387SCAN OPERATION Auto-memory write scanThis scan is useful for searching a specified frequency rangeand automatically storing busy frequencies into memorychannels. The auto-memory write scan is performed any VFOscan types (ALL, BAND, PROG).q Select VFO mode with [VFO MHz].wPush and hold [MODE SCAN] to enter scanning type se-lection condition.e Rotate [R-DIAL] to select the desired scanning type.• “ALL” for full scan; “BAND” for band scan, “PROG-xx” for pro-grammed scan (xx= 0 to 24; programmed scan edges numbersonly displayed)r Release [MODE SCAN] to start the scan.tPush [MR S.MW] to turn the automatic memory write func-tion ON and OFF.• “μ ” indicator blinks.yPush [DUALWATCH] to stop the scan.DD During auto-memory write scanning:• When signal is received, scan pauses and the frequency isstored into auto-memory write channel group (å 000–199).- 2 short beeps sound when stored.• Scan resumes after frequency storing.• When all channels are stored, the scan is canceled auto-matically and 1 long beep sounds.DD Recalling the stored frequencies:qPush [MR S.MW] several times to select the auto-memorywrite channel group.• “ å ” appears.e Rotate [R-DIAL] to select the desired channel.DD Clearing the stored frequencies:q Select the auto-memory write channel group.wPush [5 SKIP] for 1 sec. to clear the all channels contents.• 1 short and 1 long beeps sound.NOTE: The auto-memory write channel contents CANNOTbe cleared by an independent channel. Thus it is good ideato copy the contents into regular memory channel.√ åMODE ANLAFCTSQLFM439 875PSKIP-DUP001“ å” appears when auto memorywrite channel group is selected.√ μMODE ANLAFCTSQLFM148 800PSKIP-DUP001• During auto memorywrite scan“ ” indicator blinks duringauto memory write scan.[R-DIAL]MODESCANMRS.MWμ12345678910111213141516

dualwatch operation

supplied accessories

quick reference guide

charging the battery

I Front, top and side panels

panel description

I Function display

I Battery installation

I Caution

I Mode selection

I Operating band selection

I Setting a tuning step

I Receive mode selection

I Receiving

I Squelch level setting

I Attenuator function

I Duplex operation

I AFC function

I Band scope

I [DIAL] function assignment

I Setting audio volume

I Main band selection

I General description

I Memory bank setting

I Memory bank selection

I Programming memory/bank name

I Selecting memory/bank name indication

I Copying memory contents

I Memory clearing

I Erasing/transferring bank contents

I Scan types

I Full/band/programmed scan

I Scan edges programming

I Memory/bank/all bank scan

I Auto-memory write scan

I Skip channel/frequency setting

I Scan resume condition

scan operation

I Priority watch types

I Priority watch operation

I Tone/DTCS squelch operation

ting

I DTCS polarity setting

tone scan

set mode

I Set mode items

I Antenna selection

I Weather channel operation

i data cloning

I Auto power-off function

other functions

I Partial reset

I General

I TV channels

frequency table

I Weather channels

other communications in the usa

I Other communications— other countries

MAINTENANCE

SPECIFICATIONS

Icom IC-R20 Instruction Manual

specifications

IC-R20

frequency range

belt clip

basic operation

programmed scan operation

Front, top and side panels

Function display

Battery installation

Caution

Mode selection

Operating band selection

Setting a tuning step

frequency and channel setting

Receive mode selection

Setting audio volume

Squelch level setting

Attenuator function

Duplex operation

AFC function

Band scope

DIAL] function assignment

Band exchange

Memory channel programming

Memory bank setting

Memory bank selection

Programming memory/bank name

Selecting memory/bank name indication

Copying memory contents

Memory clearing

Erasing/transferring bank contents

Scan types

Full/band/programmed scan

Scan edges programming

Memory/bank/all bank scan

Auto-memory write scan

Skip channel/frequency setting

Scan resume condition

Priority watch types

Priority watch operation

priority watch

Tone/DTCS squelch operation

dtcs polarity setting

General

Set mode items

Antenna selection

Weather channel operation

Data cloning

Partial reset

Data format

control command

VHF marine channels

Other communications in the USA

troubleshooting

OPTIONS

driver installation

POCKET GUIDE

service manual

bottom view

logic unit

disassembly instructions

receiver circuits

pll circuits

other circuits

power supply circuits

software adjustments

main unit

explanatory notes

disassembly information

bc-156 voltage diagram

bc-156 board layouts

parts list

PARTS LIST

BOARD LAYOUTS

VOLTAGE DIAGRAM

UNIT LAYOUTS