Icom IC-M73 User manual

INSTRUCTION MANUAL
iM73
VHF MARINE TRANSCEIVER
This device complies with Part 15 of the FCC Rules. Opera-
tion is subject to the condition that this device does not cause
harmful interference.
iM73EURO

i
New2001
FOREWORD
Thank you for purchasing this Icom product. The IC-M73/IC-
M73EURO v h f m a r i n e t r a n s c e i v e r is designed and built
with Icom’s state of the art technology and craftsmanship.
With proper care, this product should provide you with years
of trouble-free operation.
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-M73/IC-M73EURO.
EXPLICIT DEFINITIONS
WORD DEFINITION
RWARNING! Personal injury, fire hazard or electric
shock may occur.
CAUTION Equipment damage may occur.
NOTE
If disregarded, inconvenience only. No risk
of personal injury, fire or electric shock.
FEATURES
☞Submersible construction
Built tough to withstand the punishing marine
environment, the IC-M73/IC-M73EURO’s submersible
construction meets IPX8 of the corresponding
International Standard IEC 60529 (2001) while using BP-
245N.
In addition, the new speaker grill structure with a water
self-draining function is helpful for draining water or
seawater easily.
☞Dualwatch and tri-watch functions
Convenient functions that allow you to monitor the
distress channel (Ch 16) while receiving one other
channel of your choice (dualwatch), or while receiving one
other channel of your choice and the call channel (Ch 09)
(tri-watch). See p. 16 for details.
☞Large, easy-to-read LCD
With the generous dimensions of 22.5(H) × 31.5(W) mm;
7⁄8(H) × 11⁄4(W) inch, the IC-M73/IC-M73EURO’s function
display is easy to read and shows operating conditions
at a glance. Backlighting and contrast can be adjusted to
suit your preferences.
☞Simple operation
The volume knob is on top of the radio, while the channel
buttons are on the front panel. This allows for convenient,
one-handed operation.

ii
New2001
CLEAN THE TRANSCEIVER AND MICROPHONE THOR-
OUGHLY WITH FRESH WATER after exposure to water
including salt, otherwise, the keys and switch may become
inoperable due to salt crystallization.
RWARNING! NEVER connect the transceiver to an
AC outlet. This may pose a fire hazard or result in an electric
shock.
RWARNING! NEVER hold the transceiver so that
the antenna is closer than 2.5 cm (1 inch) from exposed parts
of the body, especially the face or eyes, while transmitting.
The transceiver will perform best if the microphone is 5 to
10 cm (2 to 4 inches) away from the lips and the transceiver is
vertical.
NEVER connect the transceiver to a power source
other than the BP-245N. Such a connection will ruin the
transceiver.
AVOID using or placing the transceiver in direct sunlight
or in areas with temperatures below –20°C (–4°F) or above
+60°C (+140°F).
KEEP the transceiver out of the reach of children.
KEEP the transceiver at least 0.9 meters (3.0 ft) away from
your vessel’s magnetic navigation compass.
MAKE SURE the flexible antenna and battery pack are
securely attached to the transceiver, and that the antenna
and battery pack are dry before attachment. Exposing
the inside of the transceiver to water will result in serious
damage to the transceiver.
BE CAREFUL! The IC-M73/IC-M73EURO employs
submersible construction (1.5 m; 4.9 ft depth for 30 min.).
However, once the transceiver has been dropped,
waterproofing cannot be guaranteed due to the fact that
the transceiver may be cracked, or the waterproof seal
damaged, etc.
For the U.S.A. only
CAUTION: Changes or modifications to this device, not
expressly approved by Icom Inc., could void your authority to
operate this device under FCC regulations.
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom
Incorporated (Japan) in the United States, the United Kingdom, Germany,
France, Spain, Russia and/or other countries.
PRECAUTION

iii
RADIO OPERATOR WARNING
WARNING
Icom requires the radio operator to meet the
FCC Requirements for Radio Frequency Expo-
sure. An omnidirectional antenna with gain not
greater than 9 dBi must be mounted a mini-
mum of 5 meters (measured from the lowest
point of the antenna) vertically above the main
deck and all possible personnel. This is the minimum safe
separation distance estimated to meet all RF exposure com-
pliance requirements. This 5 meter distance is based on the
FCC Safe Maximum Permissible Exposure (MPE) distance
of 3 meters added to the height of an adult (2 meters) and is
appropriate for all vessels.
For watercraft without suitable structures, the antenna must
be mounted so as to maintain a minimum of 1 meter verti-
cally between the antenna, (measured from the lowest point
of the antenna), to the heads of all persons AND all persons
must stay outside of the 3 meter MPE radius.
Do not transmit with radio and antenna when persons are
within the MPE radius of the antenna, unless such persons
(such as driver or radio operator) are shielded from antenna
field by a grounded metallic barrier. The MPE Radius is the
minimum distance from the antenna axis that person should
maintain in order to avoid RF exposure higher than the al-
lowable MPE level set by FCC.
FAILURE TO OBSERVE THESE LIMITS MAY ALLOW
THOSE WITHIN THE MPE RADIUS TO EXPERIENCE RF
RADIATION ABSORPTION WHICH EXCEEDS THE FCC
MAXIMUM PERMISSIBLE EXPOSURE (MPE) LIMIT.
IT IS THE RESPONSIBILITY OF THE RADIO OPERATOR
TO ENSURE THAT THE MAXIMUM PERMISSIBLE EXPO-
SURE LIMITS ARE OBSERVED AT ALL TIMES DURING
RADIO TRANSMISSION. THE RADIO OPERATOR IS TO
ENSURE THAT NO BYSTANDERS COME WITHIN THE
RADIUS OF THE MAXIMUM PERMISSIBLE EXPOSURE
LIMITS.
Determining MPE Radius
THE MAXIMUM PERMISSIBLE EXPOSURE (MPE) RA-
DIUS HAS BEEN ESTIMATED TO BE A RADIUS OF
ABOUT 3M PER OET BULLETIN 65 OF THE FCC.
THIS ESTIMATE IS MADE ASSUMING THE MAXIMUM
POWER OF THE RADIO AND ANTENNAS WITH A MAXI-
MUM GAIN OF 9dBi ARE USED FOR A SHIP MOUNTED
SYSTEM.

iv
AVERTISSEMENT POUR LES OPÉRATEURS RADIO
Icom exige que l'opérateur radio se conforme aux
exigences de la FCC en matière d'exposition aux
radiofréquences. Une antenne omnidirectionnelle
dont le gain ne dépasse pas 9dBi doit être fixée
à une distance minimale de 5 mètres (mesurée
depuis le point le plus bas de l'antenne) verticale-
ment au-dessus du pont principal et de tout le personnel qui peut
s'y trouver. Il s'agit de la distance de sécurité minimale prévue pour
satisfaire aux exigences de conformité en matière d'exposition aux
RF. Cette distance de 5 mètres est établie en fonction de l'exposition
maximale admissible sécuritaire de 3 mètres établie par la FCC, à
laquelle on ajoute la hauteur d'un adulte (2 mètres); cette distance
convient pour tous les navires.
Dans le cas des embarcations sans structure convenable, l'antenne
doit être fixée de façon à maintenir une distance minimale de 1 mètre
verticalement entre cette antenne (mesurée depuis son point le plus
bas) et la tête de toute personne présente; toutes les personnes
présentes doivent se tenir à l'extérieur d'un rayon d'exposition maxi-
male admissible de 3 mètres.
Ne pas émettre à l'aide de la radio et de l'antenne lorsque des
personnes se trouvent à l'intérieur du rayon d'exposition maximale
admissible de cette antenne, à moins que ces personnes (comme
le conducteur ou l'opérateur radio) ne soient protégées du champ
de l'antenne par un écran métallique relié à la masse. Le rayon
d'exposition maximale admissible équivaut à la distance minimale
que cette personne doit maintenir entre elle et l'axe de l'antenne pour
éviter une exposition aux RF supérieure au niveau d'exposition maxi-
male admissible fixé par la FCC.
LE NON-RESPECT DE CES LIMITES PEUT CAUSER, POUR LES
PERSONNES SITUÉES DANS LE RAYON D'EXPOSITION MAXI-
MALE ADMISSIBLE, UNE ABSORPTION DE RAYONNEMENT DE
RF SUPÉRIEURE À L'EXPOSITION MAXIMALE ADMISSIBLE
FIXÉE PAR LA FCC.
L'OPÉRATEUR RADIO EST RESPONSABLE D'ASSURER QUE
LES LIMITES D'EXPOSITION MAXIMALE ADMISSIBLE SOIENT
RESPECTÉES EN TOUT TEMPS PENDANT LA TRANSMISSION
RADIO. L'OPÉRATEUR RADIO DOIT S'ASSURER QU'AUCUNE
PERSONNE PRÉSENTE NE SE SITUE À L'INTÉRIEUR DU RAY-
ON D'EXPOSITION MAXIMALE ADMISSIBLE.
Établir le rayon d'exposition maximale admissible
ON ESTIME QUE LE RAYON D'EXPOSITION MAXIMALE ADMIS-
SIBLE EST D'ENVIRON 3 M, TEL QUE STIPULÉ DANS LE BUL-
LETIN OET 65 DE LA FCC. CETTE DISTANCE ESTIMÉE TIENT
COMPTE D'UN SYSTÈME INSTALLÉ SUR UN NAVIRE UTILISANT
LA PUISSANCE MAXIMALE DE LA RADIO ET DES ANTENNES
DONT LE GAIN MAXIMAL EST DE 9dBi.
AVERTISSEMENT

v
COUNTRY CODE LIST
• ISO 3166-1
Country Codes Country Codes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Austria
Belgium
Bulgaria
Croatia
Czech Republic
Cyprus
Denmark
Estonia
Finland
France
Germany
Greece
Hungary
Iceland
Ireland
Italy
Latvia
AT
BE
BG
HR
CZ
CY
DK
EE
FI
FR
DE
GR
HU
IS
IE
IT
LV
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Liechtenstein
Lithuania
Luxembourg
Malta
Netherlands
Norway
Poland
Portugal
Romania
Slovakia
Slovenia
Spain
Sweden
Switzerland
Turkey
United Kingdom
LI
LT
LU
MT
NL
NO
PL
PT
RO
SK
SI
ES
SE
CH
TR
GB
FOR CLASS A UNINTENTIONAL RADIATORS
This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment
is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruc-
tion manual, may cause harmful interference to radio commu-
nications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will
be required to correct the interference at his own expense.
CAUTION: Changes or modifications to this device, not ex-
pressly approved by Icom Inc., could void your authority to
operate this device under FCC regulations.
FCC INFORMATION

vi
New2001
IN CASE OF EMERGENCY
If your vessel requires assistance, contact other vessels and
the Coast Guard by sending a distress call on Channel 16.
❍ USING CHANNEL 16
DISTRESS CALL PROCEDURE
1. “MAYDAY MAYDAY MAYDAY.”
2. “THIS IS ...........................” (name of vessel)
3. Say your call sign or other indication of the
vessel.
4. “LOCATED AT ..................... ” (your position)
5.State the nature of the distress and
assistance required.
6. Give any other information which might
facilitate the rescue.
RECOMMENDATION
CLEAN THE TRANSCEIVER THOROUGHLY WITH
FRESH WATER after exposure to saltwater, and dry
it before operation. Otherwise, the transceiver’s keys,
switches and controllers may become inoperable due to salt
crystallization.
NOTE: DO NOT wash the transceiver in water if there is any
reason to suspect the waterproofing may not be effective.
For example, in cases where the transceiver/battery pack is
cracked or broken, or has been dropped, or when the battery
pack is detached from the transceiver.

vii
New2001
TABLE OF CONTENTS
FOREWORD .........................................................................i
IMPORTANT..........................................................................i
EXPLICIT DEFINITIONS....................................................... i
FEATURES............................................................................ i
PRECAUTION ...................................................................... ii
RADIO OPERATOR WARNING .......................................... iii
AVERTISSEMENT POUR LES OPÉRATEURS RADIO...... iv
FCC INFORMATION ............................................................ v
COUNTRY CODE LIST........................................................ v
IN CASE OF EMERGENCY................................................ vi
RECOMMENDATION .......................................................... vi
TABLE OF CONTENTS...................................................... vii
1 OPERATING RULES.......................................................1
2 SUPPLIED ACCESSORIES AND ATTACHMENTS........2
■ Supplied accessories ...................................................2
■ Attachments .................................................................2
3 PANEL DESCRIPTION ....................................................4
■ Front, top and side panels............................................4
■ Function display ...........................................................6
4 BASIC OPERATION........................................................8
■ Channel selection.........................................................8
■ Receiving and transmitting.........................................11
■ Call channel programming .........................................12
■ Lock function ..............................................................12
■ Monitor function..........................................................12
■ Adjusting the squelch level.........................................13
■ AquaQuake water draining function ...........................13
5 SCAN OPERATION.......................................................14
■ Scan types .................................................................14
■ Setting Favorite channels...........................................15
■ Starting a scan ...........................................................15
6 DUALWATCH/TRI-WATCH............................................16
■ Description .................................................................16
■ Operation....................................................................16
7 FUNCTION MODE OPERATION...................................17
■ About the function mode ............................................17
■ Play back function ......................................................18
■ Manual recording function..........................................19
■ Automatic recording function......................................20
■ Backlighting function ..................................................21
■ Channel naming function ...........................................21
■ Opening comment entry function ...............................22
■ ATIS code programming.............................................23
8 SET MODE ....................................................................25
■ SET mode programming ............................................25
■ SET mode items.........................................................26
9 Battery charging ..........................................................31
■ Battery cautions .........................................................31
■ Supplied battery charger............................................33
■ Optional battery chargers...........................................34
10 OPTIONAL SWIVEL BELT CLIP ..................................35
■ Attachment .................................................................35
■ Detachment................................................................35
11 OPTIONAL SPEAKER-MICROPHONE ........................36
■ HM-167 descriptions ..................................................36
■ Attachment .................................................................36
12 SPECIFICATIONS .........................................................38
13 VHF MARINE CHANNEL LIST .....................................40
14 OPTIONS.......................................................................43

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New2001
1
OPERATING RULES
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PrioritiesD
• Read all rules and regulations pertaining to call 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.
• False or fraudulent distress calls are prohibited under law.
PrivacyD
• Information overheard, but not intended for you, cannot law-
fully be used in any way.
• Indecent or profane language is prohibited.
Radio licensesD
(1) SHIP STATION LICENSE
You may require a current radio station license before using
the transceiver. It is unlawful to operate a ship station which is
not licensed, but required to be.
If required, contact your dealer or the appropriate govern-
ment agency for a Ship-Radiotelephone license application.
This government-issued license states the call sign which is
your craft’s identification for radio purposes.
(2) OPERATOR’S LICENSE
A Restricted Radiotelephone Operator Permit is the license
most often held by small vessel radio operators when a radio
is not required for safety purposes.
If required, the Restricted Radiotelephone Operator Permit
must be posted or kept with the operator. If required, only a
licensed radio operator may operate a transceiver.
However, non-licensed individuals may talk over a transceiver
if a licensed operator starts, supervises, ends the call and
makes the necessary log entries.
A current copy of the applicable government rules and regu-
lations is only required to be on hand for vessels in which
a radio telephone is compulsory. However, even if you are
not required to have these on hand it is your responsibility to
be thoroughly acquainted with all pertinent rules and regula-
tions.
NOTE: Even though the transceiver is capable of opera-
tion on VHF marine channels 3, 21, 23, 61, 64, 81, 82 and
83, according to FCC regulations these simplex channels
cannot be lawfully used by the general population in USA
waters.

2
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SUPPLIED ACCESSORIES AND ATTACHMENTS
2
■Supplied accessories
The following accessories are supplied: Qty.
qHandstrap....................................................................... 1
wBattery charger (with two screws) ................................. 1
eBelt clip (with two screws)............................................... 1
rLi-Ion battery pack ......................................................... 1
tAC adapter .................................................................... 1
yFlexible antenna ............................................................ 1
uCigarette lighter cable .................................................... 1
■Attachments
Flexible antennaD
Connect the supplied flexible
antenna to the antenna connector.
CAUTION: Transmitting without
an antenna may damage the
transceiver.
NEVER HOLD by the antenna
when carrying the transceiver.
HandstrapD
Pass the handstrap through the
loop on the top corner of the
transceiver as illustrated at left.
Facilitates carrying.
qw e
r
ty
u
(Not supplied or different type
may be supplied depending
on the version)
(May not be supplied,
depending on the version)

3
2
SUPPLIED ACCESSORIES AND ATTACHMENTS
New2001
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
New2001
DBattery pack
qAttach the battery pack into the transceiver as below.
wLock the battery pack with the latch.
CAUTION:
NEVER attach or detach the battery pack when wet.
Be careful when releasing the latch. Because the latch is
tightly locked, don’t use a finger nail to open it— you may
injure yourself. Instead, use something relatively flat, like
the edge of a coin or the tip of a screwdriver, to carefully
release the latch.
DBelt clip
Attach the belt clip to the transceiver as illustrated below.
Supplied screws

4
New2001New2001
PANEL DESCRIPTION
3
■Front, top and side panels
q
w
e
y
t
r
Microphone
!2
!1
!0
o
u
i
Speaker
Function
display
(p. 6)
qVOLUME CONTROL [VOL]
Turns power ON and adjusts the audio level.
wPTT SWITCH [PTT]
Hold down to transmit; release to receive.
e MONITOR KEY [ ]
• Manually opens the squelch for monitoring the channel
while held down. (p. 10)
• Push this switch, then adjust the squelch level with [Y]/
[Z]. (p. 11)
• While holding down this switch, turn power ON to enter
the SET mode. (p. 17)
rCHANNEL 16 KEY [16/C]
• Selects Channel 16 when pushed. (p. 7)
• Selects call channel when pushed for 1 second. (p. 7)
• Enters call channel write mode when the call channel is
selected and this key is held down for 3 seconds. (p. 10)
tFUNCTION KEY [F]
• Enter the function mode. (p. 7)
• The AquaQuake function is activated after hold down for
1 second. (p. 7)
ySCAN KEY [SCAN•DUAL]
• Starts and stops normal or priority scan when pushed.
(pp. 14, 15)
• Enters watch mode when held down for 1 second. (p. 16)

New2001
5
3
PANEL DESCRIPTION
New2001
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
uCHANNEL/WEATHER CHANNEL KEY
[CH/WX•U/I/C] (IC-M73), [CH] (IC-73EURO)
• Selects and toggles the regular channels and weather
channel* when pushed. (p. 8)
• Selects the U.S.A, International, or Canadian* channel
group when held down for 1 second. (p. 8)
- The function display shows which channel group is
active.
• Push to return to the condition before selecting the
channel when the priority channel or the call channel is
selected.
*Available with the U.S.A. and EXP versions only.
NOTE: [CH/WX•U/I/C] and [CH] write as [CH/WX•U/I/
C] in this instruction manual.
iCHANNEL UP/DOWN KEYS [Y]/[Z]
• Selects an operating channel. (pp. 7–9)
• Selects the SET mode condition of the item. (p. 17)
• Selects the SET mode item when pushed with [].
(p. 17)
• Checks Favorite (TAG) channels or changes scanning
direction during scan. (p. 15)
oTRANSMIT POWER/LOCK KEY [H/L•LOCK]
• Selects high, middle or low power when pushed. (p. 9)
• Toggles the lock function ON/OFF when held down for 1
second. (p. 10)
!0 FAVORITE (TAG) KEY [FAV•★]
• Push this key to sequentially select the Favorite (TAG)
channels, while ignoring untagged channels, in a
channel group. (p. 8)
• Hold down for 1 second to set or clear Favorite (TAG) for
the displayed channel. (p. 8)
• While holding down this key, turn power ON to clear or
set all Favorite (TAG) channels in the selected channel
group. (p. 8)
!1 SPEAKER-MICROPHONE CONNECTOR [SP MIC]
Connects the optional external speaker-microphone or
headset.
NOTE: Attach the [SP MIC] cap when the optional
speaker-microphone or headset is not used.
!2 ANTENNA CONNECTOR
Connects the supplied antenna.

6
3PANEL DESCRIPTION
New2001
■Function display
q
w
r
u
e
t
i
y
o
!1 !2
!4
!3
!5
!6
!7
!0
qCHANNEL NUMBER READOUT
• Indicates the selected operating channel number.
• In SET mode, indicates the selected condition.
• “DUP” appears when a duplex channel is selected.
w FAVORITE CHANNEL INDICATOR (p. 15)
Appears when favorite channel is selected.
e BATTERY INDICATOR
Indicates remaining battery power.
Indication
Full Middle Charging
required No battery
Battery level
blinks when the battery is overcharged (or over voltage).
r DUALWATCH/TRI-WATCH INDICATORS (p. 16)
“DUAL” blinks during dualwatch; “TRI” blinks during tri-
watch.
t VOX INDICATOR (p. 12)
Appears when the VOX function using is available.
Ask your dealer for details.
y MONITOR INDICATOR (p. 10)
Appears when the monitor function is activated.
u AUTOMATIC RECORDING INDICATOR (pp. 11, 22)
Appears when the automatic recording is activated.
i RECORDING INDICATOR
Appears while the receiving audio is recording.
o CHANNEL NAMING
• Indicates or scrolls operating channel name or
comment. (p. 13)
• In SET mode, indicates or scrolls the selected item. (pp.
17–22)
!0 LOCK INDICATOR (p. 10)
Appears when the lock function is activated.
!1 ATIS INDICATOR (p. 10)
Appears when the channel group, which ATIS function is
activated, is selected.
• Available with the German and Holland versions only.

7
3
PANEL DESCRIPTION
New2001
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
!2 CALL CHANNEL INDICATOR (p. 7)
Appears when the call channel is selected.
!3 CHANNEL GROUP INDICATOR (p. 8)
“USA” appears when U.S.A.; “INT” appears when
International; “CAN*” appears when Canadian channel
group is selected.
*Available with the U.S.A. and EXP versions only
!4 WEATHER CHANNEL/WEATHER ALERT INDICATORS
(p. 8)
• “ ” appears when the weather channel group is
selected.
• “ ” appears when the weather alert function is
activated.
!5 TRANSMIT POWER INDICATORS (p. 9)
• “LOW” appears when low power is selected.
• “MID” appears when middle power is selected.
• No indication appears when high power is selected.
!6 TRANSMIT INDICATOR (p. 9)
Appears during transmit.
!7 BUSY INDICATOR (pp. 9, 10)
Appears when a signal is received or squelch is open.

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BASIC OPERATION
4
New2001
■Channel selection
IMPORTANT!: Prior to using the transceiver for the first
time, fully charge the battery pack. This will help maxi-
mize the capability and life of the battery. To avoid dam-
age to the transceiver, turn the radio OFF while charging.
D Channel 16
Channel 16 (Distress channel) is used for establishing initial
contact with another station and for emergency communica-
tions. Channel 16 is automatically monitored during both du-
alwatch and tri-watch. While standing by, you must monitor
Channel 16.
qPush [16•9] to select Channel 16.
wPush [CH/WX•U/I/C] to return to the condition before
selecting Channel 16, or push [Y]/[Z]to select the
operating channel.
Push
DChannel 9 (Call channel)
Channel 9 is the leisure-use call channel. Each regular
channel group has separate call channels. In addition, the
call channel is monitored during tri-watch. The call channels
can be re-programmed (p. 10) and may be used to store your
most often used channels in each channel group for quick
recall.
qHold down [16•9] for 1 second to select the call channel.
• “CALL” and the call channel number appear.
• Call channel can be re-programmed. See the “Call channel
programming” on p. 10 for details.
wPush [CH/WX•U/I/C] to return to the condition before
selecting Channel 9 (call channel), or push [Y]/[Z]to
select the operating channel.
Hold down
for 1 sec.

New2001New2001
9
4
BASIC OPERATION
New2001
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2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DU.S.A., International, Canadian and ATIS
channels
The IC-M73/IC-M73EURO have U.S.A.*1, International,
Canadian*2and ATIS*3channels.You must select the proper
channels for the operating area.
*1U.S.A., EXP, China and U.K. versions only
*2U.S.A and EXP versions only.
*3German and Holland versions only.
qPush [CH/WX•U/I/C] to select the regular channel.
• If the weather channel appears, push [CH/WX•U/I/C] again.
wPush [Y]/[Z]to select a channel.
• “DUP” appears for duplex channels.
eTo change the channel group, hold down [CH/WX•U/I/C]
for 1 second.
• Repeat until you reach the desired channel group.
For U.K. version
U.S.A. channelsInternational channels
Hold down
for 1 sec.
Hold down
for 1 sec.
Hold down
for 1 sec.
Hold down
for 1 sec.
Hold down
for 1 sec.
For German and Holland versions
For U.S.A. and China versions
International channels
International channels
U.S.A. channels
ATIS channels
Canadian channels

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4BASIC OPERATION
New2001
DWeather channels
The IC-M73 has 10 weather channels. They are used for
monitoring NOAA (National Oceanographic and Atmospheric Ad-
ministration) broadcasts (reception of weather channels possible
in U.S.A. only).
qPush [CH/WX•U/I/C] to select the weather channel group.
wPush [Y]/[Z]to select a weather channel.
ePush [CH/WX•U/I/C] to return to the condition before
selecting the weather channel group.
✔CONVENIENT!
The IC-M73 can detect a weather alert tone on the selected
weather channel while in another channel (when the power
save function is turned ON) or during scanning. See the “SET
mode items” on p. 18 for details.

11
4
BASIC OPERATION
New2001
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
■Receiving and transmitting
CAUTION: Transmitting without an antenna may
damage the transceiver.
q Rotate [VOL] clockwise to turn power ON.
• Opening comment scrolls across the function display. (p. 13)
• Push [16/•] to skip the opening comment indication.
w Set the volume and squelch level.
➥Push [ ], and push [Z]to open the squelch.
➥Rotate [VOL] to set the volume level.
➥Push [ ], and push [Y]/[Z]to set the squelch level.
e Push [Y]/[Z]to select the desired channel.
- When receiving a signal, “ ” indicator appears while audio
is emitted from the speaker.
- Further adjustment of [VOL] may be necessary at this point.
r Push [H/L•LOCK] to select the output power, if necessary.
- “LOW” appears when low power is selected; “MID” appears
when middle power is selected; no indication when high power
is selected.
- Choose low or mid. power to conserve battery power, choose
high power for longer distance communications.
- Some channels are for low power only.
t Hold down [PTT] to transmit, and speak into the
microphone.
- The transmit indicator appears while transmitting.
- Channel 70 cannot be used for transmission.
y Release [PTT] to receive.
IMPORTANT: To maximize the readability of your trans-
mitted signal, pause a second after pushing [PTT], hold
the microphone 5 to 10 cm (2 to 4 inches) from your mouth,
and speak into the microphone using a normal voice level.
NOTE: The transceiver has a power save function to con-
serve the battery power. The power save function acti-
vates automatically when no signal is received for 5 sec-
onds.
To prevent accidental prolonged transmission, etc., the
IC-M73 has a time-out timer function. This timer cuts a
transmission OFF after 5 min. of continuous transmission.
qPower ON
wSet volume
wSet the squelch
level
wSet the squelch
level
eSelect the
channel
rSet output power
tPush to transmit
yRelease to receive
Microphone
Speaker

12
4BASIC OPERATION
New2001
12
■Call channel programming
The call channel key is used to select Channel 9 by default,
however, you can program your most often-used channel in
each channel group for quick recall.
qHold down [CH/WX•U/I/C] for 1 second several times to
select the desired channel group (USA, INT, CAN) to be
programmed.
wHold down [16•9] for 1 second to
select the call channel.
• “CALL” and call channel number appear.
eHold down [16•9] agai n for 3
seconds (until a long beep changes to
2 short beeps) to enter call channel
programming condition.
• Call channel number to be programmed
blinks.
rPush [Y]/[Z]to select the desired
channel.
tPush [16•9] to program the displayed
channel as the call channel.
• The call channel number stops blinking.
■Lock function
This function electronically locks all keys (except for [PTT],
[ ] and [H/L•LOCK])to prevent accidental channel changes
and function access.
➥Push [H/L•LOCK] for 1 second to turn the lock function
ON or OFF.
Hold down
for 1 sec.
Appears while the loc
k
function is in use.
■Monitor function
The monitor function releases the noise squelch mute to
check the volume level. See p. 19 for details of the monitor
switch action.
➥Hold down [ ] for 1 second to activate the monitor func-
tion.
• “ ” and “ ” appear and audio is emitted.
Appears while the
monitor function is
in use.
Hold down
for 1 sec.