AFC function, NB/ANL function | Icom IC-R20 guide

4 BASIC OPERATION

■AFC function

The AFC (Automatic Frequency Control) function tunes the displayed frequency automatically when an off-center fre- quency is received. It activates in FM/WFM modes only with single band operation.

➥Push [0 AFC] to toggle the AFC function ON and OFF.

• “AFC” appears when the AFC function is in use.

				“AFC” appears while the
DUALWATCH	MAIN/SUB		POWER	AFC function is in use.
BAND	VFO	MODE	MR
BAND	MHz	SCAN	S.MW
	MHz	SCAN	S.MW
DIAL.SEL	SWEEP	CENTER		-DUP TSQL AFC
1	2	3	SCOPE	MODE FM ANL

4	5	6	0 AFC	0 AFC	1260 000
T-SCAN	SKIP	M.N

	TONE	SET	TS		PSKIP
	7	8	9
				LOCK	√
	ATT	RF GAIN	IC Recorder

REC

ATT

“ ” or “ ” appears when

an off-frequency is received.

NOTE: The AFC function is not available during dualwatch operation.

■NB/ANL function

The NB (noise blanker) function removes pulse-type noise when USB, LSB or CW mode is selected. The ANL (Auto- matic Noise Limitter) function reduces noise components when AM mode is selected.

“NB” appears while the			“ANL” appears while the
NB function is in use.			ANL function is in use.
-DUP TSQL		AFC
					-DUP TSQL AFC
MODE USB NB			MODE AM ANL
145 100			51 100

PSKIP	PSKIP
√	√

See page 22 for setting details.

NOTE: No display indication appears during dualwatch op-

eration, but both functions are active while in specific modes.

21

Image 34

Icom IC-R20 instruction manual AFC function, NB/ANL function

Contents

IR20 May occur Some frequency bands are inhibited according to versionAuto write and 50 scan edge channels are included Equipment damage may occur Precaution Operate this device under FCC regulations Supplied Accessories Table of Contents Quick Reference Guide Batteries installationBattery pack installation Preparations Belt clip Swivel belt clip Option Antenna Third-party antennas may in- crease receiver performance Your ﬁrst scanning Charging the batteryAbout default setting Experience Basic operation Adjusting audio levelAdjusting squelch level Turning on the receiver Memory programming Setting frequencyReceive mode selection Selecting a memory channel Selecting a scan edge channel B Programmed scan operationProgramming scan edges Writing a memory channel Selecting a scan edge channel a Starting scan Starting scan Select VFO modeCancelling scan Selecting a scanning type Panel Description Front, top and side panels IRIGHT Dial R-DIAL EPOWER KEY PowerULEFT Dial L-DIAL QDUALWATCH/CLEAR KEY Dualwatch VOLUME/DIAL KEY 1 DIAL.SEL Or 10 MHz tuning steps pMODE/SCAN KEY Mode Scan VFO/MHz KEY VFO MHz Inputs digit ‘0’ for frequency input, memory Push for 1 sec. to enter the set modeInputs digit ‘5’ for frequency input, memory Inputs digit ‘8’ for frequency input, memory @2STOP/PLAY ≈ ESIGNAL Squelch Indicators QBATTERY IndicatorWDUPLEX Indicators p Function display YAFC Indicator p RANL/NB Indicator pgsTLOCK Indicator p USKIP Indicators p Battery INSTALLATION/CHARGING Battery installation Regular charging Battery chargingBattery caution Charging caution CP-18A/E fuse replacement Rapid charging with the BC-156 VFO mode Frequency and Channel SettingMode selection Memory mode/PreSet*/TV*/Weather† channels Operating band selection 2425 Available frequency bands Tuning step selection Setting a tuning stepSetting a frequency Using the dial Frequency can be directly set via numeral keys Using the keypadEditting MHz to 1260.240 MHz Receive mode selection Lock function Basic Operation Setting audio volumeWhen a signal is received Receiving Monitor function Squelch level settingPush and hold SQL to monitor the operating frequency Attenuator function RF gain Duplex operation SettingRotate R-DIALto select Duplex AFC function NB/ANL function Band scope Select the sweep steps, if desired Dial function assignment Single band operation Main band selection Band exchange Operating bands table for dualwatch operation Setting audio volume Squelch level setting Lower band’s squelch adjustment General description Memory channel contentsMemory Channels Memory channel programming Memory bank setting Push MR S.MW for 1 sec. to set the channel into the bank Memory bank selection Rotate R-DIALto select the bank channel Programming memory/bank name Rotate R-DIALto select the desired character Available characters Selecting memory/bank name IndicationDication type from bank name or memory name Copying memory contents Push MR S.MW for 1 sec. to clear the contents Memory clearing Erasing/transferring bank contents Full Scan p Scan OperationScan types FREQUENCY/MEMORY Skip Function p To start the scan, release Mode Scan Select VFO mode with VFO MHzFull/band/programmed scan Scan edges programming Memory/bank/all bank scan Select memory mode with MR S.MWRelease Mode Scan to start the selected scan To stop the scan, push Dualwatch Recalling the stored frequencies Auto-memory write scanDuring auto-memory write scanning Clearing the stored frequencies Skip channel/frequency setting Scan resume condition Scan pause timerPush Dualwatch to exit set mode SET Scan resume timer Priority watch types Priority WatchAbout priority beep function Priority watch operation Push Dualwatch to exit set mode and start the watchPush Dualwatch to cancel the watch Select the desired memory channel 0Push Dualwatch to cancel the watch and scan VFO scan watch qSelect memory modeWhile scanning memory/bank channels Tone/DTCS squelch operation Comfortable ReceivingPush Dualwatch to stop the beeps and blinking man- ually Push 8 SET Tone squelch frequency/DTCS code settingAvailable Dtcs code list Available tone frequency list Dtcs polarity setting Tone scan Push 4 T-SCANfor 1 sec. to start the tone scan Expanded set mode ON/OFF SET ModeGeneral Expanded set mode items Set mode itemsGeneral set mode items Beep output level Priority watchKey-touch beep Display backlighting ANL function Power saveNoise blanker AF ﬁlter AM antenna selection No accessible key is available, exceptPower and Lock FM antenna selection Dial speed acceleration Auto power OFFDefault Monitor key action Scan stop beep Scan pause timerScan resume timer Turns the scan stop beep function on and OFF Duplex direction Scope audio outputOffset frequency Sets the audio output function while scope operation Dtcs polarity Tone frequencyDtcs code Available subaudible tone frequencies LCD contrast LCD contrast can be adjusted through 15 levelsMemory bank link Turns weather alert function on and OFF CI-V baud rate CI-V addressCI-V transceive Antenna selection RPush Dualwatch to exit set modeOther Functions Selecting antenna Weather channel selection Turn the weather alert function OFF in set modeWeather channel operation Weather alert function Data cloning Cloning using a personal computerReceiver shows following indications Auto power-off function Cloning error IC recorder Playing back recorded contentRecording a received audio Playback speed setting Recording set mode Quality setting REC Automatic recordingErasing recorded audio Same time, but cannot erase each track independently Partial reset Command table Control CommandData format Control Command CI-V compatible transceiver S.A. channels Frequency TableTV channels Ccir channels Zealand China channelsNew Channels Taiwan channels Indonesian channelsItalian channels FOT channels VHF marine channels Weather channelsunit MHz Channels Murs channels Other communications in the USAHF CB Citizens Band channels General aviation frequencies Wireless MicrophonesCable TV IRC Other communications- other countries LPD Low Power Device channels Unit MHzPMR446 channels unit MHz UHF C.R.S Citizen Radio Service channels Maintenance Troubleshooting Specifications General Options Options Driver Installation For Microsoft Windows XP Driver Installation Windows starts installing the USB driver After the installation is completed, click Finish 0Repeat step e to y 2After clicking Finish, the dialog appears as below For Microsoft WindowsFound New Hardware Wizard will come up as below. Click Next Select Click Driver Installation For Microsoft Windows 98/98SE/Me Select Click COM port conﬁrmation Click the Device Manager Pocket Guide IR20 Release Mode Scan to start scan Declaration Conformity We Icom Inc. Japan #07 France Kamiminami, Hirano-ku, Osaka 547-0003, Japan