(
C
9-52, Ashihara-cho,
Nishinomiya, Japan
Telephone: 0798-65-2111
Telefax: 0798-65-4200
All rights reserved.
Printed in Japan
Your Local Agent/Dealer
FIRST EDITION : APR. 1998
E : JUL. 4, 2001
PUB. No. IME-56140-E
TENI)
FS-1503
SAFETY INSTRUCTIONS
CAUTION
Observe the following compass safe
distances:
Ground the equipment to
prevent electrical shock and
mutual interference.
Equipment Standard Steering
compass compass
Transceiver 1.1 m 0.8 m
Ant. Coupler 0.6 m 0.5 m
MIC, Handset 0.6 m 0.4 m
DANGER
Never touch the SSB antenna, antenna
coupler or lead-in insulator when the
SSB radiotelephone is transmitting.
High voltage which will cause death or
serious injury is present at the locations
mentioned above when the SSB radiotelephone is transmitting.
Antenna
Indoor
Antenna Wire
(High Voltage)
Antenna
Coupler
Wire
Lead-in
Insulator
(High
Voltage)
WARNING
Do not open the cover
unless totally familiar with
electrical circuits and
service manual.
High voltage exists inside the
equipment, and a residual
charge remains in capacitors
several minutes after the
power is turned off. Improper
handling can result in electrical shock.
Turn off the power at the switchboard
before beginning the installation.
Fire or electrical shock can result if the
power is left on.
iiiiiiiiiiiii
i
TABLE OF CONTENTS
EQUIPMENT LISTS......................................................................................................iii
SYSTEM CONFIGURATION .....................................................................................v
1. MOUNTING
1.1 Mounting of Transceiver Unit....................................................................................1-1
1.2 Mounting of Antenna Coupler....................................................................................1-3
1.3 Ground System ...........................................................................................................1-6
1.4 Mounting of Antenna .................................................................................................1-7
2. WIRING ........................................................................................................................2-1
3. WIRING OF OPTIONAL EQUIPMENT
3.1 NBDP Terminal DP-6.................................................................................................3-1
3.2 DSC Terminal DSC-60...............................................................................................3-1
3.3 Remote Station RB-500 .............................................................................................3-2
3.4 Distributor DB-120/DB-500 ......................................................................................3-2
3.5 REMOTE and CONTROL Boards.............................................................................3-3
3.6 BK (Break-in) Connection .........................................................................................3-4
3.7 Telex Filter .................................................................................................................3-4
3.8 SW Regulator (SW REG board) ................................................................................3-5
3.9 Dummy Load .............................................................................................................3-6
3.10 Floating Ground Radiotelephone (FS-5000, etc.) ....................................................3-7
4. INSTALLATION CHECK
4.1 lnstallation Checks .....................................................................................................4-1
4.2 User Channel Registration .........................................................................................4-2
PACKING LISTS..........................................................................................................A-1
OUTLINE DRA WINGS..............................................................................................D-1
SCHEMATIC DIAGRAMS....................................................................................... S-1
ii
Standard Set
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tinUreviecsnarT3051-SF—1 elbacrewophtiW
relpuoCannetnA3051-TA—1
EQUIPMENT LISTS
A3051-SF— A.S.UroF
seirosseccA
straPerapS
noitallatsnI
slairetaM
Note: See packing lists on pages A-1 to A-4 for details.
0-50PF50000-000809-05
01050-50PF909-050-0001CIMoN
0-50PS0044
0670-50PC0
01670-50PC709-050-0001 relpuocannetnaoN
058-939-5001 tinureviecsnartroF
609-050-0001 relpuocannetnahtiW
1CIMhtiW
iii
Optional Equipment
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rewoPCD-CA072-RP—1
retrevnoCCD-CD022-CP—1
tiKA-ETOMER28-50PO018-939-5001roFC232-SR
tiKB-ETOMER38-50PO
tiKLORTNOC14-50PO033-029-5001 noitcennocKB
ssapdnaBretliF40L0FS396-611-0001 lanimreTCSD/PDBNroF
KGERWSit
daoLymmuD.yssA
annetnApihWD6-WAF821-275-0001
annetnApihW2R6WAF801-275-0001
annetnApihW2PR6-WAF901-275-0001
annetnApihWA2R6-WAF129-701-000
annetnApihWA2PR6-WAF029-701-0001
annetnAtelbuoD22E236-050-0001
eriWelgniS
annetnA
naps-elbuoD
annetnA
48-50PO038-939-5001
58-50PO048-939-5001
42E436-050-0001
52E536-050-0001
0028-939-50
1croFpooltnerru
annetnApihW
tiKni-daeL
annetnApihW
redeeF
tesdnaH5ZF0006-SH326-211-0001
gnillecnac-esioN
CIM
rotubirtsiD021-BD—1
rotubirtsiD
noitatSetomeRR005-B—1
etalPhtraE10804S40781-275-000103 x 0021 x mm3.0
elbaClaixaoC9490S50-584-031-000
elbaClortnoC2640S50-163-311-000
lanretxE
rekaepsduoL
62E636-050-0001
72E736-050-0001
D211M
0199054
SR-005-BD()E
Q12-MES719-441-0001
784-611-0001
—1
1m05,04,03,02
)8,7,6(
1m05,04,03,02
)4,3,2(
iv
SYSTEM CONFIGURATION
FS-1503 SYSTEM CONFIGURATION
Antenna Coupler
AT-1503
Transceiver Unit
FS-1503
MIC
(Handset
optionally
available)
PC-220 PR-270
24 VDC
*
AGC STATION
MODE
CURS
CLARI
TX
1
2
3
SQL
SCAN
RX
5
6
4
H/L
TUNE
CH
8
7
9
H3E
START
INT
2182
ALM ENT
0
TEST
External
MIC
VOLUME RF GAIN FREQ/CH
OFF
SSB TRANSCEIVER FS-1503
SIMP
R
0246810
S
AGC NB
Speaker
13.6 V
13.6 V
100/110/200/220 VAC
13.6 VDC
FS-1503 system configuration
DSC Terminal
Distributor
DB-500
OR
DSC-5/6
NBDP Terminal
DP-5/6
Remote Station
RB-500
Distributor
DB-120
DSC Terminal
DSC-60
NBDP Terminal
DP-6
Option
* Optional pcb (REMOTE A or
REMOTE B) required.
v
1. MOUNTING
1.1 Mounting of Transceiver Unit
General mounting considerations
The transceiver unit can be mounted on the overhead, a bulkhead, on a tabletop, or in a console
(flush mounting).
When selecting a mounting location keep the following points in mind:
• Make sure the location is strong enough to support the unit under the conditions of continued
vibration and shock normally encountered on the boat. Where necessary , reinforce the mounting location by lining block or doubling plate.
• Locate the unit where it is easily accessible and does not interfere with personnel or operation of other equipment; for example, ship’s wheel.
• Leave enough space around the sides and rear of the unit so a service technician can access
the connectors for maintenance.
• Observe the compass safe distance listed in the Safety Instructions to prevent deviation of a
magnetic compass.
• If the equipment is to be installed without the hanger, leave sufficient space underneath the
the equipment to allow for circulation of cooling air.
Mounting on overhead, bulkhead or tabletop
1. Using the hanger as a template, mark hole locations.
2. Fix the hanger with four sets of self-tapping screws and washers (supplied). (If extra support
is required, drill six pilot holes and use bolts, nuts and flat and slotted washers instead of the
tapping screws.)
3. Screw washers and knobs into the unit. Set the unit to the hanger and tighten the knobs.
For added support,
use nuts, bolts and
washers instead of
tapping screws.
100
Flat
washer
112
115
306
265
Tapping
screw
M5 bolt
Slotted washer
Flat washer
Flat washer
M5 nut
Knob
Washer
100
303
190
90
126
150
155
150
Figure 1-1 How to install the transceiver unit in the hanger
1-1
Console mounting
Mounting considerations
In addition to the general mounting considerations mentioned on the previous page, keep the
following points in mind when selecting a mounting location:
• Select a place where the LCD can be easily viewed, keeping in mind the LCD viewing angle
is as shown in Figure 1-2.
• Leave sufficient space around the unit to permit dispersal of heat after a long transmission.
How to mount the transceiver unit in a console
This method does not require any additional kit. However, the dimensions of the cutout must be
accurate since the hanger also is installed. Prepare a cutout in the mounting location whose
dimensions are as shown in Figure 1-2.
LCD Viewing
Angle
Figure 1-2 Mounting dimensions for console mounting
10°
40°
112
37.5
99
103
90
1-2
1.2 Mounting of Antenna Coupler
The antenna coupler is installed between the antenna and the transceiver, and tunes the antenna
to the transmitter .
Mounting considerations
The splashproof construction of the antenna coupler permits installation indoors or outdoors.
When selecting a location, keep in mind the following points:
• All wires from the coupler to the antenna radiate radio energy. Keep wires as short as possible and routed away from any grounded conductors such as lifelines, mast shrouds, or
fittings.
• For optimum radio energy, locate the coupler close to the antenna base and as near to the
ground as possible.
• For outdoor installation, be sure to select a place where the coupler will not take a con-
tinual soaking. If necessary , cover the top and sides with a wooden housing or by sealing any
opening in the top or sides with silicone sealant.
• For indoor installation, locate the coupler away from GPS and SATNAV receivers and
radio equipment to avoid mutual interference. The lead-in wire should be as near to the
coupler as possible.
• Select a place where the coupler can be easily maintained, but where it will not interfere with
crew or passengers.
• Leave sufficient space around the sides of the coupler for maintenance and checking.
• Observe the compass safe distance listed in the Safety Instructions to prevent deviation of a
magnetic compass.
1-3
Mounting the antenna coupler
Mounting methods
The antenna coupler can be fixed to the floor, bulkhead, or on the overhead. For mounting on
the bulkhead, floor or overhead, fix the coupler with either tapping screws or M6 nuts, bolts and
washers.
INDOOR USE ONLY
Figure 1-3 Typical antenna coupler installations
1-4
How to mount the antenna coupler
For thin bulkhead, use nuts, bolts and
and washers instead of tapping screws.
Lead-in
insulator
ANTENNA SELECTOR
Wire clip
Stand-off
insulator
From antenna selector
INDOOR INSTALLATION
Figure 1-4 How to mount the antenna coupler
1-5
1.3 Ground System
A good antenna can work well only when it is connected to an efficient rf ground. Without a
good ground system, the full potential of this radio cannot be realized.
CAUTION
Ground the equipment to
prevent electrical shock
and mutual interference.
Ground for metallic hull
Run a copper strap (option or local supply) between the earth terminal on the antenna coupler
and the ship’s superstructure. The length of the copper strap should be as short as possible. (If
the coupler is mounted on a metallic mast you can ground the copper strap to the mast; weld a
stainless steel bolt to the mast and connect the copper strap there.)
Copper strap
Solder
For outdoor installation,
paint to prevent rust.
Braze
Ground plate
(piece of steel plate)
Weld to ship's superstructure.
Figure 1-5 Ground for a metallic hull
Ground for non-metallic hull
Run a copper strap (option or local supply) between the ground terminal of the antenna coupler
and the radio ground system. The length of the copper strap should be as short as possible.
Grounding the transceiver unit
Run the ground wire (supplied) between the transceiver unit and ship’s ground, to prevent
interference and protect the equipment against lightning.
1-6
1.4 Mounting of Antenna
About antennas
The antenna plays the most important role in radio communication. If it cannot receive or
transmit effectively because of improper installation, even the most sophisticated transceiver
will be rendered useless.
There are various types of SSB antennas. The most commonly used are a long wire and a whip.
Whatever antenna is to be used, the antenna coupler can tune a long wire or whip whose total
length is 6 to 15 meters. Although a longer antenna is preferable when the radio is operated only
on low frequencies, use this size of antenna to ensure stable automatic tuning on all bands.
A long wire antenna is inexpensive and in general provides better performance than a whip
antenna, provided the vertical part is long enough.
A whip antenna is easier than a long wire antenna to install and provides good overall coverage
of most SSB frequencies. In fact, if you don’t plan to venture more than 500 miles from shore
and the ground system is excellent, a simple 7 m (23 feet) whip antenna will probably suffice.
A whip is installed as high as possible (though height is not so critical as with VHF since SSB
is frequency dependent, not range dependent), away from any nearby objects.
Mounting considerations
When selecting a mounting location, keep the following points in mind:
• The length of the vertical portion should be longer than 4 meters, and the slant angle of that
part should be within 10 degrees of vertical.
• Separate the antenna as far away as possible from stays, metallic objects, direction finder
antenna, Inmarsat antenna.
• Locate the insulator away from funnels and masts.
• If the antenna coupler is installed outdoors, use a lead-in insulator to make the connection. If
necessary, use a high quality antenna switch and stand-off insulator.
• If the antenna is connected directly to the coupler , use a strain insulator to prevent insulator
fatigue.
1-7
Typical antenna installations
Long wire antenna Whip antenna
Ship station
On ship stations, the long wire antenna is spanned
between supporting structures. The length of the
horizontal wire should be between 6 and 15
meters. And the length of the vertical wire should
be no less than 5 meters, the longer the better
transmission.
Sailboat
On sailboats, the long wire antenna is mounted on
the backstay using special high-voltage insulators.
Make sure the selected location is sufficiently apart
from any metal riggings which might cause
detuning. If a wire topping lift is used with an insulated backstay, special care must be taken to
ensure the topping lift does not get caught in the
backstay since the antenna may be shorted to
ground—damaging the transmitter.
Power boats
On power boats, selection of a mounting location
for a whip antenna is much easier, since there is
no mast or deck fixture to worry about. A whip
antenna can be installed almost anywhere,
again the higher the better. If your boat has a
flybridge, install it there. If not, install it atop the
cabin. Make sure the mounting location is
sufficiently apart from any nearby objects
which might affect communication.
Fishing boat/Sailboat
For whip antenna installation on a fishing boat or
sailboat, the mounting location must be chosen
carefully so as not to interfere with vessel
operation. In case of a sailboat, locate the
antenna away from the spinnaker, jib and of
course the boom. Stay especially clear of the
backstay. The taffrail is a good location in the
event of dismasting, since the antenna won’t
be carried away. The best location, however, is
atop the mast, the higher the better for effective
communication. It is always a good idea to keep
spare wire or an emergency antenna onboard in
case of an emergency.
Figure 1-6 Typical antenna installations
1-8
2. WIRING
Total length of
antenna should
be 6 to 15 meters.
Fuse Holders
Power Cable
(RED)
_
+
*
*
Not used
12VDC
(BLK)
Min
120AH
Antenna
Handset
(option)
Coax.
Cable
Control Cable
DSC Terminal
NBDP Terminal
Remote Station
Speaker
(option)
Dimensions in millimeters unless noted
* Cable fabrication required.
CONTROL CABLE 05S0949-0 05S0462-1 COAX. CABLE
90
Drain Wire
5
otherwise.
10
Sheath Shield
Ground
wire
25
Inner Core
Cover drain wire with vinyl tubing.
Fasten with screw on shield case.
(See next page.)
Figure 2-1 General wiring diagram
Insulator
2-1
Leave slack in wires
to prevent breakage.
Shield case
Antenna
wire
7
6
5
TB2
4
32
1
DUMMY
THRU
NC (IANT)
BUSY
TUNE
GND
+12 V
TB1
GRN
YEL
ORG
RED
BRN
BLK
WHT
7
6
5
4
3
2
1
Fasten drain
wire here.
Ground
plate
Clamp cable
at shield.
Ground
terminal
Control cable
Coaxial cable
Copper strap
(Connect to ground.)
Figure 2-2 Connections inside the antenna coupler
2-2
3. WIRING OF OPTIONAL EQUIPMENT
3.1 NBDP Terminal DP-6
The NBDP Terminal connects to the REMOTE connector on the FS-1503. It has a remote
control function which automatically sets class of emission and frequency data at the FS-1503.
Remarks on connection
Connect the NBDP Terminal to the FS-1503 with a 13-pair twisted cable. For the cable with no
connectors, attach connector types SRCN (at FS-1503) and D-sub (at DP-6). For cable with Dsub connector, connect the SRCN connector at the FS-1503 side.
Necessary parts, interconnection
Requires REMOTE-A Kit. Install the board following the illustration on page 3-3. Note that a
narrow bandpass filter is also available. For connection, interconnection diagram on page S-1.
Contents of REMOTE-A Kit OP05-82 (Code no. 005-939-810)
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)rotcennocETOMER(
7540P50089-048-5001
8290S50044-031-0001
3.2 DSC Terminal DSC-60
The DSC Terminal connects to the REMOTE connector on the FS-1503.
Remarks on connection
When both the NBDP Terminal and DSC Terminal are to be connected, connect them via the
Distributor DB-500.
Necessary parts, interconnection
Requires REMOTE-A Kit. Install the board following the illustration on page 3-3. Note that a
narrow bandpass filter is also available. See the interconnection diagram on page S-1.
3-1
3.3 Remote Station RB-500
Connect to the REMOTE connector on the FS-1503. If more than two RB-500s or DSC, NBDP
are to be installed, connect them via the Distributor DB-500.
Necessary parts
Requires REMOTE-B Kit (current loop) for connection of a single remote station or REMOTEA Kit when the DB-500 is connected. Install the board following the illustration on page 3-3.
Contents of REMOTE-B Kit OP05-83 (Code no. 005-939-820)
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ETOMERBCP
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8540P50099-048-5001
8290S50044-031-0001
3.4 Distributor DB-120/DB-500
A distributor enables connection of multiple external equipment. The DB-120 connects one
NBDP Terminal and one DSC Terminal, and the DB-500 connects up to four external equipment: one NBDP terminal, one DSC terminal, and two remote stations. In either case the REMOTE-A board is also required.
NBDP TERMINAL
SSB
DISTRIBUTOR
DB-500
DSC TERMINAL
REMOTE STATION
REMOTE STATION
Figure 3-2 Function of the Distributor DB-500
3-2
3.5 REMOTE and CONTROL Boards
1
1.Remove cover and shield cover.
PAN HEAD SCREW
M3X6 (9 PCS.)
COVER
2
1. Unplug all connectors from TX/RX Board; dismount the board.
J4
J1
BOTTOM VIEW
U27 U26
SHIELD
COVER
GASKET
HANGER GASKET
3
1. Solder CONTROL Board and/or REMOTE Board to
BINDING SCREW
M4X10 (6 PCS.)
MAIN BODY
TX/RX Board.
2. Coat left rear corner and right front corner of CONTROL
and REMOTE Boards with silicone sealant (type KE 348TRTV, FURUNO code no. 000-801-041).
3. Fasten CONTROL connector and/or REMOTE
connector.
CONTROL BOARD
05P0549
REMOTE-A BOARD 05P0457
or
REMOTE-B BOARD 05P0458
CONTROL
CONNECTOR
ASSY.
TOP
VIEW
U26
U27
TX/RX BOARD
GASKET (3)
FLAT WASHER
NUT
PLUG
GASKET
REMOTE
CONNECTOR
ASSY.*
PAN HEAD SCREW
* Male and female connector
attached.
J2
J10
TX/RX BOARD
J8
4
3
05P0666
J6
J9
1. Mount TX/RX Board.
J11
J7
2. Plug in REMOTE connector and/or CONTROL
connector to TX/RX Board.
3. Attach connectors to the TX/RX Board.
4. Attach shield cover.
REMOTE CONNECTOR (16P)
CONTROL CONNECTOR (7P)
J5
J4
J1
J1
U27 U26
PAN HEAD SCREW
M3X10
J2
TX/RX BOARD
05P0666
J10
J8
J6
J9
PAN HEAD SCREW
M3X10 (2 PCS.)
PAN HEAD SCREW
M3X8 (5 PCS.)
BOTTOM
VIEW
J3
J11
J7
5
1. Attach vinyl tape (approx. 50 mm) to each outside corner of cover.
2. Insert gasket, and then fix it with vinyl tape at corners of cover.
3. Insert main body to cover.
4. Remove vinyl tape.
5. Fasten cover to main body with binding screws.
COVER
ATTACH VINYL
TAPE
GASKET
Figure 3-3 Installation of REMOTE and CONTROL boards
3-3
Vinyl tape
Cover
Groove is outside.
Gasket
3.6 BK (Break-in) Connection
BK (Break-in) connection is necessary when the FS-1503 is installed together with an HF
receiver or transceiver . The BK circuit functions to mute the receiver when it and the FS-1503
are operated together. W ith no BK connection, the receiver may generate un wanted noise or its
front end may be damaged by strong signals when the radio is transmitted.
Necessary parts
The BK function requires the CONTROL Kit, which consists of the CONTROL Board, connector assy., gasket and washer. Install the board following the illustration on page 3-6. For
connections, see the interconnection diagram on page S-1.
Contents of CONTROL Kit OP05-41 (Code no. 005-920-330)
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BCPLORTNOC9540P50000-148-5001
)3(teksaG3-2210-920-50348-780-0011
.yssArotcennoC6480S50913-521-0001
rehsaW5.0x0.22x2.61948-108-0001
3.7 Telex Filter (Bandpass Filter)
The Telex filter is installed on the TX/RX Board. Install it as shown in the figure below.
This filter has been
mounted at factory
on the FS-1503A.
TX/RX BOARD
05P0666
Solder Telex
OUT IN
E E
FL3
filter to FL3.
Note direction
on underside of
filter.
Figure 3-4 TX/RX Board, installation of Telex filter
3-4
3.8 SW Regulator (SW REG board)
The FS-1503 is supplied with negative ground. If necessary, to float the battery negative line,
the SW REG Kit is available. Install the kit following the illustration below.
J5
J6
PA/FIL BOARD
05P0667
2 Fasten SW. REG Board with five
pan head screws-B (M3X8).
4 Connect CONNECTOR
ASSY. (2 PCS.)
J3
J7
5 Fasten shield cover
with four screws
(M3 x 6).
SW. REG BOARD
05P0668
J2
3 Fasten FETs with
screw-A (M3 x 8).
J1
1 Place heat sheet on pedestal.
J2
Figure 3-5 Transceiver unit, top view, installation of SW REG Board
Contents of SW REG Kit OP05-84 (Code no. 005-939-830)
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GERWS8660P50038-049-5001
.yssArotcennoC001-040HP434-031-0002
teehStaeH02-GFB011-935-0002
wercS6x3M301-188-0004 revocdleihsroF
A-wercS8x3M401-188-0002TEFroF
B-wercS8x3M404-188-0005 bcpGERWSroF
revoCdleihS1411-770-50048-352-0011
3-5
3.9 Dummy Load
The dummy load enables testing of the two-tone alarm. Install the board following the figure
below. CHANGE SYSTEM SETTING 9917 to 1.
W4 should not touch
TB4 or W3.
TB4
ANT
Gap between inner wall
and wire should be more
than 15 mm.
W4 WIRE ASSY .
W3 WIRE ASSY .
NOTICE
Separate wire assemblies
W3 and W4 more than
15 mm from each other.
Fasten dummy load
assy. to shield case
with four existing
screws (4 pcs.).
Fasten wire with cable tie.
TB2
TX
OUT
DUMMY CONT
BOARD 05P0670
TB1
TX
IN
DUMMY LOAD ASSY.
Separare these wires: Bend crimp-on
lug attached to TB1 upward; bend
crimp-on lug attached to TB3 downward.
W6
WIRE ASSY.
TB3
DUMMY
J
J1
E
TB4
J2
NOTICE
Do not route
wires within
this area.
TB3
E
W5
WIRE ASSY.
Figure 3-6 COUPLER board, installation of dummy load
3-6
3.10 Floating Ground Radiotelephone (FS-5000, etc.)
Connect the FS-1503 to the floating ground radiotelephone with a connection cable whose
diameter is 0.75 mm2 or larger (3C cable or equivalent).
FS-1503
Figure 3-7 Connection of floating ground radiotelephone
3-7
4. INSTALLATION CHECK
4.1 lnstallation Checks
After completing the installation, check the FS-1503 and all equipment connected to it for
proper connection and operation.
Visual checks
Before turning on the radiotelephone, visually check it as follows:
Antenna
1) Are fixing bolts, wire clips, shackles securely tightened?
2) Are the antenna and/or coaxial lead-in waterproofed?
3) Is the antenna wire securely connected to the coupler?
4) Make sure no mechanical stress is applied to the antenna at the connection with the coupler.
Antenna coupler
1) Is the unit perfectly grounded?
2) Is the length of the ground wire as short as possible?
3) Is the ventilation seal attached?
4) Are all wirings correctly made?
Transceiver unit
1) Is the unit grounded with the supplied ground wire? Length of the wire is as short as pos-
sible?
2) Are all wirings correctly made?
3) Are all connectors securely tightened?
Optional equipment
1) Is the unit grounded?
2) Are all wirings between the unit and the FS-1503 correctly made?
3) Are all connectors securely tightened?
Supply voltage
The transceiver unit should be off to check supply voltage. Measure supply voltage at the POWER
connector. It should be 13.6 VDC ±15%.
4-1
Performance
If no problems were found in the preceding sections, then turn on the transceiver and check it
for proper performance.
Receiver
1. Turn on the loudspeaker.
2. Turn off the squelch.
3. Check that all the bands can be received clearly.
If signal strength is too low or there is too much noise return to “Visual check” and recheck.
Double check the antenna and ground. If there is no trouble, proceed to the next step.
Transmitter
On each band, confirm that the antenna is automatically tuned when the [TUNE/7] key or the
PTT switch is pressed. (“OK” appears when tuning is successfully completed.)
Automatic tuning of the antenna should take no longer than 15 seconds. If you find a channel
which takes more than 15 seconds to tune, recheck antenna length and ground.
Noise
Noise generated on board or by electrical storms can severely degrade communication. Stormgenerated static, unfortunately, is impossible to suppress or eliminate. Radio traffic on lower
frequency bands is sometimes completely blocked out in certain areas.
Man-made noise, however, can often be suppressed by a marine electronics technician, using
special noise filtering and shielding techniques. In most cases the source of electrical noise is
the ignition system, although generators, alternators, winches, pumps, radar and echo sounder
can interfere with radio communication as well.
Turn on electrical equipment one by one to check for interference to the FS-1503.
Because no two boats are built or equipped exactly alike, there is no one general noise suppress-
ing technique that can be applied to all cases. If electrical noise interferes with SSB operation,
consult a marine electronics technician.
4.2 User Channel Registration
Register permitted frequencies, referring to the operator’s manual.
4-2
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