SAFETY INSTRUCTIONS
DANGER
Never touch the SSB antenna, antenna
coupler or lead-in insulator when the
SSB radiotelephone is transmitting.
CAUTION
Ground the equipment to
prevent electrical shock and
mutual interference.
High voltage which will cause death or
serious injury is present at the locations
mentioned above when the SSB radio-
telephone is transmitting.
Observe the following compass safe
distances:
Equipment
Standard Steering
compass
compass
Antenna
Wire
Indoor
Antenna Wire
(High Voltage)
Transceiver
Ant. Coupler
MIC, Handset
1.1 m
0.6 m
0.6 m
0.8 m
0.5 m
0.4 m
Lead-in
Insulator
(High
Antenna
Coupler
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 electri-
cal shock.
Turn off the power at the switchboard
before beginning the installation.
Fire or electrical shock can result if the
power is left on.
i
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 DRAWINGS..............................................................................................D-1
SCHEMATIC DIAGRAMS....................................................................................... S-1
ii
EQUIPMENT LISTS
Standard Set
Name
Type
FS-1503
FS-1503A
AT-1503
Code No.
Qty
Remarks
With power cable
Transceiver Unit
—
—
—
1
For U.S.A
Antenna Coupler
Accessories
1
1
1
1
1
1
With MIC
FP05-05000 000-050-908
FP05-05010 000-050-909
No MIC
Spare Parts
005-939-850
000-050-906
For transceiver unit
With antenna coupler
No antenna coupler
SP05-04400
CP05-07600
Installation
Materials
CP05-07610 000-050-907
Note: See packing lists on pages A-1 to A-4 for details.
iii
Optional Equipment
Name
Type
PR-270
PC-220
Code No.
—
Qty
1
Remarks
AC-DC Power
DC-DC Converter
REMOTE-A Kit
REMOTE-B Kit
CONTROL Kit
Bandpass Filter
SW REG Kit
—
1
OP05-82
OP05-83
OP05-41
SF0L04
005-939-810
005-939-820
005-920-330
000-116-693
005-939-830
005-939-840
000-572-128
000-572-108
000-572-109
000-107-921
000-107-920
000-050-632
000-050-634
1
For RS-232C
1
For current loop
1
BK connection
1
For NBDP/DSC Terminal
OP05-84
OP05-85
FAW-6D
FAW6R2
FAW-6RP2
FAW-6R2A
FAW-6RP2A
E22
1
1
Dummy Load Assy.
Whip Antenna
Whip Antenna
Whip Antenna
Whip Antenna
Whip Antenna
Doublet Antenna
1
1
1
1
1
1
Single Wire
Antenna
E24
Double-span
Antenna
E25
000-050-635
000-050-636
000-050-637
1
1
1
Whip Antenna
Lead-in Kit
E26
Whip Antenna
Feeder
E27
Handset
HS-6000FZ5
000-112-623
000-116-487
1
1
Noise-cancelling
MIC
M112D
4509910
Distributor
DB-120
—
1
1
1
1
1
Distributor
—
—
DB-500-RS(E)
RB-500
Remote Station
Earth Plate
04S40801
05S0949
000-572-187
30x1200x0.3 mm
Coaxial Cable
000-130-485-
(6,7,8)
20, 30, 40, 50 m
Control Cable
05S0462
000-113-361-
(2,3,4)
1
1
20, 30, 40, 50 m
External
SEM-21Q
000-144-917
Loudspeaker
iv
SYSTEM CONFIGURATION
FS-1503 SYSTEM CONFIGURATION
Antenna Coupler
AT-1503
DSC Terminal
DSC-5/6
NBDP Terminal
DP-5/6
Distributor
DB-500
Remote Station
RB-500
OR
Distributor
DB-120
Transceiver Unit
FS-1503
*
SSB TRANSCEIVER FS-1503
AGC
STATION
MODE
1
CURS
2
CLARI
3
TX
SQL
5
SCAN
6
RX
4
SIMP
R
6
0
2
4
8
10
S
AGC NB
TUNE
7
H/L
8
CH
9
H3E
START
INT
0
MIC
VOLUME
RF GAIN
FREQ/CH
2182
ALM
ENT
TEST
OFF
External
Speaker
MIC
DSC Terminal
DSC-60
(Handset
optionally
available)
NBDP Terminal
DP-6
13.6 V
13.6 V
PC-220
PR-270
Option
* Optional pcb (REMOTE A or
REMOTE B) required.
24 VDC
100/110/200/220 VAC
13.6 VDC
FS-1503 system configuration
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 mount-
ing location by lining block or doubling plate.
• Locate the unit where it is easily accessible and does not interfere with personnel or opera-
tion 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.
M5 bolt
Slotted washer
306
Flat washer
112
265
Tapping
screw
Flat washer
M5 nut
Flat
washer
Knob
Washer
115
100
100
150
150
90
155
190
126
303
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
40°
99
10°
112
37.5
90
103
Figure 1-2 Mounting dimensions for console mounting
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 pos-
sible 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
From antenna selector
Stand-off
insulator
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
Braze
Ground plate
(piece of steel plate)
Solder
Weld to ship's superstructure.
For outdoor installation,
paint to prevent rust.
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
Ship station
Whip antenna
Power boats
On ship stations, the long wire antenna is spanned On power boats, selection of a mounting location
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.
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.
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 insu-
lated 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.
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)
_
(BLK)
+
Handset
(option)
*
*
Min
120AH
12VDC
Not used
Antenna
Coax.
Cable
Control Cable
Ground
wire
DSC Terminal
NBDP Terminal
Remote Station
Speaker
(option)
Dimensions in millimeters unless noted
otherwise.
* Cable fabrication required.
CONTROL CABLE 05S0949-0
05S0462-1 COAX. CABLE
5
10
25
90
Drain Wire
Inner Core
Sheath
Shield
Cover drain wire with vinyl tubing.
Fasten with screw on shield case.
(See next page.)
Insulator
Figure 2-1 General wiring diagram
2-1
Leave slack in wires
to prevent breakage.
7
6
DUMMY
THRU
GRN
YEL
Antenna
wire
NC (IANT)
BUSY
ORG
RED
5
4
3
2
BRN
BLK
TUNE
GND
+12 V
WHT
1
Shield case
TB1
TB2
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 D-
sub 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)
Name
Type
Code No.
Qty
05P0457
005-840-980
1
REMOTE PCB
Connector Assy.
(REMOTE connector)
05S0928
000-130-440
1
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 REMOTE-
A 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)
Name
Type
Code No.
Qty
05P0458
005-840-990
1
REMOTE PCB
Connector Assy.
(REMOTE connector)
05S0928
000-130-440
1
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 equip-
ment: one NBDP terminal, one DSC terminal, and two remote stations. In either case the RE-
MOTE-A board is also required.
NBDP TERMINAL
DISTRIBUTOR
SSB
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.
2
1. Unplug all connectors from TX/RX Board; dismount the board.
COVER
BOTTOM VIEW
J4
PAN HEAD SCREW
M3X6 (9 PCS.)
J1
U27
U26
SHIELD
COVER
BINDING SCREW
M4X10 (6 PCS.)
J2
J8
TX/RX BOARD
05P0666
GASKET
J11
J10
J7
J9
J6
MAIN BODY
HANGER GASKET
4
3
1. Mount TX/RX Board.
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.
1. Solder CONTROL Board and/or REMOTE Board to
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.
REMOTE CONNECTOR (16P)
CONTROL CONNECTOR (7P)
BOTTOM
VIEW
CONTROL BOARD
05P0549
CONTROL
CONNECTOR
ASSY.
REMOTE-A BOARD 05P0457
or
REMOTE-B BOARD 05P0458
J3
J5
J4
U27
J1
TOP
U26
VIEW
PAN HEAD SCREW
M3X10
GASKET (3)
FLAT WASHER
NUT
J2
TX/RX BOARD
05P0666
TX/RX BOARD
GASKET
REMOTE
CONNECTOR
ASSY.*
J8
PAN HEAD SCREW
M3X10 (2 PCS.)
PLUG
J11
PAN HEAD SCREW
PAN HEAD SCREW
M3X8 (5 PCS.)
J10
J7
J9
J6
* Male and female connector
attached.
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.
Vinyl tape
COVER
Cover
Groove is outside.
Gasket
ATTACH VINYL
TAPE
GASKET
Figure 3-3 Installation of REMOTE and CONTROL boards
3-3
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. With no BK connection, the receiver may generate unwanted 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, con-
nector 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)
Name
CONTROL PCB
Gasket (3)
Type
05P0459
Code No.
Qty
1
005-841-000
05-029-0122-3 100-087-843
05S0846 000-125-319
16.2x22.0x0.5 000-801-849
1
Connector Assy.
Washer
1
1
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
filter to FL3.
Note direction
on underside of
filter.
OUT
E
IN
E
FL3
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.)
5 Fasten shield cover
J3
with four screws
(M3 x 6).
J7
SW. REG BOARD
05P0668
J1
J2
J2
3 Fasten FETs with
1 Place heat sheet on pedestal.
screw-A (M3 x 8).
Figure 3-5 Transceiver unit, top view, installation of SW REG Board
Contents of SW REG Kit OP05-84 (Code no. 005-939-830)
Name
SW REG
Type
05P0668
Code No.
005-940-830
000-130-434
000-539-110
000-881-103
000-881-104
000-881-404
100-253-840
Qty
1
Remarks
Connector Assy.
Heat Sheet
Screw
PH040-100
BFG-20
2
2
M3 x 6
4
For shield cover
For FET
Screw-A
M3 x 8
2
Screw-B
M3 x 8
5
For SW REG pcb
Shield Cover
05-077-1141
1
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
Fasten wire with cable tie.
Gap between inner wall
and wire should be more
than 15 mm.
W4 WIRE ASSY.
Separare these wires: Bend crimp-on
lug attached to TB1 upward; bend
crimp-on lug attached to TB3 downward.
W3 WIRE ASSY.
NOTICE
W6
Separate wire assemblies
WIRE ASSY.
W3 and W4 more than
15 mm from each other.
TB2
TB3
TB1
TX
OUT
NOTICE
TX
IN
DUMMY
Do not route
wires within
this area.
J1
J2
DUMMY CONT
BOARD 05P0670
E
TB4
Fasten dummy load
assy. to shield case
with four existing
screws (4 pcs.).
TB3
E
DUMMY LOAD ASSY.
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. Storm-
generated 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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