User manual ICOM IC-2720H - INSTRUCTION MANUAL

INSTRUCTION MANUAL i2720H DUAL BAND FM TRANSCEIVER This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FOREWORD Thank you for purchasing this Icom product. The IC-2720H VHF/UHF FM TRANSCEIVER is designed and built with Icom's superior technology and craftsmanship. With proper care, this product should provide you with years of trouble-free operation. We want to take a couple of moments of your time to thank you for making your IC-2720H your radio of choice, and hope you agree with Icom's philosophy of "technology first." Many hours of research and development went into the design of your IC-2720H. IMPORTANT READ ALL INSTRUCTIONS carefully and completely before using the transceiver. SAVE THIS INSTRUCTION MANUAL-- This instruction manual contains important operating instructions for the IC-2720H. EXPLICIT DEFINITIONS DEFINITION Personal injury, fire hazard or electric shock R WARNING! may occur. CAUTION NOTE Equipment damage may occur. Recommended for optimum use. No risk of personal injury, fire or electric shock. WORD D FEATURES V/V, U/U simultaneous receive capability Independent controls for each left and right bands Separate controller for flexible installation 50 W* of high transmit output power *VHF band; 35 W for UHF, 25 W for Taiwan version Remote control microphone standard New DMS (Dynamic Memory Scan) system i Icom, Icom Inc. and the logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries. PRECAUTION RWARNING RF EXPOSURE! This device emits Radio Frequency (RF) energy. Extreme caution should be observed when operating this device. If you have any questions regarding RF exposure and safety standards please refer to the Federal Communications Commission Office of Engineering and Technology's report on Evaluating Compliance with FCC Guidelines for Human Radio frequency Electromagnetic Fields (OET Bulletin 65). NEVER let objects impede the operation of the cooling fan on the rear panel. DO NOT push the PTT when not actually desiring to transmit. DO NOT allow children to play with any radio equipment containing a transmitter. During mobile operation, DO NOT operate the transceiver without running the vehicle's engine. When the transceiver's power is ON and your vehicle's engine is OFF, the vehicle's battery will soon become exhausted. RWARNING! NEVER connect the transceiver to an AC outlet. This may pose a fire hazard or result in an electric shock. RWARNING! NEVER operate the transceiver while driving a vehicle. Safe driving requires your full attention--anything less may result in an accident. NEVER connect the transceiver to a power source of more than 16 V DC. This will damage the transceiver. AVOID using or placing the transceiver in direct sunlight or in areas with temperatures below ­10°C or above +60°C. BE CAREFUL! The transceiver will become hot when operating it continuously for long periods. NEVER connect the transceiver to a power source using reverse polarity. This will damage the transceiver. AVOID setting the transceiver in a place without adequate ventilation. Heat dissipation may be affected, and the transceiver may be damaged. NEVER cut the DC power cable between the DC plug and fuse holder. If an incorrect connection is made after cutting, the transceiver may be damaged. AVOID the use of chemical agents such as benzine or alcohol when cleaning, as they can damage the transceiver's surfaces. NEVER expose the transceiver to rain, snow or any liquids. The transceiver may be damaged. USE Icom microphones only (supplied or optional). Other manufacturer's microphones have different pin assignments and may damage the transceiver if attached. NEVER operate or touch the transceiver with wet hands. This may result in an electric shock or damage the transceiver. NEVER place the transceiver where normal operation of the vehicle may be hindered or where it could cause bodily injury. For U.S.A. only CAUTION: Changes or modifications to this device, not expressly approved by Icom Inc., could void your authority to operate this device under FCC regulations. ii SUPPLIED ACCESSORIES q w e r t y TABLE OF CONTENTS FOREWORD ........................................................................................... i IMPORTANT ............................................................................................ i EXPLICIT DEFINITIONS ......................................................................... i PRECAUTION ........................................................................................ ii SUPPLIED ACCESSORIES .................................................................. iii TABLE OF CONTENTS ......................................................................... iii QUICK REFERENCE GUIDE ........................................................... I­XII I Installation ....................................................................................... I I Your first contact ......................................................................... VIII I Repeater operation ........................................................................ X I Programming memory channels.................................................... XI 1 PANEL DESCRIPTION ............................................................... 1­10 I Front panel-- controller ................................................................. 1 I Function display ............................................................................. 3 I Main unit ........................................................................................ 5 I Microphone (HM-133) .................................................................... 7 I Microphone keypad ........................................................................ 8 I Optional microphones (HM-118N/TN/TAN)................................... 10 2 SETTING A FREQUENCY ........................................................ 11­15 I Preparation ................................................................................... 11 I Using the tuning dial .................................................................... 13 I Using the [Y]/[Z] keys ................................................................. 13 I Using the keypad ......................................................................... 13 I Tuning step selection ................................................................... 14 I Lock functions .............................................................................. 15 3 BASIC OPERATION ................................................................. 16­21 I Receiving ..................................................................................... 16 I Monitor function ........................................................................... 16 I Squelch attenuator ....................................................................... 17 I V/V, U/U simultaneous receive (Para-watch) ............................... 18 I Sub band mute/sub band busy beep ........................................... 19 I Transmitting ................................................................................. 20 u i o q DC power cable (3 m) .............................................1 w Mobile mounting bracket .......................................1 e Microphone (HM-133)* ..........................................1 r Fuse (20 A) .........................................................1 t Mounting screws, nuts and washers .....................1 set y Microphone hanger ................................................1 u Remote controller bracket (MB-84) ...........................1 i Mounting screws, nuts and washers for MB-84 ......1 set o Separation cable (3.5 m; 11.5 ft) ..............................1 *HM-118N HAND MICROPHONE or HM-118TN/TAN supplied versions are also available. A ferrite core is adapted for the USA version. DTMF MICROPHONE iii 4 5 6 7 8 I Selecting output power ................................................................ 20 I One-touch PTT function ............................................................... 21 I Audio mute function ..................................................................... 21 REPEATER OPERATION ......................................................... 22­28 I General ........................................................................................ 22 I Accessing a repeater ................................................................... 23 I Subaudible tones ......................................................................... 25 I Offset frequency .......................................................................... 27 I Auto repeater (USA version only) ................................................ 28 MEMORY OPERATION ............................................................ 29­37 I General description ...................................................................... 29 I Memory channel selection ........................................................... 29 I Programming a memory channel ................................................. 30 I Transferring memory contents ..................................................... 32 I Memory clearing .......................................................................... 34 I Memory bank selection ................................................................ 35 I Memory bank setting .................................................................... 36 I Transferring bank contents .......................................................... 37 CALL CHANNEL OPERATION ................................................ 38­39 I Call channel selection .................................................................. 38 I Call channel transferring .............................................................. 38 I Programming a call channel ........................................................ 39 SCAN OPERATION .................................................................. 40­45 I Scan types ................................................................................... 40 I Scan start/stop ............................................................................. 41 I Scan edges programming ............................................................ 42 I Skip channel setting ..................................................................... 44 I Scan resume condition ................................................................ 45 PRIORITY WATCH .................................................................... 46­47 I Priority watch types ...................................................................... 46 I Priority watch operation ............................................................... 47 9 DTMF MEMORY ENCODER ..................................................... 48­51 I Programming a DTMF code ......................................................... 48 I Transmitting a DTMF code .......................................................... 50 I DTMF speed ................................................................................ 51 10 POCKET BEEP AND TONE SQUELCH ................................... 52­55 I Pocket beep operation ................................................................. 52 I Tone/DTCS squelch operation ..................................................... 54 I Tone scan ..................................................................................... 55 11 OTHER FUNCTIONS ................................................................ 56­72 I Set mode ...................................................................................... 56 I Initial set mode ............................................................................. 60 I AM/FM narrow mode ................................................................... 64 I Weather channel operation (USA version only) ........................... 65 I Microphone keys .......................................................................... 66 I Partial reset .................................................................................. 67 I All reset ........................................................................................ 67 I Data cloning ................................................................................. 68 I Packet operation .......................................................................... 69 12 MAINTENANCE ........................................................................ 73­74 I Troubleshooting ........................................................................... 73 I Fuse replacement ........................................................................ 74 13 SPECIFICATIONS AND OPTIONS ........................................... 75­76 I Specifications ............................................................................... 75 I Options ......................................................................................... 76 14 MODE ARRANGEMENT ........................................................... 77­78 1 2 3 4 5 6 7 8 9 10 11 12 13 14 iv QUICK REFERENCE GUIDE I Installation D Installation methods · Single body installation Transceiver · Remote installation Front panel Main body · Optional MB-85 COMBINATION BRACKET is necessary to mount the controller to the main unit. (20 cm; 77/8 separation cable is supplied with the bracket.) · The supplied mounting bracket (or optional MB-17A) can be used for the main unit installation. · The supplied MB-84 REMOTE CONTROLLER BRACKET and OPC-1155 SEPARATION CABLE can be used for installation. · Optional OPC-1156 SEPARATION CABLE (3.5 m; 11.5 ft) is available for extend the separation cable. · Optional MB-65 MOUNTING BASE is available for increasing front panel mounting possibilities. · Optional OPC-440 MICROPHONE CABLE (5.0 m; 16.4 ft) and OPC-647 (2.5 m; 8.2 ft) are available to extend the microphone cable. · Optional OPC-441 SPEAKER CABLE (5.0 m; 16.4 ft) is available to extend the speaker cable. I QUICK REFERENCE GUIDE D Location Select a location which can support the weight of the transceiver and does not interfere with driving. We recommend the locations shown in the diagram below. NEVER place the transceiver or remote controller where normal operation of the vehicle may be hindered or where it could cause bodily injury. NEVER place the transceiver or remote controller where air bag deployment may be obstructed. DO NOT place the transceiver or remote controller where hot or cold air blows directly onto it. AVOID placing the transceiver or remote controller in direct sunlight. qDrill 4 holes where the mounting bracket is to be installed. · Approx. 5.5­6 mm (1/4) when using nuts; approx. 2­3 mm (1/8) when using self-tapping screws. wInsert the supplied screws, nuts and washers through the mounting bracket and tighten. eAdjust the angle for your suitable position. Nut Spring washer Mounting bracket When using self-tapping screws Flat washer QQQ @@@ ;;; Q @ ; Main unit Controller Main unit Main unit Mounting nut 25° II Quick reference guide D Using the mounting bracket QUICK REFERENCE GUIDE D MB-84 installation The supplied MB-84 REMOTE for separate installation. CONTROLLER BRACKET is used wAttach the remote controller to the MB-84 and tighten the controller using with the supplied screws. e Tighten the controller with bracket. · Using the optional MB-65 q Drill 2 holes where the bracket is to be installed. · Approx. 4 mm (1/8) when using nuts; approx. 1­2 mm (1/16) when using self-tapping screws. · Over-head mounting Nut Spring washer Remote controller Supplied screws Flat washer MB-84 · Standard mounting Self-tapping screws Remote controller Adjust the viewing angle for maximum visibility of the function display. Optional MB-65 MB-84 (supplied) Supplied screws MB-84 III QUICK REFERENCE GUIDE D Optional MB-85 installation When using the optional MB-85 (COMBINATION BRACKET), you can install the control head of the IC-2720H in one of 2 methods. A 20 cm (77/8) remote control cable is supplied for connection, and connect the cable before attaching the bracket to the main unit is recommended. · Example 1 · Example 2 IV Quick reference guide QUICK REFERENCE GUIDE D Separation cable connection A separation cable (3.5 m; 11.5 ft) is supplied with the IC2720H. Connect the controller and the main unit using with the separation cable as follows. Controller Main unit D Microphone connection Two microphone connectors are available for the IC-2720H-- one is on the controller side panel, and another is on the main unit front panel. Connect the supplied microphone to either the desired connector as illustrated below. See "IMPORTANT!" below. Controller IMPORTANT!-- For the USA version A ferrite core is supplied within the separation cable. Connect the cable connector with the ferrite core into the main unit [CONTROLLER] socket as below. Main unit Ferrite core V QUICK REFERENCE GUIDE D Battery connection  RWARNING NEVER remove the fuse holders from the DC power cable.  NEVER connect the transceiver directly to a 24 V battery.  DO NOT use the cigarette lighter socket for power connections. (See p. 6 for details) Attach a rubber grommet when passing the DC power cable through a metal plate to prevent a short circuit. · CONNECTING TO A DC POWER SOURCE Grommet IC-2720H Use a 13.8 V DC power supply with at least 15 A capacity. Make sure the ground terminal of the DC power supply is grounded. · CONNECTING TO A DC POWER SUPPLY IC-2720H DC power supply 13.8 V red - black Fuses 20 A _ black + red WARNING! NEVER remove the fuse holders. to an AC outlet - 12 V battery Supplied DC power cable NOTE: Use terminals for the cable connections. Crimp 12 V Solder - black red Fuses 20 A See p. 74 for fuse replacement. VI Quick reference guide D DC power supply connection QUICK REFERENCE GUIDE D Antenna installation · Antenna location To obtain maximum performance from the transceiver, select a high-quality antenna and mount it in a good location. A nonradial antenna should be used when using a magnetic mount. Roof-mount antenna (Drill a hole or use a magnetic mount.) Gutter-mount antenna 1­2 mm solder solder · Antenna connector The antenna uses a PL-259 connector. · PL-259 CONNECTOR 30 mm Trunk-mount antenna q Slide the coupling ring down. Strip the cable jacket and soft solder. w Strip the cable as shown at left. Soft solder the center conductor. e Slide the connector body on and solder it. r Screw the coupling ring onto the connector body. (10 mm 3/8 in) Coupling ring 10 mm (soft solder) 10 mm Soft solder NOTE: There are many publications covering proper antennas and their installation. Check with your local dealer for more information and recommendations. To antenna VII QUICK REFERENCE GUIDE Now that you have your IC-2720H installed in your car or shack, you are probably excited to get on the air. We would like to take you through a few basic operation steps to make your first "On The Air" an enjoyable experience. The IC-2720H displays 2 frequencies on left and right bands simultaneously. However, transmission, some switches and microphone keys operation are accepted for the main band only. Push the desired band's [MAIN·BAND] 1. Turning ON the transceiver Before powering up your IC-2720H, you may want to make sure the audio volume and squelch level controls are set in 9­10 o'clock positions. Push the desired band's (left or right) [MAIN·BAND] to select the main band. · "Q" appears for the main band. Using the HM-133 Set both [VOL] and [SQL] controls to 9­10 o'clock positions. You can select the main band from the HM-133. Push Although you have purchased a brand new transceiver, some settings may be changed from the factory defaults because of the QC process. Resetting the CPU is necessary to start from factory default. MAIN TX MAIN TX M M Push [M/CALL·MW] [M/CALL·MW] MAIN TX again MAIN TX While pushing both [M/CALL·MW], turn power ON. M M While pushing both band's [M/CALL·MW], push [PWR] for 1 sec. to reset the CPU. VIII Quick reference guide I Your first contact 2. Selecting the main band QUICK REFERENCE GUIDE 3. Selecting the operating frequency band The IC-2720H has 2 m and 70 cm bands for each left and right band. The operating band can be exchanged between them, and the same bands, V/V and U/U settings are also possible. Push the desired band's [MAIN·BAND] for 1 sec. [DIAL] Rotate the desired [DIAL]. MAIN TX MAIN TX 4. Tune the frequency The tuning dial will allow you to dial in the frequency you want to operate. Pages 13 and 14 will instruct you on how to set the tuning speed. Using the HM-133 M M You can directly enter the frequency with the HM-133 keypad for the main band. [EXAMPLE]: Setting frequency to 145.3625 MHz. Push MAIN TX Frequency band initial is displayed. Push the desired band's (left or right) [MAIN·BAND] for 1 sec. then rotate the appropriate band's [DIAL]. · Push the [MAIN·BAND] momentarily to return to frequency indication. Push MAIN TX Push MAIN TX Push MAIN TX IX QUICK REFERENCE GUIDE 1. Setting duplex Push desired band's [MAIN·BAND] to select the main band. Push [DUP·MONI] once or twice to select minus duplex or plus duplex. · The USA version has an auto repeater function, therefore, setting duplex is not required. Using the HM-133 Plus or minus duplex selection and the repeater tone setting can 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. Push MAIN TX DUP MAIN TX DUP Push Push [DUP·MONI]. MAIN TX DUP 2. Repeater tone Push [TONE·DTMF] several times until "T" appears, if the repeater requires a subaudible tone to be accessed. MAIN TX DUP T MAIN TX T Push , then Push [TONE·DTMF]. X Quick reference guide I Repeater operation QUICK REFERENCE GUIDE I Programming memory channels The IC-2720H has a total of 212 memory channels (including 10 scan edges and 2 call channels) for storing often used operating frequency, repeater settings, etc. Any memory channel can be recalled from either left or right band. 3. Writing a memory channel Push 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 continuing to push the [M/CALL·MW] after programming. 1. Setting a frequency In VFO mode, set the desired operating frequency with repeater, 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, tuning step), if desired. 2. Selecting a memory channel Push the same band's [M/CALL·MW] for 1 sec., then rotate the [DIAL] to select the desired memory channel. · "!" indicator and memory channel number blink. MAIN TX M Push [M/CALL·MW] for 1 sec. XI QUICK REFERENCE GUIDE Using the HM-133 q In VFO mode, set the desired operating frequency, including offset direction, tone settings, etc. Push [VFO/LOCK] to select VFO. Push [ENT C(T-OFF)] first, then enter the desired operating frequency via the keypad. · Set other data, such as repeater tone, duplex information, tuning step, if necessary. w Push [FUNC] then [CLR A(MW)]. · "!" indicator and memory channel number blink. Push then , MAIN TX M e Push [Y]/[Z] to select the desired memory channel. r Push [FUNC] then push [CLR A(MW)] for 1 sec. to program. · 3 beeps sound · Memory channel number automatically increases when continuing to push [CLR A(MW)] after programming. XII Quick reference guide 1 PANEL DESCRIPTION I Front panel-- controller q Function display (pgs. 3, 4) w MAIN BAND V/MHz SCAN M/CALL MW PWR SET MAIN TX DUP T SQL DTCS AM MAIN TX DUP T SQL DTCS AM MAIN BAND V/MHz SCAN M/CALL MW BUSY LOWMID M SKIP BUSY LOWMID M SKIP VOL VOL DUAL BAND FM TRANSCEIVER i2720 DIAL SQL DUP MONI TONE DTMF LOW PRIO DIAL SQL *The switches w to t are for the MAIN band only. t r e q POWER SWITCH [PWR] Turns power ON and OFF when pushed for 1 sec. w SET·LOCK SWITCH [SET· ] Enters set mode when pushed. (p. 56) Switches the lock function ON and OFF when pushed for 1 sec. (p. 15) e OUTPUT POWER·PRIORITY SWITCH [LOW·PRIO] Each push changes the output power selection. (p. 20) Starts priority watch when pushed for 1 sec. (p. 47) r TONE·DTMF SWITCH [TONE·DTMF] Each push selects a tone function. (pgs. 23, 52) · Subaudible tone encoder, pocket beep (CTCSS), tone squelch, pocket beep (DTCS), DTCS squelch or tone function OFF can be selected. Turns DTMF memory encoder ON and OFF when pushed for 1 sec. (p. 48) t DUPLEX·MONITOR SWITCH [DUP·MONI] Push to select DUP­, DUP+ and simplex operation. (p. 23) Push for 1 sec. to switch the monitor function ON and OFF. (p. 16) 1 PANEL DESCRIPTION 1 1 Left band y u i o !0 MAIN BAND V/MHz SCAN M/CALL MW Right band PWR SET MAIN BAND V/MHz SCAN M/CALL MW y u i o !0 VOL DUAL BAND FM TRANSCEIVER i2720 VOL DIAL SQL DUP MONI TONE DTMF LOW PRIO DIAL SQL *The same controls for both the left and right bands are arranged in symmetry. !1 !1 y MAIN·BAND SWITCH [MAIN·BAND] Push to select the main band. (p. 11) Enters operating band select condition when pushed for 1 sec. (p. 11) u VFO/MHz TUNING·SCAN SWITCH [V/MHz·SCAN] Selects and toggles VFO mode and 1 MHz (or 10 MHz for some versions) tuning when pushed. (p. 12) Starts scan when pushed for 1 sec. (p. 41) · Cancels a scan when pushed during scan. o VOLUME CONTROL [VOL] (p. 16) Adjusts the audio level for relative band. !0 TUNING DIAL [DIAL] Selects the operating frequency (p. 13), memory channel (p. 29), the setting of the set mode item and the scanning direction (p. 41) for the relative band. !1 SQUELCH CONTROL [SQL] Varies the squelch level for relative band. (p. 16) · The RF attenuator activates and increases the attenuation when rotated clockwise to the center position and further. (p. 17) iMEMORY/CALL·MEMORY WRITE SWITCH [M/CALL·MW] Push to select and toggle memory, call and weather channel* modes. (pgs. 12, 29, 38, 65) Selects a memory channel for programming when pushed for 1 sec. (pgs. 30, 39, 42) *Weather channels available for USA versions only. 2 1 PANEL DESCRIPTION I Function display Left band q w e DUP T SQL r DTCS AM t q w e DUP T SQL r DTCS AM t Right band MAIN TX y MAIN TX y BUSY LOWMID M SKIP BUSY LOWMID M SKIP !2 !1 !0 oi u !2 !1 !0 oi u *The same indications for both the left and right bands are arranged. q MAIN INDICATOR (p. 11) Indicate the main band for transmit and function control. w TRANSMIT INDICATOR Appears while transmitting. (p. 20) Blinks while transmitting with the one-touch PTT function. (p. 21) e DUPLEX INDICATORS (p. 23) "DUP" appears when plus duplex, "DUP ­" appears when minus duplex (repeater) operation is selected. r TONE INDICATORS "T" appears while the subaudible tone encoder is in use. (p. 23) "T SQL" appears while the tone squelch function is in use. (p. 52) "DTCS" appears while the DTCS squelch function is in use. (p. 52) "S" appears with the "T SQL" or "DTCS" indicator while the pocket beep function (with CTCSS or DTCS) is in use. (p. 52) 3 PANEL DESCRIPTION t AM INDICATOR (p. 64) Appears when AM mode is selected. y FREQUENCY READOUT Shows 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 memory function is in use. (p. 48) 1 1 !2 BUSY INDICATOR Appears when a signal is being received or the squelch is open. (p. 16) Blinks while the monitor function is activated. (p. 16) u MEMORY 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) i SKIP INDICATOR (p. 44) Appears when the displayed memory channel is specified as a skip channel. o MEMORY INDICATOR (pgs. 12, 29) Appears when memory mode is selected. !0 S/RF INDICATORS Shows the relative signal strength while receiving signals. (p. 16) Shows the output power level while transmitting. (p. 20) !1 OUTPUT POWER INDICATORS "LOW" appears when low output power; "MID" appears when middle output power is selected. No indicator appears when high output power is selected. 4 1 PANEL DESCRIPTION w MICROPHONE CONNECTOR [MIC] Connects the supplied or an optional microphone. e q +8 V DC output (Max. 10 mA) w Channel up/down e 8 V control IN r PTT t GND (microphone ground) y MIC (microphone input) u GND i Data IN I Main unit q w i q e CONTROLLER CONNECTOR [CONTROLLER] (p. V) Connects the controller unit with the supplied cable. r COOLING FAN Rotates while transmitting. Also rotates while receiving depending on the setting in initial set mode. (p. 62) t ANTENNA CONNECTOR [ANT] Connects a 50 antenna with a PL-259 connector and a 50 coaxial cable. ANTENNA INFORMATION For radio communications, the antenna is of critical importance, to maximize your output power and receiver sensitivity. The transceiver accepts a 50 antenna and less than 1:1.5 of Voltage Standing Wave Ratio (VSWR). High SWR values not only may damage the transceiver but also lead to TVI or BCI problems. r t i y u q DATA SOCKET [DATA] Connects a TNC (Terminal Node Controller), etc. for data communications. · See p. 6 for connection information. 5 PANEL DESCRIPTION y EXTERNAL SPEAKER JACK 1 [SP-1] Connects an 8 speaker. Outputs both left and right bands 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. 1 1 D DATA JACK PIN ASSIGNMENT q e w r u EXTERNAL SPEAKER JACK 2 [SP-2] Connects an 8 speaker. Outputs right band's audio only. · Audio output power is more than 2.4 W. t y Front panel view i POWER RECEPTACLE [DC13.8V] Accepts 13.8 V DC ±15% with the supplied DC power cable.  NOTE: DO NOT use a cigarette lighter socket as a power source when operating in a vehicle. The plug may cause voltage drops and ignition noise may be superimposed onto transmit or receive audio. D Speaker information Connected speaker No external speakers [SP-1] only [SP-2] only 2 external speakers Left band audio Right band audio Internal speaker (mixed audio) External speaker (mixed audio) Internal speaker External speaker via [SP-1] External speaker External speaker via [SP-2] q DATA IN Input terminal for data transmit. See p. 62 for details on how to toggle data speed between 1200 (AFSK) and 9600 bps (G3RUH, GMSK). w GND Common ground for DATA IN, DATA OUT and AF OUT. e PTT P PTT terminal for packet operation only. Connect ground to transmit data. r DATA OUT Data out terminal for 9600 bps operation only. t AF OUT Data out terminal for 1200 bps operation only. y P SQL Becomes high (+5 V) when the transceiver receives a signal which opens the squelch. · To avoid unnecessary TNC transmission, connect squelch to the TNC to inhibit transmission when receiving signals. · Keep audio output at a normal level, otherwise a "P SQL" signal will not be output. 6 1 PANEL DESCRIPTION r ACTIVITY 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. t KEYPAD (pgs. 8, 9) y FUNCTION INDICATOR Lights orange while [FUNC] is activated--indicates the secondary function of switches can be accessed. Lights green when [DTMF-S] is activated--DTMF signals can be transmitted with the keypad. u 2nd FUNCTION SWITCH [FUNC] i DTMF SELECT SWITCH [DTMF-S] (p. 50) o FUNCTION SWITCHES [F-1]/[F-2] (p. 66) Program and recall your desired transceiver conditions. !0 BAND SWITCH [BAND] (p. 11) Push to switches main band between left and right bands. !1 MEMORY/CALL SWITCH [MR/CALL] Push to select memory mode. (p. 12) Push for 1 sec. to select call channel. (p. 38) I Microphone (HM-133*) q w e r t !1 !0 o i u y Mic element *A different microphone may be supplied depending on version. q VFO/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) w PTT SWITCH Push and hold to transmit; release to receive. Switches between transmitting and receiving while the one-touch PTT function is in use. (p. 21) e UP/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) 7 Important! All keys on the microphone function for the main band only. PANEL DESCRIPTION 1 1 I Microphone keypad KEY FUNCTION SECONDARY FUNCTION ( +key) OTHER FUNCTIONS Switches between opening and closing the In VFO mode enters operating band select(p. 12) squelch. (p. 16) ing condition. In memory mode enters bank selecting condition. (p. 35) Starts and stops scanning. Starts and stops priority watch. Selects high output power. Selects mid. output power. Selects low output power Selects minus duplex operation. Selects plus duplex operation. Selects simplex operation. Increases audio output level. (p. 41) Starts and stops tone scanning. (p. 55) (p. 47) Turns the one-touch PTT function ON and OFF. (p. 21) (p. 20) Turns the DTCS squelch ON. (p. 53) (p. 20) Turns the DTCS pocket beep function ON. (p. 53) (p. 20) Turns the DTMF memory encoder function ON. (p. 49) (p. 24) Turns the subaudible tone encoder ON. (p. 24) (p. 24) Turns the CTCSS pocket beep function ON. (p. 53) (p. 24) Turns the tone squelch function ON. (p. 53) (p. 16) Sends a 1750 Hz tone signal while pushing and holding. (p. 26) After pushing : Transmits the appropriate DTMF code. (pgs. 26, 50) When the DTMF memory encoder is activated, push [0] to [9] to transmit the appropriate DTMF memory contents . (p. 50) 8 1 PANEL DESCRIPTION KEY FUNCTION SECONDARY FUNCTION ( +key) OTHER FUNCTIONS Cancels frequency entry. (p. 13) Selects a memory channel for program Cancels the scan or priority watch. ming. (p. 31) (pgs. 41, 47) Advances the memory channel number Exit set mode. (p. 56) when continuously pushed after programming is completed. (p. 31) Enters set mode (p. 56) DTMF memory encoder function OFF. Advances the set mode selection order (p. 50) after entering set mode. (p. 56) Sets the keypad for numeral input. Turns the subaudible tone encoder, pocket After pushing : (p. 13) beep or CTCSS/DTCS tone squelch OFF. Transmits the appropriate Reverses the set mode selection order (pgs. 24, 53) DTMF code. (pgs. 26, 50) after entering set mode. (p. 56) Adjusts the squelch level increments. Mutes the audio. (p. 21) (p. 16) · Mute function is released when any operation is performed. Decreases audio output level. (p. 16) Sends a 1750 Hz tone signal for 0.5 sec. (p. 26) Adjusts the squelch level decrement. Locks the digit keys on the keypad (includ(p. 16) ing the A to D, # and M keys. (p. 15) 9 PANEL DESCRIPTION 1 1 I Optional Microphones (HM-118N/TN/TAN) · HM-118N w q PTT SWITCH Push and hold to transmit; release to receive. ON q e OFF w UP/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) e UP/DN LOCK SWITCH Slide to toggle [UP]/[DN] switches function ON and OFF. r KEYPAD (HM-118TN/TAN only) While pushing [PTT], push the desired key to send the DTMF code. · HM-118TN/TAN (DTMF) w ON q r e OFF 10 2 SETTING A FREQUENCY D Operating frequency band selection In the default condition, or after resetting the CPU, 2 m band is assigned in the left band, 70 cm band is assigned in the right band. However, the 2 m band can also be assigned into the right, and 70 cm band can also be assigned into the left band. Push the desired band's [MAIN·BAND] for 1 sec. [DIAL] MAIN TX MAIN TX I Preparation D Turning power ON/OFF Push [PWR] for 1 sec. Push [PWR] for 1 sec. to turn power ON and OFF. D MAIN band The IC-2720H can receive 144 MHz and 430(440) MHz band signals simultaneously. To activate all functions access or to change frequency via the microphone, you must designate one band as the main band. The transceiver transmits a signal on the main band only. Push the desired band's [MAIN·BAND] M M Frequency band initial is displayed. q Push the desired band's [MAIN·BAND] for 1 sec. · Frequency band initial appears. Push the desired band's [MAIN·BAND] to select the main band. · "Q" indicates the main band. BAND wRotate the same band's [DIAL] to select the desired frequency band. · Pushing [Y]/[Z] on the microphone also selects the band. Push [BAND] to toggle the main band between left and right bands. ePush the [MAIN·BAND] to return to frequency indication in the selected frequency band. Note that in this manual, sections beginning with a microphone icon (as at left), designate operation via the HM-133 microphone. 11