ICOM orporated IC-2720H Amateur Transceiver with Scanning Receiver User Manual IC 2720H Instruction Manual

ICOM Incorporated Amateur Transceiver with Scanning Receiver IC 2720H Instruction Manual

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IC 2720H User Manual

Users Manual

INSTRUCTION MANUALi2720HDUAL BAND FM TRANSCEIVERThis device complies with Part 15 of the FCC rules. Operation is sub-ject to the following two conditions: (1) This device may not causeharmful interference, and (2) this device must accept any interferencereceived, including interference that may cause undesired operation.New2001IC-2720H.qxd 02.9.9 8:12 Page 1 (1,1)

RWARNING RF EXPOSURE!This device emitsRadio Frequency (RF)energy. Extreme caution should be observedwhen operating this device. If you have any questions regardingRF exposure and safety standards please refer to the FederalCommunications Commission Ofﬁce of Engineering and Technol-ogy’s report on Evaluating Compliance with FCC Guidelines forHuman Radio frequency Electromagnetic Fields (OET Bulletin 65).RWARNING! NEVER connect the transceiver to an ACoutlet. This may pose a ﬁre hazard or result in an electric shock.RWARNING! NEVER operate the transceiver while dri-ving a vehicle. Safe driving requires your full attention—anythingless may result in an accident.NEVER connect the transceiver to a power source of morethan 16 V DC. This will damage the transceiver.NEVER connect the transceiver to a power source using re-verse polarity. This will damage the transceiver.NEVER cut the DC power cable between the DC plug andfuse holder. If an incorrect connection is made after cutting, thetransceiver may be damaged.NEVER expose the transceiver to rain, snow or any liquids.The transceiver may be damaged.NEVER operate or touch the transceiver with wet hands. Thismay result in an electric shock or damage the transceiver.NEVER place the transceiver where normal operation of thevehicle may be hindered or where it could cause bodily injury.NEVER let objects impede the operation of the cooling fan onthe rear panel.DO NOT push the PTT when not actually desiring to transmit.DO NOT allow children to play with any radio equipment con-taining a transmitter.During mobile operation, DO NOT operate the transceiverwithout running the vehicle’s engine. When the transceiver’spower is ON and your vehicle’s engine is OFF, the vehicle’s bat-tery will soon become exhausted.BE CAREFUL! The transceiver will become hot when op-erating it continuously for long periods.AVOID using or placing the transceiver in direct sunlight or inareas with temperatures below –10°C (+14˚F) or above +60°C(+140˚F).AVOID the use of chemical agents such as benzine or alcoholwhen cleaning, as they can damage the transceiver’s surfaces.USE Icom microphones only (supplied or optional). Other man-ufacturer’s microphones have different pin assignments and maydamage the transceiver if attached.For U.S.A. onlyCAUTION: Changes or modiﬁcations to this device, not ex-pressly approved by Icom Inc., could void your authority tooperate this device under FCC regulations.iiNew2001PRECAUTIONIC-2720H.qxd 02.9.9 8:12 Page ii (1,1)

New2001iiiTABLE OF CONTENTSSUPPLIED ACCESSORIESqDC power cable (3 m) ………………………………………1wMobile mounting bracket …………………………………1eMicrophone (HM-133)* ……………………………………1rFuse (20 A) …………………………………………………1tMounting screws, nuts and washers …………………1 setyMicrophone hanger …………………………………………1uRemote controller bracket (MB-84) ………………………1iMounting screws, nuts and washers for MB-84 ……1 setoSeparation cable†(3.5 m; 11.5 ft) …………………………1*HM-118N HAND MICROPHONEor HM-118TN/TAN DTMF MICROPHONEsupplied versions are also available.†A ferrite core is adapted for the USA version.qw ertyuioFOREWORD ........................................................................................... iIMPORTANT ............................................................................................ iEXPLICIT DEFINITIONS ......................................................................... iPRECAUTION ........................................................................................ iiSUPPLIED ACCESSORIES .................................................................. iiiTABLE OF CONTENTS ......................................................................... iiiQUICK REFERENCE GUIDE ........................................................... I–XII■Installation ....................................................................................... I■Your ﬁrst contact .......................................................................... VII■Repeater operation ........................................................................ X■Programming memory channels.................................................... XI1 PANEL DESCRIPTION ............................................................... 1–10■Front panel— controller ................................................................. 1■Function display ............................................................................. 3■Main unit ........................................................................................ 5■Microphone (HM-133) .................................................................... 7■Microphone keypad ........................................................................ 8■Optional microphones (HM-118N/TN/TAN)................................... 102 SETTING A FREQUENCY ........................................................ 11–15■Preparation ................................................................................... 11■Using the tuning dial .................................................................... 13■Using the [Y]/[Z] keys ................................................................. 13■Using the keypad ......................................................................... 13■Tuning step selection ................................................................... 14■Lock functions .............................................................................. 153 BASIC OPERATION ................................................................. 16–21■Receiving ..................................................................................... 16■Monitor function ........................................................................... 16■Squelch attenuator ....................................................................... 17■V/V, U/U simultaneous receive (Para-watch) ............................... 18■Sub band mute/sub band busy beep ........................................... 19■Transmitting ................................................................................. 20IC-2720H.qxd 02.9.9 8:12 Page iii (1,1)

New2001iv1234567891011121314■Selecting output power ................................................................ 20■One-touch PTT function ............................................................... 21■Audio mute function ..................................................................... 214 REPEATER OPERATION ......................................................... 22–28■General ........................................................................................ 22■Accessing a repeater ................................................................... 23■Subaudible tones ......................................................................... 25■Offset frequency .......................................................................... 27■Auto repeater (USA version only) ................................................ 285 MEMORY OPERATION ............................................................ 29–37■General description ...................................................................... 29■Memory channel selection ........................................................... 29■Programming a memory channel ................................................. 30■Transferring memory contents ..................................................... 32■Memory clearing .......................................................................... 34■Memory bank selection ................................................................ 35■Memory bank setting .................................................................... 36■Transferring bank contents .......................................................... 376 CALL CHANNEL OPERATION ................................................ 38–39■Call channel selection .................................................................. 38■Call channel transferring .............................................................. 38■Programming a call channel ........................................................ 397 SCAN OPERATION .................................................................. 40–45■Scan types ................................................................................... 40■Scan start/stop ............................................................................. 41■Scan edges programming ............................................................ 42■Skip channel setting ..................................................................... 44■Scan resume condition ................................................................ 458 PRIORITY WATCH .................................................................... 46–47■Priority watch types ...................................................................... 46■Priority watch operation ............................................................... 479 DTMF MEMORY ENCODER ..................................................... 48–51■Programming a DTMF code ......................................................... 48■Transmitting a DTMF code .......................................................... 50■DTMF speed ................................................................................ 5110 POCKET BEEP AND TONE SQUELCH ................................... 52–55■Pocket beep operation ................................................................. 52■Tone/DTCS squelch operation ..................................................... 54■Tone scan ..................................................................................... 5511 OTHER FUNCTIONS ................................................................ 56–72■Set mode ...................................................................................... 56■Initial set mode ............................................................................. 60■AM/FM narrow mode ................................................................... 64■Weather channel operation (USA version only) ........................... 65■Microphone keys .......................................................................... 66■Partial reset .................................................................................. 67■All reset ........................................................................................ 67■Data cloning ................................................................................. 68■Packet operation .......................................................................... 6912 MAINTENANCE ........................................................................ 73–74■Troubleshooting ........................................................................... 73■Fuse replacement ........................................................................ 7413 SPECIFICATIONS AND OPTIONS ........................................... 75–76■Speciﬁcations ............................................................................... 75■Options ......................................................................................... 7614 MODE ARRANGEMENT ........................................................... 77–78IC-2720H.qxd 02.9.9 8:12 Page iv (1,1)

IQUICK REFERENCE GUIDENew2001■InstallationDInstallation methods• Single body installation• Optional MB-85 COMBINATION BRACKETis necessary tomount the controller to the main unit. (20 cm; 77⁄8″separa-tion cable is supplied with the bracket.)• The supplied mounting bracket (or optional MB-17A) can beused for the main unit installation.• Remote installation• The supplied MB-84 REMOTE CONTROLLER BRACKETandOPC-1155 SEPARATION CABLEcan be used for installation.• Optional OPC-1156 SEPARATION CABLE(3.5 m; 11.5 ft) isavailable for extend the separation cable.• Optional MB-65 MOUNTING BASEis available for increasingfront panel mounting possibilities.• Optional OPC-440 MICROPHONE CABLE(5.0 m; 16.4 ft) andOPC-647 (2.5 m; 8.2 ft) are available to extend the micro-phone cable.• Optional OPC-441 SPEAKER CABLE(5.0 m; 16.4 ft) is avail-able to extend the speaker cable.Main bodyFront panelTransceiverIC-2720H.qxd 02.9.9 8:12 Page I (1,1)

IIQUICK REFERENCE GUIDENew2001DLocationSelect a location which can support the weight of the trans-ceiver and does not interfere with driving. We recommend thelocations shown in the diagram below.NEVER place the transceiver or remote controller where nor-mal operation of the vehicle may be hindered or where itcould cause bodily injury.NEVER place the transceiver or remote controller where airbag deployment may be obstructed.DO NOT place the transceiver or remote controller where hotor cold air blows directly onto it.AVOID placing the transceiver or remote controller in directsunlight.DUsing the mounting bracketqDrill 4 holes where the mounting bracket is to be installed.•Approx. 5.5–6 mm (1⁄4″) when using nuts; approx. 2–3 mm (1⁄8″)when using self-tapping screws.wInsert the supplied screws, nuts and washers through themounting bracket and tighten.eAdjust the angle for your suitable position.25˚NutSpring washerWhen usingself-tappingscrewsFlat washer Mounting nutMountingbracketControllerMain unitMain unitMain unitQuick reference guideIC-2720H.qxd 02.9.9 8:12 Page II (1,1)

IIIQUICK REFERENCE GUIDENew2001DMB-84 installationThe supplied MB-84 REMOTE CONTROLLER BRACKETis usedfor separate installation.qDrill 2 holes where the bracket is to be installed.•Approx. 4 mm (1⁄8″) when using nuts; approx. 1–2mm (1⁄16″)when using self-tapping screws.wAttach the remote controller to the MB-84 and tighten thecontroller using with the supplied screws.eTighten the controller with bracket.• Using the optional MB-65MB-84(supplied)OptionalMB-65Adjust the view-ing angle for maximum visibili-ty of the function display.MB-84MB-84• Over-head mounting• Standard mountingRemotecontrollerSuppliedscrewsSuppliedscrewsSelf-tappingscrewsRemotecontrollerNutSpringwasherFlatwasherIC-2720H.qxd 02.9.9 8:12 Page III (1,1)

IVQUICK REFERENCE GUIDENew2001DOptional MB-85 installationWhen using the optional MB-85 (COMBINATION BRACKET), youcan install the control head of the IC-2720H in one of 2 meth-ods. A 20 cm (77⁄8″) remote control cable is supplied for con-nection, and connect the cable before attaching the bracket tothe main unit is recommended.•Example 1 •Example 2Quick reference guideIC-2720H.qxd 02.9.9 8:12 Page IV (1,1)

VNew2001DSeparation cable connectionA separation cable (3.5 m; 11.5 ft) is supplied with the IC-2720H.Connect the controller and the main unit using with the sepa-ration cable as follows.IMPORTANT!— For the USA versionA ferrite core is supplied within the separation cable. Connectthe cable connector with the ferrite core into the main unit[CONTROLLER] socket as below.DMicrophone connectionTwo microphone connectors are available for the IC-2720H—one is on the controller side panel, and another is on the mainunit front panel.Connect the supplied microphone to either the desired con-nector as illustrated below.ControllerMain unitFerrite coreController Main unitSee “IMPORTANT!” below.QUICK REFERENCE GUIDEIC-2720H.qxd 02.9.9 8:12 Page V (1,1)

VIQUICK REFERENCE GUIDENew2001DBattery connection☞RWARNING NEVER remove the fuse holders from theDC power cable.☞NEVER connect the transceiver directly to a 24 V battery.☞DO NOT use the cigarette lighter socket for power con-nections. (See p. 6 for details)Attach a rubber grommet when passing the DC power cablethrough a metal plate to prevent a short circuit.•CONNECTING TO A DC POWER SOURCEDDC power supply connectionUse a 13.8 V DC power supply with at least 15 A capacity. Make sure the ground terminal of the DC power supply isgrounded.•CONNECTING TO A DC POWER SUPPLYSee p. 74 for fuse replacement.DC powersupply 13.8 Vto anACoutletFuses20 Ablackred⊕−⊕−IC-2720HIC-2720HFuses20 Ablackred⊕−12 VGrommetNOTE: Use terminals for the cable connections.WARNING!NEVERremove thefuse holders.Crimp Solder12 Vbattery SuppliedDC power cable+ red_ blackQuick reference guideIC-2720H.qxd 02.9.9 8:12 Page VI (1,1)

VIIQUICK REFERENCE GUIDENew2001DAntenna installation•Antenna locationTo obtain maximum performance from the transceiver, selecta high-quality antenna and mount it in a good location. A non-radial antenna should be used when using a magnetic mount.•Antenna connectorThe antenna uses a PL-259 connector.•PL-259 CONNECTORqSlide the coupling ringdown. Strip the cablejacket and soft solder.wStrip the cable as shownat left. Soft solder the cen-ter conductor.eSlide the connector bodyon and solder it.rScrew the coupling ringonto the connector body.(10 mm ≈3⁄8 in)NOTE: There are many publications covering proper an-tennas and their installation. Check with your local dealerfor more information and recommendations.30 mm10 mm (soft solder)10 mm1–2 mmsolder solderSoftsolderCoupling ringTo antennaRoof-mount antenna(Drill a hole or use a magnetic mount.)Gutter-mount antennaTrunk-mountantennaIC-2720H.qxd 02.9.9 8:12 Page VII (1,1)

IXQUICK REFERENCE GUIDENew20013. Selecting the operating frequency bandThe IC-2720H has 2 m and 70 cm bands for each left andright band. The operating band can be exchanged betweenthem, and the same bands, V/V and U/U settings, also possi-ble.➥Push the desired band’s (left or right) [MAIN•BAND] for1 sec. then rotate the appropriate band’s [DIAL].•Push the [MAIN•BAND] momentarily to return to frequency indi-cation.4. Tune the frequencyThe tuning dial will allow you to dial in the frequency you wantto operate. Pages 13 and 14 will instruct you on how to setthe tuning speed.Using the HM-133You can directly enter the frequency with the HM-133 keypadfor the main band. MAINT XMAINT XMAINT XMAINT X[EXAMPLE]: Setting frequency to 145.3625 MHz.PushPushPushPushRotate the desired [DIAL].MAINT XMAINT XMMFrequency band initial is displayed.Push the desired band’s[MAIN•BAND] for 1 sec.[DIAL]IC-2720H.qxd 02.9.9 8:12 Page IX (1,1)

XQUICK REFERENCE GUIDENew2001■Repeater operation1. Setting duplex Push desired band’s [MAIN•BAND] to select the main band.Push [DUP•MONI] once or twice to select minus duplex orplus duplex.•The USA version have an auto repeater function, therefore, settingduplex is not required.2. Repeater tone Push [TONE•DTMF] several times until “T” appears, if the re-peater requires a subaudible tone to be accessed.Using the HM-133Plus or minus duplex selection and the repeater tone settingcan be made easily via HM-133.Push [DUP–7(TONE)] for minus duplex; [DUP+8(TSQLS)]for plus duplex selection, push [FUNC] then [DUP–7(TONE)]to turn the repeater tone ON.MAINT XDUPMAINT XDUPMAINT XTPushPush , then PushMAINT XDUP TPush [TONE•DTMF].MAINT XDUPPush [DUP•MONI].Quick reference guideIC-2720H.qxd 02.9.9 8:12 Page X (1,1)

XIQUICK REFERENCE GUIDENew2001■Programming memory channelsThe IC-2720H has a total of 212 memory channels (including10 scan edges and 2 call channels) for storing often used op-erating frequency, repeater settings, etc. Any memory channel can be recalled from either left or rightband.1. Setting a frequencyIn VFO mode, set the desired operating frequency with re-peater, tone and tuning steps, etc. ➥Push the desired band’s [V/MHz•SCAN] to select VFO.➥Rotate the same band’s [DIAL] to set the desired frequency.•Set other data, such as repeater tone, duplex information, tuningstep), if desired.2. Selecting a memory channel Push the same band’s [M/CALL•MW] for 1 sec., then rotatethe [DIAL] to select the desired memory channel.•“M” indicator and memory channel number blink.3. Writing a memory channelPush and hold the [M/CALL•MW] for 1 sec. to program.•3 beeps sound•Return to VFO mode automatically after the program.•Memory channel number automatically increases when continuingto push the [M/CALL•MW] after programming.MAINT XMPush [M/CALL•MW] for 1 sec.IC-2720H.qxd 02.9.9 8:12 Page XI (1,1)

XIIQUICK REFERENCE GUIDENew2001Using the HM-133qIn VFO mode, set the desired operating frequency, includ-ing offset direction, tone settings, etc.➥Push [VFO/LOCK] to select VFO.➥Push [ENTC(T-OFF)] ﬁrst, then enter the desired oper-ating frequency via the keypad.•Set other data, such as repeater tone, duplex information,tuning step, if necessary.wPush [FUNC] then [CLRA(MW)].•“M” indicator and memory channel number blink.ePush [Y]/[Z] to select the desired memory channel.rPush [FUNC] then push [CLRA(MW)] for 1 sec. to pro-gram.•3 beeps sound•Memory channel number automatically increases when continu-ing to push [CLRA(MW)] after programming.MAINT XMPush , then Quick reference guideIC-2720H.qxd 02.9.9 8:12 Page XII (1,1)

■Front panel— controllerqPOWER SWITCH [PWR]Turns power ON and OFF when pushed for 1 sec.wSET•LOCK SWITCH [SET•]➥Enters set mode when pushed. (p. 56)➥Switches the lock function ON and OFF when pushedfor 1 sec. (p. 15)eOUTPUT POWER•PRIORITY SWITCH [LOW•PRIO]➥Each push changes the output power selection. (p. 20)➥Starts priority watch when pushed for 1 sec. (p. 47)rTONE•DTMF SWITCH [TONE•DTMF]➥Each push selects a tone function. (pgs. 23, 52)•Subaudible tone encoder, pocket beep (CTCSS), tonesquelch, pocket beep (DTCS), DTCS squelch or tone func-tion OFF can be selected.➥Turns DTMF memory encoder ON and OFF whenpushed for 1 sec. (p. 48)tDUPLEX•MONITOR SWITCH [DUP•MONI]➥Push to select DUP–, DUP+ and simplex operation.(p. 23)➥Push for 1 sec. to switch the monitor function ON andOFF. (p. 16)MAINBANDSCANMWV/MHzM/CALLMAINBANDSCANV/MHzMWM/CALLVOLVOLDIALDIALSQLSQLDUPMONITONEDTMFLOWPRIODUAL BAND FM TRANSCEIVERi2720PWR SETBUSYLOWMIDBUSYLOWMIDMAINT XDUP T SQLDTCSAMMAINT XDUP TSQLDTCSAMMSKIPMSKIPqFunction display (pgs. 3, 4) wert1PANEL DESCRIPTIONNew20011*The switches wto tarefor the MAIN band only.IC-2720H.qxd 02.9.9 8:12 Page 1 (1,1)

21PANEL DESCRIPTIONNew20011yMAIN•BAND SWITCH [MAIN•BAND]➥Push to select the main band. (p. 11)➥Enters operating band select condition when pushed for1 sec. (p. 11)uVFO/MHz TUNING•SCAN SWITCH [V/MHz•SCAN]➥Selects and toggles VFO mode and 1 MHz (or 10 MHzfor some versions) tuning when pushed. (p. 12)➥Starts scan when pushed for 1 sec. (p. 41)•Cancels a scan when pushed during scan.iMEMORY/CALL•MEMORY WRITE SWITCH [M/CALL•MW]➥Push to select and toggle memory, call and weatherchannel* modes. (pgs. 12, 29, 38, 65)*Weather channels available for USA versions only.➥Selects a memory channel for programming whenpushed for 1 sec. (pgs. 30, 39, 42)oVOLUME CONTROL [VOL] (p. 16)Adjusts the audio level for relative band.!0TUNING DIAL [DIAL]Selects the operating frequency (p. 13), memory channel(p. 29), the setting of the set mode item and the scanningdirection (p. 41) for the relative band.!1SQUELCH CONTROL [SQL]Varies the squelch level for relative band. (p. 16)•The RF attenuator activates and increases the attenuation whenrotated clockwise to the center position and further. (p. 17)MAINBANDSCANMWV/MHzM/CALLMAINBANDSCANV/MHzMWM/CALLVOLVOLDIALDIALSQLSQLDUPMONITONEDTMFLOWPRIODUAL BAND FM TRANSCIEVERi2720PWR SETooLeft band Right bandyui!0yui!0!1!1*The same controls for both the left andright bands are arranged in symmetry.IC-2720H.qxd 02.9.9 8:12 Page 2 (1,1)

31PANEL DESCRIPTIONNew2001■Function displayqMAIN INDICATOR (p. 11)Indicate the main band for transmit and function control. wTRANSMIT INDICATOR➥Appears while transmitting. (p. 20)➥Blinks while transmitting with the one-touch PTT func-tion. (p. 21)eDUPLEX INDICATORS (p. 23)“DUP” appears when plus duplex, “DUP –” appears whenminus semi-duplex (repeater) operation is selected.rTONE INDICATORS➥“T” appears while the subaudible tone encoder is in use.(p. 23)➥“T SQL” appears while the tone squelch function is inuse. (p. 52)➥“DTCS” appears while the DTCS squelch function is inuse. (p. 52)➥“S” appears with the “T SQL” or “DTCS” indicatorwhile the pocket beep function (with CTCSS or DTCS) is inuse. (p. 52)BUSYLOWMIDBUSYLOWMIDMAINT XDUP T SQLDTCSAMMAINT XDUP TSQLDTCSAMMSKIPMSKIPqwe r tyuio!0!1!2yqwe r tuio!0!1!2Left band Right band*The same indications for both the left and right bands are arranged.IC-2720H.qxd 02.9.9 8:12 Page 3 (1,1)

41PANEL DESCRIPTIONNew20011tAM INDICATOR (p. 64)Appears when AM mode is selected. yFREQUENCY READOUTShows the operating frequency, set mode contents, etc.•Frequency decimal point blinks while scanning. (p. 41)•“d” appears in place of the 1st digit while the DTMF memoryfunction is in use. (p. 48)uMEMORY CHANNEL NUMBER INDICATORS ➥Shows the selected memory channel number. (p. 29)➥Shows the selected bank initial. (p. 35)➥“C” appears when the call channel is selected. (p. 38)➥“L” appears when the lock function is activated. (p. 15)iSKIP INDICATOR (p. 44)Appears when the displayed memory channel is speciﬁedas a skip channel.oMEMORY INDICATOR (pgs. 12, 29)Appears when memory mode is selected.!0S/RF INDICATORS➥Shows the relative signal strength while receiving sig-nals. (p. 16)➥Shows the output power level while transmitting. (p. 20)!1OUTPUT POWER INDICATORS“LOW” appears when low output power; “MID” appearswhen middle output power is selected.No indicator appears when high output power is selected.!2BUSY INDICATOR ➥Appears when a signal is being received or the squelchis open. (p. 16)➥Blinks while the monitor function is activated. (p. 16)IC-2720H.qxd 02.9.9 8:12 Page 4 (1,1)

51PANEL DESCRIPTIONNew2001■Main unitqDATA SOCKET [DATA]Connects a TNC (Terminal Node Controller), etc. for datacommunications.•See p. 6 for connection information.wMICROPHONE CONNECTOR [MIC]Connects the supplied or an optional microphone. q+8 V DC output (Max. 10 mA)wChannel up/downe8 V control INrPTTtGND (microphone ground)yMIC (microphone input)uGNDiData INeCONTROLLER CONNECTOR [CONTROLLER] (p. V)Connects the controller unit with the supplied cable.rCOOLING FAN Rotates while transmitting. Also rotates while receiving depending on the setting in ini-tial set mode. (p. 62)tANTENNA CONNECTOR [ANT]Connects a 50 Ωantenna with a PL-259 connector and a50 Ωcoaxial cable.ANTENNA INFORMATIONFor radio communications, the antenna is of critical impor-tance, to maximize your output power and receiver sensi-tivity. The transceiver accepts a 50 Ωantenna and lessthan 1:1.5 of Voltage Standing Wave Ratio (VSWR). HighSWR values not only may damage the transceiver but alsolead to TVI or BCI problems.qiqwertyuiIC-2720H.qxd 02.9.9 8:12 Page 5 (1,1)

61PANEL DESCRIPTIONNew20011yEXTERNAL SPEAKER JACK 1 [SP-1]Connects an 8 Ωspeaker. Outputs both left and rightbands audio when no external speaker is connected to[SP-2]. See the table below for details.•Audio output power is more than 2.4 W.uEXTERNAL SPEAKER JACK 2 [SP-2]Connects an 8 Ωspeaker. Outputs right band’s audio only. •Audio output power is more than 2.4 W.iPOWER RECEPTACLE [DC13.8V]Accepts 13.8 V DC ±15% with the supplied DC powercable.☞NOTE: DO NOT use a cigarette lighter socket as apower source when operating in a vehicle. The plugmay cause voltage drops and ignition noise may be su-perimposed onto transmit or receive audio.DDSpeaker informationDDATA JACK PIN ASSIGNMENTqDATA INInput terminal for data transmit. See p. 62 for details onhow to toggle data speed between 1200 (AFSK) and9600 bps (G3RUH, GMSK).wGNDCommon ground for DATA IN, DATA OUT and AF OUT.ePTT PPTT terminal for packet operation only. Connect ground totransmit data.rDATA OUTData out terminal for 9600 bps operation only.tAF OUTData out terminal for 1200 bps operation only.yP SQLBecomes high (+5 V) when the transceiver receives a sig-nal which opens the squelch.•To avoid unnecessary TNC transmission, connect squelch to theTNC to inhibit transmission when receiving signals.•Keep audio output at a normal level, otherwise a “P SQL” signalwill not be output.Front panel viewwyrqetConnected Left band audio Right band audiospeakerNo external Internal speaker (mixed audio)speakers[SP-1] only External speaker (mixed audio)[SP-2] only Internal speaker External speaker2 external External speaker via External speaker viaspeakers [SP-1] [SP-2]IC-2720H.qxd 02.9.9 8:12 Page 6 (1,1)

71PANEL DESCRIPTIONNew2001■Microphone (HM-133*)qVFO/LOCK SWITCH [VFO/LOCK]➥Push to select VFO mode. (p. 12)➥Push for 1 sec. to switch the lock function ON and OFF.(p. 15)wPTT SWITCH➥Push and hold to transmit; release to receive.➥Switches between transmitting and receiving while theone-touch PTT function is in use. (p. 21)eUP/DOWN SWITCHES [Y]/[Z]➥Push either switch to change operating frequency,memory channel, set mode setting, etc. (pgs. 13, 29, 56)➥Push either switch for 1 sec. to start scanning. (p. 41)rACTIVITY INDICATOR➥Lights red while any key, except [FUNC] and [DTMF-S],is pushed, or while transmitting.➥Lights green while the one-touch PTT function is in use.tKEYPAD (pgs. 8, 9)yFUNCTION INDICATOR➥Lights orange while [FUNC] is activated—indicates thesecondary function of switches can be accessed.➥Lights green when [DTMF-S] is activated—DTMF sig-nals can be transmitted with the keypad.u2nd FUNCTION SWITCH [FUNC] iDTMF SELECT SWITCH [DTMF-S] (p. 50)oFUNCTION SWITCHES [F-1]/[F-2] (p. 66)Program and recall your desired transceiver conditions.!0BAND SWITCH [BAND] (p. 11)Push to switches main band between left and right bands. !1MEMORY/CALL SWITCH [MR/CALL]➥Push to select memory mode. (p. 12)➥Push for 1 sec. to select call channel. (p. 38)✔Important!All keys on the microphone function for the main band only. Mic elementqertwyuio!0!1*A different microphonemay be supplied de-pending on version.IC-2720H.qxd 02.9.9 8:12 Page 7 (1,1)

81PANEL DESCRIPTIONNew20011■Microphone keypadKEY FUNCTION SECONDARY FUNCTION ( +key) OTHER FUNCTIONSSwitches between opening and closing thesquelch. (p. 16)Starts and stops scanning. (p. 41)Starts and stops priority watch. (p. 47)Selects high output power. (p. 20)Selects mid. output power. (p. 20)Selects low output power (p. 20)Selects minus duplex operation. (p. 24)Selects plus duplex operation. (p. 24)Selects simplex operation. (p. 24)Increases audio output level. (p. 16)In VFO mode enters operating band select-ing condition. (p. 12)In memory mode enters bank selectingcondition. (p. 35)Starts and stops tone scanning. (p. 55)Turns the one-touch PTT function ON andOFF. (p. 21)Turns the DTCS squelch ON. (p. 53)Turns the DTCS pocket beep function ON.(p. 53)Turns the DTMF memory encoder functionON. (p. 49)Turns the subaudible tone encoder ON.(p. 24)Turns the CTCSS pocket beep functionON. (p. 53)Turns the tone squelch function ON.(p. 53)Sends a 1750 Hz tone signal while pushingand holding. (p. 26)After pushing :Transmits the appropriateDTMF code. (pgs. 26, 50)When the DTMF memory en-coder is activated, push [0] to[9] to transmit the appropriateDTMF memory contents .(p. 50)IC-2720H.qxd 02.9.9 8:12 Page 8 (1,1)

91PANEL DESCRIPTIONNew2001➥Cancels frequency entry. (p. 13)➥Cancels the scan or priority watch. (pgs. 41, 47)➥Exit set mode. (p. 56)➥Enters set mode (p. 56)➥Advances the set mode selection orderafter entering set mode. (p. 56)➥Sets the keypad for numeral input.(p. 13)➥Reverses the set mode selection orderafter entering set mode. (p. 56)Adjusts the squelch level increments.(p. 16)Decreases audio output level. (p. 16)Adjusts the squelch level decrement. (p. 16)➥Selects a memory channel for program-ming. (p. 31)➥Advances the memory channel numberwhen continuously pushed after pro-gramming is completed. (p. 31)DTMF memory encoder function OFF.(p. 50)Turns the subaudible tone encoder, pocketbeep or CTCSS/DTCS tone squelch OFF.(pgs. 24, 53)Mutes the audio. (p. 21)•Mute function is released when any oper-ation is performed.Sends a 1750 Hz tone signal for 0.5 sec.(p. 26)Locks the digit keys on the keypad (includ-ing the A to D, # and Mkeys. (p. 15)After pushing :Transmits the appropriateDTMF code. (pgs. 26, 50)KEY FUNCTION SECONDARY FUNCTION ( +key) OTHER FUNCTIONSIC-2720H.qxd 02.9.9 8:12 Page 9 (1,1)

101PANEL DESCRIPTIONNew20011■Optional Microphones(HM-118N/TN/TAN)qPTT SWITCH➥Push and hold to transmit; release to receive.wUP/DOWN SWITCHES [UP]/[DN]➥Push either switch to change operating frequency,memory channel, set mode setting, etc. (pgs. 13, 29, 56)➥Push either switch for 1 sec. to start scanning. (p. 41)eUP/DN LOCK SWITCHSlide to toggle [UP]/[DN] switches function ON and OFF.rKEYPAD (HM-118TN/TAN only)While pushing [PTT], push the desired key to send theDTMF code.wqONOFFewrqONOFFe• HM-118N• HM-118TN/TAN (DTMF)IC-2720H.qxd 02.9.9 8:12 Page 10 (1,1)

11SETTING A FREQUENCYNew20012■PreparationDTurning power ON/OFF➥Push [PWR] for 1 sec. to turn power ON and OFF.DMAIN bandThe IC-2720H can receive 144 MHz and 430(440) MHz bandsignals simultaneously. To activate all functions access or tochange frequency via the microphone, you must designateone band as the main band. The transceiver transmits a sig-nal on the main band only.➥Push the desired band’s [MAIN•BAND] to select the mainband.•“Q” indicates the main band.➥Push [BAND] to toggle the main band betweenleft and right bands.DOperating frequency band selectionIn the default condition, or after resetting the CPU, 2 m bandis assigned in the left band, 70 cm band is assigned in theright band. However, the 2 m band can also be assigned intothe right, and 70 cm band can also be assigned into the leftband.qPush the desired band’s [MAIN•BAND] for 1 sec.•Frequency band initial appears.wRotate the same band’s [DIAL] to select the desired fre-quency band.•Pushing [Y]/[Z] on the microphone also selects the band.ePush the [MAIN•BAND] to return to frequency indication inthe selected frequency band.MAINT XMAINT XMMFrequency band initial is displayed.Push the desired band’s[MAIN•BAND] for 1 sec.[DIAL]BANDPush the desired band’s [MAIN•BAND]Push [PWR] for 1 sec. Note that in this manual, sections beginning with a micro-phone icon (as at left), designate operation via the HM-133microphone.IC-2720H.qxd 02.9.9 8:12 Page 11 (1,1)

122SETTING A FREQUENCYNew20012zPush [BAND] to select main band.xPush [FUNC], the push [BANK1(MONI)] to se-lect frequency band selecting condition.•The frequency band initial is displayed.cPush [Y]/[Z] to select the desired frequencyband.vPush [CLRA(MW)] to exit the condition, and re-turn to frequency indication.✔About extra frequency bands— USA and General versions onlyIn addition to the 2 m and 70 cm ham bands, the IC-2720HUSA and General versions have extra frequency bands foreach left and right bands as follow.See the speciﬁcations for the available frequency bands fordetails.*The frequency band initials are default indication only. Once the op-erating frequency is set in the band, the initial indication will bechanged. ✔: Available, —: Not availableDVFO and memory modesThe transceiver has 2 basic operating modes: VFO mode andmemory mode. Select VFO mode ﬁrst to set an operating fre-quency.➥Push the desired band’s [V/MHz•SCAN] to select VFOmode.•When VFO mode is already selected, the digit below 10 MHz(the digit below 1 MHz or 100 kHz disappear depending on ver-sions) disappear. In this case, push [V/MHz•SCAN] again (ortwice or 3 times depending on version).➥Push [M/CALL•MW] to select memory mode.•“!” indicator appears when memory mode is selected.➥Push [VFO/LOCK] to select VFO mode.➥Push [MR/CALL] to select memory mode.•The microphone controls the main band only. Push[BAND] to toggle the main band, then push[VFO/LOCK] or [MR/CALL], if necessary.VFO/LOCKMAINT XMAINT XMMPush [M/CALL•MW]to select memory modeVFO mode is selected “!” indicator appears whenmemory mode is selectedPush [V/MHz•SCAN] to select VFO modeBANK[Y]/[Z]Frequency Left band Right bandband initial*127 ✔✔222 ✔—375 ✔✔500 ✔✔900 —✔IC-2720H.qxd 02.9.9 8:12 Page 12 (1,1)

132SETTING A FREQUENCYNew2001■Using the tuning dialqRotate the desired band’s [DIAL] to set the frequency.•If VFO mode is not selected, push the same band’s[V/MHz•SCAN] to select VFO mode.•The frequency changes in the selected tuning steps. (p. 14)wTo change the frequency in 1 MHz (10 MHz for some versions)steps, push [V/MHz•SCAN], then rotate [DIAL].•Pushing [V/MHz•SCAN] for 1 sec. starts scan function. If scanstarts, push [V/MHz•SCAN] again to cancel it.■Using the [Y]/[Z] keys➥Push [Y] or [Z] to select the desired frequency.•Push [BAND] to select the desired band (left or right)as the main band in advance.•Pushing [Y]/[Z] for 1 sec. activates a scan. If scanstarts, push [Y]/[Z] or [CLRA(MW)] to cancel it.■Using the keypadThe frequency can be directly set via numeral keys on the mi-crophone.zPush [BAND] to select the desired band (left orright) as the main band.•Push [VFO/LOCK] to select VFO mode, if necessary.xPush [ENTC(T-OFF)] to activate the keypad fordigit input.cPush 6 keys to input a frequency.•When a digit is mistakenly input, push [ENTC(T-OFF)]to clear the input, then repeat input from the 1st digit.•Pushing [CLRA(MW)] clears input digits and retrievesthe frequency.MAINT XMAINMAINT XMAINT XPushPushPushPush[EXAMPLE]: Setting frequency to 145.3625 MHz.ENTCYZMAINT XMAINT XMMWhile 1 MHz tuning step is selected, the digit below 100 kHz disappear.While 10 MHz tuning step is selected, the digit below 1 MHz disappear.Push [V/MHz•SCAN]Rotate the tuning dialIC-2720H.qxd 02.9.9 8:12 Page 13 (1,1)

142SETTING A FREQUENCYNew20012■Tuning step selection[Tuning steps are the minimum frequency change incrementswhen you rotate [DIAL] or push [Y]/[Z] on the microphone.Independent tuning step for the left and right, as well as eachfrequency bands can be set for individual tuning convenience.The following tuning steps are available.•5 kHz •10 kHz •12.5 kHz •15 kHz•20 kHz •25 kHz •30 kHz •50 kHz☞NOTE: For convenience, select a tuning step that matchesthe frequency intervals of repeaters in your area.qPush the desired band’s [MAIN•BAND] to select the mainband.•Push the same band’s [V/MHz•SCAN] to select VFO mode, ifnecessary.wPush [SET•] to enter set mode.ePush [SET•] or [LOW•PRIO] several times until “tS” ap-pears as shown below.rRotate the same band’s [DIAL] to select the desired tuningstep.tPush [TONE•DTMF] to exit set mode.zPush [BAND] to select the desired band (left orright) as the main band.•Push [VFO/LOCK] to VFO mode, if necessary.xPush [SETB(D-OFF)] to enter set mode.cPush [SETB(D-OFF)] or [ENTC(T-OFF)] severaltimes until “tS” appears.vPush [Y] or [Z] to select the desired tuning step.bPush [CLRA(MW)] to exit set mode.SETBMAINT XMPush [SET• ] [LOW•PRIO] IC-2720H.qxd 02.9.9 8:12 Page 14 (1,1)

152SETTING A FREQUENCYNew2001■Lock functionsTo prevent accidental frequency changes and unnecessaryfunction access, use the lock function. The transceiver has 2different lock functions.DFrequency lockThis function locks [DIAL] and switches electronically and canbe used together with the microphone lock function.➥Push [SET•] for 1 sec. to turn the lock function ON andOFF.•[PTT], [DUP•MONI] (monitor function only), [VOL], [SQL] and[MAIN•BAND] (main band selection only) can be used while thechannel lock function is in use. Also, TONE-1, TONE-2, DTMFtones or DTMF memory contents can be transmitted from the mi-crophone.➥Push [VFO/LOCK] for 1 sec. to switch thelock function ON and OFF.DMicrophone keypad lockThis function locks the microphone keypad.➥Push [FUNC] then [SQLZD(16KEY-L)] toswitch the microphone keypad lock functionON and OFF.•[PTT], [VFO/LOCK], [MR/CALL], [BAND], [Y], [Z],[F-1], [F-2], [DTMF-S] and [FUNC] on the micro-phone can be used.•All switches on the transceiver can be used.•The keypad lock function is released when thepower is turned OFF then ON again.16KEY-LVFO/LOCKMAINT XMAINT XMMPush [SET• ]for 1 sec.2 “L”s appear while the lock function is activated.IC-2720H.qxd 02.9.9 8:12 Page 15 (1,1)

163BASIC OPERATION23■ReceivingqSet the audio level for the main band.➥Push the desired band’s [MAIN•BAND].➥Push [DUP•MONI] for 1 sec. to open the squelch.➥Rotate the main band’s [VOL] to adjust the audio level.➥Push the [DUP•MONI] for 1 sec. to close the squelch.wSet the squelch level.➥Rotate the main band’s [SQL] fully counterclockwise inadvance, then rotate the [SQL] clockwise until the noisejust disappears.•When interference is received, rotate the [SQL] clockwiseagain for attenuator operation. (p. 17)eSet the operating frequency in main band. (pgs. 11–13)rWhen receiving a signal on the set frequency, squelchopens and the transceiver emits audio.•“BUSY” appears and the S/RFindicator shows the relativesignal strength for the re-ceived signal.✔CONVENIENT!The main band’s audio and squelch level can alsobe adjusted with [VOLY(TONE-1)]/[VOLZ0(TONE-2)]and [SQLYD(MUTE)]/[SQLZ#(16KEY-L)], respectively.•“VOL” for audio or “SqL” for squelch appears during set.■Monitor functionThis function is used to listen to weak signals without disturb-ing the squelch setting. ➥Push [DUP•MONI] for 1 sec. to open the squelch.•Push [MIN•BAND] to select the desired band (left or right) as themain band in advance.•“BUSY” blinks.•Push [DUP•MONI] for 1 sec. again to cancel the function.➥Push [MONI1(BANK)] to open the squelch.•Push [BAND] to select the desired band (left or right)as the main band in advance. •Push [MONI1(BANK)] again to cancel the function.NOTE: When [SQL] is set to too far clockwise position, 12to 17 hours. The squelch attenuator may be functioning,even while monitoring. To monitor weak signals on the op-erating frequency, deactivate the squelch attenuator func-tion. See p. 17 for details.MONI1BUSYMAINT XMAINT XMMPush [DUP•MONI]for 1 sec.MShow set level.SQLY/ZD/#VOLY/ZM/0BUSYMAINT XMAppears when receiving a signal.IC-2720H.qxd 02.9.9 8:12 Page 16 (1,1)

173BASIC OPERATIONNew2001■Squelch attenuatorThe transceiver has an RF attenuator related to the squelchlevel setting. Approx. 10 dB attenuation is obtained at maxi-mum setting. The squelch attenuator allows you to set a minimum signallevel needed to open the squelch. The attenuator function canbe deactivated in initial set mode.➥Rotate [SQL] clockwise past the 12 o’clock position to ac-tivate the squelch attenuator.•Attenuation level can be adjusted up to 10 dB (approx.) between12 o’clock and fully clockwise position.•When setting the squelch from the microphone, a level greaterthan ‘19’activates the squelch attenuator.NOTE: The squelch attenuator functions even when themonitor function is in use. Thus set the [SQL] control within10 to 12 o’clock position is recommended when using themonitor function.DSquelch attenuator settingqTurn the transceiver power OFF.wWhile pushing [SET•], turn the power ON to enter initialset mode.ePush [SET•] or [LOW•PRIO] to select “Att-On” (squelchattenuator) item.rRotate the left band’s [DIAL] to toggle the function ON andOFF.•Select “OF” to deactivate the squelch attenuator function.tPush [PWR] to exit initial set mode.MAINT XMMAINT XMWhile pushing [SET• ]push [PWR] to enter initial set modeUSINGINITIAL SET MODESquelch isopen.SquelchattenuatorSquelch threshold Shallow DeepNoise squelchIC-2720H.qxd 02.9.9 8:12 Page 17 (1,1)

■V/V, U/U simultaneous receive (Para-watch)183BASIC OPERATIONNew20013The IC-2720H can simultaneously receive two signals on thesame band, such as 144 MHz band, using the para-watchfunction.qPush either the left or right band’s [MAIN•BAND] for 1 sec.to select the frequency band selecting condition.wRotate the same band’s [DIAL] to select the desired fre-quency band.ePush the [MAIN•BAND] to return to frequency indication.rSet the desired frequency.tRepeat the steps qto rfor the other band (left or right).To activate the para-watch function from the HM-133, enterthe desired frequencies for each the left and right bands usingthe direct frequency input capability via the keypad; or per-form the following operation.zPush [FUNC], the push [BANK1(MONI)] to se-lect frequency band selecting condition.•The frequency band initial appears on the main band.xPush [Y]/[Z] to select the desired frequencyband band.cPush [CLRA(MW)] to exit the condition, and re-turn to frequency indication.vPush [VFO/LOCK] to change main band, thenrepeat the steps zto cfor the other band.NOTE:•Memory channels are common for the left and right band.•Transmitting during the para-watch operation is possible.However, the sub band’s reception is deactivated duringtransmit.BANK[Y]/[Z]MAINT XMAINT XMMMAINT XDUPMAINT XMMMAINT XMAINT XMMCan be switched between VHF and UHF.[Example]IC-2720H.qxd 02.9.9 8:12 Page 18 (1,1)

The sub band mute function automatically cuts out sub bandaudio signals when both main and sub band signals are re-ceived simultaneously.While operating on the main band, a beep sounds to informyou that a signal was received on the sub band. qWhile pushing [SET•], push [PWR] for 1 sec. to enterinitial set mode.wPush [SET•] or [LOW•PRIO] until “SUb” appears in thedisplay as shown above.eRotate the left band’s [DIAL] to select the condition.rPush [PWR] momentarily, to exit initial set mode and returnto the previous indications.While pushing [SET• ]push [PWR] to enter initial set modeMAINT XMThe display shows that the sub band mute is turned ON and sub band busy beep is turned ON.193BASIC OPERATIONNew2001■Sub band mute/sub band busy beepUSINGINITIAL SET MODEDISPLAY SUB BAND MUTE BUSY BEEPSUb-OF OFF OFFSUb-OF SOFF ONSUb-On ON OFFSUb-On SON ONIC-2720H.qxd 02.9.9 8:12 Page 19 (1,1)

203BASIC OPERATIONNew20013■Transmitting☞NOTE: To prevent interference, listen on the channel be-fore transmitting by pushing [DUP•MONI] for 1 sec., or[MONI1(BANK)] on the microphone.qSelect the main band. (p. 11)wSet the operating frequency. (pgs. 11–13)•Select output power if desired. See section at right for details.ePush and hold [PTT] to transmit.•“$” appears.•The S/RF indicator shows the output power selection.•A one-touch PTT function is available. See p. 21 for details.•“Si” may blinks instead of the sub band’s memory channel num-ber indication according to the selected frequency band.rSpeak into the microphone using your normal voice level.•DO NOT hold the microphone too close to your mouth or speaktoo loudly. This may distort the signal.tRelease [PTT] to return to receive.■Selecting output powerThe transceiver has 3 output power levels to suit your oper-ating requirements. Low output powers during short-distancecommunications may reduce the possibility of interference toother stations and will reduce current consumption.➥Push [LOW•PRIO] once or twice to select the outputpower.*approx.•The output power can be changed while transmitting.The microphone can also be used to select output power.➥Push [HIGH4(DTCS)] for high output power;[MID5(DTCSS)] for middle output power; and[LOW6(DTMF)] for low output power.•The output power can be changed via the microphoneduring receive only.HIGH4MID5LOW6IMPORTANT! (for 50/35 W transmission):The IC-2720H is equipped with protection circuit to protectthe power amplifier circuit from high SWR (Standing WaveRatio) and temperature. When a high SWR antenna or noantenna is connected, or when the transceiver temperaturebecomes extremely high, the transceiver reduces transmitoutput power to 15 W (approx.) automatically. CAUTION: Transmitting without an antenna will damagethe transceiver.S/RF INDICATOR POWER OUTPUTVHF/UHF Taiwan50 W/35 W 25 W15 W*/15 W* 15 W*5 W*/5 W* 5 W*High:Mid:Low:IC-2720H.qxd 02.9.9 8:12 Page 20 (1,1)

213BASIC OPERATIONNew2001■One-touch PTT functionThe PTT switch can be operated as a one-touch PTT switch(each push toggles between transmit/receive). Using thisfunction you can transmit without pushing and holding thePTT switch.To prevent accidental, continuous transmissions with thisfunction, the transceiver has a time-out timer. See p. 61 fordetails.zPush [FUNC] then [PRIO3(PTT-M)] to turn theone-touch PTT function ON.•The activity indicator lights green.xPush [PTT] to transmit and push again to re-ceive.•A beep sounds when transmission is started and along beep sounds when returning to receive.•“$” blinks when transmitting with the one-touchPTT function.cPush [FUNC] then [PRIO3(PTT-M)] to turn theone-touch PTT function OFF.•The activity indicator goes out.■Audio mute functionThis function temporarily mutes the audio without disturbingthe volume setting.➥Push [FUNC] then [SQLYD(MUTE)] to muteaudio signals.•Both the left and right bands S/RF meter blink in full-scale condition. •Push [CLRA(MW)] (or any other key) to cancel thefunction.BUSYMAINT XMAINT XMMS/RF meter blinks (full-scale).MUTEMAINT XT XMindicator blinksPTT-MIC-2720H.qxd 02.9.9 8:12 Page 21 (1,1)

224REPEATER OPERATION34■GeneralRepeaters allow you to extend the operatable range, and alsosettle blind zone. Because a repeater has much higher outputpower than the typical transceiver, and installed into a broadview. Normally, a repeater has independent frequency for each re-ceive and transmit, and a subaudible tone may be requiredto accessing a repeater.Refer amateur radio handbook, ham magazine for details oflocal repeater, such as repeater input/output frequencies andlocation.•Repeater operation ﬂow chart•The IC-2720H USA version has the auto repeater function. Thus thesteps 3 and 4 may not be necessary, depending on the setting.•Repeater settings can be stored into a memory channel. Setp 3:Set the duplex (shifting) direction (– duplex or +duplex).- Set the offset frequency (shifting value), if required.Setp 4:Set the subaudible tone (repeater tone) encoder function ON.- Set the subaudible tone frequency, if required.Setp 1:Set the desired band to operate the repeater.Setp 2:Set the desired receive frequency (repeater output frequency).Repeater example;Receives the 444.540 MHz signal and the detected audio signals are transmitted on 449.540 MHz simul-taneously.Station A:Tx: 444.540 MHzRx: 449.540 MHzStation B:Tx: 444.540 MHzRx: 449.540 MHzIC-2720H.qxd 02.9.9 8:12 Page 22 (1,1)

■Accessing a repeaterqSet the receive frequency (repeater output frequency) onthe main band. (pgs. 11–13)wPush [DUP•MONI] one or two times, to select minus du-plex or plus duplex.•“DUP–” or “DUP” appears to indicate the transmit frequency forminus shift or plus shift, respectively.•When the auto repeater function is turned ON (available for theUSA version only), steps wand eare not necessary. (p. 28)ePush [TONE•DTMF] several times to turn ON the subaudi-ble tone encoder, according to repeater requirements.•“T” appears •88.5 Hz is set as the default; refer to p. 25 for tone frequency set-tings.•When the repeater requires a different tone system, see p. 26.rPush and hold [PTT] to transmit.•The displayed frequency automatically changes to the transmitfrequency (repeater input frequency).•If “OFF” appears, conﬁrm that the offset frequency (p. 27) is setcorrectly.tRelease [PTT] to receive.yPush [DUP•MONI] to check whether the other station’stransmit signal can be received directly.uTo return to simplex operation, push [DUP•MONI] once ortwice, to clear the “DUP–” or “DUP” indicator.iTo turn OFF the subaudible tone encoder, push[TONE•DTMF] several times until no tone indicators ap-pear.MAINT XDUP TMMAINT XDUP TMWhile receiving While transmittingMAINT XDUP TMPush [TONE•DTMF] once or twice“T” appearsMAINT XDUPMPush [DUP•MONI] once or twice“DUP–” or “DUP” appear234REPEATER OPERATIONNew2001IC-2720H.qxd 02.9.9 8:12 Page 23 (1,1)

244REPEATER OPERATIONNew20014zSet the receive frequency (repeater output fre-quency) on the main band. (pgs. 11–13)xPush [DUP–7(TONE)] to select minus duplex;push [DUP+ 8(TSQLS)] to select plus duplex.cPush [FUNC] then [DUP–7(TONE)] to turn ONthe subaudible tone encoder according to re-peater requirements.•Refer to p. 25 for the tone frequency setting.•When the repeater requires a different tone system,see p. 26.vPush and hold [PTT] to transmit.bRelease [PTT] to receive.nPush [MONI1(BANK)] to check whether theother station’s transmit signal can be receiveddirectly.mPush [SIMP9(TSQL)] to return to simplex opera-tion.•“DUP” or “DUP–” indicator disappears.,To turn OFF the subaudible tone encoder, push[FUNC] then [ENTC(T-OFF)].SIMP9MAINT XDUP TPush ,then .MAINT XDUPMAINT XDUPPushPushDUP–7DUP+8IC-2720H.qxd 02.9.9 8:12 Page 24 (1,1)

■Subaudible tones(Encoder function)DSubaudible tonesqSelect the main band, mode/channel you wish to set thesubaudible tones to, such as VFO mode or memory/callchannel.wPush [SET•] to enter set mode.ePush [SET•] or [DUP•MONI] several times until “T”and“rt” appear; or until “T SQL” and “Ct” appear for tonesquelch or pocket beep use.•When “d” is displayed in place of the 100 MHz digit, cancel theDTMF memory encoder in advance. (p. 50)rRotate the main band’s [DIAL] to select and set the desiredsubaudible frequency.tPush [TONE•DTMF] to exit set mode.☞NOTE: The subaudible tone encoder frequency can be setin a memory/call channel temporarily. However, the set fre-quency is cleared once another memory channel or VFOmode is selected. To store the tone frequency permanently,overwrite the channel information.zSet the main band, mode/channel you wish toset the subaudible tones to, such as VFO modeor memory/call channel.•The subaudible tone frequency is independently pro-grammed into each mode or channel.xPush [SETB(D-OFF)] to enter set mode.cPush [SETB(D-OFF)] or [ENTC(T-OFF)] severaltimes until “T”and “rt” appears; or until “T SQL”and “Ct” appears for tone squelch or pocketbeep use.•When “d” is displayed in place of the 100 MHz digit,cancel the DTMF memory encoder in advance. (p. 50)vPush [Y] or [Z] to select and set the desiredsubaudible tone frequency.•Push and hold [Y]/[Z] to change the above tonescontinuously.bPush [CLRA(MW)] to exit set mode.•Subaudible tone frequency list (unit: Hz)67.069.371.974.477.079.782.585.488.591.594.897.4100.0103.5107.2110.9114.8118.8123.0127.3131.8136.5141.3146.2151.4156.7159.8162.2165.5167.9171.3173.8177.3179.9183.5186.2189.9192.8196.6199.5203.5206.5210.7218.1225.7229.1233.6241.8250.3254.1MAINT XTMPush SETBMAINT XTM[SET• ] “T” and “rt” appearUSINGSET MODE254REPEATER OPERATIONNew2001IC-2720H.qxd 02.9.9 8:12 Page 25 (1,1)

264REPEATER OPERATIONNew20014DDTMF tones➥Push [DTMF-S], then push the keys of the de-sired DTMF digits.•The function indicator lights green.•0–9, A–D, M(E) and #(F) are available.•When “d” is displayed in place of the 100 MHz digit,cancel the DTMF memory encoder in advance.(p. 50)•Push [DTMF-S] again to return the keypad to nor-mal function control.✔For your convenient!The transceiver has 14 DTMF memory channels for au-topatch operation. See p. 48 for details.D1750 Hz toneThe microphone has 1750 Hz tone capability, used for ringtone when calling, etc.zPush [FUNC].•The function indicator lights orange.xPush [MM(TONE-1)] to transmit a 1750 Hz tonecall signal for 0.5 sec.; push and hold[0(TONE-2)] to transmit a 1750 Hz tone callsignal for an arbitrary period.•The function indicator goes out automatically.Push ,then or .TONE-1TONE-2then push desired keys.Push ,DTMF-SIC-2720H.qxd 02.9.9 8:12 Page 26 (1,1)

274REPEATER OPERATIONNew2001■Offset frequencyWhen communicating through a repeater, the transmit fre-quency is shifted from the receive frequency by an amountdetermined by the offset frequency. Independent offset frequency can be set for each operatingfrequency.qPush [MAIN•BAND] to select the desired band (left or right)as the main band.•Push [MAIN•BAND] for 1 sec. then rotate the [DIAL] to select thedesired frequency band if necessary.wSelect the desired mode/channel you wish to set the offsetfrequency to, such as VFO mode or memory/call channel.•The offset frequency can be independently programmed intoeach mode or channel.ePush [SET•] to enter set mode.rPush [SET•] or [LOW•PRIO] until “DUP” and offset fre-quency appear.tRotate the main band’s [DIAL] to set the desired offset fre-quency.yPush [TONE•DTMF] to exit set mode.zPush [BAND] to select the desired band (left orright) as the main band.•Enter the desired frequency via the keypad if neces-sary.xSelect the desired mode/channel you wish toset the offset frequency to, such as VFO modeor memory/call channel.•The offset frequency can be independently pro-grammed into each mode or channel.cPush [SETB(D-OFF)] to enter set mode.vPush [SETB(D-OFF)] or [ENTC(T-OFF)] until“DUP” and offset frequency appear.bPush [Y] or [Z] to set the desired offset.•Direct frequency entry from the keypad is not possi-ble.nPush [CLRA(MW)] to exit set mode.☞NOTE: The offset frequency can be set in a memory/callchannel temporarily. However, the set frequency is clearedonce another memory channel or VFO mode is selected.To store the offset frequency permanently, overwrite thechannel information.MAINT XDUPMPush SETBMAINT XDUPM[SET• ] [LOW•PRIO] “DUP” and offset frequency appearUSINGSET MODEIC-2720H.qxd 02.9.9 8:12 Page 27 (1,1)

284REPEATER OPERATIONNew20014■Auto repeater (U.S.A. version only)The USA version automatically activate the repeater settings(DUP– or DUP+ and tone encoder ON/OFF) when the operatingfrequency falls within the general repeater output frequencyrange and deactivate them when outside of the range.DSetting the auto repeater function ON/OFFqPush [PWR] to turn power OFF.wWhile pushing [SET•], turn power ON to enter initial setmode.ePush [SET•] or [LOW•PRIO] several times until the“rPt” display appears as shown above right.rRotate left band’s [DIAL] to select the auto repeater func-tion from “r1,” “r2” or OFF.•“r1”: auto repeater is ON, tone encoder is OFF.•“r2”: auto repeater is ON, tone encoder is ON.tPush [PWR] to exit initial set mode.DFrequency range and offset directionMAINT XDUPMMAINT XDUP TMAuto DUP set: ONAuto tone set: OFFAuto DUP set: ONAuto tone set: ONWhile pushing [SET• ]push [PWR] to enter initial set modeUSINGINITIAL SET MODEFrequency range Duplex direction145.200–145.495 MHz “DUP–” appears146.610–146.995 MHz147.000–147.395 MHz “DUP” appears442.000–444.995 MHz “DUP” appears447.000–449.995 MHz “DUP–” appearsIC-2720H.qxd 02.9.9 8:12 Page 28 (1,1)

29MEMORY OPERATIONNew20015■General descriptionThe transceiver has 212 memory channels including 10 scanedge memory channels (5 pairs), and 2 call channels. Each ofthese channels can be individually programmed with operatingfrequency (pgs. 11–13), duplex direction (p. 23) and offset(p. 27), subaudible tone encoder or tone squelch and its tonefrequency (pgs. 23, 25, 52, 53) and skip information* (p. 44). In addition, a total of 10 memory banks, A to J, are availablefor usage by group, etc.*except for scan edge memory channels.■Memory channel selectionDUsing the tuning dialqPush the desired band’s[M/CALL(MW)] severaltimes to select memorymode.•“M” indicator appearswRotate the same band’s[DIAL] to select the de-sired memory channel.•Programmed memorychannels only can be se-lected.DUsing the [Y]/[Z] keyszPush [BAND] to select the desired band asthe main band.xPush [MR/CALL] to select memory mode.cPush [Y] or [Z] to select and set the desiredmemory channel.•Pushing [Y]/[Z] for 1 sec. activates a scan.•If scan is activated, push [Y]/[Z] again or push[CLRA(MW)] to stop it.DUsing the keypadzPush [BAND] to select the desired band asthe main band.xPush [MR/CALL] to select memory mode.cPush [ENTC(T-OFF)] to activate the keypadfor numeral input.vPush 3 appropriate digit keys to input a chan-nel number. •Blank channel can be selected.•Push only 1 appropriate digit key, [MONI1(BANK)],[SCAN2(T-SCAN)], [PRIO3(PTT-M)],[HIGH4(DTCS)] or [MID5(DTCSS)] then push[MM(TONE-1)] or [SQLZ#(16KEY-L)] to select scanedge channels. “MM” and “#” can be used for “A”and “b” respectively.MR/CALLY/ZMR/CALLY/ZMAINT XMPush [M/CALL•MW] to selectmemory mode.“M” appearsIC-2720H.qxd 02.9.9 8:12 Page 29 (1,1)

305MEMORY OPERATIONNew20015■Programming a memory channel[EXAMPLE]: Programming 145.870 MHz into memory channel 20 (blank channel) via the controller.MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMPush Rotate for setting frequency, etc. Push for 1 sec.Rotate Push for 1 sec. and continue to push ➠S.MWMWBeep“BeepBeepBeep“““““BeepBeepBeep“““““SCANV/MHzMWM/CALLVFO settings, including the set mode contents such as sub-audible tone frequency, offset, can be programmed into amemory channel.qSet the desired frequency in the desired band (left or right). ➥Push the desired band’s [V/MHz•SCAN] to select VFOmode.➥Set the frequency using the same band’s [DIAL].➥Set other data (e.g. tone frequency, duplex information,etc.) if required.wPush the same band’s [M/CALL•MW] for 1 sec.•3 beeps sound•“M” indicator and the memory channel number blink.eRotate the [DIAL] to select the memory channel to be pro-grammed.•Memory channels not yet programmed are blank.rPush the [M/CALL•MW] for 1 sec. to program.•3 beeps sound•Memory channel number automatically increases when contin-uing to push [M/CALL•MW] after programming.✔CONVENIENTMemory programming can be performed in versatile wayse.g. memory channel to the same (or different) memory chan-nel, memory channel to the call channel, etc.IC-2720H.qxd 02.9.9 8:12 Page 30 (1,1)

315MEMORY OPERATIONNew2001DProgramming a memory channel via the microphone[EXAMPLE]: Programming 145.870 MHz into memory channel 20 (blank channel) via the microphone.MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMPushBeep“Beep“BeepBeepBeep“““““Push , Push thenPush then for 1 sec. and continue to push ➠The microphone can also be used to program mem-ory channels.zSet the desired frequency in VFO mode.➥Push [VFO/LOCK] to select VFO mode.➥Set the frequency using the keypad.➥Set other data (e.g. offset frequency, duplex direction, sub-audible tone encoder ON/OFF and its frequency), if neces-sary.xPush [FUNC] then [CLRA(MW)] momentarily.cPush [Y] or [Z] to select the memory channel.•Direct numeral input cannot be used.vPush [FUNC] then [CLRA(MW)] for 1 sec. to program.➥3 beeps may sound and the VFO contents (includingthe subaudible tone frequency, etc.) are programmed.➥Memory channel number increases when continuing topush [CLRA(MW)] after programming.MWIC-2720H.qxd 02.9.9 8:12 Page 31 (1,1)

325MEMORY OPERATIONNew20015■Transferring memory contentsThis function transfers a memory channel’s contents to VFO(or another memory/call channel). This is useful when search-ing for signals around a memory channel frequency and forrecalling the offset frequency, subaudible tone frequency etc.DMemory/call➪VFOqSelect the desired band’s (left or right) memory or callchannel.➥Push the desired band’s [M/CALL•MW] several times toselect memory mode or call channel, then rotate thesame band’s [DIAL] to select the desired memory or callchannel.wPush [M/CALL•MW] for 1 sec. to transfer the selectedmemory/call channel contents to the VFO.•VFO mode is selected automatically.zPush [BAND] to select the desired band asthe main band, if necessary.xSelect the memory/call channel to betransferred.➥Push [MR/CALL] to select memory mode,then select the desired memory channelvia [Y]/[Z] or keypad.➥Push [MR/CALL] for 1 sec. then push[Y]/[Z] to select the call channel.cPush [FUNC], then [CLRA(MW)] for 1 sec. totransfer the selected memory/call channelcontents to the VFO.•VFO mode is selected automatically.MR/CALLMW[Y]/[Z][EXAMPLE]: Transferring memory channel 30 contents to VFO.MAINT XMMAINT XDUP TMMAINT XDUP TMPush to select memory mode.Front panel operation:HM-133 operation:Push to select memory mode.Rotate for selecting memory channel.Select memory channel.Push for 1 sec.Push then push for 1 sec.MWM/CALLMWM/CALLIC-2720H.qxd 02.9.9 8:12 Page 32 (1,1)

5MEMORY OPERATION33New2001DMemory/call➪call/memoryqSelect the memory/call channel to be transferred.➥Push the desired band’s [M/CALL•MW] several times toselect memory mode or call channel, then rotate thesame band’s [DIAL] to select the desired memory or callchannel.wPush the same band’s [M/CALL•MW] for 1 sec.•“M” indicator and “– –” indication blink, and shows VFO condi-tions.eRotate the [DIAL] to select the target memory channel.•“C1” or “C2” blinks when the call channel is selected.•Scan edge channels, 1A/1b, 2A/2b, 3A/3b, 4A/4B, 5A/5b canalso be selected.rPush the [M/CALL•MW] for 1 sec. to transfer the selectedmemory/call channel contents to the target memory.•The targeted memory and transferred contents are indicated.zSelect the memory/call channel to be trans-ferred.➥Push [MR/CALL] to select memory mode,then select the desired memory channelvia [Y]/[Z] or keypad.➥Push [MR/CALL] for 1 sec. then push[Y]/[Z] to select the desired call channel.xPush [FUNC], then [CLRA(MW)] momentarily.•“M” indicator and “– –” indication blink, and showsVFO conditions.cPush [Y]/[Z] to select the target memorychannel.•“C1” or “C2” blinks when the call channel is selected.•Scan edge channels can also be selected.•The keypad cannot be used for the selection.vPush [FUNC] then push [CLRA(MW)] for1 sec. to transfer the selected memory/callchannel contents to the target memory.•The targeted memory and transferred contentsare indicated.MR/CALLMW[Y]/[Z][EXAMPLE]: Transferring memory channel 30 contents to channel 31.MAINT XDUP TMMAINT XMMAINT XDUP TMMAINT XDUP TMSelect the target channel. Push for 1 sec.Push then push for 1 sec.Select the memory channel, then push for 1sec.Select the memory channel, push then push .Front panel operation:HM-133 operation:MWM/CALLMWM/CALLIC-2720H.qxd 02.9.9 8:12 Page 33 (1,1)

5MEMORY OPERATION34New20015■Memory clearingContents of programmed memories can be cleared (blanked),if desired.qPush [V/MHz•SCAN] to select VFO mode in the desiredband (left or right).wPush the same band’s [M/CALL•MW] for 1 sec.•“M” indicator and the memory channel number blink.eRotate the same band’s [DIAL] to select the memory chan-nel to be cleared.•Memory channels not yet programmed are blank.rPush the same band’s [M/CALL•MW] momentarily, thenpush the [M/CALL•MW] again for 1 sec.☞This operation must be performed within 1.5 sec.•3 beeps sound, then the frequency is cleared.•“M” indicator and the channel number blink continuously.•When clearing the call channel, the current VFO conditions arere-programmed into the call channel automatically.tPush the same band’s [MAIN•BAND] or [V/MHz•SCAN], toreturn to VFO mode.☞NOTE: Be careful!— the contents of cleared memoriesCANNOT be recalled.[EXAMPLE]: Clearing memory channel 20.MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMPush to select VFO. Rotate for selecting memory channel.Push for 1 sec.Push any switch, except .Push momentarily, then push again for 1 sec.BeepBeepBeep“““““MWM/CALLMWM/CALLMWM/CALLMWM/CALLSCANV/MHzIC-2720H.qxd 02.9.9 8:12 Page 34 (1,1)

35New20015MEMORY OPERATION■Memory bank selectionThe IC-2720H has a total of 10 banks (A to J). Regular mem-ory channels, 000 to 199, are assigned into the desired bankfor easy memory management.qPush the desired band’s[M/CALL•MW] severaltimes to select memorymode, if desired.wPush the same band’s[MAIN•BAND] for 1 sec.to select memory bankcondition.•Bank initial blinkseRotate the same band’s[DIAL] to select the de-sired bank, A to J.•Banks that have no pro-grammed contents areskipped.rPush the [MAIN•BAND] to set the bank.•Initial stops blinking.tRotate the [DIAL] to select the contents in the bank.•No channel numbers are displayed for memory bank operation.yTo return to regular memory condition, push the[MAIN•BAND] for 1 sec. then push the [MAIN•BAND] mo-mentarily again.zPush [MR/CALL] to select memory mode, if de-sired.xPush [FUNC] then [MONI1(BANK)] to selectmemory bank condition.•Bank initial blinkscPush [Y]/[Z] to select the desired bank, A to J.•Only programmed memory bank can be selected.vPush [CLRA(MW)] to set the bank.•Initial stops blinking.bPush [Y]/[Z] to select the desired contents inthe bank.•No channel numbers are displayed for memorybank operation.nTo return to regular memory condition, push[FUNC], [MONI1(BANK)] then push [CLRA(MW)].BANK[Y]/[Z]MAINT XMPush [MAIN•BAND] for 1 sec.to select memory bank.Bank initial appearsIC-2720H.qxd 02.9.9 8:12 Page 35 (1,1)

365MEMORY OPERATIONNew20015■Memory bank settingqPush the desired band’s [M/CALL•MW] several times toselect memory mode, then select the desired memorychannel via the same band’s [DIAL].wPush the same band’s [MAIN•BAND] for 1 sec. •“– –” indication blinks as follows.ePush the [MAIN•BAND] again to set the channel to banksetting stand-by condition.•“– –” indication blinking stops.rPush the [M/CALL•MW] for 1 sec. then rotate the [DIAL] toselect the desired bank to be set.•Bank initial blinks as follows.tPush the [M/CALL•MW] again to set the channel into thebank.•“M” and bank initial blinking stops.yPush the [MAIN•BAND] for 1 sec. then push the[MAIN•BAND] momentarily again to return to regular mem-ory condition.uRepeat steps qto yto set another memory channel intothe same or another bank.zPush [MR/CALL] then select the desired mem-ory channel via [Y]/[Z] or keypad.•Push [BAND] to select the desired band (left orright) as the main band, in advance.xPush [FUNC] then [MONI1(BANK)].•“– –” indication blinks.cPush [CLRA(MW)] to set the channel to banksetting stand-by condition.•“– –” indication stops blinking.vPush [FUNC] then [CLRA(MW)] then push[Y]/[Z] to select the desired bank to be set.•Bank initial blinks.bPush [CLRA(MW)] to set the channel into thebank.•“M” and bank initial stops blinking.nPush [FUNC], [MONI1(BANK)] then [CLRA(MW)]to return to regular memory channel condition.mRepeat steps zto nto set an another memorychannel into the same or another bank.BANK[Y]/[Z]MWMAINT XMMAINT XMIC-2720H.qxd 02.9.9 8:12 Page 36 (1,1)

375MEMORY OPERATIONNew2001■Transferring bank contentsContents of programmed memory banks can be cleared ortransferred to another bank.INFORMATION: Even if the memory bank contents arecleared, the memory channel contents still remain pro-grammed.qSelect the desired bank contents to be transferred orerased in the desired band (left or right).➥Push the desired band’s [M/CALL•MW] several times toselect memory mode.➥Push the same band’s [MAIN•BAND] for 1 sec. then ro-tate the same band’s [DIAL] to select the desired mem-ory bank.•Bank initial blinks.➥Push the [MAIN•BAND] to select the bank then rotatethe [DIAL] to select the desired contents.•Bank initial stops blinking.wPush the [M/CALL•MW] for 1 sec.•Bank initial blinks.eRotate the [DIAL] to select the desired bank initial to trans-fer or erase.•Select “– –” indication when erasing the contents from the bank.rPush the [M/CALL•MW] again. •Bank initial or “– –” indication stops blinking.tPush the [MAIN•BAND] for 1 sec. then push the[MAIN•BAND] momentarily again to return to regular mem-ory condition.yRepeat steps qto tfor transferring or erasing an an-other banks contents.zSelect the desired bank contents in the mainband.➥Push [MR/CALL] to select memory mode.➥Push [FUNC], [MONI1(BANK)] then selectthe desired memory bank via [Y]/[Z].➥Push [CLRA(MW)] to select the bank thenselect the desired contents via [Y]/[Z].xPush [FUNC] then [CLRA(MW)].•Bank initial blinks.cPush [Y]/[Z] to select the desired bank initial totransfer or erase.•Select “– –” indication when erasing the contentsfrom the bank.vPush [CLRA(MW)].•Bank initial or “– –” indication stops blinking.bPush [FUNC], [MONI1(BANK)] then [CLRA(MW)]to return to regular memory condition.nRepeat steps zto bfor transferring or eras-ing an another banks contents.BANK[Y]/[Z]MWMAINT XMIC-2720H.qxd 02.9.9 8:12 Page 37 (1,1)

386CALL CHANNEL OPERATION56■Call channel selectionCall channel is pre-programmed memory channel that can beaccessed by simply pushing call channel button.➥Push [M/CALL•MW] sev-eral times to select thecall channel mode thenrotate the same band’s[DIAL] to select the de-sired call channel.•“C1” or “C2” appears in-stead of memory channelnumber indication.•Push the [M/CALL•MW] sev-eral times to select memorymode, or push the sameband’s [V/MHz•SCAN] to se-lect VFO mode.➥Push [MR/CALL] for 1 sec. to select the callchannel mode then push [Y]/[Z] to select thedesired call channel in the main band.•Push [MR/CALL] to select memory mode, or push[VFO/LOCK] to select VFO mode.■Call channel transferringqPush the desired band’s [M/CALL•MW] several times thenrotate the same band’s [DIAL] to select the desired callchannel.•“C1” or “C2” appears.wPush the [M/CALL•MW] for 1 sec., then rotate the [DIAL] toselect the memory channel to transfer the contents to.•“M” indicator and memory channel number blink.•To transfer to the VFO, select “– –” with the [DIAL] then push the[M/CALL•MW] for 1 sec. ePush the [M/CALL•MW] for 1 sec. to transfer the contents.zPush [MR/CALL] for 1 sec. then push [Y]/[Z]to select the desired call channel in the mainband.xPush [FUNC], [CLRA(MW)] momentarily, thenpush [Y]/[Z] to select the memory channel totransfer the contents to.•To transfer to the VFO, push [Y]/[Z] to select“– –” then push [FUNC], [CLRA(MW)] for 1 sec. cPush [FUNC], then [CLRA(MW)] for 1 sec. totransfer the contents.MR/CALLMW[Y]/[Z]MR/CALLMAINT XMPush [M/CALL•MW] several timesto select call channel.“C1” or “C2” appears✔INFORMATIONMAINT XMWhen the VFO mode is selected from the call channel, a small “c” appears instead of memory channel number. IC-2720H.qxd 02.9.9 8:12 Page 38 (1,1)

396CALL CHANNEL OPERATIONNew2001■Programming a call channelOperating frequency, duplex information, subaudible tone in-formation (tone encoder or tone squelch ON/OFF and its fre-quency) and alphanumeric channel names can also beprogrammed into the call channel.qSet the desired frequency in VFO mode.➥Push the desired band’s [V/MHz•SCAN] to select VFOmode.➥Set the frequency using the same band’s [DIAL].➥Set other data as desired.wPush the same band’s [M/CALL•MW] for 1 sec.eRotate the [DIAL] to select the desired call channel.•“M” indicator and “C1” or “C2” blink.rPush the [M/CALL•MW] for 1 sec. to program.•3 beeps sound and the unit returns to VFO mode automatically.zSet the desired frequency in VFO mode.➥Push [VFO/LOCK] to select VFO mode.➥Set the frequency.➥Set other data as desired.xPush [FUNC], then [CLRA(MW)] momentarily.cSelect the call channel via [Y] or [Z] .vPush [FUNC] then [CLRA(MW)] for 1 sec. toprogram.•3 beeps sound and the unit returns to VFO modeautomatically.MR/CALLMW[Y]/[Z][EXAMPLE]: Programming 145.120 MHz into the call channel 2 via the microphone.MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMSet the frequency.Push to select VFO mode. Push , then .Push , then push for 1 sec. ➠Push until large “C” appears.BeepBeepBeep“““““IC-2720H.qxd 02.9.9 8:12 Page 39 (1,1)

407SCAN OPERATION67■Scan typesScanning searches for signals automatically and makes iteasier to locate new stations for contact or listening purposes.There are 3 scan types and 4 resume conditions to suit youroperating needs.BAND SCAN (p. 41) Repeatedly scans all frequen-cies over the entire band.Used as the simplest scanwithout any preliminary set-tings necessary.BandedgeBandedgeScanJumpPROGRAMMED SCAN(p. 41)Repeatedly scans betweentwo user-programmed fre-quencies. Used for checkingfor frequencies within a speci-fied range such as repeateroutput frequencies, etc. 5 pairs of scan edges areavailable and scans 1A–1b(P1), 2A–2b (P2), 3A–3b (P3),4A–4b (P4), 5A–5b (P5).BandedgeBandedgeScan edgesScanJump1A2A3A4A5A1b2b3b4b5bStart EndMEMORY SCAN (p. 41) Repeatedly scans memorychannels except those set asskip channels. Used for often-called channels and for by-passing normally busychannels such as repeaterfrequencies.SKIPSKIPM 0 M 4M 1 M 2 M 3M 5M 199M 6SCAN RESUMECONDITION (p. 45)4 resume conditions are avail-able: 3 timer scans and pausescan. When receiving a sig-nal, pause scan pauses untilthe signal disappears; timerscans pause for 5, 10 or15 sec.PausescanReceivinga signalTimerscanPausing2 sec.☞NOTE: A tone scan function is available to search for subaudible tones (e.g. when you want to ﬁnd a subaudible tone fre-quency necessary to open a repeater). See p. 55 for details.IC-2720H.qxd 02.9.9 8:12 Page 40 (1,1)

417SCAN OPERATIONNew2001■Scan start/stopDPreparationScan resume condition (p. 41); program the scan edges(pgs. 42, 43); program 2 or more memory channels (pgs. 30,31); set skip settings, if desired (p. 44).DOperationqSelect VFO mode for full/programmed scan with[V/MHz•SCAN]; or memory mode for memory scan with[M/CALL•MW] in the desired band.•Select the desired bank with the same band’s [MAIN•BAND] forbank scan.wSet the squelch to the point where noise is just muted.ePush the [V/MHz•SCAN] for 1 sec. to start the scan.•To change the scanning direction, rotate the same band’s [DIAL].•The memory channel readout blinks the scan type as follows:rPush [SET•] to switch full and programmed scan (P1,P2, P3, P4 and P5), if VFO is selected in step q.tTo stop the scan, push the [V/MHz•SCAN].zPush [VFO/LOCK] to select VFO mode forfull/programmed scan; push [MR/CALL] to selectmemory mode for memory scan, in the mainband.•Push [FUNC] then [MONI1(BANK)] to select a bankfor bank scan.xPush [SQLYD(MUTE)] or [SQLZ#(16KEY-L)] toset the squelch to the point where noise is justmuted.cPush [SCAN2(T-SCAN)] to start the scan.•Push [Y] or [Z] for 1 sec. also starts the scan.vPush [SETB(D-OFF)] to switch full and pro-grammed scan (P1, P2, P3, P4 and P5), if VFOis selected in step z.bTo stop the scan push [SCAN2(T-SCAN)] or[CLRA(MW)].SCAN2SETBMAINT XMMAINT XMMAINT XMMAINT XM• During full scan • During programmed scan • During memory scan • During bank scanIndicates scan edge channels.• P1 stands for 1A/1b• P1 to P5 are available when they are programmed, and switches with [SET• ].Indicates bank initial.Push [SET• ] to select “AL” (full) or programmed scan (P1, P2, P3, P4 and P5) in sequence.IC-2720H.qxd 02.9.9 8:12 Page 41 (1,1)

427SCAN OPERATIONNew20017■Scan edges programmingScan edges can be programmed in the same manner asmemory channels. Scan edges are programmed into scanedges, 1A/1b to 5A/5b, in memory channels.qSet the edge frequency of the desired frequency range inVFO mode:➥Set the frequency using the desired band’s [DIAL].➥Set other data (e.g. repeater settings, etc.) if desired.wPush the same band’s [M/CALL•MW] for 1 sec.•“M” indicator and channel number blink.eRotate the [DIAL] to select one of scan edge channel, 1A,2A, 3A, 4A or 5A.rPush the [M/CALL•MW] for 1 sec. to program.•3 beeps sound and VFO is automatically selected.•Scan edge 1b, 2b, 3b, 4b or 5b is automatically selected whencontinuing to push the [M/CALL•MW] after programming.tTo program a frequency for the other pair of scan edges,1b, 2b, 3b, 4b or 5b, repeat steps qand r.•If the same frequency is programmed into a pair of scan edges,programmed scan will not function.[EXAMPLE]: Programming 145.300 MHz into scan edges 1A.MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMPush for 1 sec.Rotate for setting frequency, etc. RotatePush for 1 sec. and continue to push ➠BeepBeepBeep“Beep“““““MWM/CALLMWM/CALLIC-2720H.qxd 02.9.9 8:12 Page 42 (1,1)

437SCAN OPERATIONNew2001DProgramming scan edges via microphonezSet the desired frequency in VFO mode.➥Push [VFO/LOCK] to select VFO mode.➥Set the frequency via the keypad or [Y]/[Z].xPush [FUNC] then [CLRA(MW)] momentarily.cPush [Y] or [Z] to select scan edge channels,1A, 2A, 3A, 4A or 5A.vPush [FUNC], then push [CLRA(MW)] for 1 sec.to program.•3 beeps sound and VFO is automatically selected.•Memory channel number advances to the next scanedge channel, 1b, 2b, 3b, 4b or 5b when continuing topush [CLRA(MW)] after programming.bTo program a frequency for the other scan edge channels,repeat steps zto v.MW[EXAMPLE]: Programming 145.800 MHz into scan edge 1b.MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMPush Push Push then momentarilyPush Push then for 1 sec. and continue to push ➠Beep“BeepBeepBeep“““““IC-2720H.qxd 02.9.9 8:12 Page 43 (1,1)

447SCAN OPERATIONNew20017■Skip channel settingThe memory skip function speeds up scanning by checkingonly those memory channels not set as skip channels. Setskip channels as follows.qSelect a memory channel in the desired band:➥Push the desired band’s [M/CALL•MW] to select mem-ory mode.➥Rotate the same band’s [DIAL] to select the desiredchannel to be a skip channel.wPush [SET•] to enter set mode.ePush [SET•] or [LOW•PRIO] several times until “CHS”appears as shown above.rRotate the [DIAL] to turn the skip function ON or OFF forthe selected channel.•“~” appears : The channel is skipped during scan. (CHS-On)•“~” disappears : The channel is scanned during scan.(CHS-OF)tPush [TONE•DTMF] to exit set mode.zSelect a memory channel.➥Select memory mode by pushing [MR/CALL].➥Push [Y] or [Z] to select the desired channelto be a skip channel.•Direct memory channel selection is also available.xPush [SETB(D-OFF)] to enter set mode.cPush [SETB(D-OFF)] or [ENTC(T-OFF)] severaltimes until “CHS” appears as shown at left.vPush [Y] or [Z] to set or cancel the skip setting.•See item rat left for skip indicator details.bPush [CLRA(MW)] to exit set mode.SETBMAINT XMSKIPThe display shows that memo-ry channel 1 is set as a skip channel.USINGSET MODEIC-2720H.qxd 02.9.9 8:12 Page 44 (1,1)

457SCAN OPERATIONNew2001■Scan resume conditionThe scan resume condition can be selected as timer or pausescan. The selected resume condition is also used for prioritywatch. (p. 47)qPush [MAIN•BAND] to select the desired band (left or right)as the main band.wPush [SET•] to enter set mode.ePush [SET•] or [LOW•PRIO] several times until “SCt”or “SCP” appears as shown above.•When “d” is displayed in place of the 100 MHz digit, cancel theDTMF memory encoder in advance. (p. 50)rRotate the main band’s [DIAL] to set the desired timer:•“SCt-15”: Scan pauses 15 sec. while receiving a signal.•“SCt-10”: Scan pauses 10 sec. while receiving a signal.•“SCt-5”: Scan pauses 5 sec. while receiving a signal.•“SCP-2”: Scan pauses until the signal disappears and thenresumes 2 sec. later.tPush [TONE•DTMF] to exit set mode.zPush [BAND] to select the desired band (left orright) as the main band.xPush [SETB(D-OFF)] to enter set mode.cPush [SETB(D-OFF)] or [ENTC(T-OFF)] severaltimes until “SCt” or “SCP” appears as shown atleft.vPush [Y] or [Z] to select the scan resume condi-tion.•See item rat left for scan resume condition details.bPush [CLRA(MW)] to exit set mode.SETBMAINT XMThe display shows that the scan will resume 15 sec. after it stops.USINGSET MODEIC-2720H.qxd 02.9.9 8:12 Page 45 (1,1)

468PRIORITY WATCH78■Priority watch typesPriority watch checks for signals on a VFO frequency every5 sec. while operating in memory mode. The transceiver has3 priority watch types to suit your needs. You can also trans-mit on the VFO frequency while the priority watch operates.The watch resumes according to the selected scan resumecondition. See previous page for details.☞NOTES:➧If the pocket beep function is activated, the transceiverautomatically selects the tone squelch function when pri-ority watch starts.MEMORY CHANNEL WATCHWhile operating on a VFO fre-quency, priority watch checks fora signal on the selected memorychannel every 5 sec.MEMORY SCAN WATCHWhile operating on a VFO fre-quency, priority watch checks forsignals on each memory chan-nel in sequence.•The memory skip function is usefulto speed up the scan.CALL CHANNEL WATCHWhile operating on a VFO fre-quency, priority watch checks forsignals on the call channel every5 sec.5 sec.VFOfrequency50 msec.Memorychannel5 sec. 50 msec.VFOfrequencySKIPMch 1Mch 2Mch 3Mch 1995 sec.VFOfrequency50 msec.CallchannelIC-2720H.qxd 02.9.9 8:12 Page 46 (1,1)

478PRIORITY WATCHNew2001■Priority watch operationqSelect VFO mode; then, set an operating frequency in thedesired band (left or right).wSet the watching channel(s).For memory channel watch:Select the desired memory channel.For memory scan watch:Select memory mode; then, push the same band’s[V/MHz•SCAN] for 1 sec. to start memory scan.For call channel watch:Select the desired call channel by pushing the sameband’s [M/CALL•MW] once or twice, then rotate the [DIAL].ePush [LOW•PRIO] for 1 sec. to start the watch.•The transceiver checks the memory or call channel every 5 sec.•The watch resumes according to the selected scan resume con-dition. (p. 45)•While the watch is pausing, pushing the [M/CALL(PRIO)] re-sumes the watch manually.rPush [LOW•PRIO] for 1 sec. to stop the watch.zSelect VFO mode; then, set the desired fre-quency.xSet the watching channel(s).For memory channel watch:Push [MR/CALL] then [Y] or [Z] to select the de-sired memory channel.For memory scan watch:Push [MR/CALL], then push [SCAN2] to start thememory scan.For call channel watch:Push [MR/CALL] for 1 sec. then push [Y] or [Z]to select the call channel.cPush [PRIO3(PTT-M)] to start the watch.•The transceiver checks the memory or call channelevery 5 sec.•The watch resumes according to the selected scan re-sume condition. (p. 45)•To resume the watch manually when paused, push[PRIO3(PTT-M)] or [CLRA(MW)].vTo stop the watch, push [CLRA(MW)] once (ortwice while watch is paused).PRIO3IC-2720H.qxd 02.9.9 8:12 Page 47 (1,1)

489DTMF MEMORY ENCODER89■Programming a DTMF codeDTMF tones are used for autopatching, controlling otherequipment, etc. The transceiver has 14 DTMF memory chan-nels (d0–dd) for storage of often-used DTMF codes of up to24 digits.qPush [TONE•DTMF] for 1 sec. to turn the DTMF encoderON.•Select the main band in advance, by pushing the desired band’s[MAIN•BAND], if necessary.•“d” appears in place of the main band’s 100 MHz digit.wPush [SET•] to enter the DTMF memory programmingcondition.•The DTMF memory channel indication blinks.eRotate the main band’s [DIAL] to select the desired DTMFmemory channel.rPush [SET•].•The ﬁrst digit blinks.tRotate the [DIAL] to select the desired code.yPush [SET•] to select the next digit.•Pushing [LOW•PRIO] move the cursor backward.uRepeat the steps tand yto set the desired DTMF tonesequence.•The S/RF indicator shows the digit group. The indication in-creases every 6 digits.iPush [TONE•DTMF] to exit DTMF memory programmingcondition.•Return to the previous indication as in step q.[EXAMPLE]: Programming “5428AB453” into DTMF memory channel “d4.”MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMPushPush then rotate Repeat the previous step until the desired code is entered. Push any switch except andRotatePush for 1 sec.TONEDTMFLOWPRIOSETSET SETIC-2720H.qxd 02.9.9 8:12 Page 48 (1,1)

499DTMF MEMORY ENCODERNew2001DProgramming a DTMF code— via microphonezPush [FUNC] then [LOW6(DTMF)] to turn theDTMF encoder ON.•“d” appears in place of the main band’s 100 MHz digit.xPush [SETB(D-OFF)] to enter the DTMF memoryprogramming condition.cPush [Y] or [Z] to select the desired DTMFmemory channel.vPush the desired digit keys.•When the ﬁrst digit is input, previous memory contentsare cleared automatically.•“E” stands for “MM” and “F” stands for “# .”•Push [Y]/[Z] and repeat this step if you make a mistake.•The S/RF indicator shows the digit group. The indicationincreases every 6 digits.bPush [VFO/LOCK] to exit the programming condition.•The [CLRA(MW)] key cannot be used to exit. If pushed, code “A”is input. Reprogram in such a case.DTMF[EXAMPLE]: Programming “5428AB453” into DTMF memory channel “d4.”MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMPushPush PushPushPush then .IC-2720H.qxd 02.9.9 8:12 Page 49 (1,1)

509DTMF MEMORY ENCODERNew20019■Transmitting a DTMF codeDAutomatic transmission (DTMF memory)qPush [TONE•DTMF] for 1 sec. to turn the DTMF memoryencoder ON.• “d” appears in place of the main band’s 100 MHz digit.wPush [SET•] to enter DTMF memory programming condition.eRotate main band’s [DIAL] to select the desired DTMFmemory channel.rPush [PTT] to transmit the selected DTMF memory content.tPush [TONE•DTMF] for 1 sec. to cancel the DTMF en-coder.•When the DTMF encoder is turned ON continuously, each pushof the PTT transmits the previously selected DTMF code.zPush [FUNC] then [LOW6(DTMF)] to turn theDTMF memory encoder ON.•“d” appears in place of the main band’s 100 MHz digit.xPush [SETB(D-OFF)] to enter the DTMF memoryprogramming condition.cPush [Y] or [Z] to select the desired channel.vPush [PTT] to transmit the selected memory.•Exit the programming condition automatically.•Each push of [PTT] transmits the DTMF code.bPush [FUNC] then [SETB(D-OFF)] to cancel theDTMF memory encoder.•When the DTMF encoder is turned ON continuously,each push of the PTT transmits the previously se-lected DTMF code.DTransmitting a DTMF memory directlyzPush [FUNC] then [LOW6(DTMF)] to turn theDTMF memory encoder ON.•“d” appears in place of the main band’s 100 MHz digit.xPush [DTMF-S] to turn the DTMF memory di-rect selection ON.•The function indicator (microphone) lights green.cPush the desired DTMF channel.•“0” to “9” and “A” to “D” are available for DTMFmemory channels.•The selected DTMF code is automatically transmit-ted without pushing PTT.NOTE: When no DTMF code programmedchannel number is pushed, it transmits the rela-tive DTMF code as the manual transmission de-scribed in the next page.vPush [DTMF-S] again to deactivate the DTMFmemory direct selection.bPush [FUNC] then [SETB(D-OFF)] to cancelthe DTMF memory encoder.DTMF-SDTMFIC-2720H.qxd 02.9.9 8:12 Page 50 (1,1)

519DTMF MEMORY ENCODERNew2001DManual transmissionzDeactivate the DTMF memory encoder bypushing [FUNC] then [SETB(D-OFF)].xPush [DTMF-S] to turn the DTMF direct selec-tion ON.•The function indicator (microphone) lights green.cPush one of “0” to “9” and “A” to “F” keys mo-mentarily, then push the desired DTMF keys,0–9 and A to F.•A: [CLRA(MW)] B: [SETB(D-OFF)], C: [ENTC(T-OFF)] D: [SQLYD(MUTE)], E: [MM(TONE-1)] F: [SQLZ#(16KEY-L)]•Automatically transmits without pushing PTT.•The ﬁrst code, one of “A” to “F,” is not transmitted.DTMF code transmission starts from the 2nd code.vPush [DTMF-S] again to deactivate the DTMFdirect selection.■DTMF speedThe rate at which DTMF memories send individual DTMFcharacters can be set to accommodate operating needs.qPush [PWR] for 1 sec. to turn power OFF.wWhile pushing [SET•], push [PWR] for 1 sec. to turnpower ON and enter initial set mode.ePush [SET•] or [LOW•PRIO] several times until “dtd”appears as shown above.rRotate the left band’s [DIAL] to select the desired speedas shown in the table below.tPush [PWR] to exit initial set mode.cps=characters/secMAINT XMThe display shows the fastest DTMF speed is selected.USINGINITIAL SET MODEDTMF-SDISPLAY INTERVAL SPEEDdtd-- 1 100 msec. 5.0 cpsdtd-- 2 200 msec. 2.5 cpsdtd-- 3 300 msec. 1.6 cpsdtd-- 5 500 msec. 1.0 cpsIC-2720H.qxd 02.9.9 8:12 Page 51 (1,1)

5210POCKET BEEP AND TONE SQUELCH910■Pocket beep operationThis function uses subaudible tones for calling and can beused as a “common pager” to inform you that someone hascalled while you were away from the transceiver.DWaiting for a call from a speciﬁc stationqSet the operating frequency.wPush [SET•] to enter set mode in the main band.ePush [SET•] or [LOW•PRIO] several times until “Ct” fortone squelch or “dt” for DTCS squelch appears.rRotate the main band’s [DIAL] to select the desired tonesquelch frequency.tWhen operating the pocket beep function with DTCSsquelch, push [SET•] once then rotate [DIAL] to selectthe DTCS polarity.yPush [TONE•DTMF] to exit set mode.uPush [TONE•DTMF] several times until “T SQLS” or“SDTCS” are displayed to turn ON the pocket beep withtone squelch or DTCS squelch, respectively.iWhen a signal with the matched tone is received, thetransceiver emits beep tones and blinks “S”.•Beep tones sound for 30 sec. and “S” blinks. To stop thebeeps and blinking manually, push any key. When the beeptones are not stopped manually, “S” continues blinking until[PTT] is pushed (see step o).oPush [PTT] to answer.•“S” disappears and cancels the pocket beep function auto-matically.!0 Push [TONE•DTMF] several times until “T SQL” or “DTCS”disappears to cancel the tone squelch or DTCS squelchfunction.MAINT XT SQLMMAINT XDTCSMPush [TONE•DTMF] several times to select the pocket beepfunction with tone squelch or DTCS squelch.Appears when the pocket beepwith tone squelch is activated.Appears when the pocket beepwith DTCS squelch is activated.MAINT XDTCSMDTCS polarity settingMAINT XT SQLMMAINT XDTCSMTone squelch frequency setting DTCS code settingIC-2720H.qxd 02.9.9 8:12 Page 52 (1,1)

5310 POCKET BEEP AND TONE SQUELCHNew2001zSet the operating frequency.xProgram the CTCSS tone frequency or DTCScode in set mode.➥Push [SETB(D-OFF)] to enter set mode.➥Push [SETB(D-OFF)] or [ENTC(T-OFF)]several times until “Ct” for tone squelch or“dt” for DTCS squelch appears.•“T SQL” blinks when tone squelch (“Ct”), or“DTCS” blinks when DTCS squelch (“dt”) is se-lected.➥Push [Y]/[Z] to select the desired tone fre-quency or DTCS code.➥Push [SETB(D-OFF)] to select “dtP” thenpush [Y]/[Z] to select the DTCS polarity.➥Push [CLRA(MW)] to exit set mode.cPush [FUNC] then push [DUP+ 8(TSQLS)]or [MID5(DTCSS)] to turn ON the pocketbeep with tone squelch or DTCS squelch, re-spectively.vWhen a signal with the matched tone is re-ceived, the transceiver emits beep tones for30 sec. and blinks “S.”bPush [PTT] to answer or push [CLRA(MW)] tostop the beeps and blinking.•“S” disappears and cancels the pocket beepfunction automatically.nTo cancel the tone squelch or DTCS squelchfunction, push [FUNC] then [ENTC(T-OFF)]. •“T SQL” or “DTCS” disappears DAvailable tone frequency listNOTE: The transceiver has 50 tone frequencies and con-sequently their spacing is narrow compared to units having38 tones. Therefore, some tone frequencies may receiveinterference from adjacent tone frequencies.To prevent interference from adjacent tone frequencies,using the frequencies as in the following table, is recom-mended.DCalling a waiting station using pocket beepA subaudible tone matched with the station’s CTCSS tone fre-quency or 3-digit DTCS code with polarity is necessary. Usethe tone squelch on the next page or a subaudible tone en-coder (pgs. 25, 26).67.069.371.974.488.591.594.897.4114.8118.8123.0127.3151.4156.7162.2167.9203.5210.7218.1225.777.079.782.585.4100.0103.5107.2110.9131.8136.5141.3146.2173.8179.9186.2192.8233.6241.8250.3• Recommended tone frequencies67.069.371.974.477.079.782.585.488.591.594.897.4100.0103.5107.2110.9114.8118.8123.0127.3131.8136.5141.3146.2151.4156.7159.8162.2165.5167.9171.3173.8177.3179.9183.5186.2189.9192.8196.6199.5203.5206.5210.7218.1225.7229.1233.6241.8250.3254.1TSQLSDTCSSIC-2720H.qxd 02.9.9 8:12 Page 53 (1,1)

5410POCKET BEEP AND TONE SQUELCHNew200110■Tone/DTCS squelch operationThe tone or DTCS squelch opens only when receiving a sig-nal with the same pre-programmed subaudible tone or DTCScode, respectively.qSet the operating frequency in the main band.wProgram the CTCSS tone frequency or DTCS code in setmode.•See p. 52 for programming details.ePush [TONE•DTMF] several times until “T SQL” or “DTCS”appears in the function display.rWhen a signal with the matched tone is received, thesquelch opens and the signal can be heard.•When the received signal includes an unmatched tone, thesquelch does not open. However, the S/RF indicator shows thereceived signal strength.•To open the squelch manually, push [DUP•MONI].tOperate the transceiver in the normal way (push [PTT] totransmit; release [PTT] to receive).yTo cancel the tone squelch, push [TONE•DTMF] severaltimes until “T SQL” or “DTCS” disappears.zSet the operating frequency.xProgram the CTCSS tone frequency or DTCScode in set mode.•See p. 53 for programming details.cPush [FUNC] then [SIMP9(TSQL)] or [HIGH4(DTCS)]to turn the tone squelch or DTCS squelch ON.vWhen a signal with the matched tone is re-ceived, the squelch opens and the signal can beheard.•When the received signal includes an unmatchedtone, the squelch does not open. However, the S/RFindicator shows the received signal strength.•To open the squelch manually, push [MONI1(BANK)].bOperate the transceiver in the normal way (push[PTT] to transmit; release [PTT] to receive.nTo cancel the tone squelch, push [FUNC] then[ENTC(T-OFF)].•“T SQL” or “DTCS” disappears TSQLDTCSNOTE: The DTCS squelch operation on sub band will notbe performed during DTCS transmission, due to the sameencoder/decoder circuit is used for both main and subbands. And the tone squelch operation on sub band maynot be performed correctly during DTCS transmission.IC-2720H.qxd 02.9.9 8:12 Page 54 (1,1)

5510 POCKET BEEP AND TONE SQUELCHNew2001■Tone scanBy monitoring a signal that is being operated with pocketbeep, tone or DTCS squelch function, you can determine thetone frequency or DTCS code necessary to open a squelch.qSet the desired operating frequency or memory channel tobe checked for a tone frequency or code in the main band.wPush [TONE•DTMF] several times to select the tone type,tone squelch or DTCS, to be scanned.•Either “T SQL” or “DTCS” appears ePush the main band’s [V/MHz•SCAN] for 1 sec. to start thetone scan.•To change the scanning direction, rotate [DIAL].rWhen the CTCSS tone frequency or 3-digit DTCS code ismatched, the squelch opens and the tone frequency istemporarily programmed into the selected condition suchas memory or call channel.•The tone scan pauses when a CTCSS tone frequency or 3-digitDTCS code is detected.•The decoded CTCSS tone frequency or 3-digit DTCS code isused for the tone encoder or tone encoder/decoder dependingon the selected tone condition or type in step w. -“T SQL” : CTCSS tone encoder/decoder-“DTCS” : DTCS tone encoder/decodertPush [V/MHz•SCAN] to stop the scan.zSet the frequency or memory channel to bechecked for a tone frequency.xSelects the tone type to be scanned.•Push [FUNC] then push; [SIMP9(TSQL)] for tonesquelch; [HIGH4(DTCS)] for DTCS squelch.cPush [FUNC] then [SCAN2(T-SCAN)] to startthe tone scan.vWhen the tone frequency is matched, thesquelch opens and the tone frequency is pro-grammed into the selected mode such asmemory or call channel.bPush [CLRA(MW)] to stop the scan.T-SCANMAINT XT SQLMMAINT XDTCSMDuring CTCSS frequency scan During DTCS code scanPush [V/MHz•SCAN] for 1 sec. to start tone scan.☞NOTE: The decoded tone frequency is programmed tem-porarily when a memory or call channel is selected. How-ever, this will be cleared when the memory/call channel isre-selected.IC-2720H.qxd 02.9.9 8:12 Page 55 (1,1)

5611OTHER FUNCTIONS1011MAINT XMMAINT XMMAINT XTMMAINT XMMAINT XMMAINT XMMAINT XT SQLMMAINT XMMAINT XMMAINT XMMAINT XDUPMMAINT XDTCSMMAINT XDTCSMMAINT XM• Mode selection**• Display dimmer • Display color • Repeater tone frequency• Narrow setting‡• Channel skip setting†• 1st Lo frequency• Tone squelch frequency• Weather alert*• Scan resume timer • Tuning step • Offset frequency • DTCS polarity• DTCS code*Available for USA version only.†Appears when accessing set mode from memory mode only.‡Available for the USA version and appears when accessing set mode from left band only.**Does not appear when accessing set mode from 900 MHz band. : Push (front panel); or (microphone)SET: Push (front panel); or (microphone)LOWPRIO■Set mode•Set mode operationqPush the desired band’s [MAIN•BAND] to select the mainband.wPush [SET•] to enter the set mode.ePush [SET•] or [LOW•PRIO] to select the desired item.rRotate the main band’s [DIAL] to select the condition orvalue.tPush [TONE•DTMF] to exit set mode.•Set mode itemszPush [BAND] to select the main band.xPush [SETB(D-OFF)] to enter set mode.cPush [SETB(D-OFF)] or [ENTC(T-OFF)] to selectthe desired item.vPush [Y] or [Z] to select the condition or value.bPush [CLRA(MW)] to exit set mode.SETBIC-2720H.qxd 02.9.9 8:12 Page 56 (1,1)

5711 OTHER FUNCTIONSNew2001DDDisplay dimmerAdjust to suit lighting conditions.The levels 1 (dark) to 4 (bright: default) are available.DDDisplay colorThe display color can be set to amber (default) or green.DDRepeater tone Sets subaudible tone frequency (encoder only) for repeateroperation. Total of 50 tone frequencies (67.0–254.1 Hz) areavailable. (default: 88.5 Hz)DDTone squelch toneSets subaudible tone frequency (both encoder and decoder)for tone squelch operation. Total of 50 tone frequencies(67.0–254.1 Hz) are available. (default: 88.5 Hz)•Available subaudible tone frequencies DDDTCS code Sets DTCS code (both encoder and decoder) for DTCSsquelch operation. Total of 104 codes are available.(default: 023)MAINT XDTCSM67.069.371.974.477.079.782.585.488.591.594.897.4100.0103.5107.2110.9114.8118.8123.0127.3131.8136.5141.3146.2151.4156.7159.8162.2165.5167.9171.3173.8177.3179.9183.5186.2189.9192.8196.6199.5203.5206.5210.7218.1225.7229.1233.6241.8250.3254.1MAINT XT SQLMMAINT XTMMAINT XMMAINT XM• Amber setting • Green settingMAINT XMIC-2720H.qxd 02.9.9 8:12 Page 57 (1,1)

5811OTHER FUNCTIONSNew200111DDDTCS polaritySets DTCS polarities for transmission and reception from“nn,” “nr,” “rn” and “rr.”(default: nn)DDOffset frequencySets the duplex offset frequency within 0 to 20 MHz range.During duplex (repeater) operation, transmit frequency (or re-ceive when reverse function is set to ON) shifts the set fre-quency. (default value may differ depending on operating frequencyband and versions)DDTuning stepSelects tuning step from 5, 10, 12.5, 15, 20, 25, 30 and50 kHz for [DIAL] or [Y]/[Z] operation. (default value may differdepending on operating frequency band and versions) DDScan resume timerSelects scan resume timer from SCT-15 (default), SCT-10,SCT-5 and SCP-2. •SCT-15/10/5 : Scan pauses for 15/10/5 sec., then re-sumes.•SCP-2 : Pause on a signal until signal disap-pears, then resumes 2 sec. after the sig-nal disappears.DDChannel skip settingSets channel skip setting from ON and OFF for memory skipscan operation. This item appears when set mode is accessed from memorymode only.MAINT XMMAINT XMSKIP• “~” appears when set to “On.”• Default settingMAINT XMMAINT XMMAINT XMMAINT XDUPMAINT XDTCSMMAINT XDTCSM• Transmit : normal Receive : normal (default)• Transmit : normal Receive : reverseIC-2720H.qxd 02.9.9 8:12 Page 58 (1,1)

5911 OTHER FUNCTIONSNew2001DDWide/Narrow setting (Left band only)Sets both the transmission and reception passband widthfrom wide and narrow. When narrow is set, the transmission deviation and receptionpassband width become half of the wide setting (approx.). This setting can be set for each memory, call and VFO inde-pendently. This item appears when set mode is accessed from left bandonly.DDOperating mode settingNOTE: This item appears only when accessing set modefrom other than 900 MHz band.Selects the operating mode for the desired frequency bandfrom FM and AM.The selected mode is used for the previously selected oper-ating frequency band— for example, when entering set modefrom 127 MHz band and AM is selected, AM is automaticallyselected even FM is selected in other frequency bands.This setting can be set for each memory, call and VFO inde-pendently. DDWeather alert functionTurns weather alert function ON and OFF.DD1st Lo frequency selectionSelects the 1st Lo (Local Oscillator) frequency from normal(n) and reverse (r).By changing local oscillator frequency, the transceiver mayreject interference or image frequencies, such as from otherstations spurious or the transceiver’s internal oscillator. This item can also be switched by pushing [SET•] whiletransmitting (pushing and holding [PTT]) for sub band (non-main band) setting. It is helpful in case the transceiver receiving heterodyne spu-rious emissions, or receiving on an image frequency fromown transmitter.The local oscillator frequency can be switched when selectinga frequency within 118.000 to 160.000 MHz range in leftband, or 400.000 to 450.000 MHz range in right band only.MAINT XMMAINT XMMAINT XMMAINT XMU.S.A. version onlyMAINT XMMAINT XAMMMAINT XMIC-2720H.qxd 02.9.9 8:12 Page 59 (1,1)

6011OTHER FUNCTIONSNew200111■Initial set modeThe initial set mode is accessed at power ON and al-lows you to set seldom-changed settings. In this way,you can “customize” transceiver operations to suit yourpreference and operating style.•Initial set mode itemsDDEntering initial set modeqWhile pushing [SET•] push [PWR] for 1 sec. to enterinitial set mode.wPush [SET•] or [LOW•PRIO] to select the desired item.eRotate left band’s [DIAL] to select the condition or value.rPush [PWR] momentarily to exit initial set mode.ATPOWER ONMAINT XMAINT XMAINT XDUPMAINT XMAINT XMAINT XMAINT XMAINT XMAINT XMAINT XMAINT XMAINT XMAINT X• Active band• Key-touch beep • Time-out timer • Auto repeater*• Squelch attenuator• Microphone sensitivity• Sub band mute• Auto power off• DTMF speed• Squelch delay • Packet operation band • Data speed• Cooling fan*Available in the USA version only.: Push (front panel); or (microphone)SET: Push (front panel); or (microphone)LOWPRIOIC-2720H.qxd 02.9.9 8:12 Page 60 (1,1)

6111 OTHER FUNCTIONSNew2001DDKey-touch beepThe key-touch beep can be turned OFF for silent operation.(default: ON)DDTime-out timerTo prevent accidental prolonged transmission, etc., the trans-ceiver has a time-out timer. This function cuts a transmissionOFF after 1–30 min. of continuous transmission. This timercan be cancelled.•TOT-OF : The time-out timer is turned OFF. (default)•TOT-3/5/15/30 : The transmission is cut OFF after theset period elapses.DDAuto repeaterThe auto repeater function automatically turns ON or OFF theduplex operation with a speciﬁed shift direction and tone en-coder, when the operating frequency falls within or outside of145.200–145.495, 146.610–146.995, 147.000–147.395,442.000–444.995, and 447.000–449.995 MHz range. The off-set and repeater tone frequencies are not changed by theauto repeater function, reset these frequencies, if necessary.•OF : The auto repeater function is turned OFF.•r1 : Activates for duplex only. (default)•r2 : Activates for duplex and tone.DDAuto power OFFThe transceiver can be set to automatically turn OFF after aspeciﬁed period with a beep when no key operations are per-formed.30 min., 1 hour, 2 hours and OFF (default) can be speciﬁed.The speciﬁed period is retained even when the transceiver isturned OFF by the auto power OFF function. To cancel thefunction, select “OF” in this set mode.MAINT XMMAINT XMMAINT XMMAINT XDUPMU.S.A. version onlyMAINT XMMAINT XMMAINT XMMAINT XMIC-2720H.qxd 02.9.9 8:12 Page 61 (1,1)

6211OTHER FUNCTIONSNew200111DDCooling fan controlSelects the cooling fan control condition from Auto and ON.•Auto (At) : The fan rotates during transmit and for 2 min.after transmission.•ON (On) : The fan continuously rotates. DDData transmission speedSelects the data transmission speed for packet operationfrom 1200 bps (default) and 9600 bps.DDPacket operation bandSelects the packet operation band from auto, right and left.•Auto (At) : The main band is used for packet op-eration.•Left (L)/Right (r) : The selected left or right band canonly be operated for packet.DDSquelch delaySelects squelch delay from short and long to prevent re-peated opening and closing of the squelch during receptionof the same signal.•S : Short squelch delay. (default)•L : Long squelch delayDDMicrophone sensitivitySelects the microphone sensitivity from high (H) and low (L)to suits your preference.DDSquelch attenuatorTurns the squelch attenuator function ON and OFF.•ON : The squelch attenuator activates when [SQL]control is set between 12 o’clock and fullyclockwise position. (default)•OF : The squelch attenuator does not function.MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMIC-2720H.qxd 02.9.9 8:12 Page 62 (1,1)

6311 OTHER FUNCTIONSNew2001DDActive bandSelects the frequency selecting condition via [DIAL] or [Y]/[Z]on the microphone from all (AL) and single (SI).•All (AL) : The operating frequency can be selectedcontinuously. (default)•Single (SI) : The operating frequency can be selectedwithin the current band. Pushing[MAIN•BAND] for 1 sec. then tuning dial rota-tion is necessary for frequency band selection.DDDTMF speedThe rate at which DTMF memories send individual DTMFcharacters can be set to accommodate operating needs.•1 : 100 msec. interval; 5.0 cps speed (default)•2 : 200 msec. interval; 2.5 cps speed •3 : 300 msec. interval; 1.6 cps speed •5 : 500 msec. interval; 1.0 cps speed DDSub band muteTurns the sub band function with sub band busy beep capa-bility ON and OFF.MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMDISPLAY SUB BAND MUTE BUSY BEEPSUb-OF OFF OFFSUb-OF SOFF ONSUb-On ON OFFSUb-On SON ONIC-2720H.qxd 02.9.9 8:12 Page 63 (1,1)

6411OTHER FUNCTIONSNew200111■AM/FM narrow mode [The IC-2720H has AM mode reception for both the left andright bands, and FM narrow mode is available for the leftband. Typically, AM mode is used for the air band(118–135.995 MHz).The FM narrow mode selection is available for the USA ver-sion’s left band only.qSelect the desired frequency band in VFO mode, or the de-sired memory channel on the left or right band as desired.•If you want to select FM narrow mode, select the desired fre-quency band or memory channel on the left band.wPush [SET•] to enter set mode.ePush [SET•] or [LOW•PRIO] to select “nAr” item or“COn” item.•Select “nAr” for Wide/Narrow setting.•Select “COn” for operating mode setting.rRotate the same band’s [DIAL] to select FM narrow or AMas desired.•“AM” appears when AM mode is selected.tPush [TONE•DTMF] to exit set mode.zPush [BAND] to select the desired band (left orright) as the main band.•If you want to select FM narrow mode, select the de-sired frequency band or memory channel on the leftband.xSet the desired frequency or memory channel.cPush [SETB(D-OFF)] to enter set mode.vPush [SETB(D-OFF)] or [ENTC(T-OFF)] to select“nAr” item or “COn” item.•Select “nAr” for Wide/Narrow setting.•Select “COn” for operating mode setting.bPush [Y]/[Z] to select FM narrow or AM as de-sired.nPush [CLRA(MW)] to exit set mode.SETBMAINT XMMAINT XM• Wide/Narrow setting • Operating mode settingIC-2720H.qxd 02.9.9 8:12 Page 64 (1,1)

6511 OTHER FUNCTIONSNew2001■Weather channel operation(USA version only)DDWeather channel selectionqPush the desired band’s [M/CALL•MW] several times toselect weather channel group. wRotate the same band’s [DIAL] to select the desiredweather channel. ePush the [M/CALL•MW] to select memory mode, or pushthe [V/MHz•SCAN] to select VFO mode.DDWeather alert functionNOAA broadcast stations transmit weather alert tones beforeimportant weather announcements. When the weather alertfunction is turned ON, the selected weather channel is moni-tored each 5 sec. for the announcement. When the alert sig-nal is detected, the “AL.t” and the WX channel are displayedalternately and sounds a beep tone until the transceiver is op-erated. The previously selected (used) weather channel ischecked periodically during standby or while scanning.qSelect the desired weather channel.wTurn the weather alert function ON in set mode.➥Push [SET•] to enter set mode.➥Push [SET•] or [LOW•PRIO] to select the weatheralert item, then rotate the [DIAL] to set ON.➥Push [TONE•DTMF] to exit set mode.eSets the desired stand-by condition.•Selects VFO, memory or call channel.•Scan or priority watch operation can also be selected.rWhen the alert is detected, a beep sounds and the follow-ing indication will be displayed.tTurn the weather alert function OFF in set mode.☞NOTE: While receiving a signal (on a frequency other thanthe weather alert ON frequency), the receiving signal oraudio will be interrupted momentarily every 5 sec. (approx.)in case the alert function is turned ON. This symptom iscaused by the WX alert function. To cancel these symp-toms, set the weather alert item OFF in set mode.BUSYMAINT XMBUSYMAINT XMShows above indications alternately.MAINT XMPush [M/CALL•MW] several times to select the WX channel group.IC-2720H.qxd 02.9.9 8:12 Page 65 (1,1)

6611OTHER FUNCTIONSNew200111■Microphone keysThe supplied HM-133’s (optional for some versions) [F-1] and[F-2] keys memorize the transceiver conditions. The [UP]/[DN] keys of the standard or an optional microphone(other than the HM-133) can be assigned functions like thefunction keys on the transceiver’s front panel.DD[UP]/[DN] keys on a microphones(other than HM-133)The following functions are assigned to the [UP]/[DN] keys onthe other microphones (HM-118N/TAN, etc.) when ﬁrst apply-ing power.•Default setting[UP] : channel up; push and hold to start scan, push againto stop scan.[DN] : channel down; push and hold to start scan, pushagain to stop scan.➥Assigning a functionqTurn the power OFF.wWhile pushing the desired switch on the transceiver andone of either [UP]/[DN] keys on the microphone, turn thepower ON.•The function is programmed into the key.➥Clearing an assignmentqTurn the power OFF.wWhile pushing the desired [UP] or [DN] key on the micro-phone, turn the power ON.DD[F-1]/[F-2] keys on HM-133The following conditions in the main band or both left andright bands can be memorized into [F-1] and [F-2] keys, in-dependently.•Operating frequency•Repeater setting (offset direction and frequency, tone ON/OFFand frequency)•Tone/DTCS squelch (ON/OFF, frequency/code and polarity)•Transmit output power selection•Tuning step•Operating mode selection (FM/AM)•Set mode settings*•Initial set mode settings**Only when storing both bands conditions➥Programming the both bands conditionAfter setting the desired contents of eachcondition in the both bands, push [FUNC]then push [F-1]/[F-2] for 1 sec.•3 beeps sound.➥Recalling the both bands conditionPush [FUNC] then [F-1]/[F-2] momentarily.➥Programming the main band conditionSet the desired contents of each condition inthe main band, then push [F-1]/[F-2] for 1 sec.•3 beeps sound.➥Recalling the main band conditionPush [F-1]/[F-2] momentarily.[F-1]/[F-2]ATPOWER ONIC-2720H.qxd 02.9.9 8:12 Page 66 (1,1)

6711 OTHER FUNCTIONSNew2001■Partial resetIf you want to initialize the operating conditions (VFO fre-quency, VFO settings, set mode contents) without clearingthe memory contents, a partial resetting function is availablefor the transceiver left and right bands independently.➥While pushing desired band’s [V/MHz•SCAN], turn thepower ON to partially reset the desired band (left or right).✔Hint!When pushing both [V/MHz•SCAN] and turning the powerON, partially reset both bands at the same time.■ALL resetThe function display may occasionally display erroneous in-formation (e.g. when first applying power). This may becaused externally by static electricity or by other factors.If this problem occurs, turn power OFF. After waiting a fewseconds, turn power ON again. If the problem persists, per-form the following procedure.•Partial resetting is also available. See left for details.IMPORTANT!:Resetting the transceiver CLEARS all memory informationand initializes all values in the transceiver.➥While pushing both band’s [M/CALL•MW], turn the powerON to reset the CPU.[M/CALL•MW]While pushing both [M/CALL•MW], turn power ON.[M/CALL•MW]ATPOWER ONLeft band partial reset.Right band partial reset.ATPOWER ONIC-2720H.qxd 02.9.9 8:12 Page 67 (1,1)

6811OTHER FUNCTIONSNew200111■Data cloningCloning allows you to quickly and easily transfer the pro-grammed contents from one transceiver to another; or , datafrom a personal computer to a transceiver using the optionalCS-2720 CLONING SOFTWARE.DCloning between transceiversqConnect the OPC-474 cloning cable to the [SP-2] jack ofthe master and sub-transceivers.•The master transceiver is used to send data to the sub-trans-ceiver.wWhile pushing left band’s [M/CALL•MW], turn power ON toenter cloning mode (master transceiver only— power ononly for sub-transceiver).•“CLOnE” appears and the transceivers enter the clone standbycondition.ePush the same [M/CALL•MW] on the master transceiver.•“CLOnE OUt” appears in the master transceiver’s display andthe S/RF indicators show that data is being transferred to thesub-transceiver.•“CLOnE In” appears automatically in the sub-transceiver’s dis-play and the S/RF indicators show that data is being receivedfrom the master transceiver.rWhen cloning is ﬁnished, turn power OFF, then ON to exitcloning mode.MAINT XMAINT XMMPushing left band’s [M/CALL•MW] start cloning.MAINT XMAINT XMMWhile pushing left band’s [M/CALL•MW], turn power ON.To [SP-2] To [SP-2]ATPOWER ONIC-2720H.qxd 02.9.9 8:12 Page 68 (1,1)

6911 OTHER FUNCTIONSNew2001DCloning using a personal computerData can be cloned to and from a personal computer (Mi-crosoft®Windows®98/2000/Me/XP) using the optional CS-2720 CLONING SOFTWAREand the optional cloning cableOPC-478U (USB type) or OPC-478 (RS-232C type). Consultthe CS-2720 CLONING SOFTWAREHELP ﬁle for details.DCloning error☞NOTE: DO NOT push any key on the sub-transceiver dur-ing cloning. This will cause a cloning error.When the display as below appears, a cloning error has oc-curred.In such a case, both transceivers automatically return to theclone standby condition and cloning must be repeated.■Packet operationDData speedFor packet operation, the transceiver can be set to one of twodata speeds: 1200 bps (default) or 9600 bps.qWhile pushing [SET•] turn power ON to enter initial setmode.wPush [SET•] or [LOW•PRIO] to select the ‘bPS’item.eRotate the left band [DIAL] to select the desired dataspeed.rPush [PWR] to exit initial set mode.For 1200 bps operation—•Disconnect the microphone plug from the microphoneconnector during data transmission, otherwise the datasignal and voice signal are simultaneously transmitted.For 9600 bps operation—•When the transceiver is set for 9600 bps data transmis-sion in set mode, the microphone signal is automaticallycut. Therefore, it is not necessary to disconnect the mi-crophone plug from the connector in this case.•When pushing [PTT] during data transmission, data trans-mission is interrupted and voice signals have priority.MAINT XMMAINT XMMAINT XMAINT XMMMicrosoft and Windows are registered trademarks of Microsoft Corporation inthe U.S.A. and other countries.IC-2720H.qxd 02.9.9 8:12 Page 69 (1,1)

7011OTHER FUNCTIONSNew200111D1200 bps packet operationqConnect the transceiver and a TNC as illustrated below.wSet the TNC for transmit.eSet transmit delay on the TNC to 30–50.rAdjust the TNC frequency deviation if necessary.•When using a deviation meter:Adjust the output of the TNC so that frequency deviationis in the range ± 3 to ±4 kHz.•When NOT using a deviation meter:A receiver or transceiver is needed to monitor the trans-mission—compare the received audio output level whenreceiving a TNC modulated signal with high level voicesignals using the microphone. Then adjust the TNC mod-ulated signal to a lower level than the voice modulatedsignal.•Read the instructions supplied with your TNC carefullybefore attempting packet operation with the transceiver.•Pin tAF OUT is for 1200 bps operation only. This pincannot be used for 9600 bps operation.•Over modulation may degrade signal quality. If you ﬁndthat many transmissions are failing, re-adjust the modu-lation level.SQLPTTRX AUDIOGNDTX AUDIOTNC sideq DATA INw GNDe PTT Pt AF OUTy P SQLIC-2720H.qxd 02.9.9 8:12 Page 70 (1,1)

7111 OTHER FUNCTIONSNew2001D9600 bps high speed packet operationThe transceiver supports 2 modes of 9600 bps packet opera-tion: G3RUH and GMSK.qConnect the transceiver and a TNC as illustrated below.wG3RUH mode can handle 16 kinds of modulated waveforms in order to maintain a communication link.eSet transmit delay on the TNC to 30–50.rAdjust the TNC frequency deviation if necessary (see pageat right).•When using the PTT P terminal for packet operation, novoice signals are transmitted from the microphone.•When pushing [PTT] during data transmission, datatransmission is interrupted and the voice signal takes pri-ority.•Read the instructions supplied with your TNC carefullybefore attempting packet operation with the transceiver.•Pin rDATA OUT is for 9600 bps operation only. This pincannot be used for 1200 bps operation.TNC sideSQLPTTRX AUDIOGNDTX AUDIOq DATA INw GNDe PTT P r DATA OUTy P SQLIC-2720H.qxd 02.9.9 8:12 Page 71 (1,1)

7211OTHER FUNCTIONSNew200111DAdjusting the transmit signal output fromthe TNCWhen setting data transmission speed to 9600 bps, the datasignal coming from the TNC is applied exclusively to the in-ternal limiter circuitry to automatically maintain band width.NEVER apply data levels from the TNC of over 0.6 V p-p, oth-erwise the transceiver will not be able to maintain the bandwidth and may possibly interfere with other stations.1. When using a level meter or synchroscope, adjust theTX audio output level (DATA IN level) from the TNC asfollows.0.4 V p-p (0.2 V rms) : recommended level0.2 V p-p–0.5 V p-p (0.1–0.25 V rms) : acceptable level2. When NOT using a measuring device.qConnect the transceiver to a TNC.wEnter a test mode (“CAL”, etc.) on the TNC, then trans-mit some test data.eWhen the transceiver fails to transmit the test data ortransmits sporadically (TX indicator doesn’t appear orﬂashes):- Decrease the TNC output level until the transmit indi-cator lights continuously.When transmission is not successful even though theTX indicator lights continuously:- Increase the TNC output level.DPacket operation band selectionBoth bands, or either the left or right band only, can be spec-iﬁed for packet operation to suit your preference. qWhile pushing [SET•] turn power ON to enter initial setmode.wPush [SET•] or [LOW•PRIO] to select the ‘PAC’item.eRotate the left band [DIAL] to select the desired band fromauto (At; default), left (L) and right (r).•Auto (At) : The main band is used for packet oper-ation.•Left (L)/Right (r) : The selected left or right band can onlybe used for packet operation.rPush [PWR] to exit initial set mode.MAINT XMMAINT XMIC-2720H.qxd 02.9.9 8:12 Page 72 (1,1)

73MAINTENANCENew200112PROBLEM POSSIBLE CAUSE SOLUTION REF.■Troubleshooting If your transceiver seems to be malfunctioning, please checkthe following points before sending it to a service center.Does not turn on.No sound comes from thespeaker.Sensitivity is low and onlystrong signals are audible.No contact possible withanother station.Repeater cannot be ac-cessed. Frequency cannot be set.Frequency cannot be setvia the microphone.•Power connector has a poor contact.•Polarity of the power connection is reversed.•Blown fuse.•Volume is too low.•The audio mute function is activated.•Squelch is set too high.•A selective call or squelch function is activatedsuch as pocket beep or tone squelch.•Antenna feedline or the antenna connector has apoor contact or is short circuited.•Squelch attenuator function is activated.•The other station is using tone squelch.•The transceiver is set to duplex.•Wrong offset frequency is programmed.•Wrong subaudible tone frequency is programmed.•The frequency lock function is activated.•Priority watch is paused on the watching frequency.•The frequency lock function is activated.•The microphone keypad lock function is activated.•Priority watch is paused on the watching fre-quency.•Check the connector pins.•Re-connect the power cable observing the properpolarity. Replace the fuse if damaged.•Check the cause, then replace the fuse.•Rotate [VOL] clockwise.•Push any switch or key to deactivate it.•Set the squelch level to the threshold.•Turn the appropriate function OFF.•Check, and if necessary, replace the feedline or sol-der the antenna connector again.•Set [SQL] between 10–12 o’clock position.•Turn the tone squelch function ON.•Set to simplex.•Correct the offset frequency.•Correct the subaudible tone frequency.•Turn the function OFF.•Push [LOW•PRIO] for 1 sec. to cancel the watch.•Turn the function OFF•Push [FUNC] then [SQLZ#(16KEY-L)] to deactivatethe microphone keypad lock function.•Push [LOW•PRIO] for 1 sec. to cancel the watch.—pgs. VI,74p. 74p. 16p. 21p. 16pgs. 52,53, 54p. VIIp. 17p. 54p. 23p. 27p. 25p. 15p. 47p. 15p. 15p. 47IC-2720H.qxd 02.9.9 8:12 Page 73 (1,1)

7412MAINTENANCENew200112PROBLEM POSSIBLE CAUSE SOLUTION REF.Some memory channelscannot be selected via thetuning dial.Scan does not operate.Transmission is automati-cally cut off.Transmission continueseven when the PTT is re-leased.The function display showserroneous information.•The memory channel number has not yet beenprogrammed.•The squelch is open.•Only 1 memory channel is programmed or otherchannels are set as skip channels.•Priority watch is activated.•Time-out timer is activated.•One-touch PTT function is activated.•The CPU is malfunctioning.•Select the channel via the microphone keypad tocheck whether the channel has been programmedor not.•Set the squelch to the threshold point.•Program other memory channels or cancel thememory skip function in the desired channels.•Cancel the watch.•Set the timer to OFF.•Turn the function OFF.•Reset the CPU.—p. 16pgs. 30,31, 44p. 47p. 61p. 21p. 67■Fuse replacementIf the fuse blows or the transceiver stops functioning, ﬁnd thesource of the problem if possible, and replace the damagedfuse with a new, rated one (FGB 20 A) as shown at right.20 A fuseIC-2720H.qxd 02.9.9 8:12 Page 74 (1,1)

75SPECIFICATIONS AND OPTIONSNew200113■SpeciﬁcationsDDGENERAL•Frequency coverage : (unit: MHz)*1Guaranteed: 144–148 MHz range only.; *2Guaranteed: 440–450 MHz range for the USA,430–440 MHz for the General version; *3Not guaranteed; *4824.010 to 848.990 and869.010 to 893.990 MHz ranges are inhibited for USA version and not guaranteed.•Type of emission : FM, AM (Receive only)•Number of memory channels : 212 (incl. 10 scan edges and 2 calls)•Frequency resolution : 5, 10, 12.5, 15, 20, 25, 30, 50 kHz•Operating temperature range : –10°C to +60°C; +14˚F to +140˚F•Frequency stability : ±10 ppm (–10°C to +60°C)•Power supply requirement : 13.8 V DC ±15%•Current drain (at 13.8 V DC: approx.): Transmit at 50 W 12 AReceive standby 1.2 A(simultaneous receive) max. audio 1.8 A•Antenna connector : SO-239 (50 Ω)•Dimensions (proj. not included) :Main Unit 140(W) ×40(H) ×187(D) mm51⁄2(W)×19⁄16(H)×73⁄8(D) inRemote controller 140(W) ×50(H) ×24.5(D) mm51⁄2(W)×131⁄32(H)×31⁄32(D) in•Weight (approx.) :Main unit (incl. separation cable) 1.25 kg; 2 lb 12 ozRemote controller 150 g; 5.3 ozDDTRANSMITTER•Modulation system : Variable reactance frequency modulation•Output power : VHF 50/15/5 W* (approx.)UHF 35/15/5 W* (approx.)*25/15/5 W only for the Taiwan version.•Max. frequency deviation : ±5.0 kHz (wide)±2.5 kHz (narrow: Left band only)•Spurious emissions : Less than –60 dB•Microphone connector : 8-pin modular (600 Ω)DDRECEIVER•Receive system : Double-conversion superheterodyne•Intermediate frequencies :Left band 1st: 38.85 MHz, 2nd: 450 kHzRight band 1st: 46.05 MHz, 2nd: 455 kHz•Sensitivity (FM: at 12 dB SINAD/AM: at 10 dB S/N):Frequency range Left band (µV) Right band (µV)118–159.995 MHz 0.18/0.45160–173.995 MHz 0.32/—0.2/—174–179.995 MHz 0.32/—N/A180–219.995 MHz 3.5/—N/A220–259.995 MHz 0.32/0.79 N/A260–349.995 MHz 3.2/5.6 N/A350–374.995 MHz 0.32/1.0 N/A375–399.995 MHz 0.22/0.63400–429.995 MHz 0.22/—430–450 MHz 0.18/—450.005–499.995 MHz 0.22/—500–549.995 MHz 0.32/—0.22/—810–879.990 MHz N/A 0.45/—880–999.990 MHz N/A 1.0/—Version Left Band Right BandUSA, Rx: 118–549.995*1Rx: 118–173.995*1, 375–549.995,*3General Tx: 144–148, 430–450*2810–999.99*4Tx: 144–148, 430–450*2Asia Rx: 136–173.995,*1430–440 Rx: 136–173.995,*1430–440Tx: 144–148, 430–440 Tx: 144–148, 430–440Australia Tx/Rx: 144–148, 430–440Taiwan, Tx/Rx: 144–146, 430–440KoreaIC-2720H.qxd 02.9.9 8:12 Page 75 (1,1)

7613SPECIFICATIONS AND OPTIONSNew200113•Squelch sensitivity†(threshold) : Less than 0.13 µV •Selectivity†(typical) :Wide More than 12 kHz/6 dBLess than 30 kHz/60 dBNarrow (USA only) More than 6 kHz/6 dBLess than 20 kHz/60 dB•Spurious and image rejection†: More than 60 dB•AF output power†(at 13.8 V DC): More than 2.4 W at 10% distortion with an8Ωload•Ext. speaker connectors : 3-conductor 3.5 (d) mm (1⁄8″)/8 Ω†Guaranteed 144–148 MHz and 430–440 or 440–450 MHz ranges only.■OptionsHM-133 REMOTE-CONTROL MICROPHONEWired remote control microphone with key backlight. Same as thatsupplied with the transceiver.HM-118TAN/TN DTMF MICROPHONEHM-118N HAND MICROPHONEHS-62FLEXIBLE MOBILE MICROPHONE+ HS-15SBSWITCH BOX+ OPC-589ADAPTER CABLEFor all-round mobile operation.OPC-1154/OPC-1155SEPARATION CABLESA ferrite core is supplied with the OPC-1155 for the USA version.Same as that supplied with the transceiver. 3.5 m (11.5 ft)OPC-1156CONTROLLER EXTENSION CABLEExtends the supplied separation cable 3.5 m (11.5 ft)MB-84REMOTE CONTROLLER BRACKETSame as that supplied with the transceiver.MB-85COMBINATION BRACKETUsed for single-body installation. 20 cm (77⁄8in) remote control cableis supplied.MB-65MOUNTING BASEMounts the remote controller on to variety of place in vehicle. MB-84is required for mounting.MB-17AMOBILE MOUNTING BRACKETOne-touch bracket. Transceiver main unit easily attached or re-moved.OPC-440/OPC-647MIC EXTENSION CABLESOPC-440: 5.0 m (16.4 ft); OPC-647: 2.5 m (8.2 ft)OPC-441SPEAKER EXTENSION CABLE5.0 m (16.4 ft)SP-7/SP-10 EXTERNAL SPEAKERSSP-7: For base station use. Cable length: 1.0 m; 3.3 ftSP-10: For all-round mobile operation. Cable length: 1.5 m; 4.9 ftOPC-347/1132DC POWER CABLESOPC-347: 7.0 m (23 ft)OPC-1132: 3.0 m (9.8 ft) Same as that supplied with the transceiver.CS-2720CLONING SOFTWARE+OPC-478UCLONING CABLEProvides quick and easy programming items, such as memory chan-nels, set mode contents for local repeater frequencies, via PC’s USBterminal. RS-232C type cloning cable, OPC-478, also available.OPC-474CLONING CABLEUsed for data cloning between transceivers.All stated speciﬁcations are subject to change without notice or obligation.IC-2720H.qxd 02.9.9 8:12 Page 76 (1,1)

77MODE ARRANGEMENTNew200114MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XDUPMMAINT XMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XTMMAINT XMMAINT XMMAINT XMMMAINBANDSCANV/MHzSCANV/MHzSCANV/MHzMWM/CALLMWM/CALLTONEDTMFSETSET:LOWPRIO:SET:LOWPRIO:PWRKey-touch beep (p. 61) Time-out timer (p. 61) Auto repeater (p. 61)(USA version only)AActive band (p. 63)DTMF speed (p. 63)Sub band mute (p. 63)SET MODEDTMF MEMORYCLONE MODECALL CHANNEL (p. 38)WEATHER CHANNEL (p. 65)(USA version only)BANK CHANNEL (p. 35)MEMORY MODE (p. 29)VFO mode (p. 12) INITIAL SET MODEDisplay dimmer (p. 57) Display color (p. 57) Repeater tone frequency (p. 57)T(NMode selection (p. 59)*4Weather alert*2 (p. 59)1st Lo frequency (p. 59)When the DTMFmemory encoder isactivated.See p. 48 for details.See p. 68 for details.for 1 sec.IC-2720H.qxd 02.9.9 8:12 Page 77 (1,1)

7814MODE ARRANGEMENTNew200114MAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XDUPMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XMMAINT XTMMAINT XT SQLMMAINT XDTCSMMAINT XDTCSMMAINT XDUPMSET:LOWPRIO:SET:LOWPRIO:Time-out timer (p. 61) Auto repeater (p. 61)(USA version only)Auto power off (p. 61) Cooling fan (p. 62) Data speed (p. 62) Packet operation band (p. 62)Squelch delay (p. 62)Microphone sensitivity (p. 62)Squelch attenuator (p. 62)Active band (p. 63)DTMF speed (p. 63)MODEDisplay color (p. 57) Repeater tone frequency (p. 57)Tone squelch frequency (p. 57)DTCS code (p. 57) DTCS polarity (p. 58) Offset frequency (p. 58)Tuning step (p. 58)Scan resume timer (p. 58)Channel skip setting*1 (p. 58)Narrow setting*2*3 (p. 59)Mode selection (p. 59)*4Weather alert*2 (p. 59)*1Appears when accessing from memory mode only.*2Available for USA versions only.*3Appears when accessing set mode from left band only.*4Does not appear when accessing set mode from 900 MHz band.IC-2720H.qxd 02.9.9 8:12 Page 78 (1,1)

1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 JapanA-6124D-1EXPrinted in Japan©2002 Icom Inc.New2001IC-2720H.qxd 02.9.9 8:12 Page 79 (1,1)