IC-2720H_1.qxd 02.12.18 13:01 Page 1 (1,1) New2001 INSTRUCTION MANUAL DUAL BAND FM TRANSCEIVER i2720H 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.
IC-2720H_1.qxd 02.12.18 13:01 Page i (1,1) New2001 FOREWORD IMPORTANT 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.
IC-2720H_1.qxd 02.12.18 13:01 Page ii (1,1) New2001 PRECAUTION RWARNING RF EXPOSURE! This device emits Radio NEVER let objects impede the operation of the cooling fan on the Frequency (RF) energy. Extreme caution should be observed when operating this device.
IC-2720H_1.qxd 02.12.18 13:01 Page iii (1,1) New2001 SUPPLIED ACCESSORIES q w TABLE OF CONTENTS e r t u y 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.
IC-2720H_1.qxd 02.12.18 13:01 Page iv (1,1) New2001 4 5 6 7 8 ■ Selecting output power ................................................................ 20 ■ One-touch PTT function ............................................................... 21 ■ Audio mute function ..................................................................... 21 REPEATER OPERATION ......................................................... 22–28 ■ General ....................................................................
IC-2720H_1.qxd 02.12.18 13:01 Page I (1,1) New2001 QUICK REFERENCE GUIDE ■ Installation D Installation methods • Single body installation • Remote installation Front panel Transceiver 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.
02.12.18 13:01 ; Page II (1,1) New2001 QUICK REFERENCE GUIDE D Location D Using the mounting bracket 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.
IC-2720H_1.qxd 02.12.18 13:01 Page III (1,1) New2001 QUICK REFERENCE GUIDE D MB-84 installation The supplied MB-84 REMOTE for separate installation. CONTROLLER BRACKET is used q Drill 2 holes where the bracket is to be installed. • Approx. 4 mm (1⁄8″) when using nuts; approx. 1–2 mm (1⁄16″) when using self-tapping screws. wAttach the remote controller to the MB-84 and tighten the controller using with the supplied screws. e Tighten the controller with bracket.
IC-2720H_1.qxd 02.12.18 13:01 Page IV (1,1) New2001 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.
IC-2720H_1.qxd 02.12.18 13:01 Page V (1,1) New2001 QUICK REFERENCE GUIDE D Separation cable connection D Microphone connection A separation cable (3.5 m; 11.5 ft) is supplied with the IC2720H. 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 controller and the main unit using with the separation cable as follows.
IC-2720H_1.qxd 02.12.18 13:01 Page VI (1,1) New2001 D Battery connection D DC power supply 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. Use a 13.8 V DC power supply with at least 15 A capacity.
IC-2720H_1.qxd 02.12.18 13:01 Page VII (1,1) New2001 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.) Trunk-mount antenna • Antenna connector The antenna uses a PL-259 connector.
IC-2720H_1.qxd 02.12.18 13:01 Page VIII (1,1) New2001 ■ Your first contact 2. Selecting the main band 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.
IC-2720H_1.qxd 02.12.18 13:01 Page IX (1,1) New2001 QUICK REFERENCE GUIDE 3. Selecting the operating frequency band 4. Tune the frequency 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. 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. Push the desired band’s [MAIN•BAND] for 1 sec.
IC-2720H_1.qxd 02.12.18 13:01 Page X (1,1) New2001 ■ Repeater operation 1. Setting duplex Using the HM-133 Push desired band’s [MAIN•BAND] to select the main band. Push [DUP•MONI] once or twice to select minus duplex or plus duplex. 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.
IC-2720H_1.qxd 02.12.18 13:01 Page XI (1,1) New2001 QUICK REFERENCE GUIDE ■ 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. 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.
IC-2720H_1.qxd 02.12.18 13:01 Page XII (1,1) New2001 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. Quick reference guide QUICK REFERENCE GUIDE w Push [FUNC] then [CLR A(MW)]. • “!” indicator and memory channel number blink.
IC-2720H_1.qxd 02.12.18 13:01 Page 1 (1,1) New2001 1 PANEL DESCRIPTION ■ Front panel— controller q MAIN BAND w Function display (pgs. 3, 4) SET PWR MAIN T X V/MHz SCAN M/CALL MW DUP BUSY LOWMID T SQL DTCS AM M DUP MAIN T X T SQL BUSY LOWMID VOL i2720 DIAL DIAL SQL *The switches w to t are for the MAIN band only. SQL DUP MONI TONE DTMF LOW PRIO 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.
IC-2720H_1.qxd 02.12.18 13:01 Page 2 (1,1) New2001 PANEL DESCRIPTION Left band Right band MAIN BAND y u V/MHz SCAN V/MHz SCAN u i M/CALL MW M/CALL MW i y MAIN BAND o 1 SET PWR VOL VOL DUAL BAND FM TRANSCEIVER i2720 DIAL DIAL SQL o SQL !0 *The same controls for both the left and right bands are arranged in symmetry. 1 DUP MONI !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.
IC-2720H_1.qxd 02.12.18 13:01 Page 3 (1,1) New2001 1 PANEL DESCRIPTION ■ Function display q Left band MAIN T X w e DUP r T SQL t DTCS AM q MAIN T X w e DUP r T SQL t Right band DTCS AM y y BUSY LOWMID BUSY LOWMID M SKIP !2 !1 !0 o i M SKIP u !2 !1 !0 o i 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.
IC-2720H_1.qxd 02.12.18 13:01 Page 4 (1,1) New2001 PANEL DESCRIPTION t AM INDICATOR (p. 64) Appears when AM mode is selected. y FREQUENCY READOUT Shows the operating frequency, set mode contents, etc. 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) 1 • 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.
IC-2720H_1.qxd 02.12.18 13:01 Page 5 (1,1) New2001 1 PANEL DESCRIPTION ■ Main unit q w w MICROPHONE CONNECTOR [MIC] Connects the supplied or an optional microphone. e i q 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 e CONTROLLER CONNECTOR [CONTROLLER] (p. V) Connects the controller unit with the supplied cable. r t y u i q DATA SOCKET [DATA] Connects a TNC (Terminal Node Controller), etc.
IC-2720H_1.qxd 02.12.18 13:01 Page 6 (1,1) New2001 PANEL DESCRIPTION y EXTERNAL SPEAKER JACK 1 [SP-1] Connects an 8 Ω 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. u EXTERNAL SPEAKER JACK 2 [SP-2] Connects an 8 Ω speaker. Outputs right band’s audio only. 1 D DATA JACK PIN ASSIGNMENT q w e r t y 1 Front panel view • Audio output power is more than 2.4 W.
IC-2720H_1.qxd 02.12.18 13:01 Page 7 (1,1) New2001 1 PANEL DESCRIPTION ■ Microphone (HM-133*) q w e r !1 !0 o i u y Mic element t 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.
IC-2720H_1.qxd 02.12.18 13:01 Page 8 (1,1) New2001 PANEL DESCRIPTION 1 ■ Microphone keypad KEY FUNCTION 1 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. (p. 41) Starts and stops tone scanning. (p. 55) Starts and stops priority watch. (p. 47) Turns the one-touch PTT function ON and OFF. (p.
IC-2720H_1.qxd 02.12.18 13:01 Page 9 (1,1) New2001 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.
IC-2720H_1.qxd 02.12.18 13:01 Page 10 (1,1) New2001 PANEL DESCRIPTION 1 ■ Optional Microphones (HM-118N/TN/TAN) • HM-118N 1 q PTT SWITCH ➥ Push and hold to transmit; release to receive. w ON e q 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.
IC-2720H_1.qxd 02.12.18 13:01 Page 11 (1,1) New2001 2 SETTING A FREQUENCY ■ 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.
IC-2720H_1.qxd 02.12.18 13:01 Page 12 (1,1) New2001 SETTING A FREQUENCY 2 D VFO and memory modes BANK z Push [BAND] to select main band. x Push [FUNC], the push [BANK 1(MONI)] to select frequency band selecting condition. • The frequency band initial is displayed. c Push [Y]/[Z] to select the desired frequency [Y]/[Z] band. v Push [CLR A(MW)] to exit the condition, and return to frequency indication.
IC-2720H_1.qxd 02.12.18 13:01 Page 13 (1,1) New2001 2 SETTING A FREQUENCY ■ Using the tuning dial ■ Using the keypad q Rotate the desired band’s [DIAL] to set the frequency. The frequency can be directly set via numeral keys on the microphone. • 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) Push [V/MHz•SCAN] z Push [BAND] to select the desired band (left or right) as the main band.
IC-2720H_1.qxd 02.12.18 13:01 Page 14 (1,1) New2001 SETTING A FREQUENCY 2 ■ Tuning step selection [ Tuning steps are the minimum frequency change increments when you rotate [DIAL] or push [Y]/[Z] on the microphone. Independent tuning step for the left and right, as well as each frequency bands can be set for individual tuning convenience. The following tuning steps are available. • 5 kHz • 20 kHz • 10 kHz • 25 kHz • 12.
IC-2720H_1.qxd 02.12.18 13:01 Page 15 (1,1) New2001 2 SETTING A FREQUENCY ■ Lock functions To prevent accidental frequency changes and unnecessary function access, use the lock function. The transceiver has 2 different lock functions. D Frequency lock ] MAIN T X MAIN T X M M 2 “L”s appear while the lock function is activated. ➥ Push [SET• OFF. ] for 1 sec.
IC-2720H_1.qxd 02.12.18 13:01 Page 16 (1,1) 3 BASIC OPERATION ■ Receiving ■ Monitor function q Set 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. w Set the squelch level. ➥ Rotate the main band’s [SQL] fully counterclockwise in advance, then rotate the [SQL] clockwise until the noise just disappears.
IC-2720H_1.qxd 02.12.18 13:02 Page 17 (1,1) New2001 3 BASIC OPERATION ■ Squelch attenuator The transceiver has an RF attenuator related to the squelch level setting. Approx. 10 dB attenuation is obtained at maximum setting. The squelch attenuator allows you to set a minimum signal level needed to open the squelch. The attenuator function can be deactivated in initial set mode. ➥ Rotate [SQL] clockwise past the 12 o’clock position to activate the squelch attenuator.
IC-2720H_1.qxd 02.12.18 13:02 Page 18 (1,1) New2001 BASIC OPERATION 3 ■ V/V, U/U simultaneous receive (Para-watch) The IC-2720H can simultaneously receive two signals on the same band, such as 144 MHz band, using the para-watch function. MAIN T X MAIN T X M M DUP MAIN T X BANK M M MAIN T X M z Push [FUNC], the push [BANK 1(MONI)] to select frequency band selecting condition. • The frequency band initial appears on the main band. x Push [Y]/[Z] to select the desired frequency band band.
IC-2720H_1.qxd 02.12.18 13:02 Page 19 (1,1) New2001 3 BASIC OPERATION ■ Sub band mute/sub band busy beep The sub band mute function automatically cuts out sub band audio signals when both main and sub band signals are received simultaneously. While operating on the main band, a beep sounds to inform you that a signal was received on the sub band. MAIN T X M qWhile pushing [SET• initial set mode. The display shows that the sub band mute is turned ON and sub band busy beep is turned ON.
IC-2720H_1.qxd 02.12.18 13:02 Page 20 (1,1) New2001 BASIC OPERATION ■ Transmitting CAUTION: Transmitting without an antenna will damage the transceiver. ☞ NOTE: To prevent interference, listen on the channel before transmitting by pushing [DUP•MONI] for 1 sec., or [MONI 1(BANK)] on the microphone. q Select the main band. (p. 11) w Set the operating frequency. (pgs. 11–13) • Select output power if desired. See section at right for details. e Push and hold [PTT] to transmit. • “$” appears.
IC-2720H_1.qxd 02.12.18 13:02 Page 21 (1,1) New2001 3 BASIC OPERATION ■ One-touch PTT function ■ Audio mute function The PTT switch can be operated as a one-touch PTT switch (each push toggles between transmit/receive). Using this function you can transmit without pushing and holding the PTT switch. This function temporarily mutes the audio without disturbing the volume setting. To prevent accidental, continuous transmissions with this function, the transceiver has a time-out timer. See p.
IC-2720H_1.qxd 02.12.18 13:02 Page 22 (1,1) REPEATER OPERATION 4 ■ General • Repeater operation flow chart Repeaters allow you to extend the operational range of your radio because a repeater has much higher output power than the typical transceiver. Setp 1: Set the desired band to operate the repeater. Normally, a repeater has indipendent frequencies for each receiver and transmitter.
IC-2720H_1.qxd 02.12.18 13:02 Page 23 (1,1) New2001 4 REPEATER OPERATION ■ Accessing a repeater q Set the receive frequency (repeater output frequency) on the main band. (pgs. 11–13) w Push [DUP•MONI] one or two times, to select minus duplex or plus duplex. • “DUP–” or “DUP” appears to indicate the transmit frequency for minus shift or plus shift, respectively. • When the auto repeater function is turned ON (available for the USA version only), steps w and e are not necessary. (p.
IC-2720H_1.qxd 02.12.18 13:02 Page 24 (1,1) New2001 REPEATER OPERATION DUP– 7 DUP+ 8 z Set the receive frequency (repeater output frequency) on the main band. (pgs. 11–13) x Push [DUP– 7(TONE)] to select minus duplex; push [DUP+ 8(TSQLS)] to select plus duplex. Push MAIN T X DUP Push MAIN T X DUP SIMP 9 4 m Push [SIMP 9(TSQL)] to return to simplex operation. • “DUP” or “DUP–” indicator disappears. , To turn OFF the subaudible tone encoder, push [FUNC] then [ENT C(T-OFF)].
IC-2720H_1.qxd 02.12.18 13:02 Page 25 (1,1) New2001 4 REPEATER OPERATION ■ Subaudible tones USING SET MODE (Encoder function) SET B z Set the main band, mode/channel you wish to set the subaudible tones to, such as VFO mode or memory/call channel. • The subaudible tone frequency is independently programmed into each mode or channel. D Subaudible tones q Select the main band, mode/channel you wish to set the subaudible tones to, such as VFO mode or memory/call channel.
IC-2720H_1.qxd 02.12.18 13:02 Page 26 (1,1) New2001 REPEATER OPERATION D DTMF tones 4 D 1750 Hz tone ➥ Push [DTMF-S], then push the keys of the deDTMF-S 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 normal function control.
IC-2720H_1.qxd 02.12.18 13:02 Page 27 (1,1) New2001 4 REPEATER OPERATION ■ Offset frequency USING SET MODE When communicating through a repeater, the transmit frequency is shifted from the receive frequency by an amount determined by the offset frequency. Independent offset frequencies can be set for each operating frequency. qPush [MAIN•BAND] to select the desired band (left or right) as the main band. • Push [MAIN•BAND] for 1 sec.
IC-2720H_1.qxd 02.12.18 13:02 Page 28 (1,1) New2001 REPEATER OPERATION ■ Auto repeater USING 4 INITIAL SET MODE (U.S.A. version only) The USA version automatically activates the repeater settings (DUP– or DUP+ and tone encoder ON/OFF) when the operating frequency falls within the general repeater output frequency range and deactivate them when outside of the range. D Setting the auto repeater function ON/OFF q Push [PWR] to turn power OFF. w While pushing [SET• mode.
IC-2720H_1.qxd 02.12.18 13:02 Page 29 (1,1) New2001 5 MEMORY OPERATION ■ General description The transceiver has 212 memory channels including 10 scan edge memory channels (5 pairs), and 2 call channels. Each of these channels can be individually programmed with operating frequency (pgs. 11–13), duplex direction (p. 23) and offset (p. 27), subaudible tone encoder or tone squelch and its tone frequency (pgs. 23, 25, 52, 53) and skip information* (p. 44).
IC-2720H_1.qxd 02.12.18 13:02 Page 30 (1,1) New2001 MEMORY OPERATION 5 ■ Programming a memory channel VFO settings, including the set mode contents such as subaudible tone frequency, offset, can be programmed into a memory channel. qSet the desired frequency in the desired band (left or right). ➥ Push the desired band’s [V/MHz•SCAN] to select VFO mode. ➥ Set the frequency using the same band’s [DIAL]. ➥ Set other data (e.g. tone frequency, duplex information, etc.) if required.
IC-2720H_1.qxd 02.12.18 13:02 Page 31 (1,1) New2001 5 MEMORY OPERATION D Programming a memory channel via the microphone The microphone can also be used to program memMW ory channels. z Set 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, subaudible tone encoder ON/OFF and its frequency) , if necessary. x Push [FUNC] then [CLR A(MW)] momentarily.
IC-2720H_1.qxd 02.12.18 13:02 Page 32 (1,1) New2001 MEMORY OPERATION 5 ■ Transferring memory contents This function transfers a memory channel’s contents to VFO (or another memory/call channel). This is useful when searching for signals around a memory channel frequency and for recalling the offset frequency, subaudible tone frequency etc. D Memory/call➪VFO MR/CALL q Select the desired band’s (left or right) memory or call channel.
IC-2720H_1.qxd 02.12.18 13:02 Page 33 (1,1) New2001 5 MEMORY OPERATION D Memory/call➪call/memory q Select the memory/call channel to be transferred. ➥ Push the desired band’s [M/CALL•MW] several times to select memory mode or call channel, then rotate the same band’s [DIAL] to select the desired memory or call channel. w Push the same band’s [M/CALL•MW] for 1 sec. MR/CALL MW [Y]/[Z] • “!” indicator and “– –” indication blink, and shows VFO conditions.
IC-2720H_1.qxd 02.12.18 13:02 Page 34 (1,1) New2001 MEMORY OPERATION 5 ■ Memory clearing Contents of programmed memories can be cleared (blanked), if desired. r Push the same band’s [M/CALL•MW] momentarily, then push the [M/CALL•MW] again for 1 sec. q Push [V/MHz•SCAN] to select VFO mode in the desired band (left or right). w Push the same band’s [M/CALL•MW] for 1 sec. ☞ This operation must be performed within 1.5 sec. • 3 beeps sound, then the frequency is cleared.
IC-2720H_1.qxd 02.12.18 13:02 Page 35 (1,1) New2001 5 MEMORY OPERATION ■ Memory bank selection The IC-2720H has a total of 10 banks (A to J). Regular memory channels, 000 to 199, are assigned into the desired bank for easy memory management. Push [MAIN•BAND] for 1 sec. to select memory bank. q Push the desired band’s [M/CALL•MW] several times to select memory mode, if desired. w Push the same band’s [MAIN•BAND] for 1 sec. to select memory bank condition.
IC-2720H_1.qxd 02.12.18 13:02 Page 36 (1,1) New2001 MEMORY OPERATION 5 ■ Memory bank setting q Push the desired band’s [M/CALL•MW] several times to select memory mode, then select the desired memory channel via the same band’s [DIAL]. w Push the same band’s [MAIN•BAND] for 1 sec. • “– –” indication blinks as follows. y Push the [MAIN•BAND] for 1 sec. then push the [MAIN•BAND] momentarily again to return to regular memory condition.
IC-2720H_1.qxd 02.12.18 13:02 Page 37 (1,1) New2001 5 MEMORY OPERATION ■ Transferring bank contents Contents of programmed memory banks can be cleared or transferred to another bank. INFORMATION: Even if the memory bank contents are cleared, the memory channel contents still remain programmed. q Select the desired bank contents to be transferred or erased in the desired band (left or right). ➥ Push the desired band’s [M/CALL•MW] several times to select memory mode.
IC-2720H_1.qxd 02.12.18 13:02 Page 38 (1,1) CALL CHANNEL OPERATION 6 ■ Call channel selection ■ Call channel transferring Call channel is pre-programmed memory channel that can be accessed by simply pushing call channel button. q Push the desired band’s [M/CALL•MW] several times then rotate the same band’s [DIAL] to select the desired call channel.
IC-2720H_1.qxd 02.12.18 13:02 Page 39 (1,1) New2001 6 CALL CHANNEL OPERATION ■ Programming a call channel r Push the [M/CALL•MW] for 1 sec. to program. Operating frequency, duplex information, subaudible tone information (tone encoder or tone squelch ON/OFF and its frequency) can be programmed into the call channel. • 3 beeps sound and the unit returns to VFO mode automatically. MR/CALL q Set the desired frequency in VFO mode. ➥ Push the desired band’s [V/MHz•SCAN] to select VFO mode.
IC-2720H_1.qxd 02.12.18 13:02 Page 40 (1,1) SCAN OPERATION 7 ■ Scan types Scanning searches for signals automatically and makes it easier to locate new stations for contact or listening purposes. BAND SCAN (p. 41) Band edge Band edge Scan Repeatedly scans all frequencies over the entire band. Used as the simplest scan without any preliminary settings necessary. There are 3 scan types and 4 resume conditions to suit your operating needs. PROGRAMMED SCAN (p.
IC-2720H_1.qxd 02.12.18 13:02 Page 41 (1,1) New2001 7 SCAN OPERATION ■ Scan start/stop D Preparation Scan resume condition (p. 45); program the scan edges (pgs. 42, 43); program 2 or more memory channels (pgs. 30, 31); set skip settings, if desired (p. 44). D Operation q Select 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] for bank scan.
IC-2720H_1.qxd 02.12.18 13:02 Page 42 (1,1) New2001 SCAN OPERATION 7 ■ Scan edges programming Scan edges can be programmed in the same manner as memory channels. Scan edges are programmed into scan edges, 1A/1b to 5A/5b, in memory channels. r Push the [M/CALL•MW] for 1 sec. to program. q Set the edge frequency of the desired frequency range in VFO mode: ➥ Set the frequency using the desired band’s [DIAL]. ➥ Set other data (e.g. repeater settings, etc.) if desired.
IC-2720H_1.qxd 02.12.18 13:02 Page 43 (1,1) New2001 7 SCAN OPERATION D Programming scan edges via microphone MW z Set the desired frequency in VFO mode. ➥ Push [VFO/LOCK] to select VFO mode. ➥ Set the frequency via the keypad or [Y]/[Z]. x Push [FUNC] then [CLR A(MW)] momentarily. c Push [Y] or [Z] to select scan edge channels, 1A, 2A, 3A, 4A or 5A. v Push [FUNC], then push [CLR A(MW)] for 1 sec. to program. b To program a frequency for the other scan edge channels, repeat steps z to v.
IC-2720H_1.qxd 02.12.18 13:02 Page 44 (1,1) New2001 SCAN OPERATION 7 ■ Skip channel setting USING SET MODE The memory skip function speeds up scanning by checking only those memory channels not set as skip channels. Set skip channels as follows. The display shows that memory channel 1 is set as a skip channel. MAIN T X M SKIP q Select a memory channel in the desired band: ➥ Push the desired band’s [M/CALL•MW] to select memory mode.
IC-2720H_1.qxd 02.12.18 13:02 Page 45 (1,1) New2001 7 SCAN OPERATION ■ Scan resume condition USING SET MODE The scan resume condition can be selected as timer or pause scan. The selected resume condition is also used for priority watch. (p. 47) The display shows that the scan will resume 15 sec. after it stops. MAIN T X M SET B z Push [BAND] to select the desired band (left or right) as the main band. x Push [SET B(D-OFF)] to enter set mode.
IC-2720H_1.qxd 02.12.18 13:02 Page 46 (1,1) PRIORITY WATCH 8 ■ Priority watch types Priority watch checks for signals on a VFO frequency every 5 sec. while operating in memory mode. The transceiver has 3 priority watch types to suit your needs. You can also transmit on the VFO frequency while the priority watch operates. The watch resumes according to the selected scan resume condition. See previous page for details.
IC-2720H_1.qxd 02.12.18 13:02 Page 47 (1,1) New2001 8 PRIORITY WATCH ■ Priority watch operation q Select VFO mode; then, set an operating frequency in the desired band (left or right). w Set 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.
IC-2720H_1.qxd 02.12.18 13:02 Page 48 (1,1) 9 DTMF MEMORY ENCODER ■ Programming a DTMF code DTMF tones are used for autopatching, controlling other equipment, etc. The transceiver has 14 DTMF memory channels (d0–dd) for storage of often-used DTMF codes of up to 24 digits. e Rotate the main band’s [DIAL] to select the desired DTMF memory channel. r Push [SET• ]. • The first digit blinks. t Rotate the [DIAL] to select the desired code. y Push [SET• ] to select the next digit.
IC-2720H_1.qxd 02.12.18 13:02 Page 49 (1,1) New2001 9 DTMF MEMORY ENCODER D Programming a DTMF code— via microphone DTMF z Push [FUNC] then [LOW 6(DTMF)] to turn the DTMF encoder ON. b Push [VFO/LOCK] to exit the programming condition. • The [CLR A(MW)] key cannot be used to exit. If pushed, code “A” is input. Reprogram in such a case. • “d” appears in place of the main band’s 100 MHz digit. x Push [SET B(D-OFF)] to enter the DTMF memory programming condition.
IC-2720H_1.qxd 02.12.18 13:02 Page 50 (1,1) New2001 DTMF MEMORY ENCODER 9 ■ Transmitting a DTMF code D Automatic transmission (DTMF memory) qPush [TONE•DTMF] for 1 sec. to turn the DTMF memory encoder 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 DTMF memory channel. r Push [PTT] to transmit the selected DTMF memory content. tPush [TONE•DTMF] for 1 sec. to cancel the DTMF encoder.
IC-2720H_1.qxd 02.12.18 13:02 Page 51 (1,1) New2001 9 DTMF MEMORY ENCODER D Manual transmission z Deactivate the DTMF memory encoder by DTMF-S pushing [FUNC] then [SET B(D-OFF)]. x Push [DTMF-S] to turn the DTMF direct selection ON. • The function indicator (microphone) lights green. ■ DTMF speed v Push [DTMF-S] again to deactivate the DTMF direct selection. The display shows the fastest DTMF speed is selected. MAIN T X M q Push [PWR] for 1 sec. to turn power OFF.
IC-2720H_1.qxd 02.12.18 13:02 Page 52 (1,1) 10 POCKET BEEP AND TONE SQUELCH ■ Pocket beep operation This function uses subaudible tones for calling and can be used as a “common pager” to inform you that someone has called while you were away from the transceiver. y Push [TONE•DTMF] to exit set mode. u Push [TONE•DTMF] several times until “T SQLS” or “SDTCS” are displayed to turn ON the pocket beep with tone squelch or DTCS squelch, respectively.
IC-2720H_1.qxd 02.12.18 13:02 Page 53 (1,1) New2001 10 POCKET BEEP AND TONE SQUELCH z Set the operating frequency. TSQLS x Program the CTCSS tone frequency or DTCS DTCSS code in set mode. ➥ Push [SET B(D-OFF)] to enter set mode. ➥ Push [SET B(D-OFF)] or [ENT C(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 selected.
IC-2720H_1.qxd 02.12.18 13:02 Page 54 (1,1) New2001 POCKET BEEP AND TONE SQUELCH 10 ■ Tone/DTCS squelch operation The tone or DTCS squelch opens only when receiving a signal with the same pre-programmed subaudible tone or DTCS code, respectively. q Set the operating frequency in the main band. w Program the CTCSS tone frequency or DTCS code in set mode. • See p. 52 for programming details. e Push [TONE•DTMF] several times until “T SQL” or “DTCS” appears in the function display.
IC-2720H_1.qxd 02.12.18 13:02 Page 55 (1,1) New2001 10 POCKET BEEP AND TONE SQUELCH ■ Tone scan By monitoring a signal that is being operated with pocket beep, tone or DTCS squelch function, you can determine the tone frequency or DTCS code necessary to open a squelch. q Set the desired operating frequency or memory channel to be checked for a tone frequency or code in the main band. w Push [TONE•DTMF] several times to select the tone type, tone squelch or DTCS, to be scanned.
IC-2720H_1.qxd 02.12.18 13:02 Page 56 (1,1) 11 OTHER FUNCTIONS ■ Set mode • Set mode operation z Push [BAND] to select the main band. q Push the desired band’s [MAIN•BAND] to select the main band. w Push [SET• ] to enter the set mode. e Push [SET• ] or [LOW•PRIO] to select the desired item. r Rotate the main band’s [DIAL] to select the condition or value. t Push [TONE•DTMF] to exit set mode. SET x Push [SET B(D-OFF)] to enter set mode.
IC-2720H_1.qxd 02.12.18 13:02 Page 57 (1,1) New2001 11 OTHER FUNCTIONS D Display dimmer D Tone squelch tone Adjust to suit lighting conditions. The levels 1 (dark) to 4 (bright: default) are available. Sets 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) MAIN T X T SQL MAIN T X M M D Display color The display color can be set to amber (default) or green.
IC-2720H_1.qxd 02.12.18 13:02 Page 58 (1,1) New2001 OTHER FUNCTIONS 11 D DTCS polarity D Scan resume timer Sets DTCS polarities for transmission and reception from “nn,” “nr,” “rn” and “rr.” (default: nn) Selects 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 resumes. • SCP-2 : Pause on a signal until signal disappears, then resumes 2 sec. after the signal disappears.
IC-2720H_1.qxd 02.12.18 13:02 Page 59 (1,1) New2001 11 OTHER FUNCTIONS D Wide/Narrow setting (Left band only) D Weather alert function Sets both the transmission and reception passband width from wide and narrow. When narrow is set, the transmission deviation and reception passband width become half of the wide setting (approx.). This setting can be set for each memory, call and VFO independently. This item appears when set mode is accessed from left band only.
IC-2720H_1.qxd 02.12.18 13:02 Page 60 (1,1) New2001 OTHER FUNCTIONS ■ Initial set mode AT 11 POWER ON The initial set mode is accessed at power ON and allows you to set seldom-changed settings. In this way, you can “customize” transceiver operations to suit your preference and operating style. D Entering initial set mode q While pushing [SET• ] push [PWR] for 1 sec. to enter initial set mode. w Push [SET• ] or [LOW•PRIO] to select the desired item.
IC-2720H_1.qxd 02.12.18 13:02 Page 61 (1,1) New2001 11 OTHER FUNCTIONS D Key-touch beep D Auto repeater The key-touch beep can be turned OFF for silent operation. (default: ON) MAIN T X MAIN T X M M D Time-out timer To prevent accidental prolonged transmission, etc., the transceiver has a time-out timer. This function cuts a transmission OFF after 1–30 min. of continuous transmission. This timer can be cancelled. • TOT-OF : The time-out timer is turned OFF.
IC-2720H_1.qxd 02.12.18 13:02 Page 62 (1,1) New2001 OTHER FUNCTIONS 11 D Cooling fan control D Squelch delay Selects 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. Selects squelch delay from short and long to prevent repeated opening and closing of the squelch during reception of the same signal. •S : Short squelch delay.
IC-2720H_1.qxd 02.12.18 13:02 Page 63 (1,1) New2001 11 OTHER FUNCTIONS D Active band D Sub band mute Selects 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 selected continuously. (default) • Single (SI) : The operating frequency can be selected within the current band. Pushing [MAIN•BAND] for 1 sec. then tuning dial rotation is necessary for frequency band selection.
IC-2720H_1.qxd 02.12.18 13:02 Page 64 (1,1) New2001 OTHER FUNCTIONS 11 ■ AM/FM narrow mode [ The IC-2720H has AM mode reception for both the left and right bands, and FM narrow mode is available for the left band. Typically, AM mode is used for the air band (118–135.995 MHz). The FM narrow mode selection is available for the USA version’s left band only. qSelect the desired frequency band in VFO mode, or the desired memory channel on the left or right band as desired.
IC-2720H_1.qxd 02.12.18 13:02 Page 65 (1,1) New2001 11 OTHER FUNCTIONS ■ Weather channel operation (USA version only) D Weather channel selection Push [M/CALL•MW] several times to select the WX channel group. q Select the desired weather channel. w Turn the weather alert function ON in set mode. ➥ Push [SET• ] to enter set mode. ➥ Push [SET• ] or [LOW•PRIO] to select the weather alert item, then rotate the [DIAL] to set ON. ➥ Push [TONE•DTMF] to exit set mode. e Sets the desired stand-by condition.
IC-2720H_1.qxd 02.12.18 13:02 Page 66 (1,1) New2001 OTHER FUNCTIONS ■ Microphone keys 11 D [F-1]/[F-2] keys on HM-133 The 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 the function keys on the transceiver’s front panel.
IC-2720H_1.qxd 02.12.18 13:02 Page 67 (1,1) New2001 11 OTHER FUNCTIONS ■ Partial reset AT POWER ON If you want to initialize the operating conditions (VFO frequency, VFO settings, set mode contents) without clearing the memory contents, a partial resetting function is available for the transceiver left and right bands independently. ➥ While pushing desired band’s [V/MHz•SCAN], turn the power ON to partially reset the desired band (left or right).
IC-2720H_1.qxd 02.12.18 13:02 Page 68 (1,1) New2001 OTHER FUNCTIONS ■ Data cloning AT 11 POWER ON Cloning allows you to quickly and easily transfer the programmed contents from one transceiver to another; or , data from a personal computer to a transceiver using the optional CS-2720 CLONING SOFTWARE. D Cloning between transceivers q Connect the OPC-474 cloning cable to the [SP-2] jack of the master and sub-transceivers.
IC-2720H_1.qxd 02.12.18 13:02 Page 69 (1,1) New2001 11 OTHER FUNCTIONS D Cloning using a personal computer Data can be cloned to and from a personal computer (Microsoft® Windows® 98/2000/Me/XP) using the optional CS2720 CLONING SOFTWARE and the optional cloning cable OPC-478U (USB type) or OPC-478 (RS-232C type). Consult the CS-2720 CLONING SOFTWARE HELP file for details. D Cloning error ☞ NOTE: DO NOT push any key on the sub-transceiver during cloning. This will cause a cloning error.
IC-2720H_1.qxd 02.12.18 13:02 Page 70 (1,1) New2001 OTHER FUNCTIONS 11 D 1200 bps packet operation q Connect the transceiver and a TNC as illustrated below. TNC side q DATA IN w GND TX AUDIO GND e PTT P y P SQL t AF OUT • Read the instructions supplied with your TNC carefully before attempting packet operation with the transceiver. • Pin t AF OUT is for 1200 bps operation only. This pin cannot be used for 9600 bps operation. • Over modulation may degrade signal quality.
IC-2720H_1.qxd 02.12.18 13:02 Page 71 (1,1) New2001 11 OTHER FUNCTIONS D 9600 bps high speed packet operation The transceiver supports 2 modes of 9600 bps packet operation: G3RUH and GMSK. q Connect the transceiver and a TNC as illustrated below. TNC side q DATA IN w GND e PTT P TX AUDIO GND r DATA OUT y P SQL RX AUDIO PTT SQL w G3RUH mode can handle 16 kinds of modulated wave forms in order to maintain a communication link. e Set transmit delay on the TNC to 30–50.
IC-2720H_1.qxd 02.12.18 13:02 Page 72 (1,1) New2001 OTHER FUNCTIONS D Adjusting the transmit signal output from the TNC When setting data transmission speed to 9600 bps, the data signal coming from the TNC is applied exclusively to the internal limiter circuitry to automatically maintain band width. NEVER apply data levels from the TNC of over 0.6 V p-p, otherwise the transceiver will not be able to maintain the band width and may possibly interfere with other stations. 1.
IC-2720H_1.qxd 02.12.18 13:02 Page 73 (1,1) New2001 12 MAINTENANCE ■ Troubleshooting PROBLEM Does not turn on. If your transceiver seems to be malfunctioning, please check the following points before sending it to a service center. POSSIBLE CAUSE • Power connector has a poor contact. • Polarity of the power connection is reversed. • Blown fuse. No sound comes from the • Volume is too low. • The audio mute function is activated. speaker. • Squelch is set too high.
IC-2720H_1.qxd 02.12.18 13:02 Page 74 (1,1) New2001 MAINTENANCE PROBLEM POSSIBLE CAUSE SOLUTION Some memory channels • The memory channel number has not yet been • Select the channel via the microphone keypad to cannot be selected via the programmed. check whether the channel has been programmed tuning dial. or not. Scan does not operate. 12 REF. — • The squelch is open. • Set the squelch to the threshold point. p.
IC-2720H_1.qxd 02.12.18 13:02 Page 75 (1,1) New2001 13 SPECIFICATIONS AND OPTIONS ■ Specifications D TRANSMITTER D GENERAL • Frequency coverage : • Modulation system • Output power : Variable reactance frequency modulation : VHF 50/15/5 W* (approx.) UHF 35/15/5 W* (approx.) • Max. frequency deviation : ±5.0 kHz (wide) ±2.5 kHz (narrow: Left band only) : Less than –60 dB : 8-pin modular (600 Ω) (unit: MHz) *25/15/5 W only for the Taiwan version. Version Left Band USA, General Rx: 118–549.
IC-2720H_1.qxd 02.12.18 13:02 Page 76 (1,1) New2001 SPECIFICATIONS AND OPTIONS • Squelch sensitivity† (threshold) • Selectivity† (typical) Wide Narrow (USA only) • Spurious and image rejection† • AF output power† (at 13.8 V DC) : Less than 0.13 µV : More than 12 kHz/6 dB Less than 30 kHz/60 dB More than 6 kHz/6 dB Less than 20 kHz/60 dB : More than 60 dB : More than 2.4 W at 10% distortion with an 8 Ω load • Ext. speaker connectors : 3-conductor 3.
IC-2720H_1.qxd 02.12.18 13:02 Page 77 (1,1) New2001 14 MODE ARRANGEMENT INITIAL SET MODE VFO mode (p. 12) MAIN T X MAIN T X MAIN T X MAIN T X MAIN T X M Key-touch beep (p. 61) PWR MAIN T X MAIN T X MAIN T X M/CALL MW M MAIN T X Sub band mute (p. 63) A MAIN T X M M DTMF speed (p. 63) Active band (p. 63) SET MODE TONE DTMF WEATHER CHANNEL (p. 65) (USA version only) M Auto repeater (p. 61) (USA version only) MAIN T X M MAIN T X M LOW PRIO M CALL CHANNEL (p.
IC-2720H_1.qxd 02.12.18 13:02 Page 78 (1,1) New2001 MODE ARRANGEMENT 14 MODE MAIN T X MAIN T X DUP MAIN T X M Time-out timer (p. 61) : SET M M Auto repeater (p. 61) (USA version only) MAIN T X MAIN T X M Auto power off (p. 61) M Cooling fan (p. 62) M Data speed (p. 62) Packet operation band (p. 62) LOW PRIO : MAIN T X MAIN T X MAIN T X M M DTMF speed (p. 63) MAIN T X MAIN T X Display color (p. 57) SET : T MAIN T X M T SQL Tone squelch frequency (p.
IC-2720H_1.qxd 02.12.18 13:02 Page 79 (1,1) New2001 A-6124D-1EX-q Printed in Japan © 2002 Icom Inc.
