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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.
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FOREWORD IMPORTANT Thank you for purchasing this Icom product. The IC-R20 COM- READ ALL INSTRUCTIONS carefully and completely MUNICATIONS RECEIVER is designed and built with Icom’s supe- before using the receiver. rior technology and craftsmanship. With proper care, this SAVE THIS INSTRUCTION MANUAL— This in- product should provide you with years of trouble-free operation. struction manual contains important operating instructions for We want to take a couple of moments of your time to thank you
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PRECAUTION NEVER expose the receiver to rain, snow or any liquids. RWARNING! NEVER operate the receiver with an The receiver may be damaged. earphone, headphones or other audio accessories at high volume levels. Hearing experts advise against continuous NEVER operate or touch the receiver with wet hands. This high volume operation. If you experience a ringing in your may result in an electric shock or damage the receiver. ears, reduce the volume level or discontinue use. NEVER solder the battery
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SUPPLIED ACCESSORIES OPERATING THEORY Electromagnetic radiation which has frequencies of qw e r 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 o
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1 TABLE OF CONTENTS 2 FOREWORD ................................................... i ■ RF gain................................................. 19 ■ Tone squelch frequency/DTCS code set- IMPORTANT ................................................... i ■ Duplex operation .................................. 20 ting........................................................ 46 3 EXPLICIT DEFINITIONS ................................ i ■ AFC function......................................... 21 ■ DTCS pola
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QUICK REFERENCE GUIDE ■ Preparations D Batteries installation D D Battery pack installation qRemove the battery cover from the receiver. q Remove the battery cover from the receiver. w Remove the supplied battery spacer for R6 (AA) size bat- tery use. e Install the Li-Ion battery pack (BP-206). • Be sure to observe the correct direction. • Charge Li-Ion battery pack (BP-206) before use. (Refer to p. IV for charging instructions.) wFor alkaline battery use, attach the supplied battery spacer. •Ba
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QUICK REFERENCE GUIDE D Belt clip w Clip the belt clip to your belt. Conveniently attaches to your belt. Attach the belt clip with the supplied screws using a phillips screwdriver. e Insert the receiver into the end of the clip as shown at right. D Swivel belt clip (Option) • Once the receiver is locked in The optional swivel belt clip (MB-86) is useful for easy place, it will swivel 360 degrees. attaching/detaching the receiver to/from the belt. q Attach the stopper with the supplied screws usi
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QUICK REFERENCE GUIDE D D Antenna Insert the supplied antenna into To remove: the antenna connector and r Turn the receiver upside down, and then lift to release the screw down the antenna as receiver from the belt clip as shown at upper right. shown at right. NEVER hold the antenna when carrying the receiver. ✔ For your information Third-party antennas may in- crease receiver performance. III
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QUICK REFERENCE GUIDE ■ Your first scanning D Charging the battery experience Now that you have your IC-R20 ready, you are probably ex- IC-R20 Optional CP-18A/E cited to start listening. We would like to take you through a Cigarette lighter cable few basic operation steps to make your first “Scanning Expe- with DC-DC converter rience” enjoyable. to [DC] to cigarette jack lighter socket D About default setting The frequency control ([R-DIAL]) function can be traded with AC adaptor volume control
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QUICK REFERENCE GUIDE 4. Tune the desired frequency D Basic operation The tuning dial will allow you to dial in the frequency you want 1. Turning ON the receiver to operate. Pages 9 and 15 will instruct you on how to set the ➥ Push [POWER] for 1 sec. to DUALWATCH MAIN/SUB POWER POWER tuning speed. turn the power ON. VFO MODE MR BAND MHz SCAN S.MW -DUP TSQL AFC SCOPE [Using the tuning dial] 123 MODE FM ANL Top AFC 456 0 qPush [BAND] several times 146010 789 LOCK to select the desired fre- PSKIP R
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QUICK REFERENCE GUIDE ■ Memory programming The IC-R20 has a total of 1250 memory channels (including [Using the keypad] 200 auto write channels and 50 scan edges) for storing often ➥ Enter the desired frequency used receive frequency, mode, etc. via the keypad. • Direct input can be set until 1 kHz digit, rotate [R-DIAL] to set 1. Setting frequency below 1 kHz frequency after set tuning steps, if necessary. (See p. 14 for setting the tuning step.) In VFO mode, set the desired receive frequency m
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QUICK REFERENCE GUIDE 3. Writing a memory channel ■ Programmed scan operation Push [MR S.MW] for 1 sec. until 25 pairs, 50 channels of memories are used for programmed DUALWATCH MAIN/SUB POWER 3 beeps sound. scan operation, that specify a scanning range. The pro- VFO MODE MR MR BAND • Scan edge channel “B” is automat- MHz SCAN S.MW S.MW grammed scan scans between “xxA” and “xxB” (xx=00 to 24) SCOPE ically selected when continuing to 123 frequencies. Therefore, before operating the programmed AFC
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QUICK REFERENCE GUIDE 3. Starting scan D D Starting scan Release [MODE SCAN] to start the scan. 1. Select VFO mode. • Rotate [R-DIAL] to change the scanning direction. Push [VFO MHz] to select the VFO mode for full, band and • During full/band scan • During programmed scan programmed scan operation. -DUP TSQL AFC -DUP TSQL AFC • Select memory mode by pushing [MR S.MW] for memory or bank MODE MODE FM FM ANL MODE MODE FM FM ANL scan. 140 8000 888 148 0888 000 PS PSKI KIP PS PSKI KIP √ √ P01 2. Se
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PANEL DESCRIPTION 1 ■ Front, top and side panels i qANTENNA CONNECTOR (p. II) BNC connector: Connects the supplied antenna. u wSQUELCH KEY [SQL] (p. 18) q ➥ Push and hold to temporarily open the squelch and monitor the operating frequency. ➥ While pushing this key, rotate the tuning dial* to adjust the squelch level. y w eUP/DOWN KEYS [Y Y]/[Z Z] t Adjust audio volume level.* (p. 17) rUSB JACK [USB] r Connects to a PC using an optional OPC-1382 CLONING CABLE for cloning. Cloning allows you to qu
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1 PANEL DESCRIPTION uLEFT DIAL [L-DIAL] qDUALWATCH/CLEAR KEY [DUALWATCH] 1 ➥ During single band operation, rotate to adjust audio vol- ➥ Push for 1 sec. to toggle between single band DUALWATCH ume level.* (p. 17) and dualwatch operation. (p. 24) ➥ During dualwatch operation, activates as the tuning dial ➥ Clears numeric key input. (p. 15) for upper side on the display.* ➥ Returns to previous operating condition while setting frequency or memory channel, or while iRIGHT DIAL [R-DIAL] ➥ Rotate to
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1 PANEL DESCRIPTION t VFO/MHz KEY [VFO MHz] i VOLUME/DIAL KEY [1 DIAL.SEL] DIAL.SEL ➥ Push to select VFO mode. (p. 11) ➥ Inputs digit ‘1’ for frequency input, memory VFO MHz ➥ Push for 1 sec. to toggle between the 1 MHz channel selection, etc. or 10 MHz tuning steps (p. 14) ➥ Push for 1 sec. to trade the volume control ([L-DIAL], [Y Y]/[Z Z]) and tuning control ([R- y MODE/SCAN KEY [MODE SCAN] DIAL]) functions. (p. 23) ➥ Push to select the operating mode (FM, WFM, MODE •“√ √ ” appears when the n
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1 PANEL DESCRIPTION ! TONE SCAN KEY [4 T-SCAN] ! AFC KEY [0 AFC] 1 T SCAN ➥ Inputs digit ‘4’ for frequency input, memory ➥ Inputs digit ‘0’ for frequency input, memory AFC channel selection, etc. channel selection, etc. ➥ Push for 1 sec. to start a tone scan. (p. 48) ➥ Push for 1 sec. to turn the AFC (Automatic Frequency Control) function ON and OFF. ! FREQUENCY SKIP KEY [5 SKIP] (p. 21) SKIP ➥ Inputs digit ‘5’ for frequency input, memory channel selection, etc. ! TONE SQUELCH KEY [7 TONE] TONE
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1 PANEL DESCRIPTION ! TUNING STEP KEY [9 TS] @ STOP/PLAY [■ ≈ ≈] TS ➥ Inputs digit ‘9’ for frequency input, memory ➥ Push to start the recorded audio. (p. 64) channel selection, etc. ➥ Push to stop the recording or playing audio. ➥ Push for 1 sec. to select the tuning step. (p. 64) (p. 14) ➥ Push for 1 sec. to enter the play speed set mode. Push to select the item after selecting ! LOCK KEY [• LOCK] with [R-DIAL]. (p. 65) ➥ Inputs MHz digit for frequency input. (p. 15) LOCK ➥ Push for 1 sec. to
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1 PANEL DESCRIPTION ■ Function display 1 q w e r t y ! w e u -DUPTSQL PS -DUP TSQL TSQL AFC AFC ! PRIO ! MODE FM ANL ! 145000 000 i ! FM t 145000 w e u ! M:Amateur2 PSKIP u q ! o ! √ PRI RIOµ 000 000 i ! -DUPTSQL PS ! PRIO ATT ! 433000 000 i FM ! o ! ! ! o ! qBATTERY INDICATOR wDUPLEX INDICATORS (p. 20) ➥“” appears when the installed batteries have “+DUP” appears when plus semi-duplex, “–DUP” appears ample capacity. when minus semi-duplex (repeater) operation is selected. • They do not appear wh
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1 PANEL DESCRIPTION rANL/NB INDICATOR (pgs. 21, 52) oSIGNAL STRENGTH INDICATOR ➥ “ANL” appears when the ANL (Automatic Noise Limitter) Shows the receiving signals relative to signal strength. function is in use. The ANL function is available only for !PRIORITY WATCH INDICATOR (p. 42) AM mode. Appears when priority watch is in use. ➥ “NB” appears when the noise blanker function is in use. The noise blanker function is available while in !ATTENUATOR INDICATOR (p. 19) LSB/USB/CW modes. Appears when
