Icom IC-R20 instruction manual Squelch level setting, Monitor function

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■Squelch level setting

The squelch circuit mutes the received audio signal depend- ing on the signal strength. The receiver has 9 squelch levels, a continuously open setting and an automatic squelch setting.

➥While pushing and holding [SQL], rotate [R-DIAL]to se- lect the squelch level.

•“LEVEL 1” is loose squelch and “LEVEL 9” is tight squelch.

•“AUTO” indicates automatic level adjustment with a noise pulse count system.

•“OPEN” indicates continuously open setting.

[R-DIAL]			-DUP TSQL AFC
[R-DIAL]			-DUP TSQL AFC
	MODE FM ANL
	146 010
SQL						PSKIP


		√
		√
	SQUELCH:AUTO
		Automatic squelch

-DUP TSQL AFC

MODE FM ANL

146 010

PSKIP

√

SQUELCH:LEVEL9

Maximum level

BASIC OPERATION 4

■Monitor function

This function is used to listen to weak signals without disturb- ing the squelch setting or to open the squelch manually even when mute functions such as the tone squelch are in use.

4

➥Push and hold [SQL] to monitor the operating frequency.

•The 1st segment of the S-meter blinks.

-DUP TSQL AFC

MODE FM ANL

146 010

PSKIP

SQL√

The 1st segment blinks

The [SQL] key can be set to ‘sticky’ operation in expanded set mode. See page 54 for details.

18

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Contents IR20 Equipment damage may occur Some frequency bands are inhibited according to versionAuto write and 50 scan edge channels are included May occurOperate this device under FCC regulations PrecautionSupplied Accessories Table of Contents Preparations Batteries installationBattery pack installation Quick Reference GuideSwivel belt clip Option Belt clipThird-party antennas may in- crease receiver performance AntennaExperience Charging the batteryAbout default setting Your ﬁrst scanningTurning on the receiver Adjusting audio levelAdjusting squelch level Basic operationSelecting a memory channel Setting frequencyReceive mode selection Memory programmingSelecting a scan edge channel a Programmed scan operationProgramming scan edges Writing a memory channel Selecting a scan edge channel BSelecting a scanning type Starting scan Select VFO modeCancelling scan Starting scanFront, top and side panels Panel DescriptionQDUALWATCH/CLEAR KEY Dualwatch EPOWER KEY PowerULEFT Dial L-DIAL IRIGHT Dial R-DIALVFO/MHz KEY VFO MHz Or 10 MHz tuning steps pMODE/SCAN KEY Mode Scan VOLUME/DIAL KEY 1 DIAL.SELInputs digit ‘8’ for frequency input, memory Push for 1 sec. to enter the set modeInputs digit ‘5’ for frequency input, memory Inputs digit ‘0’ for frequency input, memory@2STOP/PLAY ≈ Function display QBATTERY IndicatorWDUPLEX Indicators p ESIGNAL Squelch IndicatorsUSKIP Indicators p RANL/NB Indicator pgsTLOCK Indicator p YAFC Indicator pBattery installation Battery INSTALLATION/CHARGINGCharging caution Battery chargingBattery caution Regular chargingRapid charging with the BC-156 CP-18A/E fuse replacementMemory mode/PreSet*/TV*/Weather† channels Frequency and Channel SettingMode selection VFO modeOperating band selection Available frequency bands 2425Using the dial Setting a tuning stepSetting a frequency Tuning step selectionFrequency can be directly set via numeral keys Using the keypadEditting MHz to 1260.240 MHz Lock function Receive mode selectionReceiving Setting audio volumeWhen a signal is received Basic OperationMonitor function Squelch level settingPush and hold SQL to monitor the operating frequency RF gain Attenuator functionDuplex operation SettingRotate R-DIALto select Duplex NB/ANL function AFC functionSelect the sweep steps, if desired Band scopeSingle band operation Dial function assignmentOperating bands table for dualwatch operation Main band selection Band exchangeLower band’s squelch adjustment Setting audio volume Squelch level settingMemory channel programming Memory channel contentsMemory Channels General descriptionPush MR S.MW for 1 sec. to set the channel into the bank Memory bank settingRotate R-DIALto select the bank channel Memory bank selectionRotate R-DIALto select the desired character Programming memory/bank nameAvailable characters Selecting memory/bank name IndicationDication type from bank name or memory name Copying memory contents Memory clearing Push MR S.MW for 1 sec. to clear the contentsErasing/transferring bank contents FREQUENCY/MEMORY Skip Function p Scan OperationScan types Full Scan pTo start the scan, release Mode Scan Select VFO mode with VFO MHzFull/band/programmed scan Scan edges programming To stop the scan, push Dualwatch Select memory mode with MR S.MWRelease Mode Scan to start the selected scan Memory/bank/all bank scanClearing the stored frequencies Auto-memory write scanDuring auto-memory write scanning Recalling the stored frequenciesSkip channel/frequency setting SET Scan pause timerPush Dualwatch to exit set mode Scan resume conditionScan resume timer Priority watch types Priority WatchAbout priority beep function Select the desired memory channel Push Dualwatch to exit set mode and start the watchPush Dualwatch to cancel the watch Priority watch operation0Push 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 Available tone frequency list Tone squelch frequency/DTCS code settingAvailable Dtcs code list Push 8 SETDtcs polarity setting Push 4 T-SCANfor 1 sec. to start the tone scan Tone scanExpanded set mode ON/OFF SET ModeGeneral Expanded set mode items Set mode itemsGeneral set mode items Display backlighting Priority watchKey-touch beep Beep output levelAF ﬁlter Power saveNoise blanker ANL functionFM antenna selection No accessible key is available, exceptPower and Lock AM antenna selectionMonitor key action Auto power OFFDefault Dial speed accelerationTurns the scan stop beep function on and OFF Scan pause timerScan resume timer Scan stop beepSets the audio output function while scope operation Scope audio outputOffset frequency Duplex directionAvailable subaudible tone frequencies Tone frequencyDtcs code Dtcs polarityTurns weather alert function on and OFF LCD contrast can be adjusted through 15 levelsMemory bank link LCD contrastCI-V baud rate CI-V addressCI-V transceive Selecting antenna RPush Dualwatch to exit set modeOther Functions Antenna selectionWeather alert function Turn the weather alert function OFF in set modeWeather channel operation Weather channel selectionData cloning Cloning using a personal computerReceiver shows following indications Cloning error Auto power-off functionIC recorder Playing back recorded contentRecording a received audio Recording set mode Quality setting Playback speed settingSame time, but cannot erase each track independently Automatic recordingErasing recorded audio RECPartial reset Command table Control CommandData format CI-V compatible transceiver Control CommandCcir channels Frequency TableTV channels S.A. channelsChannels China channelsNew ZealandFOT channels Indonesian channelsItalian channels Taiwan channelsWeather channelsunit MHz VHF marine channelsChannels 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 Troubleshooting MaintenanceGeneral SpecificationsOptions OptionsFor Microsoft Windows XP Driver InstallationDriver Installation Windows starts installing the USB driver 0Repeat step e to y After the installation is completed, click Finish2After 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 IR20 Pocket GuideRelease Mode Scan to start scan We Icom Inc. Japan Declaration ConformityKamiminami, Hirano-ku, Osaka 547-0003, Japan #07 France