VHF MARINE TRANSCEIVER

v The above DS-100 is an optional DSC Controller
The smartest way to use a second station with the IC-M503.COMMANDMIC
46 inch body for simple operation
The IC-M503 has a 46 inch front panel that will easily blend into your cabin console or dashboard. The generous front panel provides large function switches and a wide LCD. With full dot-matrix characters, information can be easily read under any lighting condition.
Optional COMMANDMIC; HM-134B
The COMMANDMIC (HM-134B) is really handy as a 2nd station for the IC-M503 to operate all functions (except DSC operation) from remote locations, such as from the deck or ybridge. With slim dimensions and the sizable LCD, the COMMANDMIC fits in your palm comfortably. The powerful AF amplier provides a reliable 2.0W of output power that is similar to a xed mount radio. Whats more, you can talk with the IC-M503 as an intercom.
Water resistant construction
The IC-M503, DS-100 and COMMANDMIC have water resistant construction*. You can install the unit into the most convenient place, without worrying about watersplash.
v Optional COMMANDMICTM, HM-134B
* Equivalent to JIS waterproof specication grade 7 or IPX7 of the corresponding international standard IEC 529 (1989) (1m depth for 30 minutes; except cables).
Optional Class-D DSC controller DS-100
The DS-100 has a 168-character full dot-matrix display that is very easy to see. Large, clearly labeled controls allow you to easily make routine individual, group and all ships calls. Up to 40 received messages (20 distress and 20 other calls) are stored, and a total 70 address IDs (Individual and Group ID) can be programmed. When connected to the GPS receiver (NMEA0183 Ver.2.0), position data and universal/local times can be displayed.

And more.

Backlighting for LCD and keypad are adjustable to 8 levels One touch access to Ch 16 or call channel Supplied Speaker-mic for clear transmission and remote functions Optional UT-98 or UT-112 provides private communication*
(*Not available in some countries due to local regulations)
ATIS standard for Dutch and German versions Up to 22 free programmable channels*
(*Ask your dealer for details)

SPECIFICATIONS

GENERAL
Frequency range* : Tx 156.000161.450MHz Rx 156.000163.425MHz : 16K0G3E (FM) : All International and USA* channels
*availability depending on version * Frequency range that may be subject to licensing conditions.

145mm 109.4mm

SYSTEM OVERVIEW

DS-100

(option)
COMMANDMIC; HM-134 IC-M503
Type of emission Usable channels
Power supply : 13.8V DC (10.8V15.6V) Current drain (at 13.8V DC) Transmit : 6.0A (at 25W output) Receive : 1.5A (at AF max.) Operating temp. range : 20C to +60C Antenna connector : SO-239 (50) Dimensions : 165(W)110(H)109.4(D)mm

(proj. not included)

NMEA0183 (Ver. 2.0) input GPS Power Supply
21m max. External Speaker External Speaker

31.4mm 53mm

RECEIVER
Intermediate freq. Sensitivity : 1st 21.7MHz 2nd 450kHz : Less than 3dB emf
at 20dB SINAD Supplied accessories: Hand microphone Mounting bracket kit DC power cable Mic. hanger

Weight (approx.)

: 1.13kg

TRANSMITTER

Output power : 25W or 1W (at 13.8V DC) Modulation system : Variable reactance freq. mod. Max. Freq. deviation: 5kHz Spurious emissions : Less than 0.25W Residual modulation: More than 40dB Adjacent Ch. power : More than 70dB Squelch sensitivity Adj. Ch. selectivity Spurious response Intermod. rejection Audio output power
: Less than 0dB emf : More than 70dB : More than 70dB : More than 68dB : 2.0W at 10% distortion with a 4
Measurements made in accordance with EN 301 025. All stated specications are subject to change without notice or obligation.

OPTIONS

DS-100 DSC CONTROLLER (Ver. 02) Receive frequency : 156.525MHz (Ch 70) Mode : 16K0G2B Operating temp. range : 20C to +60C Antenna connector : SO-239 (50) Dimensions (proj. not incl.): 165(W)110(H)84.4(D)mm Weight (approx.) : 1.0kg Sensitivity : 1V Adjacent Ch. selectivity : 70dB Spurious response : 70dB Intermod. rejection ratio : 68dB GPS interface : NMEA0183 ver. 2.0 HM-134B REMOTE-CONTROL MICROPHONE Up to 21m of freedom from the IC-M503 with two OPC-999, extension cables. Allows you to control all functions of the IC-M503 (except DSC operation). When connected to an external speaker, provides 2.0W of audio output power with an 8 load. Dimension (proj. not incl.) : 63.5(W)125.0(H)31.4(D)mm Weight : 265g Supplied accessories : Mounting base for cable connector OPC-1000 (6m cable) Mic. hanger OPC-999 EXTENSION CABLE FOR HM-134B 6m of extension cable for use with COMMANDMICTM. MB-75 FLUSH MOUNT KIT For ush-mounting the IC-M503 or DS-100 to a at surface such as a control panel. UT-98 VOICE SCRAMBLER UNIT Enables private communication by scrambling your voice signal. Up to 128 scrambling codes are available. Not available in some countries. Scrambling system is not compatible with the UT-112. UT-112 VOICE SCRAMBLER UNIT Enables private communication by scrambling your voice signal. Up to 32 scrambling codes are available. Not available in some countries. Scrambling system is not compatible with the UT-98. EXTERNAL SPEAKERS (for use with IC-M503) SP-5: A large speaker for superior audio output. SP-10: A compact speaker, for limited space.
COMMANDMIC is a trademark of Icom Inc.

HM-134B

1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan

Phone: 5302

Fax: 0013
URL: http://www.icom.co.jp/world/index.html

Count on us!

Icom America Inc.
< Corporate Headquarters >
2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A. Phone : (425) 454-8155 Fax : (425) 454-1509 URL : http://www.icomamerica.com < Customer Service > Phone : (425) 454-7619

Icom (Europe) GmbH

Communication Equipment Himmelgeister Str. 100, D-40225 Dsseldorf, Germany Phone : Fax : URL : http://www.icomeurope.com

Asia Icom Inc.

6F No. 68, Sec. 1 Cheng-Teh Road, Taipei, Taiwan, R.O.C. Phone : (02) Fax : (02) URL : http://www.asia-icom.com
Your local distributor/dealer:

Icom Canada

Glenwood Centre #150-6165 Highway 17, Delta, B.C., V4K 5B8, Canada Phone : (604) 952-4266 Fax : (604) 952-0090 URL : http://www.icomcanada.com

Icom Spain S.L.

Crta. de Gracia a Manresa Km. 14,Sant Cugat del Valles Barcelona, SPAIN Phone : (93) 70 Fax : (93) 46 URL : http://www.icomspain.com

Beijing Icom Ltd.

1305, Wanshang Plaza, Shijingshan Road, Beijing, China Phone : (010) Fax : (010) 6866 3553
Icom (Australia) Pty. Ltd.
A.B.N. 290-294 Albert Street, Brunswick, Victoria, 3056, Australia Phone : 0666 Fax : 0022 URL : http://www.icom.net.au

Icom (UK) Ltd.

Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone : Fax : URL : http://www.icomuk.co.uk

Icom New Zealand

146A Harris Road, East Tamaki, Auckland, New Zealand Phone : 4062 Fax : 4708 URL : http://www.icom.co.nz

Icom France S.a

Zac de la Plaine, Rue Brindejonc des Moulinais BP 5804, 31505 Toulouse Cedex, France Phone : Fax : URL : http://www.icom-france.com
Certificate Number Q14190
Icom Inc. (Japan), is an ISO9001 certification acquired company.

00DOIcom Inc.

Printed in Japan

(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 ships identication for radio purposes. 1
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PANEL DESCRIPTION

I Panel description

VHF MARINE

Function display Speaker

WATER RESISTANT

POWER VOL

DIMMER

q POWER SWITCH [POWER] Push to toggle the transceiver power ON and OFF. w VOLUME CONTROL [VOL] Adjusts the audio level. (p. 8) e SQUELCH CONTROL [SQL] Sets the squelch threshold level. (p. 8) 2
r TRANSMIT POWER SWITCH [HI/LO] Push to Toggle high and low power. (p. 8)
Some channels are set to low power only.
While pushing and holding this switch, other switches perform secondary functions.
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t CHANNEL SELECTOR [CHANNEL] Rotate [CHANNEL] to select the operating channels, set mode contents, etc. (p. 8) 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. u CALL CHANNEL SWITCH [CALL] Push to select the call channel. (p. 6) Push and hold for 3 sec. to enter call channel programming 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 channel group. (pgs. 6, 7) The EUR version has International channels only and this
function is not available.
!0 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 displayed channel as a tag (scanned) channel. While pushing and holding [HI/LO], push and hold for 3 sec. to clear all tag channels. !1 DUALWATCH/TRI-WATCH SWITCH [DUAL] (p. 11) Push to start dualwatch or tri-watch. When dualwatch/tri-watch is activated, push to stop them.
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to approx. 10 V DC or below. DUAL appears during dualwatch; TRI appears during tri-watch. (p. 11) WAIT appears in the IC-M503 display while transmitting via the HM-134 remote-control microphone.
In the above case, the connected HM-134 has priority.

I Function display

o q w e r i
BUSY INT 25W CALL TAG SC DUP CALLING
LSTN appears in the IC-M503 display when pushing the PTT switch on the HM-134, while the intercom function is activated. t SCRAMBLER INDICATOR (p. 10) Appears when the optional voice scrambler is activated. y DUPLEX INDICATOR Appears when a duplex channel is selected. u CHANNEL NUMBER READOUT 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) i CHANNEL GROUP INDICATOR (p. 6) Indicates whether an International, U.S.A., Holland, DSC or ATIS channel is selected.

Available channel groups depend on version.
q BUSY/TRANSMIT INDICATOR (p. 8) BUSY appears when receiving a signal or when the squelch opens. TX appears while transmitting. w POWER INDICATOR (p. 8) 25W appears when high power is selected. 1W appears when low power is selected. e TAG CHANNEL INDICATOR (p. 13) Appears when a tag channel is selected. r CHANNEL NAME INDICATOR Channel comment appears if programmed. (p. 9) Low Battery appears when the battery voltage drops 4
o CALL CHANNEL INDICATOR (pgs. 6, 9) Appears when a call channel is selected.
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I Microphone

Speaker

Microphone

q PTT SWITCH [PTT] Push and hold to transmit; release to receive. (p. 8) Y Z w CHANNEL UP/DOWN SWITCHES [Y]/[Z] Push either switch to change the operating memory channel, 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

Push [CALL] to select the call channel of the selected channel group.
CALL and call channel number appear.

I Channel selection

Channel 16
Channel 16 is the distress and safety channel. It is used for establishing initial contact with another station and for emergency communications. Channel 16 is monitored during both dualwatch and tri-watch. While standing by, you must monitor Channel 16. Push [16] to select Channel 16.
Output power turns to 25W automatically, 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.
Push [DIAL] to return to the condition before selecting call channel, or rotate [CHANNEL] to select operating channel. INT 25W CALL TAG CALLING

International channels

There are 57 International channels for the IC-M503. 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 appears when International channels are selected.
Push [DIAL] to return to the condition before selecting Channel 16, or rotate [CHANNEL] to select operating channel.

Output power returns to the previous output power automatically.

INT Push

25W TAG CALLING
e Rotate the channel selector to select a channel.
DUP appears for duplex channels.

Call channel

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.

25W TAG INTL

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BASIC OPERATION U.S.A. channels (U.K. version only) For the U.K. versions, there are 58 U.S.A. channels 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.
International and U.S.A. channels can be selected in sequence.

HOLLAND 1W DUP INTL

Channels are memorized separately for each channel group.
ATIS and DSC channels (FRG version only) For the FRG versions, there are 57 ATIS and 57 DSC channels in addition to 57 International channels.
International, ATIS and DSC channels can be selected in sequence.

USA 25W TAG CCG

Holland channels (Holland version only)
For Holland versions, there are 59 Holland channels 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.
International and Holland channels can be selected in sequence.

ATIS 25W TAG INTL DUP

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y Push and hold [PTT] to transmit, then speak into the microphone.
TX appears. Channel 70 cannot be used for transmission (for GMDSS use).
I Receiving and transmitting
CAUTION: Transmitting without an antenna may damage the transceiver. q Push [POWER] to turn power ON. w Set the audio and squelch levels. 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.
u Release [PTT] to receive. IMPORTANT: To maximize the readability of your transmitted 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.
r Rotate the channel selector or push [Y]/[Z] on the microphone to select the desired channel.
When receiving a signal, BUSY appears and audio is emitted from the speaker. 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.
25W or 1W appears when high or low power is selected, respectively. Choose low power to conserve power, choose high power for longer distance communications. Some channels are for low power only.

Setmode Beep

Setmode Scrambler code

Enter set mode

Push one or more times.

Select code

Set mode

Scrambler code item

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DUALWATCH/TRI-WATCH

I Description
Dualwatch monitors Channel 16 while you are receiving another channel; tri-watch monitors Channel 16 and the call channel while receiving another channel.

I Operation

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.
DUAL appears during dualwatch; TRI appears during triwatch. 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 Call channel
r To cancel dualwatch/tri-watch, push [DUAL] again. [Example]: Operating tri-watch on INT Channel 25.

INT 25W TAG TRI DUP 16

Tri-watch starts.

Dualwatch

Tri-watch
BUSY INT 25W CALL TAG CALLING 16 BUSY 25W TAG CALLING INT DUP 16 INT 25W TAG TRI DUP 16
Signal is received on call channel.
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, triwatch becomes dualwatch until the signal disappears. To transmit on the selected channel during dualwatch/tri-watch, push and hold [PTT].
Signal received on Channel 16 takes priority. Tri-watch resumes after the signal disappears.
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SCAN OPERATIONS

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 advance. (p. 15) PRIORITY SCAN

BUSY INT 25W TAG DUP Normalscan

Scan starts.

When a signal is received 13
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SET MODE

I Set mode programming
Set mode is used to change the conditions of the transceivers functions: scan mode (normal or priority), scan resume timer, dualwatch/tri-watch selection, beep tone function (transceiver or HM-134), internal speaker (transceiver or HM134), LCD contrast (transceiver or HM-134), scrambler code, scrambler type and ATIS check. Available functions may differ depending on dealer setting. The optional HM-134 has its own settings for the beep tone, internal speaker and LCD contrast. 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. y Turn power OFF, then ON again to exit set mode.

SET MODE CONSTRUCTION

ATIS check Scan mode Scan resume timer Dual/tri watch

ATIS check

Scan mode

Scan timer

DUAL/TRI

Beep tone

LCD contrast Internal speaker

Scrambler type

Scrambler code

LCD contrast

Internal speaker
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I Set mode items

Scan mode
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 sequence while monitoring channel 16. Setmode Scanmode
Priority scan (default) Normal scan

Dual/tri watch

This item sets the [DUAL] switch function as dual watch or triwatch. See the section Dual watch/Tri-watch for details. Setmode DUAL/TRI
Dual watch (default) Tri-watch

Scan resume timer

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. Setmode Scantimer

Other switches also turn the function OFF, however, the corresponding function is then activated e.g. pushing [16] selects Channel 16.

Intercom

IC-M503

HM-134

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.
TALK or LSTN appears on the caller or listener function display, respectively.
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 available.
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CONNECTIONS AND MAINTENANCE

I Antenna

A key element in the performance of any communication system is an antenna. Ask your dealer about antennas and the best places to mount them.

I Unpacking

The following accessories are supplied: Qty. 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 (mm).. 2 u Mounting screws (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 damaged fuse with a new, rated one.

I Cleaning

If the transceiver becomes dusty or dirty, wipe it clean with a soft, dry cloth. AVOID the use of solvents such as benzene or alcohol, as they may damage transceiver surfaces.

i w r o

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I Connections

w EXTENSION JACK Connects to the optional DS-100 (#02) DSC CONTROLLER. e EXTERNAL MICROPHONE CONNECTOR Connects to the optional HM-134 REMOTE-CONTROL MICROPHONE. Intercom function is available. CAUTION: NEVER connect another microphone such as the HM-127, etc. It may cause damage to the transceiver. r ANTENNA CONNECTOR Connects a marine VHF antenna with a PL-259 connector to the transceiver.
q DC POWER CONNECTOR Connects the supplied DC power cable from this connector to an external 12 V DC power source.
CAUTION: Transmitting without an antenna may damage the transceiver.
t EXTERNAL SPEAKER JACK Connects to an external speaker. See Options on 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.
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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 transceiver. Optional unit
r Return the shielding plate and assemble the units to their original positions.
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I Dimensions

145.0 (5 2332)

110.0 (4 1132)

109.4 (4 516)

165.0 (6 12)

31.4 (1 1/4)

(2 3/32)

Unit: mm (inch)
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TROUBLESHOOTING

PROBLEM No power comes ON. No sound comes from the speaker. POSSIBLE CAUSE Bad connection to the power supply. Squelch level is too deep. Volume level is too low. Speaker has been exposed to water. SOLUTION Check the connection to the transceiver. Set squelch to the threshold point. Set [VOL] to a suitable level. Drain water from the speaker. Change channels. Push [HI/LO] to select high power. Set the desired channels as TAG channels. Turn the beep tone ON in SET mode. Turn the optional voice scrambler ON. Reset the scramble code.
REF. p. 19 p. 8 p. 8 pgs. 6, 26 p. 8 p. 13 p. 15 p. 10 p. 16
Transmitting is impossi- Some channels are for low power or reble, or high power can - ceive only. er can not be selected. The output power is set to low. Scan does not start. No beep sounds. Receive signal cannot be understood. TAG channel is not programmed. Beep tone is turned OFF. Optional voice scrambler is turned OFF. Scramble code is not set correctly.
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CH Transmit 156.050 156.100 156.150 156.200 156.250 156.300 156.350 156.400 156.450 156.500

CHANNEL LIST

Frequency (MHz) Transmit 156.550 156.600 156.650 156.700 156.800 156.900 156.950 157.000 Receive 156.550 156.600 156.650 156.700 156.750 156.800 156.850 161.500 161.550 161.600 Frequency (MHz) Transmit 157.050 157.100 157.150 157.200 157.250 157.300 157.350 157.400 156.025 156.075 Receive 161.650 161.700 161.750 161.800 161.850 161.900 161.950 162.000 160.625 160.675 Frequency (MHz) Transmit 156.125 156.175 156.225 156.275 156.325 156.375 156.425 156.475 156.575 Receive 160.725 160.775 160.825 160.875 160.925 156.375 156.425 156.475 156.525 156.575 Frequency (MHz) Transmit 156.625 156.675 156.725 Receive 156.625 156.675 156.725 156.775 156.825 156.875 161.525 161.575 161.625 161.675 Frequency (MHz) Transmit 157.125 157.175 157.225 157.275 157.325 157.375 157.425 Receive 161.725 161.775 161.825 161.875 161.925 157.375 157.425

All stated specications are subject to change without notice or obligation.

TRANSMITTER

Output power Modulation system Max. frequency deviation Spurious emissions

RECEIVER

Receive system : Double conversion superheterodyne Sensitivity (20 dB SINAD) : Less than 3dB EMF (typical) Squelch sensitivity : Less than 0dB EMF 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-MW at 10% distortion with a 4 load HM-W at 10% distortion with a 8 load
01 IC-M503-(1).qxd 01.12.17 5:00 PM Page 28 (1,1)
HM-134 REMOTE-CONTROL MICROPHONE

OPTIONAL

The optional HM-134 remotely controls the IC-M503 and provides an optional intercom function.

q !0 o

q POWER SWITCH [PWR] (pgs. 8, 33) When the IC-M503 power is turned ON, push and hold for 2 sec. to turn the HM-134 power ON or OFF. w PTT SWITCH [PTT] (pgs. 8, 33) Push and hold to transmit; release to receive. Y Z 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 adjust audio level or noise squelch level, respectively. (pgs. 8, 33) In set mode, changes setting of the selected item. (pgs. 9, 37) During scanning, checks tag channels or changes scanning 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)
CALL appears when call channel is selected.

MONI L DIM

i u y t
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

01 IC-M503-(1).qxd 01.12.17 5:00 PM Page 29 (1,1)
HM-134 REMOTE-CONTROL MICROPHONE 12
Enter set mode when pushed and held while turning power ON. (pgs. 14, 37) t DIAL SWITCH [DIAL] 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 EUR version has International channels only and this function is not available. microphone key lock function is turned ON.
Advances the cursor while in memory name programming condition. (pgs. 9, 38) i VOLUME/DIMMER SWITCH [VOLDIM] After pushing [VOL], [Y]/[Z] adjusts the audio level. Push and hold [VOLDIM] for 1 sec. to adjust the brightness of the LCD and switch backlight. (p. 34) Moves the cursor backward while in memory name programming condition. (pgs. 9, 38) o TRANSMIT POWER SWITCH [H/L] When pushed, toggles high and low power. (pgs. 8, 33)

Connection mold

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In set mode, indicates the selected condition. (pgs. 14, 37) r VOLUME INDICATOR (p. 33) Appears while audio output level is adjusted. t SQUELCH INDICATOR (p. 33) Appears while noise squelch level is adjusted. y CHANNEL NAME INDICATOR Channel comment appears (and scrolls) if programmed. (pgs. 9, 38) In set mode, indicates or scrolls the selected set mode item. (pgs. 14, 37) u SCRAMBLER INDICATOR (pgs. 10, 35) Appears when an optional voice scrambler is activated. i SCAN INDICATOR (pgs. 13, 36) SCAN appears during normal scan. P SCAN appears during priority scan. o PRIORITY CHANNEL INDICATOR Indicates a priority channel during priority scan or dual/tri-watch. (pgs. 12, 36) IC appears during intercom mode. (pgs. 17, 38) !0 DUAL/TRI WATCH INDICATOR (pgs. 11, 36) DUAL appears during dualwatch; TRI during tri-watch. !1 LOW POWER INDICATOR (pgs. 8, 33) 31 Appears when low power is selected. !2 CALL CHANNEL INDICATOR (pgs. 6, 32) Appears when the call channel is selected. !3 DUPLEX INDICATOR (pgs. 6, 32) Appears when a duplex channel is selected. !4 TAG CHANNEL INDICATOR (pgs. 13, 36) Appears when a tag channel is selected. !5 BUSY INDICATOR (pgs. 8, 33, 34) Appears when receiving a signal or when the squelch opens. !6 TRANSMIT INDICATOR (pgs. 8, 33) Appears while transmitting. !7 WAIT INDICATOR WAIT appears in the HM-134 display while transmitting via the IC-M503s attached microphone.
In the above case, the connected HM-134 does not have priority.
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q Push [16C] to select Channel 16. w Push [DIAL] to return to the condition before selecting Channel 16, or push [Y] or [Z] to select operating channel.
Output power turns to 25W automatically, whenever Channel 16 is selected.
U.S.A. and International channels
q Push [DIAL] to select regular channel. w While pushing and holding [H/L], push [DIAL] to select channel group.
U.S.A. or International can be selected in sequence.
q Push and hold [16C] for 1 sec. to select call channel. w Push [DIAL] to return to the condition before selecting call channel, or push [Y] or [Z] to select operating channel.

U.S.A. channels

Push and hold then push

International channels

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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.
t Push and hold [PTT] to transmit, then speak into the microphone.
appears. Channel 70 cannot be used for transmission (for GMDSS use).
e Push [Y]/[Z] to select the desired channel.
When receiving a signal, appears and audio is emitted from the speaker. Further adjustment of audio level may be necessary at this point. Use the optional voice scrambler function for privacy. (pgs. 10, 35)
y Release [PTT] to receive. IMPORTANT: To maximize the readability of your transmitted 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.
r Push [H/L] to select the output power, if necessary.
LOW appears when low power is selected. Choose low power for shorter, high power for longer distance communications. Some channels are low power only.

q Turn power ON

r Set output power
t Push to transmit y Release to receive e Set channel
w Set volume w Set squelch, if required t Speak into microphone 33
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I Lock functions

The lock function electronically locks keys and switches to prevent accidental changes and function access from the microphone.
All keys, switches and controllers on the transceiver are functional.

I Display backlighting

The function display and switches can be backlit for better visibility under low light conditions. And the backlighting condition can be adjusted independently from the transceiver. q Push and hold [VOLDIM] for 1 sec. to enter backlight adjusting mode.
with number of backlight level appears in the channel name indicator.
Activating the lock function
While pushing and holding [H/L], push [SQL] to turn the lock function ON and OFF.
appears. Only [PWR], [PTT], [H/L], [SQLMONI], [VOL]+[Y]/[Z] and [SQL]+[Y]/[Z] are functional.
w Push [Y]/[Z] to adjust the backlight level.
The backlight level is adjustable between 0 (lights OFF) and 3 (brightest).

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 monitor function.
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. Only [PWR] and [PTT] are functional.
Flashes when the all lock function is in use.
ashes and audio is emitted. Any key, except [Y]/[Z], cancels the monitor function.
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q While pushing and holding [H/L], push [DIAL] several times to select the desired channel group (USA or INT) to be programmed. w Push and hold [16C] for 1 sec. to select the call channel of the selected channel group.
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.

SCRM appears.

e To turn the scrambler function OFF, repeat step w. Appears when the voice

SCRM disappears.

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.
scrambler function is in use.
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.
r Push [Y]/[Z] to select the desired channel.
t Push [16C] to program the displayed channel as the call channel.
The call channel number and channel group stop ashing.
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q While pushing and holding [H/L], push [DIAL] several times to select the channel group (USA or INT), if desired. w Push [SCAN] to start priority or normal scan.
SCAN appears during normal scan. The priority channel readout indicates 16, and P and SCAN indicators appear 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 monitored during priority scan). Push [Y]/[Z] to check the scanning tag channels, to change the scanning direction or resume the scan manually.

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.

appears.

I Dualwatch/Triwatch operation
q Push [Y]/[Z] to select the desired channel.
While pushing and holding [H/L], push [DIAL] several times to select the channel group (USA, INT), if desired.
w Push [DUAL] to start dualwatch or tri-watch.
DUAL appears during dualwatch; TRI appears 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.
r To cancel the tag channel setting, push and hold [SCANTAG] for 1 sec.

disappears.

e To cancel dualwatch/tri-watch, push [DIAL] again.
e To stop the scan, push [SCAN].
SCAN disappears. Pushing [PTT], [16C] or [DIAL] also stops the scan.
Clearing all tag channels in the selected channel group While pushing and holding [H/L], push [SCANTAG] for 3 sec. to clearing all tag channels. (until long beep changes to 2 short beeps)
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Set mode is used to change the condition of the transceivers functions and the microphones own functions: Transceivers functions Scan mode (normal or priority), scan resume timer, dualwatch/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. In this section, instructions are for the microphones own functions only. Refer to pgs. 1416 for the setting of the other functions. (Some functions may not be selectable from the microphone.)
Beep tone BEEP Push [Y] to turn ON, [Z] to turn OFF the beep output.
LCD contrast LCD CONTRAST Push [Y]/[Z] to adjust to a suitable LCD contrast. Push

Entering set mode

q Turn power OFF. w While pushing and holding [16C], turn power ON.
After beep emission, a set mode item (in the channel name indicator and condition in the channel number readout) is displayed.
Internal speaker INT-SPEAKER Push [Y]/[Z] to turn the HM-134 internal-speaker ON/OFF.
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.
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q Push and hold [DUAL] for 1 sec. to activate the intercom function.
IC appears in the priority channel readout. The channel name disappears.
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.

T. Maebayashi General Manager

Signature

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Count on us!

< Intended Country of Use > GER AUT GBR IRL FRA NED BEL LUX ESP POR ITA GRE SWE DEN FIN 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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