
	: Standard			100/110/115/220/230 VAC
				1φ, 50/60 Hz
	: Option
	: Local supply

NavNet system: GD-1920C

v

Radar Antenna Unit,	Radar Antenna Unit,
GPS Receiver GP-320B/330B	GPS Receiver GP-320B/330B
OR	OR
Weather Station WS-200	Weather Station WS-200

RADAR	RADAR
or	or
PLOTTER	PLOTTER

Radar, plotter data

		Radar, plotter data
Two-unit NavNet system
Radar Antenna Unit,		Radar Antenna Unit,
GPS Receiver GP-320B/330B		GPS Receiver GP-320B/330B
OR		OR
Weather Station WS-200		Weather Station WS-200

RADAR	RADAR
or	or
PLOTTER	PLOTTER

Radar data

Plotter data

HUB

Sounder data

Facsimile

data

Sounder data

Note: The picture disappears 10 seconds after the NavNet cable is disconnected from a "sub" NavNet display unit.

Network Sounder		Facsimile
				Network Sounder
ETR-6/10N		Receiver		ETR-6/10N
ETR-30N		FAX-30		ETR-30N
(option)		(option)		(option)

Three-or-more unit NavNet system

vi

1. MOUNTING

NOTICE

Do not apply paint, anti-corrosive sealant or contact spray to coating or plastic parts of the equipment.

Those items contain organic solvents that can damage coating and plastic parts, especially plastic connectors.

1.1 Mounting the Display Unit

The display unit can be mounted on a tabletop, on the overhead or flush mounted in a console or panel.

Table Top

Overhead

Hard Cover

Tabletop, overhead mounting method

1.1.1 Mounting considerations

When selecting a mounting location for the display unit, keep the following in mind:

•Keep the display unit out of direct sunlight.

•The temperature and humidity at the mounting location should be moderate and stable.

•Locate the unit away from exhaust pipes and vents.

•The mounting location should be well ventilated.

•Mount the unit where shock and vibration are minimal.

•Keep the unit away from electromagnetic field generating equipment such as motors and generators.

•For maintenance and checking purposes, leave sufficient space at the sides and rear of the unit and leave slack in cables. Minimum recommended space is shown in the outline drawing for the display unit.

•A magnetic compass will be affected if the display unit is placed too close to it. Observe the compass safe distances shown in the SAFETY INSTRUCTIONS to prevent disturbance to the magnetic compass.

1-1

1.1.2 Mounting procedure

Tabletop, overhead mounting

Follow the procedure below to mount the display unit on a tabletop or the overhead.

1.Fix the hanger by using four tapping screws (5x20).

2.Screw knob bolts in display unit, set it to the hanger, and tighten the knob bolts.

3.Attach the hard cover to protect the LCD.

Display unit

Tapping screws (4 pcs.)

Knob bolts (2 pcs.)

Hanger

Tabletop, overhead mounting of display unit

Note: For the overhead mounting, reinforce the mounting location and secure the hanger, with bolts, nuts and washers (local supply).

1-2

Flush mounting

Note: Use supplied pan head screws when the thickness of the bulkhead is from 11 to 14 mm. For bulkhead which exceeds 14 mm in thickness, the length of the pan head screws should be bulkhead thickness (A) plus 7.8±1.2 mm. Also the length of B should be max. 8 mm.

B A

Fixing screw, side view

1.Prepare a cutout in the mounting location whose dimensions are as shown below.

2.Attach the flush mount sponge to the display unit.

3.Fix the display unit by using six washer head screws M4x20. Refer to the outline drawing at the back of this manual.

6-R2.25

342+0.5

217+0.5

140+0.5

4.5

209+1

335+1

Flush mounting of display unit

Note: When installing the display unit in a panel, attach the vinyl tube (ø6, local supply) to the drain hole to allow moisture to escape. Then, fasten the tube to the drain hole with a cable tie.

1-3

1.2 Mounting the Antenna Unit of MODEL1824C

1.2.1 Mounting considerations

When selecting a mounting location for the antenna unit, keep in mind the following points.

•Install the antenna unit on the hardtop, radar arch or on a mast on an appropriate platform. (For sailboats, a mounting bracket is optionally available.) It should be placed where there is a good all-round view with, as far as possible, no part of the ship’s superstructure or rigging intercepting the scanning beam. Any obstruction will cause shadow and blind sectors. A mast, for instance, with a diameter considerably less than the width of the antenna unit, will cause only a small blind sector. However, a horizontal spreader or crosstrees in the same horizontal plane would be a much more serious obstruction; place the antenna unit well above or below it.

Antenna unit

Antenna unit

Antenna unit

Antenna unit

Typical antenna unit placement on sailboat and powerboat

•In order to minimize the chance of picking up electrical interference, avoid where possible routing the antenna cable near other electrical equipment onboard. Also avoid running the cable in parallel with power cables.

•Observe the compass safe distances mentioned in the SAFETY INSTRUCTIONS to prevent interference to a magnetic compass.

1-4

1.2.2 Mounting procedure

1.Remove the mounting hardware from the bottom of the antenna unit: four each of hex bolts (M10X20), spring washers and flat washers. Save the mounting hardware to use it to fix the antenna unit to the mounting platform later on.

Stern	Bow

Screws

two screws on other side

Flat washer

Spring washer

Hex bolt (M10 x 20)

Antenna unit, showing location of mounting hardware

2.Construct a platform (wood, steel*, or aluminum) of 5-10 mm (recommended dimension) in thickness referring to the outline drawing at back of this manual. Fasten the platform to the mounting location. Next, position the mounting base on the platform so the cable entrance faces the stern direction.

*: For steel platform take appropriate measures to prevent corrosion.

Note: When drilling holes in the platform, be sure they are parallel with the fore and aft line.

3.Using the hex bolts, flat washers and spring washers removed at step 1, fasten the mounting base to the platform. The torque should be between 19.6-24.5 N•m.

Note: Longer hex bolts (M10X25) are supplied with the installation materials. Use them instead of the hex bolts removed earlier if the mounting platform thickness is 5–10 mm.

	Transceiver
	module
Efeective	Antenna base
	assy.
thread
length:
12 mm
	5 mm or under : M10x20
	5-10mm:	M10x25
	over 10 mm:	locally supplied bolts
Flat	Platform
washer

Spring

washer Hex bolt Apply silicone sealant. (M10 x 25

or M10 x 20)

How to fasten the mounting base to platform

1-5

4.The mounting base is fitted with a snap holder, which may be used to hang the cover after removal. Use the hole next to a screw hole inside the cover to hang it.

a)Unfasten the snap assy. with the string attached at the holder in the mounting base.

b)Unwind the string.

c)Attach the snap to a screw hole on the inside of the cover.

Note: Do not hang any other objects with the snap.

Snap holder

Remove and discard the packing material.

Antenna unit, inside view

1-6

5.Unfasten the rotation detector cable from the cable clamps, referring to the figure on page 1-10.

6.Unfasten 16 screws (c1 , c2 and c3 in the figure below) to dismount the shield plate, core case and core case cover.

		Pan head screws
		M3x10 2 pcs. 2			Core case cover
					3
					3
		3
		2
		Core case	2	3	Pan head screws
					M4x10 5 pcs. 3
	Cable clamps
		1
		1		3	Rotation detector cable
		1	1
Shield plate
	1	1

		1
Pan head screws	1	3
		1

M4x8 9 pcs. 1

3

GNDVt
V-
OP	GND
		+V
	OP		IF
			GND

3

3

Caution: Be careful not to pinch the rotation detector cable when remounting the shield plate.

1-7

7.Pass the antenna cable with connector through the cable gland, gasket and cable entrance of the antenna unit, and then tighten cable gland.

Note 1: Be sure the shrink tube on the antenna cable does not contact the gasket. Note 2: Pinch the gasket tightly and insert it into the cable entrance. Confirm that the slit

in the gasket is completely closed after inserting it into the cable entrance.

Rubber gasket

Gasket

Cable Gland

Sectional view

Shrink tube Close the gasket tightly.

Rubber gasket

Do not allow

Mounting base

shrink tube to contact gasket.

Gasket

Antenna cable

Antenna unit, inside view

8.Twist antenna connector cables at the position between the shrink tube and the cable tie, and then attach EMI core (supplied) to cables as shown below. After attachment, shift EMI core slightly to confirm that it does not pinch cables.

Attach EMI core.

Twist cables here. Shrink tube

Cable tie

Gasket

Radome base

Location of EMI core

1-8

9.Attach connectors of the antenna cable to the locations shown in the figure below, and then fasten a pan head screw M4x10 to fix shield cable and core case (removed at step 6.)

Pan head screws

M4x10 9 pcs.

J810

(13 pin) J809 (4 pin)

J801 (9 pin)

Antenna unit, connector location and fixing the shield cable w/core case

10.Put the EMI core on the antenna cable into the core case attached at step 9, with the flat side of the core facing downward.

EMI core

Core case

EMI core, putting into core case

11.Refasten the shield plate and core case cover with 15 screws. Be sure that the cable from the rotation detector passes through the notch between the two cable ties.

Notch

How to pass the rotation detector cable

1-9

12. Pass the cable from the rotation detector through two cable clamps.

Rotation detector

Cable clamps

Cable tie (Another should be inside.)

Antenna unit, clamping the rotation detector cable

13.Follow the instructions on the label inside the mounting base to secure the snap assy.

14.Confirm that the rubber gasket is properly positioned and that the triangle mark on the radome cover is aligned with the triangle mark on the mounting base, then tighten the fixing screws for the cover. See the sectional view on page 1-8 for how to position the rubber gasket.

Mounting the optional mounting bracket

A mounting bracket for fastening the antenna unit to a mast on a sailboat is optionally available.

Contents of mounting bracket 2 kit Type: OP03-93, Code No.: 008-445-080

Part	Type	Code No.	Qty
Hex. bolt	M4x12	000-804-725	4
Hex. bolt	M8x20	000-805-707	8
Mounting plate	03-018-9001-0	100-206-740	1
Support plate (1)	03-018-9005-0	100-206-780	1
Support plate (2)	03-018-9006-0	100-206-790	1
Bracket (1)	03-028-9101-0	100-206-810	1
Bracket (2)	03-028-9102-0	100-206-820	1
Fixing plate	03-028-9103-0	100-206-830	2

Assemble the mounting bracket and fasten it to a mast. Fasten the antenna unit to the bracket. For details, see the figure on the next page.

1-10

M8 x 20

plate

M8 x 20	(1)

plate (2)

Bracket

Support plate (1)

M8 x 20

M4 x 12

(A) Assembling the mounting bracket

M10 x 25 (supplied with antenna unit)

(B)Fastening antenna to mounting bracket

How to assemble and mount the optional mounting bracket

1-11

1.3 Mounting the Antenna Unit of MODEL1834C

1.3.1 Mounting considerations

• See the mounting considerations for the MODEL1824C on page 1-4.

• Observe the compass safe distances mentioned in the SAFETY INSTRUCTIONS to prevent deviation of the magnetic compass.

1.3.2 Mounting procedure

1.Open the antenna unit packing box carefully.

2.Unbolt the four bolts at the base of the radome cover to remove the cover.

Radome cover

Antenna unit

The mounting surface must be parallel with the waterline and provided with five holes (four fixing holes and one cable entry) whose dimensions are shown in the outline drawing at the back of this manual.

The unit is adjusted so a target echo returned from the bow direction will be shown on the zero degree (heading line) position on the screen. When drilling holes, be sure they are parallel with the fore and aft line.

3.Prepare a platform (wood, steel*, or aluminum) of 5 to 10 millimeters in thickness for the antenna unit.

A mounting bracket for mounting the antenna unit on a sailboat mast is optionally available. (Refer to page 1-16.) Find the cable entry on the radome base. Next, position the radome base so the cable entry faces the stern direction. This alignment must be as accurate as possible.

*: For steel platform, take appropriate measures to prevent corrosion.

Cable entry

Flat washer Spring washer M10 x 25 Hex bolt

Ship's bow

4-10 Holes

Platform

Antenna unit, cover removed

1-12

	Antenna base plate
Effective	Gasket
thread length	Radome
25 mm
	5 - 10 mm
Flat
washer
Spring	Platform
washer	M10 x 25
Apply silicone sealant.	Hex bolt

How to fasten the radome base to the mounting platform

Wiring and final preparations

4.Drill a hole of approx. 16 mm diameter through the deck or bulkhead to run the signal cable between the antenna unit and the display unit. (To prevent electrical interference avoid running the signal cable near other electrical equipment and in parallel with power cables.) Pass the cable through the hole. Then, seal the hole with sealing compound for waterproofing.

5.Remove three shield covers in the radome.

6.Remove the cable clamping plate by unfastening four screws and removing a gasket.

	Shield cover	Screws
	Screws	4 pcs.
		Cable clamping plate
	7 pcs.
	Shield cover	Gasket

Screws

7 pcs.

Screws 6 pcs.

Shield cover

Antenna unit, inside view

7.Pass the cable through the hole at the bottom of the radome base.

8.Secure the cable with the cable clamping plate and gasket. Ground the shield wire by one of the screws of the cable clamping plate.

1-13

9. Attach three connectors of the signal cable to respective receptacles as shown below.

to one of the screws

of the cable clamping plate

9-pin connector:

to J801 on MD-9208

4-pin connector:

to J802 on MD-9208

13-pin connector:

to J611 on IF-9214A

Signal cable, antenna unit side

J801	J802
	MD-9208

Cable entry

PTU-9335

J611

IF-9214A

RF unit

1-14

10.Bundle the cables with the EMI core (supplied) as shown below.

J801	J802	J805	MD-9208
	J804		J806
		J803
Cable
entrance
Cable		Motor
clamping plate

EMI core E04SS251512 (Above cable

clamping J1 plate)

J613

PTU-9335

J611 IF9214A

EMI core

11.Fix the shield cover. Do not pinch the cable.

12.Attach the radome cover, aligning triangle mark on radome cover with that on radome base.

Radome cover

Radome base

How to position the radome cover

13.Loosely fasten the radome fixing bolts. You will tighten them after confirming magnetron heater voltage.

1-15

Mounting the optional mounting bracket

A mounting bracket for fastening the antenna unit for the MODEL1834C to a mast on a sailboat is optionally available.

Contents of mounting bracket 1 (Type: OP03-92, Code No.: 008-445-070)

Part	Type	Code No.	Qty
Hex. bolt	M4X12	000-804-725	4
Hex. bolt	M8X20	000-805-707	8
Mounting plate	03-018-9001-0	100-206-740	1
Support plate (1)	03-018-9005-0	100-206-780	1
Support plate (2)	03-018-9006-0	100-206-790	1
Bracket (1)	03-018-9002-1	100-206-751	1
Bracket (2)	03-018-9003-1	100-206-761	1
Fixing plate	03-018-9004-1	100-206-771	2

Assemble the mounting bracket and fasten it to a mast. Fasten the antenna unit to the bracket. For details, see the figure on page 1-11.

1-16

1.4Mounting the Antenna Unit of MODEL1934C/1944C/1954C/1964C

1.4.1 Mounting considerations

•The antenna unit is generally installed either on top of the wheelhouse or on the radar mast on a suitable platform. Locate the antenna unit where there is a good all-round view. Any obstruction will cause shadow and blind sectors. A mast for instance, with a diameter considerably less than the horizontal beamwidth of the radiator, will cause only a small blind sector, but a horizontal spreader or crosstrees in the same horizontal plane as the antenna unit would be a much more serious obstruction; you would need to place the antenna unit well above or below it.

•It is rarely possible to place the antenna unit where a completely clear view in all directions is available. Thus, you should determine the angular width and relative bearing of any shadow sectors for their influence on the radar at the first opportunity after fitting.

•To lessen the chance of picking up electrical interference, avoid where possible routing the signal cable near other onboard electrical equipment. Also avoid running the cable in parallel with power cables.

•A magnetic compass will be affected if the antenna unit is placed too close to it. Observe the compass safe distances mentioned in the SAFETY INSTRUCTIONS to prevent interference to a magnetic compass.

•Do not paint the radiator aperture, to ensure proper emission of the radar waves.

•When this radar is to be installed on larger vessels, consider the following points:

•The signal cable run between the antenna and the display units comes in lengths of 10 m, 15 m, 20 m and 30 m.

•Deposits and fumes from a funnel or other exhaust vent can adversely affect the aerial performance and hot gases may distort the radiator portion. The antenna unit must not be mounted where the temperature is more than 70°C.

As shown in the figure below, the antenna unit may be installed on the bridge, on a common mast or on the radar mast.

(a) On bridge

(b) Common mast

(c) Radar mast

1-17

1.4.2 Mounting procedure

Referring to the outline drawing at the back of this manual, drill five holes in the mounting platform: four holes of 15 mm diameter for fixing the antenna unit and one hole of 25-30 mm diameter for the signal cable.

Fastening the radiator to the radiator bracket

For your reference, the antenna installation materials list appears in the packing list for this unit at the back of this manual.

1.Remove the radiator cap from the radiator bracket.

2.Coat contacting surface between the antenna radiator and the radiator bracket with silicone sealant as shown in the figure below.

ANTENNA RADIATOR		RADIATOR BRACKET
		(top view)
(bottom view)
	Groove
		10mm
	Radiator
		Coat hatched area with
Coat grey area with		silicone sealant.
silicone sealant.
(MODEL 1934C)		(MODEL 1944C/1954C/1964C)

Coating the antenna with silicone sealant

3.Coat threaded holes on the antenna radiator with silicone sealant.

4.Grease the O-ring and set it to the radiator bracket.

5.Lay the antenna radiator on the radiator bracket.

6.Coat the radiator fixing bolts (4 pcs.) with silicone sealant. Fasten the antenna radiator to the radiator bracket with the radiator fixing bolts, flat washers and spring washers.

Antenna radiator

Coat threaded holes with silicone

sealant.

O-ring Radiator bracket

Flat washer

Spring washer

Hex head bolt

(M8 x 30)	Coat bolts with

silicone sealant.

Fastening the radiator bracket to the antenna unit chassis

1-18

Mounting the antenna unit

The antenna unit can be mounted using the fixing holes on the outside (200 x 200 mm) or inside (140 x 150 mm) the antenna unit.

Using outside fixing holes of the antenna housing

Use the hex head bolts (supplied) to mount the antenna unit as below.

1. Lay the corrosion-proof rubber mat (supplied) on the mounting platform.

Ground terminal

Rubber mat

Bow mark

Location of rubber mat

2. Lay the antenna unit on the mounting platform, orienting it as shown in below.

BOW

STERN

Antenna unit

CAUTION

Do not lift the Antenna unit by the radiator; lift it by the housing.

The radiator may be damaged.

1-19

3.Insert four hex bolts (M12x60, supplied) and seal washers (Ф30, supplied) from the top of the antenna housing, as shown below.

Hex bolt

Seal washer

Flat washer

Spring washer

Nut

Fixing the antenna unit chassis

4.Pass flat washers (M12, supplied), spring washers (M12, supplied) and nuts (M12, supplied) onto hex bolts. Fasten by tightening nuts. Do not fasten by tightening the hex bolts; seal washers may be damaged.

	Seal washer
		Antenna
	Rubber mat	unit
		Mounting
		platform
	Flat washer	Silicone
		sealant

How to fasten antenna unit to mounting platform

5.Coat flat washers, spring washers, nuts and exposed parts of bolts with anticorrosive sealant.

6.Prepare ground point in mounting platform (within 300 mm of ground terminal on antenna unit) using M6 x 25 bolt, nut and flat washer (supplied).

7.Run the ground wire (RW-4747, 340 mm, supplied) between the ground terminal and ground point.

1-20