Icom Marine Radio IC M503 User Manual

INSTRUCTION MANUAL  
VHF MARINE TRANSCEIVER  
iM503  
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TABLE OF CONTENTS  
IN CASE OF EMERGENCY........................i  
TABLE OF CONTENTS ..............................ii  
IMPORTANT ..............................................iii  
CAUTIONS.................................................iii  
8
CONNECTIONS AND  
I Setting tag channels ...................... 36  
I Dualwatch/Tri-watch operation ...... 36  
I Set mode programming ................. 37  
I Intercom operation ......................... 38  
I Channel names .............................. 38  
13 HM-134 CONNECTIONS AND  
MAINTENANCE ......................... 1824  
I Unpacking ...................................... 18  
I Antenna ......................................... 18  
I Fuse replacement .......................... 18  
I Cleaning ......................................... 18  
I Connections ................................... 19  
I Microphone hanger ........................ 20  
I Mounting the transceiver ............... 21  
I Optional unit installation ................. 23  
I Dimensions..................................... 24  
TROUBLESHOOTING ...................... 25  
1
2
OPERATING RULES .......................... 1  
PANEL DESCRIPTION .................. 2–5  
I Panel description ............................. 2  
I Function display ............................... 4  
I Microphone ...................................... 5  
BASIC OPERATION .................... 610  
I Channel selection ............................ 6  
I Receiving and transmitting .............. 8  
I Call channel programming ............... 9  
I Channel names ................................ 9  
INSTALLATION ........................... 39-41  
I HM-134 supplied accessories .........39  
I Installation .......................................39  
MB-75 TEMPLATE  
INSTALLATION NOTES  
3
9
10 CHANNEL LIST ................................ 26  
11 SPECIFICATIONS AND OPTIONS ... 27  
I Specifications ................................. 27  
I Options .......................................... 27  
12 HM-134 REMOTE-CONTROL  
I
Optional voice scrambler operation .. 10  
4
5
DUALWATCH/TRI-WATCH ............... 11  
I Description ..................................... 11  
I Operation ....................................... 11  
SCAN OPERATIONS ................. 1213  
I Scan types ..................................... 12  
I Setting tag channels ...................... 13  
I Starting a scan ............................... 13  
SET MODE ................................. 1416  
I Set mode programming ................. 14  
I Set mode items .............................. 15  
INTERCOM OPERATION ................. 17  
I Intercom operation ......................... 17  
MICROPHONE ........................... 28-38  
I Panel description ........................... 28  
I Function display ............................. 30  
I Channel selection .......................... 32  
I Receiving and transmitting ............ 33  
I Lock functions ................................ 34  
I Display backlighting ....................... 34  
I Monitor function ............................. 34  
I Call channel programming ............. 35  
I Optional voice scrambler  
6
7
operation......................................... 35  
I Starting a scan ............................... 36  
ii  
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IMPORTANT  
READ ALL INSTRUCTIONS carefully and completely  
before using the transceiver.  
SAVE THIS INSTRUCTION MANUAL This in-  
struction manual contains important operating instructions for  
the IC-M503.  
CAUTIONS  
RWARNING! NEVER connect the transceiver to an AC  
outlet. This may pose a fire hazard or result in an electric  
shock.  
atures below –20°C or above +60°C or, in areas subject to di-  
rect sunlight, such as the cockpit.  
AVOID the use of chemical agents such as benzine or al-  
cohol when cleaning, as they may damage the transceiver  
surfaces.  
NEVER connect the transceiver to a power source of more  
than 15.6 V DC or using reverse polarity. This will ruin the  
transceiver.  
BE CAREFUL! The transceiver rear panel will become  
hot when operating continuously for long periods.  
NEVER cut the DC power cable between the DC plug and  
fuse holder. If an incorrect connection is made after cutting,  
the transceiver may be damaged.  
BE CAREFUL! The optional HM-134 remote-control mi-  
crophone’s rear panel will become hot when monitoring con-  
tinuously for long periods.  
NEVER place the transceiver where normal operation of the  
vessel may be hindered or where it could cause bodily injury.  
Place the transceiver in a secure place to avoid inadvertent  
use by children.  
KEEP the transceiver at least 1 m away from the ship’s nav-  
igation compass.  
After exposure to salt water, clean the transceiver thoroughly  
with fresh water to avoid corrosion.  
DO NOT use or place the transceiver in areas with temper-  
iii  
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OPERATING RULES  
1
(2) OPERATOR’S LICENSE  
ï
PRIORITIES  
A Restricted Radiotelephone Operator Permit is the license  
most often held by small ship radio operators when a radio  
is not required for safety purposes.  
Read all rules and regulations pertaining to priorities and  
keep an up-to-date copy handy. Safety and distress calls  
take priority over all others.  
You must monitor Channel 16 when you are not operating  
on another channel.  
The Restricted Radiotelephone Operator Permit must be  
posted or kept with the operator. Only a licensed radio opera-  
tor may operate a transceiver.  
False or fraudulent distress signals are prohibited and pun-  
ishable by law.  
However, non-licensed individuals may talk over a transceiver  
if a licensed operator starts, supervises, ends the call and  
makes the necessary log entries.  
ï
PRIVACY  
Information overheard but not intended for you cannot law-  
fully be used in any way.  
Keep a copy of the current government rules and regulations  
handy.  
Indecent or profane language is prohibited.  
ï
RADIO LICENSES  
(1) SHIP STATION LICENSE  
You must have a current radio station license before using the  
transceiver. It is unlawful to operate a ship station which is not  
licensed.  
Inquire through your dealer or the appropriate government  
agency for a Ship-Radiotelephone license application. This  
government-issued license states the call sign which is your  
ship’s identification for radio purposes.  
1
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PANEL DESCRIPTION  
2
I Panel description  
!
1
!
0
o
i
VHF MARINE  
iM503  
Function  
display  
16  
WATER RESISTANT  
Speaker  
SCAN  
TAG  
DUAL  
HI/LO  
DIAL  
CALL  
q
DIMMER  
POWER  
VOL  
SQL  
w
e
r
t
y
u
q POWER SWITCH [POWER]  
r TRANSMIT POWER SWITCH [HI/LO]  
Push to Toggle high and low power . (p. 8)  
Some channels are set to low power only.  
Push to toggle the transceiver power ON and OFF.  
While pushing and holding this switch, other switches  
perform secondary functions.  
w VOLUME CONTROL [VOL]  
Adjusts the audio level. (p. 8)  
e SQUELCH CONTROL [SQL]  
Sets the squelch threshold level. (p. 8)  
2
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PANEL DESCRIPTION  
2
function is not available.  
t CHANNEL SELECTOR [CHANNEL]  
Rotate [CHANNEL] to select the operating channels, set  
mode contents, etc. (p. 8)  
! SCAN SWITCH [SCAN/TAG] (p. 13)  
When tag channels are programmed, starts and stops  
normal or priority scan.  
Push and hold [SCAN/TAG] for 1 sec. to set the dis-  
played channel as a tag (scanned) channel.  
While pushing and holding [HI/LO], push and hold for 3  
sec. to clear all tag channels.  
y DIMMER SWITCH [DIMMER]  
Push to select one of 8 backlighting (LCD and switches)  
levels.  
Push and hold for 1 sec. to turn the intercom mode ON.  
! DUALWATCH/TRI-WATCH SWITCH [DUAL] (p. 11)  
Push to start dualwatch or tri-watch.  
When dualwatch/tri-watch is activated, push to stop  
them.  
u CALL CHANNEL SWITCH [CALL]  
Push to select the call channel. (p. 6)  
Push and hold for 3 sec. to enter call channel program-  
ming condition. (p. 9)  
While pushing and holding [HI/LO], enters memory  
name programming condition. (p. 9)  
i CHANNEL 16 SWITCH [16]  
Push to select Channel 16. (p. 6)  
While turning power ON, push to enter initial set mode.  
(p. 14)  
o DIAL SWITCH [DIAL]  
Push to exit from Channel 16 or call channel.  
(p. 6)  
While pushing and holding [HI/LO], push to select chan-  
nel group. (pgs. 6, 7)  
The EURversion has International channels only and this  
3
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PANEL DESCRIPTION  
2
to approx. 10 V DC or below.  
DUALappears during dualwatch; TRIappears dur-  
ing tri-watch. (p. 11)  
WAITappears in the IC-M503 display while transmit-  
ting via the HM-134 remote-control microphone.  
In the above case, the connected HM-134 has priority.  
LSTNappears in the IC-M503 display when pushing  
the PTT switch on the HM-134, while the intercom func-  
tion is activated.  
I Function display  
o
i
q
w
e
r
BUSY  
25W  
INT  
CALL  
u
TAG SC DUP  
CALLING  
t SCRAMBLER INDICATOR (p. 10)  
t y  
Appears when the optional voice scrambler is activated.  
y DUPLEX INDICATOR  
Appears when a duplex channel is selected.  
q BUSY/TRANSMIT INDICATOR (p. 8)  
u CHANNEL NUMBER READOUT  
BUSYappears when receiving a signal or when the  
squelch opens.  
TXappears while transmitting.  
Indicates the selected operating channel number. A”  
appears when a simplex channel is selected. (p. 6)  
In set mode, indicates the selected condition. (pgs.  
15,16)  
w POWER INDICATOR (p. 8)  
25Wappears when high power is selected.  
1Wappears when low power is selected.  
i CHANNEL GROUP INDICATOR (p. 6)  
Indicates whether an International, U.S.A., Holland, DSC  
or ATIS channel is selected.  
e TAG CHANNEL INDICATOR (p. 13)  
Appears when a tag channel is selected.  
Available channel groups depend on version.  
r CHANNEL NAME INDICATOR  
o CALL CHANNEL INDICATOR (pgs. 6, 9)  
Channel comment appears if programmed. (p. 9)  
Low Batteryappears when the battery voltage drops  
Appears when a call channel is selected.  
4
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PANEL DESCRIPTION  
2
I Microphone  
q
Speaker  
Microphone  
w
e
q PTT SWITCH [PTT]  
Push and hold to transmit; release to receive. (p. 8)  
w CHANNEL UP/DOWN SWITCHES [Y]/[Z]  
Push either switch to change the operating memory chan-  
nel, set mode contents, etc. (p. 8)  
e TRANSMIT POWER SWITCH [HI/LO]  
Same as the [HI/LO] switch on the front panel.  
When pushed at power ON, toggles the [Y]/[Z] and  
[HI/LO] switch functions ON and OFF.  
5
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BASIC OPERATION  
3
Push [CALL] to select the call channel of the selected  
channel group.  
I Channel selection  
CALLand call channel number appear.  
ï
Channel 16  
Push [DIAL] to return to the condition before selecting call  
channel, or rotate [CHANNEL] to select operating channel.  
Channel 16 is the distress and safety channel. It is used for  
establishing initial contact with another station and for emer-  
gency communications. Channel 16 is monitored during both  
dualwatch and tri-watch. While standing by, you must monitor  
Channel 16.  
INT  
25W  
CALL  
CALL  
Push  
TAG  
Push [16] to select Channel 16.  
CALLING  
Output power turns to 25Wautomatically, whenever Channel  
16 is selected. For example, when selecting Channel 16 via the  
dial, a scan stops at Channel 16 or [16C] on the HM-134 is  
pushed, etc.  
ï
International channels  
There are 57 International channels for the IC-M503.  
Push [DIAL] to return to the condition before selecting Chan-  
nel 16, or rotate [CHANNEL] to select operating channel.  
Output power returns to the previous output power automatically.  
q Push [DIAL] to select a regular channel.  
w While pushing and holding [HI/LO], push [DIAL]to change  
the channel group, if necessary.  
INT  
25W  
INTappears when International channels are selected.  
e Rotate the channel selector to select a channel.  
DUPappears for duplex channels.  
16  
Push  
TAG  
CALLING  
INT  
25W  
ï
Call channel  
TAG  
DUP  
Each regular channel group has a separate leisure-use call  
channel. The call channel is monitored during tri-watch. The  
call channels can be programmed (p. 9) and are used to store  
your most often used channels in each channel group for  
quick recall.  
INTL  
6
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BASIC OPERATION  
3
ï
U.S.A. channels (U.K. version only)  
HOLLAND  
DUP  
For the U.K. versions, there are 58 U.S.A. channels in addi-  
1W  
tion to 57 International channels.  
INTL  
q Push [DIAL] to select a regular channel.  
w While pushing and holding [HI/LO], push [DIAL] to change  
the channel group.  
International and U.S.A. channels can be selected in sequence.  
e Rotate the channel selector to select a channel.  
Channels are memorized separately for each channel group.  
ï
ATIS and DSC channels (FRG version only)  
For the FRG versions, there are 57 ATIS and 57 DSC chan-  
nels in addition to 57 International channels.  
q Push [DIAL] to select a regular channel.  
w While pushing and holding [HI/LO], push [DIAL] to change  
the channel group.  
USA  
25W  
TAG  
CCG  
International, ATIS and DSC channels can be selected in se-  
quence.  
e Rotate the channel selector to select a channel.  
Channels are memorized separately for each channel group.  
ï
Holland channels (Holland version only)  
For Holland versions, there are 59 Holland channels in addi-  
ATIS  
25W  
tion to 57 International channels.  
TAG  
DUP  
q Push [DIAL] to select a regular channel.  
INTL  
w While pushing and holding [HI/LO], push [DIAL] to change  
the channel group.  
International and Holland channels can be selected in sequence.  
e Rotate the channel selector to select a channel.  
Channels are memorized separately for each channel group.  
7
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BASIC OPERATION  
3
y Push and hold [PTT] to transmit, then speak into the mi-  
crophone.  
I Receiving and transmitting  
TXappears.  
CAUTION: Transmitting without an antenna may dam-  
age the transceiver.  
Channel 70 cannot be used for transmission (for GMDSS use).  
u Release [PTT] to receive.  
q Push [POWER] to turn power ON.  
w Set the audio and squelch levels.  
IMPORTANT: To maximize the readability of your trans-  
mitted signal, pause a few sec. after pushing [PTT], hold  
the microphone 2 to 5 cm from your mouth and speak at a  
normal voice level.  
Rotate [SQL] fully counterclockwise in advance.  
Rotate [VOL] to adjust the audio output level.  
Rotate [SQL] clockwise until the noise disappears.  
e While pushing and holding [HI/LO], push [DIAL] to change  
the channel group. (p. 6)  
The European version has International channels only.  
r Rotate the channel selector or push [Y]/[Z] on the micro-  
phone to select the desired channel.  
q t  
e
y u  
VHF MARINE  
iM503  
When receiving a signal, BUSYappears and audio is emitted  
16  
WATER RESISTANT  
from the speaker.  
SCAN  
TAG  
DUAL  
DIAL  
CALL  
Further adjustment of [VOL] may be necessary at this point.  
Use the optional voice scrambler function for privacy. (p. 10)  
t Push [HI/LO] to select the output power if necessary.  
25Wor 1Wappears when high or low power is selected, re-  
spectively.  
HI/LO  
DIMMER  
POWER  
VOL  
SQL  
Choose low power to conserve power, choose high power for  
longer distance communications.  
w
r
r
t
Some channels are for low power only.  
8
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BASIC OPERATION  
3
I Call channel programming  
I Channel names  
The call channel switch can be programmed to your most  
often-used channels in each channel group for quick recall.  
Memory channels can be tagged with alphanumeric names  
of up to 10 characters each.  
q While pushing and holding [HI/LO], push [DIAL] one or  
more times to select the desired channel group (Interna-  
tional, U.S.A., Holland, ATIS, DSC) to be programmed.  
w Push and hold [CALL] for 3 sec. to enter the call channel  
programming condition.  
Capital letters, small letters, numerals, some symbols (! " # $  
% & ' ( ) + ) and spaces can be used.  
,
.
q Select the desired memory channel.  
Cancel dual watch, tri-watch or scan in advance.  
w While pushing and holding [HI/LO], push [CALL] to edit the  
memory channel name.  
Channel number starts ashing.  
INT  
A cursor appears and blinks.  
25W  
CALL  
TAG  
INT  
25W  
CALLING  
TAG  
äLEASURE  
e Rotate the channel selector to select the desired channel.  
INT  
e Select the desired character by rotating the channel selec-  
tor or by pushing [Y]/[Z] on the microphone.  
Push and hold [SCAN] or [DIAL] for cursor movement.  
r Push [CALL] to input and set the name.  
The cursor disappears.  
25W  
CALL  
DUP  
TAG  
INTL  
r Push [CALL] to program the displayed channel as the call  
channel.  
t Repeat steps q to r to program another memory channel  
name, if desired.  
Push [DIAL] to cancel the programming.  
The channel number stops ashing.  
9
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BASIC OPERATION  
3
I Optional voice scrambler operation  
ï
ï
Activating the scrambler  
Programming scrambler codes  
The optional voice scrambler provides private communica-  
tions. In order to receive or send scrambled transmissions  
you must rst activate the scrambler function. To activate the  
function, an optional UT-98 or UT-112 is necessary. See p. 16  
for selecting the unit. Ask your dealer for details.  
There are 128 or 32 codes (0 to 127 or 1 to 32) available for  
programming. In order to understand one another, all trans-  
ceivers in your group must have the same scramble code.  
This function may not be available depending on dealer set-  
ting.  
q Select an operating channel other than Channel 16 and  
70.  
w While pushing and holding [HI/LO], push [DIMMER] to tog-  
gle an optional scrambler function ON or OFF.  
SCappears.  
q Turn power OFF.  
w While pushing and holding [16], turn power ON to enter  
set mode.  
e After the display appears, release [16].  
r Push [16] one or more times to select the scrambler code  
item.  
e To turn the scrambler function OFF, repeat step w.  
SCdisappears.  
Scrambler codeappears.  
t Rotate the channel selector to select the desired scram-  
bler code.  
y Turn power OFF, then ON again to exit set mode.  
[Example]: Programming scrambler code 127.  
16  
POWER  
16  
+
Set mode  
Beep  
Set mode  
Set mode  
Push one or  
more times.  
Enter set mode  
Scrambler  
code  
Scrambler  
code  
Select code  
Set mode  
Scrambler code item  
10  
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DUALWATCH/TRI-WATCH  
4
I Description  
I Operation  
Dualwatch monitors Channel 16 while you are receiving an-  
other channel; tri-watch monitors Channel 16 and the call  
channel while receiving another channel.  
q Select the desired operating channel.  
w Select dualwatch or tri-watch in set mode. (p. 15)  
e Push [DUAL] to start dualwatch or tri-watch.  
DUALappears during dualwatch; TRIappears during tri-  
watch.  
Beep tone sounds when a signal is received on Channel 16.  
Tri-watch becomes dualwatch when receiving a signal on the call  
channel.  
DUALWATCH/TRI-WATCH SIMULATION  
r To cancel dualwatch/tri-watch, push [DUAL] again.  
Call channel  
[Example]: Operating tri-watch on INT Channel 25.  
INT  
Tri-watch starts.  
25W  
TAG  
TRI  
DUP  
16  
BUSY  
25W  
INT  
Signal is received  
on call channel.  
CALL  
Dualwatch  
Tri-watch  
TAG  
CALLING 16  
If a signal is received on Channel 16, dualwatch/tri-watch pauses  
on Channel 16 until the signal disappears.  
If a signal is received on the call channel during tri-watch, tri-  
watch becomes dualwatch until the signal disappears.  
To transmit on the selected channel during dualwatch/tri-watch,  
push and hold [PTT].  
BUSY  
25W  
INT  
DUP  
Signal received on  
Channel 16 takes  
priority.  
TAG  
CALLING 16  
INT  
Tri-watch resumes  
after the signal  
disappears.  
25W  
TAG  
TRI  
DUP  
16  
11  
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SCAN OPERATIONS  
5
I Scan types  
Scanning is an efcient way to locate signals quickly over a  
wide frequency range. The transceiver has priority scan and  
normal scan.  
Set the tag channels (scanned channel) before scanning.  
Clear the tag channels which inconveniently stop scanning,  
such as those for digital communication use.  
Choose priority scan or normal scan in set mode in ad-  
vance. (p. 15)  
PRIORITY SCAN  
NORMAL SCAN  
CH 01  
CH 02  
CH 01  
CH 02  
CH 06  
CH 03  
CH 06  
CH 16  
CH 03  
CH 05  
CH 04  
CH 05  
CH 04  
Priority scan searches through all tag channels in se-  
quence while monitoring Channel 16. When a signal is de-  
tected on Channel 16, scan pauses until the signal disap-  
pears; when a signal is detected on a channel other than  
Channel 16, scan becomes dualwatch until the signal dis-  
appears.  
Normal scan, like priority scan, searches through all tag  
channels in sequence. However, unlike priority scan, Chan-  
nel 16 is not checked unless Channel 16 is set as a tag  
channel.  
12  
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SCAN OPERATION  
5
for 3 sec. to clear all tag channels in the channel group.  
I Setting tag channels  
For more efficient scanning, add desired channels as tag  
channels or clear tag channels that are unwanted channels.  
Channels set as non-tag channels will be skipped during  
scanning. Tag channels can be assigned to each channel  
group (International, U.S.A., Holland, DSC, ATIS) indepen-  
dently.  
I Starting a scan  
Set scan type (priority or normal scan) and scan resume timer  
in advance using set mode. (p. 15)  
q Set tag channels as described at left.  
w While pushing and holding [HI/LO], push [DIAL] one or  
more times to select the desired channel group, if desired.  
e Push [SCAN] to start priority or normal scan.  
Pri scan 16or Normal scanappears in the function display.  
When a signal is detected, scan pauses until the signal disap-  
pears or resumes after pausing 5 sec. according to set mode set-  
ting. (Channel 16 is still monitored during priority scan.)  
Rotate the channel selector to check the scanning tag channels,  
to change the scanning direction or resume the scan manually.  
16” flashes and a beep tone sounds when a signal is received  
on Channel 16 during priority scan.  
q While pushing and holding [HI/LO], push [DIAL] one or  
more times to select the desired channel group, if desired.  
w Select the desired channel to set as a tag channel.  
e Push and hold [SCAN/TAG] for 1 sec. to set the displayed  
channel as a tag channel.  
TAGappears in the function display.  
r To cancel the tag channel setting, repeat e.  
TAGdisappears.  
Clearing all tag channels in the selected channel group  
While pushing and holding [HI/LO], push and hold [DIAL]  
r To stop the scan, push [SCAN].  
Pri scanor Normal scandisappears.  
[Example]: Starting a normal scan.  
Push  
INT  
DUP  
INT  
DUP  
BUSY  
25W  
INT  
DUP  
SCAN  
25W  
25W  
TAG  
TAG  
TAG  
TAG  
INTL  
Normal scan  
Normal scan  
Scan starts.  
When a signal is received  
13  
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SET MODE  
6
I Set mode programming  
Set mode is used to change the conditions of the trans-  
ceivers functions: scan mode (normal or priority), scan re-  
sume timer, dualwatch/tri-watch selection, beep tone function  
(transceiver or HM-134), internal speaker (transceiver or HM-  
134), LCD contrast (transceiver or HM-134), scrambler code,  
scrambler type and ATIS check.  
q Turn power OFF.  
w While pushing and holding [16], turn power ON to enter set  
mode.  
e After the display appears, release [16].  
r Push [16] to select the desired item, if necessary.  
t Rotate the channel selector to select the desired condition  
of the item.  
Available functions may differ depending on dealer set-  
ting.  
y Turn power OFF, then ON again to exit set mode.  
The optional HM-134 has its own settings for the beep  
tone, internal speaker and LCD contrast.  
SET MODE CONSTRUCTION  
Scan mode  
Scan resume timer  
Dual/tri watch  
ATIS check  
Scan mode  
Scan timer  
DUAL/TRI  
ATIS check  
Beep tone  
16  
Push  
Beep  
Scrambler type  
Scrambler code  
LCD contrast  
Internal speaker  
Scrambler  
type  
Scrambler  
code  
LCD  
contrast  
Internal  
speaker  
14  
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SET MODE  
6
I Set mode items  
ï
Dual/tri watch  
ï
Scan mode  
This item sets the [DUAL] switch function as dual watch or tri-  
The transceiver has 2 scan modes: normal scan and priority  
scan. Normal scan searches all tag channels in the selected  
channel group. Priority scan searches all tag channels in se-  
quence while monitoring channel 16.  
watch.  
See the section Dual watch/Tri-watchfor details.  
Set mode  
DUAL/TRI  
Set mode  
Scan mode  
Dual watch (default)  
Tri-watch  
Priority scan (default)  
Normal scan  
ï
Scan resume timer  
ï
Beep tone  
The scan resume timer can be selected as a pause (OFF) or  
timer scan (ON). When OFF is selected, the scan pauses  
until the signal disappears. When ON is selected, the scan  
pauses 5 sec. and resumes even if a signal is being received  
on channels, except for Channel 16.  
You can select silent operation by turning beep tones OFF or  
you can have confirmation beeps sound at the push of a  
switch by turning beep* tones ON.  
Set mode  
Beep  
Set mode  
Scan timer  
Beep tone ON (default)  
Beep tone OFF  
*Beep tones setting are selectable on IC-M503 and HM-134 inde-  
pendently  
Scan timer ON (default)  
Scan timer OFF  
15  
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SET MODE  
6
ï
Internal speaker  
Set mode  
When an optional external speaker is connected, the speak-  
ers on the transceiver and microphone can be muted.  
Scrambler  
code  
Set mode  
Scrambler code 0 (UT-98 default)  
Scrambler code 127  
Internal  
speaker  
ï
Scrambler type  
Internal speaker ON (default)  
Internal speaker OFF  
When an optional scrambler unit is connected, the scrambler  
*Internal speaker setting is selectable on IC-M503 and HM-134  
independently  
unit can be selected in set mode depending on dealer setting.  
Set mode  
ï
LCD contrast  
Scrambler  
type  
This item adjusts the contrast of the LCD in 8 steps.  
Set mode  
UT-98 scrambler unit  
UT-112 scrambler unit  
LCD  
contrast  
ï
ATIS check  
LCD contrast 4 (default)  
*LCD contrast setting is adjustable on IC-M503 and HM-134 in-  
dependently  
The ATIS ID code can be checked in set mode.  
Set mode  
ATIS check  
0123456789  
ï
Scrambler code  
When an optional scrambler unit is connected, the scrambler  
code can be set depending on dealer setting.  
ATIS code  
When the UT-98 or UT-112 is installed, 128 or 32 codes (0 to  
127 or 1 to 32) can be selected, respectively.  
16  
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INTERCOM OPERATION  
7
I Intercom operation  
The optional intercom function allows you to talk to the deck  
from the cabin. The optional HM-134* REMOTE-CONTROL MI-  
CROPHONE is required for intercom operation.  
To adjust the IC-M503s speaker output level, rotate [VOL].  
To adjust the HM-134s speaker output level, push [Y]/[Z] after  
pushing [VOL].  
*DO NOT connect another remote-control microphone.  
Connect an optional HM-134 as described on p. 39.  
Transmitting is impossible during intercom operation.  
The received signal is muted during intercom operation.  
INT  
INT  
Intercom  
TALK  
q Push and holding [DIMMER] for 1 sec. to enter intercom  
IC-M503 (caller)  
HM-134 (listener)  
mode.  
The HM-134 power is automatically turned ON, even if the power  
is OFF.  
r After releasing the PTT switch you can hear the response  
through the speaker.  
t To return to normal operation, push [DIMMER] momentar-  
INT  
ily.  
INT  
Other switches also turn the function OFF, however, the corre-  
sponding function is then activated e.g. pushing [16] selects  
Channel 16.  
Intercom  
IC-M503  
HM-134  
While in the intercom mode, the transceiver functions  
(transmit and receive) are interrupted. If the transceiver is  
in transmit condition, the intercom function is not avail-  
able.  
w Push and hold [DIMMER] again to call up.  
The transceiver and microphone emit call beeps.  
e Push and hold the PTT switch and speak at a normal voice  
level into the microphone.  
TALKor LSTNappears on the caller or listener function dis-  
play, respectively.  
17  
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CONNECTIONS AND MAINTENANCE  
8
I Unpacking  
I Antenna  
The following accessories are supplied:  
Qty.  
A key element in the performance of any communication sys-  
tem is an antenna. Ask your dealer about antennas and the  
best places to mount them.  
q Mounting bracket ............................................................ 1  
w DC power cable (OPC-891) ........................................... 1  
e Microphone hanger ........................................................ 1  
r Microphone hanger cable*  
(OPC-1096 : Black) ........................................................ 1  
t Mounting bracket knobs ................................................. 2  
y Microphone hanger screws (3 × 16 mm) ......................... 2  
u Mounting screws (5 × 20 mm) ......................................... 2  
i Flat washers (M5) ........................................................... 2  
o Spring washers (M5) ...................................................... 2  
*Depending on version.  
I Fuse replacement  
Two fuses are installed in the supplied DC power cable. If a  
fuse blows or the transceiver stops functioning, track down  
the source of the problem, if possible, and replace the dam-  
aged fuse with a new, rated one.  
I Cleaning  
If the transceiver becomes dusty or dirty, wipe it clean with a  
soft, dry cloth.  
t
q
e
y
AVOID the use of solvents such as benzene or al-  
cohol, as they may damage transceiver surfaces.  
i
o
w
r
18  
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CONNECTIONS AND MAINTENANCE  
8
w EXTENSION JACK  
I Connections  
Connects to the optional DS-100 (#02) DSC CONTROLLER.  
e EXTERNAL MICROPHONE CONNECTOR  
Connects to the optional HM-134 REMOTE-CONTROL MICRO-  
PHONE.  
t
q
Intercom function is available.  
CAUTION: NEVER connect another microphone such  
as the HM-127, etc. It may cause damage to the trans-  
ceiver.  
r
e
w
r ANTENNA CONNECTOR  
Connects a marine VHF antenna with a PL-259 connector  
to the transceiver.  
CAUTION: Transmitting without an antenna may damage  
q DC POWER CONNECTOR  
the transceiver.  
Connects the supplied DC power cable from this connector  
to an external 12 V DC power source.  
t EXTERNAL SPEAKER JACK  
Connects to an external speaker. See Optionson p. 27  
for available external speakers.  
CAUTION: After connecting the DC power cable and  
external speaker jack, cover the connector and jack as  
shown below to avoid water seeping into the transceiver.  
19  
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CONNECTIONS AND MAINTENANCE  
8
I Microphone hanger  
OPC-1096  
Rest the supplied microphone on the hanger when not in use.  
Connect the OPC-1096* to the transceivers chassis and mi-  
crophone hanger to use the microphone hanger function.  
*Depending on version.  
Tighten the screw at xing torque 0.7 N m (6.9 kgm).  
If the microphone hanger function is used, Channel 16 is se-  
lected automatically when the supplied microphone is rested  
on the hanger.  
20  
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CONNECTIONS AND MAINTENANCE  
8
OVERHEAD MOUNTING  
I Mounting the transceiver  
ï
Using the supplied mounting bracket  
The universal mounting bracket supplied with your transceiver  
allows overhead or dashboard mounting.  
Mount the transceiver securely with the 2 screws supplied  
(M5 × 20) to a surface which is more than 10 mm thick and  
can support more than 5 kg.  
Mount the transceiver so that the face of the transceiver is at  
90° to your line of sight when operating it.  
CAUTION: KEEP the transceiver and microphone at  
least 1 meter away from your ships magnetic navigation  
compass.  
MOUNTING ON DASHBOARD  
NOTE: Check the installation angle; the function display  
may not be easy-to-read at some angles.  
21  
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CONNECTIONS AND MAINTENANCE  
8
r Attach the clamps on either side of the transceiver.  
Make sure that the clamps align parallel to the transceiver body.  
ï
Using the optional mounting bracket  
An optional MB-75 FLUSH MOUNT is available for mounting  
the transceiver to a at surface such as an instrument panel.  
CAUTION: KEEP the transceiver and microphone at  
least 1 meter away from your ships magnetic navigation  
compass.  
q Using the template on the last page, carefully cut a hole  
into the instrument panel (or wherever you plan to mount  
the controller).  
w Slide the transceiver through the hole as shown below.  
t Tighten the end bolts on the clamps (rotate clockwise) so  
that the clamps press firmly against the inside of the in-  
strument control panel.  
y Tighten the locking nuts (rotate counterclockwise) so that  
the transceiver is securely mounted in position as below.  
u Connect the antenna and control cable, then return the in-  
strument control panel to its original place.  
e Attach the 2 bolts supplied (M5 × 8 mm) on either side of  
the IC-M503.  
22  
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CONNECTIONS AND MAINTENANCE  
8
I Optional unit installation  
CAUTION: DISCONNECT the DC power cable from the  
transceiver before performing any work on the transceiver.  
Otherwise, there is danger of electric shock and/or equip-  
ment damage.  
w Remove the 4 screws from the shielding plate, then lift up  
the shielding plate.  
e Plug an optional unit to the MAIN unit as shown below.  
ï
Opening the transceiver case  
Follow the case opening procedure shown here when you  
want to install an optional unit, etc.  
q Remove the 6 screws as shown below and open the trans-  
ceiver.  
Optional unit  
r Return the shielding plate and assemble the units to their  
original positions.  
23  
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CONNECTIONS AND MAINTENANCE  
8
I Dimensions  
145.0 (5 2332˝)  
31.4  
53.0  
165.0 (6 12˝)  
(1 1/4˝) (2 /32˝)  
3
Unit: mm (inch)  
24  
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TROUBLESHOOTING  
9
PROBLEM  
POSSIBLE CAUSE  
SOLUTION  
REF.  
No power comes ON.  
Bad connection to the power supply.  
Check the connection to the transceiver.  
p. 19  
No sound comes from  
the speaker.  
Squelch level is too deep.  
Volume level is too low.  
Speaker has been exposed to water.  
Set squelch to the threshold point.  
Set [VOL] to a suitable level.  
Drain water from the speaker.  
p. 8  
p. 8  
Transmitting is impossi- Some channels are for low power or re-  
ble, or high power can - ceive only.  
Change channels.  
pgs.  
6, 26  
p. 8  
not be selected.  
The output power is set to low.  
Push [HI/LO] to select high power.  
Scan does not start.  
TAGchannel is not programmed.  
Set the desired channels as TAGchan-  
p. 13  
nels.  
No beep sounds.  
Beep tone is turned OFF.  
Turn the beep tone ON in SET mode.  
p. 15  
Receive signal cannot  
be understood.  
Optional voice scrambler is turned OFF.  
Scramble code is not set correctly.  
Turn the optional voice scrambler ON.  
Reset the scramble code.  
p. 10  
p. 16  
25  
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CHANNEL LIST  
10  
International channels  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
CH  
CH  
CH  
CH  
CH  
CH  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
01 156.050 160.650  
02 156.100 160.700  
03 156.150 160.750  
04 156.200 160.800  
05 156.250 160.850 15156.750 156.750  
06 156.300 156.300 16 156.800 156.800  
07 156.350 160.950 17156.850 156.850  
11 156.550 156.550  
12 156.600 156.600  
13 156.650 156.650  
14 156.700 156.700  
21 157.050 161.650  
22 157.100 161.700  
23 157.150 161.750  
24 157.200 161.800  
25 157.250 161.850  
26 157.300 161.900  
27 157.350 161.950  
28 157.400 162.000  
62 156.125 160.725  
63 156.175 160.775  
64 156.225 160.825  
65 156.275 160.875 75156.775 156.775  
66 156.325 160.925 76156.825 156.825  
72 156.625 156.625  
73 156.675 156.675  
74 156.725 156.725  
82 157.125 161.725  
83 157.175 161.775  
84 157.225 161.825  
85 157.275 161.875  
86 157.325 161.925  
87 157.375 157.375  
88 157.425 157.425  
67 156.375 156.375  
68 156.425 156.425  
69 156.475 156.475  
77 156.875 156.875  
78 156.925 161.525  
79 156.975 161.575  
80 157.025 161.625  
81 157.075 161.675  
08 156.400 156.400  
09 156.450 156.450  
10 156.500 156.500  
18 156.900 161.500  
19 156.950 161.550  
20 157.000 161.600  
60 156.025 160.625 70156.525 156.525  
61 156.075 160.675  
71 156.575 156.575  
USA channels (for U.K. version only)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
CH  
Frequency (MHz)  
CH  
Frequency (MHz)  
CH  
Frequency (MHz)  
CH  
CH  
CH  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
01A 156.050 156.050  
-- - - - - - -  
03A 156.150 156.150  
-- - - - - - -  
05A 156.250 156.250  
12 156.600 156.600 22A 157.100 157.100 64A 156.225 156.225  
13156.650 156.650 23A 157.150 157.150 65A 156.275 156.275 78A 156.925 156.925 86A 157.325 157.325  
77 156.875 156.875  
86 157.325 161.925  
14 156.700 156.700  
15156.750 156.750  
16 156.800 156.800  
24 157.200 161.800 66A 156.325 156.325 79A 156.975 156.975  
25 157.250 161.850 67156.375 156.375 80A 157.025 157.025 87A 157.375 157.375  
87 157.375 161.975  
26 157.300 161.900  
27 157.350 161.950  
68 156.425 156.425 81A 157.075 157.075  
88 157.425 162.025  
06 156.300 156.300 17156.850 156.850  
69 156.475 156.475 82A 157.125 157.125 88A 157.425 157.425  
07A 156.350 156.350 18A 156.900 156.900  
28 157.400 162.000 70156.525 156.525 83A 157.175 157.175  
71 156.575 156.575 84 157.225 161.825  
72 156.625 156.625 84A 157.225 157.225  
73 156.675 156.675 85 157.275 161.875  
74 156.725 156.725 85A 157.275 157.275  
08 156.400 156.400 19A 156.950 156.950 37A 157.850 157.850  
09 156.450 156.450 20 157.000 161.600 61A 156.075 156.075  
10 156.500 156.500 20A 157.000 157.000 -- - - - - - -  
11 156.550 156.550 21A 157.050 157.050 63A 156.175 156.175  
Low power only.  
Receive only.  
26  
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SPECIFICATIONS AND OPTIONS  
11  
I Specications  
I Options  
DS-100 (#02) DSC CONTROLLER  
GENERAL  
Frequency coverage  
Transmit  
:
When the DS-100 is installed, the transceiver conforms to  
DSC Class D for marine digital communications.  
156.000161.450 MHz  
156.000163.425 MHz  
Receive  
MB-75 FLUSH MOUNT  
For mounting the transceiver to a panel.  
Mode  
Channel spacing  
Current drain (at 13.8 V)  
: FM (16K0G3E)  
: 25 kHz  
: TX high  
6.0 A max.  
1.5 A max.  
HM-134 REMOTE-CONTROL MICROPHONE  
Max. audio  
External microphone-type controller. Provides optional inter-  
com operation. 6 m (20 feet) microphone cable and mount-  
ing base included. Black color is available.  
Power supply requirement  
Frequency stability  
Dimensions  
: 13.8 V DC (10.8 to 15.6 V)  
: 10 ppm (20°C to +60°C)  
: 165(W)×110(H)×109.4(D) mm  
(Projection not included)  
Weight  
OPC-999 MICROPHONE EXTENSION CABLE  
6 m (20 feet) microphone extension cable for optional  
HM-134. Up to 2 OPC-999 can be connected. (18 m; 60 feet  
maximum)  
: 1130 g  
TRANSMITTER  
Output power  
Modulation system  
: 25 W and 1 W  
: Variable reactance phase  
modulation  
SP-5 EXTERNAL SPEAKER (IC-M503 ONLY)  
A large, external speaker for superior audio output.  
Max. frequency deviation  
Spurious emissions  
:
5.0 kHz  
: Less than 0.25 µW  
SP-10 EXTERNAL SPEAKER (IC-M503 ONLY)  
A compact, external speaker. Features easy installation.  
RECEIVER  
Receive system  
Sensitivity (20 dB SINAD)  
Squelch sensitivity  
:
Double conversion superheterodyne  
UT-98 VOICE SCRAMBLER UNIT  
: Less than 3dBµ EMF (typical)  
: Less than 0dBµ EMF  
UT-112 VOICE SCRAMBLER UNIT  
Ensures private communications. 128 or 32 codes are  
available. Not available in some countries.  
Intermodulation rejection ratio : More than 68 dB  
Spurious response rejection ratio: More than 70 dB  
Adjacent channel selectivity : More than 70 dB  
Audio output power  
IC-M503  
:
2 W at 10% distortion with a 4 load  
2 W at 10% distortion with a 8 load  
All stated specications are subject to change without notice or  
obligation.  
HM-134  
27  
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OPTIONAL  
HM-134 REMOTE-CONTROL MICROPHONE  
12  
q POWER SWITCH [PWR] (pgs. 8, 33)  
I Panel description  
When the IC-M503 power is turned ON, push and hold for  
2 sec. to turn the HM-134 power ON or OFF.  
The optional HM-134 remotely controls the IC-M503 and pro-  
vides an optional intercom function.  
w PTT SWITCH [PTT] (pgs. 8, 33)  
Push and hold to transmit; release to receive.  
!
o
q
w
e CHANNEL UP/DOWN SWITCHES [Y]/[Z]  
Push either switch to change the operating channel, set  
mode contents, etc. (pgs. 8, 33)  
While pushing and holding [VOL], push [Y]/[Z] to adjust  
the brightness of the LCD and switch backlight. (p. 34)  
After [VOL] or [SQL] is pushed, push either switch to ad-  
just audio level or noise squelch level, respectively. (pgs.  
8, 33)  
i
MONI  
L
DIM  
SQL  
VOL  
u
y
e
r
IC  
DUAL  
DIAL  
C
In set mode, changes setting of the selected item. (pgs.  
9, 37)  
t
During scanning, checks tag channels or changes scan-  
ning direction. (pgs. 8, 36)  
r CHANNEL 16/CALL CHANNEL SWITCH [16C]  
When pushed, selects Channel 16. (pgs. 6, 32)  
When pushed and held for 1 sec., selects call channel.  
(pgs. 6, 32)  
CALLappears when call channel is selected.  
When call channel is selected, push and hold for 3 sec.  
to enter call channel programming condition. (pgs. 9, 35)  
While pushing and holding [H/L], enters memory name  
programming condition. (pgs. 9, 38)  
!
To IC-M503  
28  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
microphone key lock function is turned ON.  
Enter set mode when pushed and held while turning  
Advances the cursor while in memory name program-  
power ON. (pgs. 14, 37)  
ming condition. (pgs. 9, 38)  
t DIAL SWITCH [DIAL]  
i VOLUME/DIMMER SWITCH [VOLDIM]  
Selects and toggles the regular channels when pushed  
momentarily. (pgs. 6, 7, 32)  
While pushing and holding [H/L], push to select channel  
group. (pgs. 6, 7 and 32)  
The EURversion has International channels only and this  
function is not available.  
After pushing [VOL], [Y]/[Z] adjusts the audio level.  
Push and hold [VOLDIM] for 1 sec. to adjust the bright-  
ness of the LCD and switch backlight. (p. 34)  
Moves the cursor backward while in memory name pro-  
gramming condition. (pgs. 9, 38)  
y DUAL-WATCH/INTERCOM SWITCH [DUALIC]  
Push to start dualwatch or tri-watch. (pgs. 11, 36)  
Push and hold for 1 sec. to activate the intercom func-  
tion. (pgs. 17, 38)  
o TRANSMIT POWER SWITCH [H/L]  
When pushed, toggles high and low power. (pgs. 8, 33)  
Some channels are set to low power only.  
While pushing and holding this switch, other switches  
perform secondary functions.  
Toggles the all key lock function ON or OFF when  
pushed and held while turning power ON. (p. 34)  
•“ T” flashes while the all key lock function is in use.  
Only [PWR] and [PTT] function when the all key lock function  
is in use.  
Push to stop dualwatch or tri-watch when either is acti-  
vated.  
While pushing and holding the switch, you can call the  
IC-M503 in intercom mode. (pgs. 17, 38)  
u SQUELCH/MONITOR/LOCK SWITCH [SQLMONIL]  
After pushing [SQL], [Y]/[Z] sets the squelch threshold  
level. (p. 33)  
! SCAN SWITCH [SCANTAG] (pgs. 13, 36)  
Starts and stops normal or priority scan when tag chan-  
nels are programmed.  
Push and hold [SQLMONI] for 1 sec. to turn the monitor  
function ON. (p. 34)  
Push and hold [SCANTAG] for 1 sec. to set the dis-  
played channel as a tag (scanned) channel.  
While pushing and holding [H/L], push and hold for 3  
sec. to clear all tag channels.  
While pushing and holding [H/L], push [SQLMONIL] to  
toggle the microphone key lock function ON or OFF. (p.  
34)  
•“ Tappears while key lock function is in use.  
[PWR], [PTT], [VOL], [SQL] and [H/L] still function when the  
29  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
! EXTERNAL SPEAKER JACK  
I Function display  
Connect the external speaker (an 8 load). The internal  
speaker can be deactivated via the Set mode program-  
ming. (p. 37)  
!
!
!!!  
!
!
The speaker output employs a BTL (Balanced Trans-  
Less) circuit, NEVER connect the speaker cable to  
ground (or chassis). Use a oating setup.  
TX BUSY TAG CALL LOW  
WAIT  
USA  
INT  
L
DUP DUAL  
P SCAN TRI  
q
w
!
CAUTION: After connecting the external speaker jack,  
cover the jack with water resistant tape as shown below to  
avoid water seeping into the microphone.  
Binding the mic-cable and external-speaker jack connec-  
tion mold with water resistant tape increases the water-  
proong of the connection mold.  
o
i
e
r
t
VOL  
SQL  
SCRM  
u
y
External SP jack  
q CHANNEL GROUP INDICATOR (pgs. 6, 32)  
Indicates whether an International (INT) or U.S.A. (USA)  
channel is selected.  
w KEY LOCK INDICATOR (p. 34)  
Appears while the key lock function is in use.  
Flashes while the all key lock function is in use.  
e CHANNEL NUMBER READOUT  
Indicates the selected operating channel number. A”  
appears when a simplex channel is selected. (pgs. 6,  
32)  
Connection mold  
30  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
In set mode, indicates the selected condition. (pgs. 14,  
Appears when low power is selected.  
37)  
! CALL CHANNEL INDICATOR (pgs. 6, 32)  
r VOLUME INDICATOR (p. 33)  
Appears when the call channel is selected.  
Appears while audio output level is adjusted.  
! DUPLEX INDICATOR (pgs. 6, 32)  
t SQUELCH INDICATOR (p. 33)  
Appears when a duplex channel is selected.  
Appears while noise squelch level is adjusted.  
! TAG CHANNEL INDICATOR (pgs. 13, 36)  
y CHANNEL NAME INDICATOR  
Channel comment appears (and scrolls) if programmed.  
(pgs. 9, 38)  
Appears when a tag channel is selected.  
! BUSY INDICATOR (pgs. 8, 33, 34)  
Appears when receiving a signal or when the squelch  
opens.  
In set mode, indicates or scrolls the selected set mode  
item. (pgs. 14, 37)  
! TRANSMIT INDICATOR (pgs. 8, 33)  
u SCRAMBLER INDICATOR (pgs. 10, 35)  
Appears while transmitting.  
Appears when an optional voice scrambler is activated.  
! WAITINDICATOR  
i SCAN INDICATOR (pgs. 13, 36)  
SCANappears during normal scan.  
P SCANappears during priority scan.  
WAITappears in the HM-134 display while transmitting  
via the IC-M503s attached microphone.  
In the above case, the connected HM-134 does not have prior-  
ity.  
o PRIORITY CHANNEL INDICATOR  
Indicates a priority channel during priority scan or  
dual/tri-watch. (pgs. 12, 36)  
ICappears during intercom mode. (pgs. 17, 38)  
! DUAL/TRI WATCH INDICATOR (pgs. 11, 36)  
DUALappears during dualwatch;TRIduring tri-watch.  
! LOW POWER INDICATOR (pgs. 8, 33)  
31  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
I Channel selection  
ï
ï
Channel 16  
U.S.A. and International channels  
q Push [16C] to select Channel  
q Push [DIAL] to select regular channel.  
w While pushing and holding [H/L], push [DIAL] to select  
channel group.  
16.  
w Push [DIAL] to return to the con-  
dition before selecting Channel  
16, or push [Y] or [Z] to select  
operating channel.  
U.S.A. or International can be selected in sequence.  
Output power turns to 25Wauto-  
matically, whenever Channel 16 is  
selected.  
ï
Call channel  
U.S.A. channels  
q Push and hold [16C] for 1 sec.  
to select call channel.  
then push DIAL  
Push and hold  
w Push [DIAL] to return to the con-  
dition before selecting call chan-  
nel, or push [Y] or [Z] to select  
operating channel.  
International channels  
32  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
I Receiving and transmitting  
q Push [PWR] to turn power ON.  
w Push [VOL], then [Y]/[Z] to adjust audio output level.  
Push [SQL], then [Y]/[Z] to mute any audio noise, if necessary.  
e Push [Y]/[Z] to select the desired channel.  
t Push and hold [PTT] to transmit, then speak into the mi-  
crophone.  
•“ ” appears.  
Channel 70 cannot be used for transmission (for GMDSS use).  
When receiving a signal, “  
from the speaker.  
appears and audio is emitted  
y Release [PTT] to receive.  
IMPORTANT: To maximize the readability of your trans-  
mitted signal (voice), pause a few sec. after pushing [PTT],  
hold the microphone 10 to 15 cm (4 to 6 inches) from your  
mouth and speak at a normal voice level.  
Further adjustment of audio level may be necessary at this point.  
Use the optional voice scrambler function for privacy. (pgs. 10,  
35)  
r Push [H/L] to select the output power, if necessary.  
LOWappears when low power is selected.  
Choose low power for shorter, high power for longer distance  
communications.  
Some channels are low power only.  
r Set output power  
q Turn power ON  
t Push to  
w Set volume  
transmit  
y Release  
to receive  
w Set squelch,  
if required  
e Set channel  
t Speak into  
microphone  
33  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
I Lock functions  
I Display backlighting  
The lock function electronically locks keys and switches to  
prevent accidental changes and function access from the mi-  
crophone.  
The function display and switches can be backlit for better  
visibility under low light conditions. And the backlighting con-  
dition can be adjusted independently from the transceiver.  
All keys, switches and controllers on the transceiver are functional.  
q Push and hold [VOLDIM] for 1 sec. to enter backlight ad-  
justing mode.  
ï
Activating the lock  
function  
•“  
with number of backlight level appears in the channel name  
indicator.  
While pushing and holding  
[H/L], push [SQL] to turn the  
lock function ON and OFF.  
•“ ” appears.  
w Push [Y]/[Z] to adjust the backlight level.  
The backlight level is adjustable between 0 (lights OFF) and 3  
(brightest).  
Only [PWR], [PTT], [H/L],  
[SQLMONI], [VOL]+[Y]/[Z] and  
[SQL]+[Y]/[Z] are functional.  
Appears when the lock  
function is in use.  
I Monitor function  
The monitor function releases the noise squelch mute of the  
microphone only. (An independent noise squelch system is  
employed.)  
Push and hold [SQLMONI] for 1 sec. to activate the mon-  
itor function.  
ï
Activating the all key  
lock function  
While pushing and holding  
[H/L], turn the power ON by  
pushing [PWR] to turn the all  
key lock function ON and OFF.  
•“ ” ashes.  
•“  
” flashes and audio is emitted.  
Any key, except [Y]/[Z], cancels the monitor function.  
Flashes when the all lock  
function is in use.  
Only [PWR] and [PTT] are func-  
tional.  
34  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
I Call channel programming  
q While pushing and holding [H/L],  
push [DIAL] several times to select  
the desired channel group (USA or  
INT) to be programmed.  
I Optional voice scrambler  
operation  
ï
Activating the scrambler  
q Select an operating channel, other than Channel 16.  
w While pushing and holding  
[H/L], push [DUAL] to turn  
the voice scrambler function  
ON.  
w Push and hold [16C] for 1 sec. to  
select the call channel of the se-  
lected channel group.  
SCRMappears.  
CALLand call channel number ap-  
pear.  
e To turn the scrambler func-  
tion OFF, repeat step w.  
Appears when the voice  
scrambler function is in use.  
SCRMdisappears.  
e Push and hold [16C] again for  
3 sec. (until long beep changes to  
2 short beeps) to enter call channel  
programming condition.  
Call channel number and channel  
group to be programmed ashes.  
r Push [Y]/[Z] to select the desired  
channel.  
ï
Programming scramble codes  
There are 128 codes (00 to 127) available with UT-98 or 32  
codes (01 to 32) available with the UT-112 for programming.  
In order to understand one another, all transceivers in your  
group must have the same scrambler code, as well as the  
same scrambler unit. The scrambler code is programmed in  
set mode. See pgs. 10, 16, 37 for details.  
t Push [16C] to program the dis-  
played channel as the call channel.  
The call channel number and channel  
group stop ashing.  
35  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
I Starting a scan  
q While pushing and holding [H/L],  
push [DIAL] several times to select  
the channel group (USA or INT), if  
desired.  
I Setting tag  
I Dualwatch/Tri-  
watch operation  
q Push [Y]/[Z] to select the desired  
channels  
q While pushing and holding [H/L],  
push [DIAL] several times to select  
the channel group (USA and INT), if  
desired.  
w Push [Y]/[Z] to select the desired  
channel to set as a tag channel.  
e Push and hold [SCANTAG] for  
1 sec. to set the displayed channel  
as a tag channel.  
channel.  
While pushing and holding [H/L], push  
[DIAL] several times to select the chan-  
nel group (USA, INT), if desired.  
w Push [DUAL] to start dualwatch or  
tri-watch.  
w Push [SCAN] to start priority or nor-  
mal scan.  
SCANappears during normal scan.  
The priority channel readout indicates  
16, and Pand SCANindicators ap-  
pear during priority scan.  
When a signal is received, scan pauses  
until the signal disappears or resumes  
after pausing 5 sec. according to set  
mode setting (Channel 16 is still moni-  
tored during priority scan).  
DUALappears during dualwatch; TRI”  
appears during tri-watch.  
Beep tone sounds when a signal is re-  
ceived on Channel 16.  
•“  
appears.  
r To cancel the tag channel setting,  
push and hold [SCANTAG] for  
1 sec.  
Tri-watch becomes dualwatch when re-  
ceiving a signal on the call channel.  
e To cancel dualwatch/tri-watch, push  
[DIAL] again.  
•“  
disappears.  
Push [Y]/[Z] to check the scanning tag  
channels, to change the scanning direc-  
tion or resume the scan manually.  
e To stop the scan, push [SCAN].  
SCANdisappears.  
Clearing all tag channels in the  
selected channel group  
While pushing and holding [H/L],  
push [SCANTAG] for 3 sec. to clear-  
ing all tag channels. (until long beep  
changes to 2 short beeps)  
Pushing [PTT], [16C] or [DIAL] also  
stops the scan.  
36  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
Beep tone BEEP”  
Push [Y] to turn ON, [Z] to turn OFF the beep output.  
I Set mode programming  
Set mode is used to change the condition of the transceivers  
functions and the microphones own functions:  
Push  
Transceivers functions—  
Scan mode (normal or priority), scan resume timer, dual-  
watch/tri-watch selection, beep tone function, internal  
speaker, LCD contrast, scrambler code, scrambler type and  
ATIS check.  
Microphones own functions—  
Beep tone function, LCD contrast and internal speaker.  
LCD contrast LCD CONTRAST”  
Push [Y]/[Z] to adjust to a suitable LCD contrast.  
In this section, instructions are for the microphones own func-  
tions only. Refer to pgs. 1416 for the setting of the other  
functions. (Some functions may not be selectable from the mi-  
crophone.)  
• •  
Push  
• •  
ï
Entering set mode  
Internal speaker INT-SPEAKER”  
Push [Y]/[Z] to turn the HM-134 internal-speaker ON/OFF.  
q Turn power OFF.  
w While pushing and holding [16C], turn power ON.  
After beep emission, a set mode item (in the channel name indi-  
cator and condition in the channel number readout) is displayed.  
e Push [16C] to select the desired item, if necessary.  
r Push [Y]/[Z] to select the desired condition of the item.  
t Turn power OFF, then ON to exit set mode.  
Push  
37  
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HM-134 REMOTE-CONTROL MICROPHONE  
12  
I Intercom operation  
I Channel names  
q Push and hold [DUAL] for 1 sec.  
to activate the intercom function.  
ICappears in the priority channel  
readout.  
q Push [Y]/[Z] to select a channel to program.  
While pushing and holding [H/L], push [DIAL] several times to  
select the channel group (USA and INT), if desired.  
w While pushing and holding [H/L], push [16C].  
The 1st character of the currently programmed comment ashes.  
e Push [Y]/[Z] to select a character.  
The channel name disappears.  
w Push [PTT] to talk.  
Appears when the inter-  
com function is in use.  
•“  
appears in the channel  
r Push [SQL] to move to right; then push [Y]/[Z] to select a  
character.  
name indicator.  
e Release [PTT] to listen.  
Push [VOL] to move to the left.  
•“  
appears in the channel name indicator when the trans-  
t Continue until the desired characters have been selected,  
then push [16C] to return to normal operation.  
ceiver is in talking mode.  
r Push [DUAL] to cancel the intercom function.  
Pushing [16], [SCANTAG] or [DIAL] is also cancels the intercom  
function.  
Available characters  
(space)  
()  
(4)  
(!)  
(+)  
(5)  
(F)  
(P)  
(Z)  
(j)  
(")  
(#)  
()  
(7)  
(H)  
(R)  
(b)  
(l)  
($)  
(.)  
(
%
)
(&)  
(0)  
(A)  
(K)  
(U)  
(e)  
(o)  
(y)  
()  
(1)  
(B)  
(L)  
(V)  
(f)  
(()  
(2)  
(C)  
(M)  
())  
(3)  
(D)  
(N)  
(X)  
(h)  
(r)  
For your reference:  
(,)  
(/)  
In case the intercom mode is selected with the transceiver  
during microphone power OFF, the microphone power is au-  
tomatically turned ON and the intercom mode is selected.  
(6)  
(G)  
(Q)  
(a)  
(k)  
(u)  
(8)  
(I)  
(9)  
(J)  
(T)  
(d)  
(n)  
(x)  
(E)  
(O)  
(Y)  
(i)  
(S)  
(c)  
(m)  
(w)  
(W)  
(g)  
(q)  
ï
Intercom beep function  
Push and hold [DIAL] for more than 1 sec.  
Emits intercom beep while holding.  
(p)  
(z)  
(s)  
(t)  
(v)  
38  
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HM-134 CONNECTIONS AND INSTALLATION  
13  
I HM-134 supplied accessories  
I Installation  
Accessories included with the HM-134:  
Qty.  
The optional HM-134 can be connected to the transceiver di-  
rectly, as well as via the supplied connection cable for longer  
distance remote operation. The connector of the connection  
cable can be installed into a cabinet, wall, etc., as a built-in  
plug.  
q Connection cable (OPC-1000: 6 m; 20 ft) ...................... 1  
w Mounting base ................................................................ 1  
e Microphone hanger ........................................................ 1  
r Screws (M3 × 16; tapping) ............................................. 5  
For longer distance remote operation, the optional extension  
cable, OPC-999 (6 m; 20 ft/Connecting between transceiver  
and the connection cable.), is available, and up to 2 OPC-999  
can be added.  
q Insert the supplied cable into the external microphone jack  
and tighten the cable nut as shown below.  
w
e
r
q
39  
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HM-134 CONNECTIONS AND INSTALLATION  
13  
w To use the supplied cable as a wall socket, see the follow-  
ing steps.  
y The installation is completed.  
e Using the mounting base, carefully mark off the 2 spots  
where the cable and screws will be fastened.  
r Drill holes at these marks.  
t Install the mounting base using screws as shown below.  
Mounting base  
Nut  
Gasket  
Screw holes  
(approx. 2 (d) mm; 332)  
Cap  
40  
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HM-134 CONNECTIONS AND INSTALLATION  
13  
Mounting base  
5 mm; 316˝  
2 mm; 332˝ x 3  
2 mm; 332˝  
Nut  
Gasket  
Cap  
24 to 27 (d) mm  
(1516 to 1116˝)  
41  
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MB-75 TEMPLATE  
149 (578˝)  
MB-75  
4R11  
2 mm; 332˝  
HM-134  
24 to 27 (d) mm  
(1516 to 1116˝)  
Unit: mm (inch)  
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INSTALLATION NOTES  
I Installation notes  
In all cases any possible risk depends on the transmitter  
being activated for long periods. (actual recommendation lim-  
its are specified as an average of 6 minutes) Normally the  
transmitter is not active for long periods of time. Some radio li-  
censes will require that a timer circuit automatically cuts the  
transmitter after 12 minutes etc.  
The installation of this equipment should be made in such a  
manner as to respect the EC recommended electromagnetic  
eld exposure limits (1999/519/EC).  
The maximum RF power available from this device is 25  
watts. The antenna should be installed as high as possible  
for maximum efciency and that this installation height should  
be at least 5 meters above ground (or accessible) level. In the  
case where an antenna cannot be installed at a reasonable  
height, then the transmitter should neither be continuously op-  
erated for long periods if any person is within 5 meters of the  
antenna, nor operated at all if any person is touching the an-  
tenna.  
Similarly some types of transmitter, SSB, CW, AM, etc. have a  
lower averageoutput power and the perceived risk is even  
lower.  
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DECLARATION  
OF CONFORMITY  
We Icom Inc. Japan  
1-1-32 Kamiminami, Hirano-ku,  
Osaka 547-0003 Japan  
0560  
Declare on our sole responsibility that this equipment complies with the  
essential requirements of the Radio and Telecommunications Terminal  
Equipment Directive, 1999/5/EC, and that any applicable Essential Test  
Suite measurements have been performed.  
Düsseldorf 25th Sept. 2001  
Place and date of issue  
Kind of equipment: VHF MARINE TRANSCEIVER  
Icom (Europe) GmbH  
Himmelgeister straße 100  
D-40225 Düsseldorf  
Type-designation: iC-m503  
Version (where applicable):  
Authorized representative name  
This compliance is based on conformity with the following harmonised  
standards, specifications or documents:  
T. Maebayashi  
General Manager  
i)  
EN 301 025-1  
V1.1.2 (2000-08)  
V1.1.1 (2000-08)  
V1.1.1 (2001-05)  
V1.1.2 (2000-12)  
V1.1.1 (2001-05)  
1997  
ii) EN 301 025-2  
iii) EN 301 025-3  
iv) EN 300 162-2  
v) EN 300 162-3  
vi) EN 60945  
Signature  
vii) EN 60950  
1992  
viii) EN 300 698-2  
V1.1.1 ( 2000-8)  
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Count on us!  
< Intended Country of Use >  
GER  
AUT  
GBR  
IRL  
FRA  
NED  
BEL  
LUX  
ESP  
POR  
ITA  
SWE  
DEN  
FIN  
GRE  
SUI  
A-6097D-1EU-q  
Printed in Japan  
© 2001 Icom Inc.  
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan  
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CHANNEL LIST  
10  
International channels  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
CH  
CH  
CH  
CH  
CH  
CH  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
01 156.050 160.650  
02 156.100 160.700  
03 156.150 160.750  
04 156.200 160.800  
05 156.250 160.850 15156.750 156.750  
06 156.300 156.300 16 156.800 156.800  
07 156.350 160.950 17156.850 156.850  
11 156.550 156.550  
12 156.600 156.600  
13 156.650 156.650  
14 156.700 156.700  
21 157.050 161.650  
22 157.100 161.700  
23 157.150 161.750  
24 157.200 161.800  
25 157.250 161.850  
26 157.300 161.900  
27 157.350 161.950  
28 157.400 162.000  
62 156.125 160.725  
63 156.175 160.775  
64 156.225 160.825  
65 156.275 160.875 75156.775 156.775  
66 156.325 160.925 76156.825 156.825  
72 156.625 156.625  
73 156.675 156.675  
74 156.725 156.725  
82 157.125 161.725  
83 157.175 161.775  
84 157.225 161.825  
85 157.275 161.875  
86 157.325 161.925  
87 157.375 157.375  
88 157.425 157.425  
67 156.375 156.375  
68 156.425 156.425  
69 156.475 156.475  
77 156.875 156.875  
78 156.925 161.525  
79 156.975 161.575  
80 157.025 161.625  
81 157.075 161.675  
08 156.400 156.400  
09 156.450 156.450  
10 156.500 156.500  
18 156.900 161.500  
19 156.950 161.550  
20 157.000 161.600  
60 156.025 160.625 70156.525 156.525  
61 156.075 160.675  
71 156.575 156.575  
USA channels (for U.K. version only)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
CH  
Frequency (MHz)  
CH  
Frequency (MHz)  
CH  
Frequency (MHz)  
CH  
CH  
CH  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
01A 156.050 156.050  
-- - - - - - -  
03A 156.150 156.150  
-- - - - - - -  
05A 156.250 156.250  
12 156.600 156.600 22A 157.100 157.100 64A 156.225 156.225  
13156.650 156.650 23A 157.150 157.150 65A 156.275 156.275 78A 156.925 156.925 86A 157.325 157.325  
77 156.875 156.875  
86 157.325 161.925  
14 156.700 156.700  
15156.750 156.750  
16 156.800 156.800  
24 157.200 161.800 66A 156.325 156.325 79A 156.975 156.975  
25 157.250 161.850 67156.375 156.375 80A 157.025 157.025 87A 157.375 157.375  
87 157.375 161.975  
26 157.300 161.900  
27 157.350 161.950  
68 156.425 156.425 81A 157.075 157.075  
88 157.425 162.025  
06 156.300 156.300 17156.850 156.850  
69 156.475 156.475 82A 157.125 157.125 88A 157.425 157.425  
07A 156.350 156.350 18A 156.900 156.900  
28 157.400 162.000 70156.525 156.525 83A 157.175 157.175  
71 156.575 156.575 84 157.225 161.825  
72 156.625 156.625 84A 157.225 157.225  
73 156.675 156.675 85 157.275 161.875  
74 156.725 156.725 85A 157.275 157.275  
08 156.400 156.400 19A 156.950 156.950 37A 157.850 157.850  
09 156.450 156.450 20 157.000 161.600 61A 156.075 156.075  
10 156.500 156.500 20A 157.000 157.000 -- - - - - - -  
11 156.550 156.550 21A 157.050 157.050 63A 156.175 156.175  
Low power only.  
Receive only.  
AA  
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