Icom Ic_r20 Communications Reciever Instruction Manual

INSTRUCTION MANUAL
iR20COMMUNICATIONS RECEIVER
This device complies with Part 15 of the FCC rules. Operation is sub-
ject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
WARNING: MODIFICATION OF THIS DEVICE TO RECEIVE CEL-
LULAR RADIO TELEPHONE SERVICE SIGNALS IS PROHIBITED
UNDER FCC RULES AND FEDERAL LAW.  

i
FOREWORDThank you for purchasing this Icom product. The IC-R20 
COM
-
MUNICATIONS RECEIVER
is designed and built with Icom’s supe-
rior technology and craftsmanship. With proper care, this
product should provide you with years of trouble-free operation.
We want to take a couple of moments of your time to thank you
for making your IC-R20 your radio of choice, and hope you
agree with Icom’s philosophy of “technology first.” Many hours of
research and development went into the design of your IC-R20.D D...

RWARNING! NEVER
operate the receiver with an
earphone, headphones or other audio accessories at high
volume levels. Hearing experts advise against continuous
high volume operation. If you experience a ringing in your
ears, reduce the volume level or discontinue use.
RWARNING! NEVER
connect the receiver directly to
an AC outlet. This may pose a fire hazard or result in an elec-
tric shock.
RWARNING! NEVER
operate the receiver while dri-
ving a vehicle. Safety driving requires your full attention—any-
thing...

iii
SUPPLIED ACCESSORIESqAntenna ………………………………………………………1
wBelt clip (MB-98) …………………………………………1 set
eBattery spacer ………………………………………………1
rHand strap  …………………………………………………1
tBattery pack* (BP-206) ……………………………………1
yAC adaptor*(BC-149A/D)  …………………………………1(The shape of the BC-149A and BC-149D are different.)
*Not supplied with some versions.
OPERATING THEORYElectromagnetic radiation which has frequencies of
20,000 Hz (20 kHz*) and above is called radio frequency (RF)
energy because it is useful in radio...

iv
TABLE OF CONTENTS
123456789101112131415
FOREWORD ................................................... i
IMPORTANT ................................................... i
EXPLICIT DEFINITIONS ................................ i
PRECAUTION ................................................ ii
SUPPLIED ACCESSORIES .......................... iii
OPERATING THEORY .................................. iii
OPERATING NOTES .................................... iii
TABLE OF CONTENTS ................................ iv...

I
QUICK REFERENCE GUIDE
■PreparationsDBatteries installationqRemove 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-...

II
QUICK REFERENCE GUIDE
DBelt clip
Conveniently attaches to your belt.
Attach the belt clip with the supplied screws using a phillips
screwdriver.DSwivel belt clip (Option)The optional swivel belt clip (MB-86) is useful for easy
attaching/detaching the receiver to/from the belt.
qAttach the stopper with the supplied screws using a phillips
screwdriver.wClip the belt clip to your belt.
eInsert the receiver into the end of
the clip as shown at right.
•Once the receiver is locked in
place, it will swivel...

III
QUICK REFERENCE GUIDE
To remove:rTurn the receiver upside down, and then lift to release the
receiver from the belt clip as shown at upper right.
D D
AntennaInsert the supplied antenna into
the antenna connector and
screw down the antenna as
shown at right.
NEVERhold the antenna when
carrying the receiver.
✔For your information
Third-party antennas may in-
crease receiver performance. 

IV
QUICK REFERENCE GUIDE
DCharging the battery
qInstall the battery pack (BP-206).
wPlug the AC adaptor into an AC outlet.
eTurn OFF the receiver, then insert the adaptor plug into the
[DC] jack of the receiver.
R R
WARNING!:
NEVERattempt to charge any other batteries. Because
the IC-R20 can charge the BP-206 only.
Keepthe jack cover attached when jack is not in use to pro-
tect the connectors from dust and moisture.
■Your first scanning
experienceNow that you have your IC-R20 ready, you are probably ex-...

V
QUICK REFERENCE GUIDE
DBasic operation1. Turning ON the receiver➥Push [POWER]for 1 sec. to
turn the power ON.2. Adjusting audio level➥Rotate [L-DIAL](or push [Y Y
]/
[Z Z
]) to set the desired audio
level.3. Adjusting squelch level➥While pushing [SQL], rotate [R-
DIAL]to set the squelch level.
4. Tune the desired frequencyThe tuning dial will allow you to dial in the frequency you want
to operate. Pages 9 and 15 will instruct you on how to set the
tuning speed.
[Using the tuning dial]
qPush...