Icom Ic_r20 Communications Reciever Instruction Manual

							8
2
BATTERY INSTALLATION/CHARGING
12
■Battery installationMake sure receiver power is turned OFF before installing or
replacing the batteries.
qRemove the battery cover from the receiver.
wFor alkaline battery use, attach the supplied battery spacer.
eInstall 3 R6 (AA) size alkaline batteries.•Be sure to observe the correct polarity.Keep the battery contacts clean to avoid rust or poor contact.
It’s a good idea to clean the battery terminals once a week.
D D
Battery pack installationqRemove the battery cover from the receiver.
wRemove the supplied battery spacer for R6 (AA) size bat-
tery use.
eInstall the Li-Ion battery pack (BP-206).
•Be sure to observe the correct direction.
•Charge the Li-Ion battery pack before use.•Battery pack installation
•Battery pack removal
qw
e 
						

							■CautionD
D
Battery cautionCAUTION! NEVERshort the battery terminals. Current will
flow into metal objects, so be careful when placing battery
pack in handbags, etc.
NEVERincinerate used battery packs or battery cells. Internal
battery gas may cause explosion.
NEVERmix old and new batteries. Make sureall battery cells
are the same brand, type and capacity. 
Either of the above may cause a fire hazard or damage the
receiver if ignored.D D
Charging cautionRecommended temperature for charging:
±0˚C to +35˚C (; +32˚F to +95˚F)
Connect the supplied (or optional for some versions) AC
adaptor or optional cigarette lighter cable only when charging
the battery pack (BP-206). NEVER use other manufacture’s
chargers.
AVOIDleaving the battery pack in a fully charged, or com-
pletely discharged condition for long time. It causes shorter
battery life. In case of leaving the battery pack unused for a
long time, it must be kept safely after discharge, or use the
battery for 2 or 3 hours, then remove it from the receiver.
If your battery pack seems to have no capacity even after
being charged, fully charge the battery pack again. If the bat-
tery pack still does not retain a charge (or very little), a new
battery pack must be purchased.CAUTION: BE SUREto disconnect the CP-18A/E from
the cigarette lighter socket when charging is finished, be-
cause, a slight current still follows in the CP-18A/E and the
vehicle’s battery will become exhausted.
■Battery chargingD
D
Regular chargingqInsert the battery pack (BP-206) into the receiver. (p. 8)
wPlug the AC adaptor (BC-149A/D*) into an AC outlet; or the
optional CP-18A/E into a cigarette lighter socket.
*Not supplied with some versions.
eTurn OFF the receiver, then insert the adaptor plug into
[DC] of the receiver.
R R
WARNING!: NEVERattempt to charge any other bat-
teries. Because the IC-R20 can charge the BP-206 only.
IC-R20
to [DC]
jack
Optional CP-18A/E
Cigarette lighter cable 
with DC-DC converter
AC adaptor
BC-149A/Dto cigarette 
lighter socket
to AC outlet
Charging periods: 8 hours (w/BP-206)
Turn power 
OFF.
9
2
BATTERY INSTALLATION/CHARGING 
						

							10
2
BATTERY INSTALLATION/CHARGING
2
D D
CP-18A/E fuse replacementIf the fuse blows or the receiver stops functioning while oper-
ating with the optional CP-18A/E, find the source of the prob-
lem if possible, and replace the damaged fuse with a new
rated one (FGB 5 A) as shown below.
D D
Rapid charging with the BC-156The optional BC-156 provides rapid charging of battery pack
(BP-206).
•Charging periods:2.5 hours (w/BP-206)
CAUTION:Shorten or remove the telescoping antenna be-
fore charging to prevent the receiver from overturning.
If the charge indicator flashes orange, there may be a
problem with the battery pack (or charger). Reinsert the
battery pack or contact your dealer.
Turn power OFF.
BC-156Check the 
orientation. Shorten or remove 
the antenna.
AC adaptor 
(supplied with BC-156)
Fuse 5 A
Recommendation:Charge the supplied battery pack for a maximum of
8hours. Li-Ion batteries are different from Ni-Cd bat-
teries in that it is not necessary to completely charge
and discharge them to prolong the battery life. There-
fore, charging the battery in intervals, and not for ex-
tended periods is recommended. 
						

							11
FREQUENCY AND CHANNEL SETTING
3■Mode selectionD
D
VFO modeVFO mode is used for the desired frequency setting within the
frequency coverage.
➥Push [VFO MHz]to select VFO mode.What is VFO?
VFO is an abbreviation of Variable Frequency Oscillator. Fre-
quencies for receiving are generated and controlled by theVFO.
D D
Memory mode/PreSet
*/TV
*/Weather
†channels
Memory mode is used for operation of memory channels
which have programmed frequencies. PreSet channels are
used for most-often used frequencies for quick recall. 
*Appears only when PreSet channels/TV channels are
programmed via the optional CS-R20.
†Available for the USA version only.
qPush [MR S.MW]several times to select the channel type.•Memory/PreSet/TV /Weather channels can be selected in se-
quencewRotate [R-DIAL]to select the desired channel.•Only programmed memory channels can be selected.
•Entering keypad directly can be selected the desired memory
channel.
•See p. 26 for memory programming details.
√
µ
MODE
ANLAFC TSQL
FM
146100
PSKIP
-DUP
001
DIAL.SEL SWEEP CENTER
T-SCAN SKIP M.N
TONE SET TS
ATTRF GAIN
IC Recorder
123
4560
789BANDDUALWATCH
MAIN/SUB
POWER
VFO
MHzMODE
SCANMR
S.MW
SCOPE
LOCK
RECAFC
“µ  ” and memory channel 
 number appear. • Memory mode indication
MR
S.MW
DIAL.SEL SWEEP CENTER
T-SCAN SKIP M.N
TONE SET TS
ATTRF GAIN
IC Recorder
123
4560
789BANDDUALWATCH
MAIN/SUB
POWER
VFO
MHz
VFO
MHz
MODE
SCANMR
S.MW
SCOPE
LOCK
RECAFC
√MODE
ANLAFC TSQL
FM
146560
PSKIP
-DUP
• VFO mode indication 
						

							12
3
FREQUENCY AND CHANNEL SETTING 
3
■Operating band selectionThe receiver can receive the AM broadcast, HF bands,
50 MHz, FM broadcast, VHF air, 144 MHz, 300 MHz,
400 MHz, 800 MHz,* 1200 MHz or 2400 MHz.
➥In VFO mode, push [BAND]several times to select the de-
sired frequency band.•If the other than VFO mode is selected, such as a memory/Pre-
Set/TV/Weather channel, push [VFO MHz]to select VFO mode
first, then push [BAND]to select the desired band.➥While pushing and holding [BAND], rotating [R-DIAL]also
selects frequency band.
Available frequency bands are different depending on ver-
sion. See the specification for details.
*Some frequency ranges are prohibited for the USA ver-
sion due to local regulation.
[R-DIAL]BAND
√MODE
ANLAFC TSQL
WFM76000
PSKIP
-DUP√
µ
MODE
ANLAFC TSQL
FM
146100
PSKIP
-DUP
001
0
√MODE
ANLAFC TSQL
WFM2ch
PSKIP
-DUP
TV
√MODE
ANLAFC TSQL
FM1
PSKIP
-DUP
WX
“µ  ” and memory channel 
 number appear.
• PreSet channel indication• TV channel indication
• Weather channel indication
  (USA version only) • Memory mode indicationPreSet channel number appears.
“TV” indication appears.
“WX” indication appears. 
						

							13
3
FREQUENCY AND CHANNEL SETTING 
• Available frequency bands
BAND
BAND
AM broadcast band HF band 50 MHz band
800 MHz band 400 MHz bandFM broadcast band
VHF air band
144 MHz band
300 MHz band 1200 MHz band 2400 MHz band
: Push
: Rotating         while pushing
Initial frequencies shown will differ according to version.
AM
MODE
AM
MODE
FM
MODE
WFM
MODE
AM
MODE
FM
MODE
AM
MODE
FM
MODE
FM
MODE
1620
50005100076000
118000
146010
370000 440000 800000
FM
MODE1295000
FM
MODE2425000 
						

							14
3
FREQUENCY AND CHANNEL SETTING 
3
■Setting a tuning stepThe tuning step can be selected for each frequency band in-
dependently, however, the tuning steps, 8.33 kHz and 9 kHz,
only appear when setting the tuning step for the VHF air band
and AM broadcast band, respectively. The following tuning
steps are available for the IC-R20.
•0.01 kHz • 0.1 kHz • 1.0 kHz • 5.0 kHz • 6.25 kHz
•8.33 kHz* • 9.0 kHz* • 10.0 kHz • 12.5 kHz • 15.0 kHz
•20.0 kHz • 25.0 kHz • 30.0 kHz • 50.0 kHz • 100.0 kHz
* Available for some frequency band only.D D
Tuning step selectionqPush [VFO MHz]to select VFO mode, if necessary.
wPush [BAND]to select the desired frequency band.•Or, while pushing and holding [BAND], rotate [R-DIAL]to select
the desired frequency band.ePush [9 TS]for 1 sec. to enter tuning step selecting condition.rRotate [R-DIAL]to select the desired tuning step.
tPush [9 TS]to return to VFO mode.
■Setting a frequencyD
D
Using the dialqPush [VFO MHz]to select VFO mode, if necessary.
wSelect the desired frequency band with [BAND].•Or, while pushing and holding [BAND], rotate [R-DIAL]to select
the desired frequency band.eRotate [R-DIAL]to select the desired frequency.•The frequency changes according to the preset tuning steps.
See the left section for setting the tuning step.
•Push [VFO MHz]for 1 sec. then rotate [R-DIAL]to change the
frequency in 1 MHz steps, or push for 1 sec. again then rotate
[R-DIAL]to change the frequency in 10 MHz steps. (Each push
for 1 sec. toggles 1 MHz or 10 MHz tuning steps.)
FM
MODE
146010
00
FM
MODE
146010
00
[R-DIAL] changes the fre-
quency according to the se-
lected tuning step.
While pushing [
VFO MHz
], 
[R-DIAL] changes the fre-
quency in 1 MHz steps (de-
fault).
[R-DIAL]BANDVFO
MHz
SETTS:5.0kHz√MODE
ANLAFC TSQL
FM
146010
PSKIP
-DUP
5 kHz tuning step [R-DIAL]
TS9BANDVFO
MHz 
						

							15
3
FREQUENCY AND CHANNEL SETTING 
D D
Using the keypadThe frequency can be directly set via numeral
keys.•When editing a frequency outside of the fre-
quency range, the previously displayed frequency
is automatically recalled after editing last digit.qPush [VFO MHz]to select VFO mode, if
necessary.wEnter the desired frequency via the keypad.•Direct input can be set until 1 kHz digit, rotate
[R-DIAL]to set below 1 kHz frequency after
set tuning steps, if necessary. (See the previ-
ous page for setting the tuning step.)
123
4560
789
LOCKAFC
DUALWATCHVFO
MHz
Pushing [VFO MHz]omits the entry of 100 kHz and below, when you want to
edit to these digits “0.” Push [DUALWATCH]to cancel the entry.
AM
MODE000010
AM
MODE000010
AM
MODE000884
AM
MODE000824
AM
MODE000820
FM
MODE
1000FM
MODE
12000FM
MODE126000
FM
MODE1260000
FM
MODE1260000
FM
MODE1260240
FM
MODE1260240
FM
MODE1260240
FM
MODE1260240
12
2
0
4
6
82
VFO
MHz0AFC
0AFC
0AFCLOCK
LOCK
• Editting to 0.820 MHz • Editting to 1260 MHz • Changing 100 kHz 
   and below.
Editting 
1260.000 MHz 
to 1260.240 MHz 
						

							16
3
FREQUENCY AND CHANNEL SETTING 
3
■Receive mode selectionReceive modes are determined by the physical properties of
the radio signals. The receiver has 6 receive modes: FM,
WFM, AM, LSB, USB and CW modes. The mode selection is
stored independently in each band and memory channels.
Typically, AM mode is used for the AM broadcast stations
(0.495–1.620 MHz) and VHF air band (118–135.995 MHz),
and WFM is used for FM broadcast stations (76–107.9 MHz).
➥Push [MODE SCAN]momentarily several times to select
the desired receive mode.
■Lock functionTo prevent accidental frequency changes and unnecessary
function access, use the lock function. 
➥Push [• LOCK]for 1 sec. to turn the lock function ON and
OFF.•“” appears while the lock function is activated.
•The squelch control and volume control can be used while the
lock function is in use with default setting. Either or both the
squelch control and volume control can also be locked in set
mode. (p. 49)
√MODE
ANLAFC TSQL
FM
146010
PSKIP
-DUP
DIAL.SEL SWEEP CENTER
T-SCAN SKIP M.N
TONE SET TS
ATTRF GAIN
IC Recorder
123
4560
789BANDDUALWATCH
MAIN/SUB
POWER
VFO
MHzMODE
SCANMR
S.MW
SCOPE
LOCK
RECAFC
“     ” appears while the 
lock function is in use.
LOCK
DIAL.SEL SWEEP CENTER
T-SCAN SKIP M.N
TONE SET TS
ATTRF GAIN
IC Recorder
123
4560
789BANDDUALWATCH
MAIN/SUB
POWER
VFO
MHzMODE
SCANMR
S.MW
SCOPE
LOCK
RECAFC
MODE
SCAN
WFM
MODE
AM
MODE
FM
MODE
76000 118000 146010
PSKIPPSKIPPSKIP
FM mode
AM mode
WFM mode 
						

							17
BASIC OPERATION
4■ReceivingMake sure charged battery pack (BP-206) or brand new al-
kaline batteries are installed (p. 8).
qPush [POWER]for 1 sec. to turn power ON.
wRotate [L-DIAL](or push [Y Y
]or [Z Z
]) to set the desired
audio level. 
•The frequency display shows the volume level while setting. See
the section at right for details.
eSet the receiving frequency. (p. 14)
rSet the squelch level. (p. 18)
•While pushing [SQL], rotate [R-DIAL].
•The first click of [R-DIAL]indicates the current squelch level.
•“LEVEL 1” is loose squelch and “LEVEL 9” is tight squelch.
•“AUTO” indicates automatic level adjustment with a noise pulse
count system.
•Push and hold [SQL]to open the squelch manually.
tWhen a signal is received:
•Squelch opens and audio is emitted.
•The S-meter shows the relative signal strength level.
■Setting audio volumeThe audio level can be adjusted through 39 levels.
➥Push and hold [SQL], rotate [L-DIAL](or p
ush [Y Y
]or [Z Z
])
to adjust the audio level. 
•While using 
[Y Y
]/[Z Z
]
, pushing and holding either key change the
audio level continuously.
•The display shows the volume level while setting.
√MODE
ANLAFC TSQL
FM
VOL
146010
PSKIP
-DUP√VOL√VOL
[L-DIAL]
Minimum setting
(no audio)
Maximum setting
SQL
√MODE
ANLAFC TSQL
FM
146 010
PSKIP
-DUP
ATT
q [POWER] e Set frequency
r Set squelch level
w Set audio levelw Set audio level
e Select band r Push for setting
    
the squelch
    
(Push to monitor)