IC-R20.pdf

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INSTRUCTION MANUAL
COMMUNICATIONS RECEIVER
iR20
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.
FOREWORD
Thank 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.
IMPORTANT
READ ALL INSTRUCTIONS
carefully and completely
before using the receiver.
SAVE THIS INSTRUCTION MANUAL—
This in-
struction manual contains important operating instructions for
the IC-R20.
EXPLICIT DEFINITIONS
DEFINITION
Personal injury, fire hazard or electric shock
R
WARNING!
may occur.
CAUTION
NOTE
Equipment damage may occur.
Recommended for optimum use. No risk of
personal injury, fire or electric shock.
WORD
D
FEATURES
❍
Covers 0.150–3304.999 MHz* wide
frequency range
*Some frequency bands are inhibited according to version
❍
External power supply operation
❍
1250 memory channels* with 26 banks
available
*200 auto write and 50 scan edge channels are included.
❍
Built-in bar-antenna
❍
Dualwatch operation
i
Icom, Icom Inc. and the
logo are registered trademarks of Icom
Incorporated (Japan) in the United States, the United Kingdom, Ger-
many, France, Spain, Russia and/or other countries.
PRECAUTION
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.
NEVER
expose the receiver to rain, snow or any liquids.
The receiver may be damaged.
NEVER
operate or touch the receiver with wet hands. This
may result in an electric shock or damage the receiver.
RWARNING!
NEVER
connect the receiver to an AC
outlet. This may pose a fire hazard or result in an electric
shock.
NEVER
solder the battery cell. This may damage the bat-
tery.
AVOID
using or placing the receiver in direct sunlight or in
areas with temperatures below –10°C (+14˚F) or above
+60°C (+140˚F).
RWARNING!
NEVER
operate the receiver while dri-
ving a vehicle. Safety driving requires your full attention—any-
thing less may result in an accident.
AVOID
the use of chemical agents such as benzine or al-
cohol in cleaning, as they can damage the receiver’s sur-
faces.
Even when the receiver power is OFF, a slight current still
flows in the circuits. Remove the battery pack or batteries
from the receiver while not using it for a long time. Otherwise,
the installed the battery pack or batteries will become ex-
hausted, and will need to be recharged.
RWARNING!
NEVER
throw a battery cell or battery
pack into a fire since as internal battery gas can cause an ex-
plosion.
RWARNING!
NEVER
disassemble the battery pack.
If the battery cell’s internal material (electrolyte liquid) gets
into your eyes, wash your eyes with water and obtain treat-
ment from an eye doctor immediately.
RESPECT
other people’s privacy. Information overheard
but not intended for you cannot lawfully be used in any way.
For U.S.A. only
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.
ii
NEVER
connect the receiver to a power source of more
than 6 V DC directly. This will damage the receiver.
NEVER
connect the receiver to a power source using re-
verse polarity. This will damage the receiver.
SUPPLIED ACCESSORIES
q
w
e
r
OPERATING THEORY
Electromagnetic radiation which has frequencies of
20,000 Hz (20 kHz*) and above is called radio frequency (RF)
energy because it is useful in radio transmissions. The IC-
R20 receives RF energy from 0.150 MHz* to 3304.999 MHz
and converts it into audio frequency (AF) energy which in turn
actuates a loudspeaker to create sound waves. AF energy is
in the range of 20 to 20,000 Hz.
*kHz is an abbreviation of kilohertz or 1000 hertz, MHz is abbreviation
of megahertz or 1,000,000 hertz, where hertz is a unit of frequency.
t
y
OPERATING NOTES
q
Antenna (FA-B04RE) ………………………………………1
w
Belt clip (MB-98) …………………………………………1 set
e
Battery spacer ………………………………………………1
r
Hand strap …………………………………………………1
t
Battery 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.
The IC-R20 may receive its own oscillated frequency, result-
ing in no reception or only noise reception, on some frequen-
cies.
The IC-R20 may receive interference from extremely strong
signals on different frequencies or when using an external
high-gain antenna.
iii
TABLE OF CONTENTS
FOREWORD .................................................. i
IMPORTANT .................................................. i
EXPLICIT DEFINITIONS ................................ i
PRECAUTION ............................................... ii
SUPPLIED ACCESSORIES ......................... iii
OPERATING THEORY ................................. iii
OPERATING NOTES ................................... iii
TABLE OF CONTENTS ................................ iv
QUICK REFERENCE GUIDE .................... I–II
I
Preparations ........................................... I
1 PANEL DESCRIPTION ........................ 1–7
I
Front, top and side panels .................... 1
I
Function display .................................... 6
2 BATTERY INSTALLATION/CHARGING .. 8–10
I
Battery installation ................................. 8
I
Caution .................................................. 9
I
Battery charging .................................... 9
3 FREQUENCY AND CHANNEL SETTING
.......................................................... 11–16
I
Mode selection..................................... 11
I
Operating band selection..................... 12
I
Setting a tuning step............................ 14
I
Setting a frequency.............................. 14
I
Receive mode selection ...................... 16
I
Lock function ....................................... 16
4 BASIC OPERATION ........................ 17–23
I
Receiving............................................. 17
I
Setting audio volume ........................... 17
I
Squelch level setting............................ 18
I
Monitor function ................................... 18
I
Attenuator function .............................. 19
I
RF gain ................................................ 19
I
Duplex operation ................................. 20
I
AFC function........................................ 21
I
NB/ANL functions ................................ 21
I
Band scope.......................................... 22
I
[DIAL] function assignment.................. 23
DUALWATCH OPERATION ............ 24–25
I
Setting audio volume ........................... 24
I
Squelch level setting............................ 24
I
Main band selection............................. 25
I
Band exchange.................................... 25
MEMORY CHANNELS ..................... 26–33
I
General description ............................. 26
I
Memory channel programming............ 26
I
Memory bank setting ........................... 27
I
Memory bank selection........................ 28
I
Programming memory/bank name ...... 29
I
Selecting memory/bank name indication.... 30
I
Copying memory contents................... 31
I
Memory clearing .................................. 32
I
Erasing/transferring bank contents...... 33
SCAN OPERATION ......................... 34–41
I
Scan types........................................... 34
I
Full/band/programmed scan................ 35
I
Scan edges programming ................... 36
I
Memory/bank/all bank scan................. 37
I
Auto-memory write scan...................... 38
I
Skip channel/frequency setting............ 39
I
Scan resume condition ........................ 40
PRIORITY WATCH .......................... 42–44
I
Priority watch types ............................. 42
I
Priority watch operation ....................... 43
COMFORTABLE RECEIVING.......... 45–48
I
Tone/DTCS squelch operation............. 45
I
Tone squelch frequency/DTCS code set-
ting....................................................... 46
I
DTCS polarity setting........................... 47
I
Tone scan ............................................ 48
10 SET MODE ...................................... 49–59
I
General................................................ 49
I
Set mode items.................................... 50
11 OTHER FUNCTIONS ....................... 60–67
I
Antenna selection ................................ 60
I
Weather channel operation ................. 61
I
Data cloning ........................................ 62
I
Auto power-off function........................ 63
I
IC recorder........................................... 64
I
Partial reset ......................................... 67
I
All reset ............................................... 68
12 CONTROL COMMAND ................... 68–69
I
General................................................ 68
I
Data format.......................................... 68
I
Command table ................................... 68
13 FREQUENCY TABLE ...................... 70–77
I
TV channels......................................... 70
I
VHF marine channels .......................... 73
I
Weather channels................................ 73
I
Other communications in the USA ...... 74
I
Other communications—other countries.... 76
14 MAINTENANCE ..................................... 78
I
Troubleshooting ................................... 78
15 SPECIFICATIONS ................................. 79
16 OPTIONS ............................................... 80
17 DRIVER INSTALLATION ....................... 81
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6
7
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2
3
4
5
6
7
8
9
10
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12
13
14
15
16
17
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9
iv

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