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

Page 34

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

Contents IR20 May occur Some frequency bands are inhibited according to versionAuto write and 50 scan edge channels are included Equipment damage may occurPrecaution Operate this device under FCC regulationsSupplied Accessories Table of Contents Quick Reference Guide Batteries installationBattery pack installation PreparationsBelt clip Swivel belt clip OptionAntenna Third-party antennas may in- crease receiver performanceYour ﬁrst scanning Charging the batteryAbout default setting ExperienceBasic operation Adjusting audio levelAdjusting squelch level Turning on the receiverMemory programming Setting frequencyReceive mode selection Selecting a memory channelSelecting a scan edge channel B Programmed scan operationProgramming scan edges Writing a memory channel Selecting a scan edge channel aStarting scan Starting scan Select VFO modeCancelling scan Selecting a scanning typePanel Description Front, top and side panelsIRIGHT Dial R-DIAL EPOWER KEY PowerULEFT Dial L-DIAL QDUALWATCH/CLEAR KEY DualwatchVOLUME/DIAL KEY 1 DIAL.SEL Or 10 MHz tuning steps pMODE/SCAN KEY Mode Scan VFO/MHz KEY VFO MHzInputs 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 displayYAFC Indicator p RANL/NB Indicator pgsTLOCK Indicator p USKIP Indicators pBattery INSTALLATION/CHARGING Battery installationRegular charging Battery chargingBattery caution Charging cautionCP-18A/E fuse replacement Rapid charging with the BC-156VFO mode Frequency and Channel SettingMode selection Memory mode/PreSet*/TV*/Weather† channelsOperating band selection 2425 Available frequency bandsTuning step selection Setting a tuning stepSetting a frequency Using the dialFrequency can be directly set via numeral keys Using the keypadEditting MHz to 1260.240 MHz Receive mode selection Lock functionBasic Operation Setting audio volumeWhen a signal is received ReceivingMonitor function Squelch level settingPush and hold SQL to monitor the operating frequency Attenuator function RF gainDuplex operation SettingRotate R-DIALto select Duplex AFC function NB/ANL functionBand scope Select the sweep steps, if desiredDial function assignment Single band operationMain band selection Band exchange Operating bands table for dualwatch operationSetting audio volume Squelch level setting Lower band’s squelch adjustmentGeneral description Memory channel contentsMemory Channels Memory channel programmingMemory bank setting Push MR S.MW for 1 sec. to set the channel into the bankMemory bank selection Rotate R-DIALto select the bank channelProgramming memory/bank name Rotate R-DIALto select the desired characterAvailable 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 clearingErasing/transferring bank contents Full Scan p Scan OperationScan types FREQUENCY/MEMORY Skip Function pTo 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 DualwatchRecalling the stored frequencies Auto-memory write scanDuring auto-memory write scanning Clearing the stored frequenciesSkip channel/frequency setting Scan resume condition Scan pause timerPush Dualwatch to exit set mode SETScan 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 channel0Push 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 listDtcs polarity setting Tone scan Push 4 T-SCANfor 1 sec. to start the tone scanExpanded set mode ON/OFF SET ModeGeneral Expanded set mode items Set mode itemsGeneral set mode items Beep output level Priority watchKey-touch beep Display backlightingANL function Power saveNoise blanker AF ﬁlterAM antenna selection No accessible key is available, exceptPower and Lock FM antenna selectionDial speed acceleration Auto power OFFDefault Monitor key actionScan stop beep Scan pause timerScan resume timer Turns the scan stop beep function on and OFFDuplex direction Scope audio outputOffset frequency Sets the audio output function while scope operationDtcs polarity Tone frequencyDtcs code Available subaudible tone frequenciesLCD contrast LCD contrast can be adjusted through 15 levelsMemory bank link Turns weather alert function on and OFFCI-V baud rate CI-V addressCI-V transceive Antenna selection RPush Dualwatch to exit set modeOther Functions Selecting antennaWeather channel selection Turn the weather alert function OFF in set modeWeather channel operation Weather alert functionData cloning Cloning using a personal computerReceiver shows following indications Auto power-off function Cloning errorIC recorder Playing back recorded contentRecording a received audio Playback speed setting Recording set mode Quality settingREC Automatic recordingErasing recorded audio Same time, but cannot erase each track independentlyPartial reset Command table Control CommandData format Control Command CI-V compatible transceiverS.A. channels Frequency TableTV channels Ccir channelsZealand China channelsNew ChannelsTaiwan channels Indonesian channelsItalian channels FOT channelsVHF marine channels Weather channelsunit MHzChannels 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 TroubleshootingSpecifications GeneralOptions OptionsDriver Installation For Microsoft Windows XPDriver Installation Windows starts installing the USB driver After the installation is completed, click Finish 0Repeat step e to y2After 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 IR20Release Mode Scan to start scan Declaration Conformity We Icom Inc. Japan#07 France Kamiminami, Hirano-ku, Osaka 547-0003, Japan