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INSTRUCTION MANUAL

i2720H

DUAL BAND FM TRANSCEIVER

This device complies with Part 15 of the FCC rules. Operation is sub-
ject 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.

New2001

IC-2720H_2.qxd 03.5.13 9:45 Page 1 (1,1)

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Summary of Contents for IC-2720H

Page 1: ...5 of the FCC rules Operation is sub ject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference...

Page 2: ...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 IMPORTANT RE...

Page 3: ...transceiver NEVER place the transceiver where normal operation of the vehi cle may be hindered or where it could cause bodily injury NEVER let objects impede the operation of the cooling fan on the r...

Page 4: ...ITIONS i PRECAUTION ii SUPPLIED ACCESSORIES iii TABLE OF CONTENTS iii QUICK REFERENCE GUIDE I XII Installation I Your first contact VIII Repeater operation X Programming memory channels XI 1 PANEL DES...

Page 5: ...SCAN OPERATION 40 45 Scan types 40 Scan start stop 41 Scan edges programming 42 Skip channel setting 44 Scan resume condition 45 8 PRIORITY WATCH 46 47 Priority watch types 46 Priority watch operatio...

Page 6: ...lied 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 M...

Page 7: ...sceiver or remote controller where hot or cold air blows directly onto it AVOID placing the transceiver or remote controller in direct sunlight D Using the mounting bracket qDrill 4 holes where the mo...

Page 8: ...tach the remote controller to the MB 84 and tighten the controller using with the supplied screws eTighten the controller with bracket Using the optional MB 65 MB 84 supplied Optional MB 65 Adjust the...

Page 9: ...BRACKET you can 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 to the ma...

Page 10: ...nect the cable connector with the ferrite core into the main unit CONTROLLER socket as below D Microphone connection Two microphone connectors are available for the IC 2720H one is on the controller s...

Page 11: ...ONNECTING TO A DC POWER SOURCE D DC power supply connection 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...

Page 12: ...et and soft solder w Strip the cable as shown at left Soft solder the cen ter conductor e Slide the connector body on and solder it r Screw the coupling ring onto the connector body 10 mm 3 8 in NOTE...

Page 13: ...Resetting the CPU is necessary to start from factory default While pushing both band s M CALL MW push PWR for 1 sec to reset the CPU 2 Selecting the main band The IC 2720H displays 2 frequencies on le...

Page 14: ...ntarily to return to frequency indi cation 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 s...

Page 15: ...TMF several times until T appears if the re peater requires a subaudible tone to be accessed Using the HM 133 Plus or minus duplex selection and the repeater tone setting can be made easily via HM 133...

Page 16: ...elect 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 CA...

Page 17: ...eypad 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 e Push Y Z to select the desired memory chann...

Page 18: ...ocket beep DTCS DTCS squelch or tone func tion OFF can be selected Turns DTMF memory encoder ON and OFF when pushed for 1 sec p 48 tDUPLEX MONITOR SWITCH DUP MONI Push to select DUP DUP and simplex op...

Page 19: ...mming when pushed 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 th...

Page 20: ...ICATORS 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 wi...

Page 21: ...the lock function is activated p 15 iSKIP INDICATOR p 44 Appears when the displayed memory channel is specified as a skip channel oMEMORY INDICATOR pgs 12 29 Appears when memory mode is selected 0S RF...

Page 22: ...er 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 antenna wit...

Page 23: ...p 62 for details on how to toggle data speed between 1200 AFSK and 9600 bps G3RUH GMSK wGND Common ground for DATA IN DATA OUT and AF OUT ePTT P PTT terminal for packet operation only Connect ground...

Page 24: ...while the one touch PTT function is in use tKEYPAD pgs 8 9 yFUNCTION INDICATOR Lights orange while FUNC is activated indicates the secondary function of switches can be accessed Lights green when DTM...

Page 25: ...nd select ing condition p 12 In memory mode enters bank selecting condition p 35 Starts and stops tone scanning p 55 Turns the one touch PTT function ON and OFF p 21 Turns the DTCS squelch ON p 53 Tur...

Page 26: ...nt p 16 Selects a memory channel for program ming p 31 Advances the memory channel number when continuously pushed after pro gramming is completed p 31 DTMF memory encoder function OFF p 50 Turns the...

Page 27: ...nge 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 SWITCH Slide to toggle UP DN switches function ON and OFF rKEYP...

Page 28: ...he 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 qP...

Page 29: ...and memory modes The transceiver has 2 basic operating modes VFO mode and memory mode Select VFO mode first to set an operating fre quency Push the desired band s V MHz SCAN to select VFO mode When VF...

Page 30: ...h Y Z or CLR A MW to cancel it Using the keypad The frequency can be directly set via numeral keys on the mi crophone z Push BAND to select the desired band left or right as the main band Push VFO LOC...

Page 31: ...rea q Push the desired band s MAIN BAND to select the main band Push the same band s V MHz SCAN to select VFO mode if necessary wPush SET to enter set mode ePush SET or LOW PRIO several times until tS...

Page 32: ...k function is in use Also TONE 1 TONE 2 DTMF tones or DTMF memory contents can be transmitted from the mi crophone Push VFO LOCK for 1 sec to switch the lock function ON and OFF D Microphone keypad lo...

Page 33: ...sted with VOLY TONE 1 VOLZ 0 TONE 2 and SQLY D MUTE SQLZ 16KEY L respectively VOL for audio or SqL for squelch appears during set Monitor function This function is used to listen to weak signals witho...

Page 34: ...han 19 activates the squelch attenuator NOTE The squelch attenuator functions even when the monitor function is in use Thus set the SQL control within 10 to 12 o clock position is recommended when usi...

Page 35: ...per form the following operation z Push FUNC the push BANK 1 MONI to se lect frequency band selecting condition The frequency band initial appears on the main band x Push Y Z to select the desired fre...

Page 36: ...rs in the display as shown above eRotate the left band s DIAL to select the condition rPush PWR momentarily to exit initial set mode and return to the previous indications While pushing SET push PWR t...

Page 37: ...t powers during short distance communications may reduce the possibility of interference to other stations and will reduce current consumption Push LOW PRIO once or twice to select the output power ap...

Page 38: ...eep sounds when transmission is started and a long beep sounds when returning to receive blinks when transmitting with the one touch PTT function c Push FUNC then PRIO 3 PTT M to turn the one touch PT...

Page 39: ...auto repeater function Thus the steps 3 and 4 may not be necessary depending on the setting Repeater settings can be stored into a memory channel Step 3 Set the duplex shifting direction duplex or dup...

Page 40: ...a different tone system see p 26 r Push and hold PTT to transmit The displayed frequency automatically changes to the transmit frequency repeater input frequency If OFF appears confirm that the offset...

Page 41: ...or the tone frequency setting When the repeater requires a different tone system see p 26 v Push and hold PTT to transmit b Release PTT to receive n Push MONI 1 BANK to check whether the other station...

Page 42: ...baudible tones to such as VFO mode or memory call channel The subaudible tone frequency is independently pro grammed into each mode or channel x Push SET B D OFF to enter set mode c Push SET B D OFF o...

Page 43: ...convenient The transceiver has 14 DTMF memory channels for au topatch operation See p 48 for details D 1750 Hz tone The microphone has 1750 Hz tone capability used for ring tone when calling etc z Pus...

Page 44: ...quency yPush TONE DTMF to exit set mode z Push BAND to select the desired band left or right as the main band Enter the desired frequency via the keypad if neces sary x Select the desired mode channel...

Page 45: ...Pt display appears as shown above right r Rotate 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...

Page 46: ...Programmed memory channels only can be se lected D Using the Y Z keys z Push BAND to select the desired band as the main band x Push MR CALL to select memory mode c Push Y or Z to select and set the...

Page 47: ...eft 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 wPush the same band...

Page 48: ...d 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 ne...

Page 49: ...to the VFO VFO mode is selected automatically z Push BAND to select the desired band as the main band if necessary x Select the memory call channel to be transferred Push MR CALL to select memory mod...

Page 50: ...t memory mode then select the desired memory channel via Y Z or keypad Push MR CALL for 1 sec then push Y Z to select the desired call channel x Push FUNC then CLR A MW momentarily indicator and indic...

Page 51: ...performed within 1 5 sec 3 beeps sound then the frequency is cleared indicator and the channel number blink continuously When clearing the call channel the current VFO conditions are re programmed int...

Page 52: ...tents in the bank No channel numbers are displayed for memory bank operation y To return to regular memory condition push the MAIN BAND for 1 sec then push the MAIN BAND mo mentarily again z Push MR C...

Page 53: ...y again to return to regular mem ory condition u Repeat steps q to y to set another memory channel into the same or another bank z Push MR CALL then select the desired mem ory channel via Y Z or keypa...

Page 54: ...Select indication when erasing the contents from the bank r Push the M CALL MW again Bank initial or indication stops blinking t Push the MAIN BAND for 1 sec then push the MAIN BAND momentarily again...

Page 55: ...e band s DIAL to select the desired call channel C1 or C2 appears w Push the M CALL MW for 1 sec then rotate the DIAL to select the memory channel to transfer the contents to indicator and memory chan...

Page 56: ...Push the M CALL MW for 1 sec to program 3 beeps sound and the unit returns to VFO mode automatically z Set the desired frequency in VFO mode Push VFO LOCK to select VFO mode Set the frequency Set oth...

Page 57: ...1A 1b P1 2A 2b P2 3A 3b P3 4A 4b P4 5A 5b P5 Band edge Band edge Scan edges Scan Jump 1A 2A 3A 4A 5A 1b 2b 3b 4b 5b Start End MEMORY SCAN p 41 Repeatedly scans memory channels except those set as ski...

Page 58: ...he scan push the V MHz SCAN z Push VFO LOCK to select VFO mode for full programmed scan push MR CALL to select memory mode for memory scan in the main band Push FUNC then MONI 1 BANK to select a bank...

Page 59: ...nnel 1A 2A 3A 4A or 5A r Push 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 when continuing to push the M CAL...

Page 60: ...o program 3 beeps sound and VFO is automatically selected Memory channel number advances to the next scan edge channel 1b 2b 3b 4b or 5b when continuing to push CLR A MW after programming b To program...

Page 61: ...the selected channel appears The channel is skipped during scan CHS On disappears The channel is scanned during scan CHS OF t Push TONE DTMF to exit set mode z Select a memory channel Select memory m...

Page 62: ...can 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 then re...

Page 63: ...one squelch function when pri ority watch starts MEMORY CHANNEL WATCH While operating on a VFO fre quency priority watch checks for a signal on the selected memory channel every 5 sec MEMORY SCAN WATC...

Page 64: ...ition p 45 While the watch is pausing pushing the M CALL PRIO re sumes the watch manually r Push LOW PRIO for 1 sec to stop the watch z Select VFO mode then set the desired fre quency x Set the watchi...

Page 65: ...red 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 Pushing LOW PRIO move the cursor backward u Repeat the steps...

Page 66: ...evious memory contents are cleared automatically E stands for M M 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 indication increases...

Page 67: ...y Exit the programming condition automatically Each push of PTT transmits the DTMF code b Push FUNC then SET B D OFF to cancel the DTMF memory encoder When the DTMF encoder is turned ON continuously e...

Page 68: ...TMF S again to deactivate the DTMF direct selection DTMF speed The rate at which DTMF memories send individual DTMF characters can be set to accommodate operating needs q Push PWR for 1 sec to turn po...

Page 69: ...et beep with tone squelch or DTCS squelch respectively i When a signal with the matched tone is received the transceiver emits beep tones and blinks S Beep tones sound for 30 sec and S blinks To stop...

Page 70: ...D Available tone frequency list NOTE The transceiver has 50 tone frequencies and con sequently their spacing is narrow compared to units having 38 tones Therefore some tone frequencies may receive int...

Page 71: ...NE DTMF several times until T SQL or DTCS disappears z Set the operating frequency x Program the CTCSS tone frequency or DTCS code in set mode See p 53 for programming details c Push FUNC then SIMP 9...

Page 72: ...ed The decoded CTCSS tone frequency or 3 digit DTCS code is used for the tone encoder or tone encoder decoder depending on the selected tone condition or type in step w T SQL CTCSS tone encoder decode...

Page 73: ...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 LOW PRIO Set...

Page 74: ...Total of 50 tone frequencies 67 0 254 1 Hz are available default 88 5 Hz Available subaudible tone frequencies D D DTCS code Sets DTCS code both encoder and decoder for DTCS squelch operation Total of...

Page 75: ...n operating frequency band and versions D D Scan resume timer 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 re sumes SCP 2 Pause on...

Page 76: ...ands This setting can be set for each memory call and VFO inde pendently D D Weather alert function Turns weather alert function ON and OFF D D 1st Lo frequency selection Selects the 1st Lo Local Osci...

Page 77: ...sired item e Rotate left band s DIAL to select the condition or value r Push PWR momentarily to exit initial set mode AT POWER ON MAIN T X MAIN T X MAIN T X DUP MAIN T X MAIN T X MAIN T X MAIN T X MAI...

Page 78: ...ide of 145 200 145 495 146 610 146 995 147 000 147 395 442 000 444 995 and 447 000 449 995 MHz range The off set and repeater tone frequencies are not changed by the auto repeater function reset these...

Page 79: ...e operated for packet D D Squelch delay Selects squelch delay from short and long to prevent re peated opening and closing of the squelch during reception of the same signal S Short squelch delay defa...

Page 80: ...band selection D D DTMF speed The rate at which DTMF memories send individual DTMF characters can be set to accommodate operating needs 1 100 msec interval 5 0 cps speed default 2 200 msec interval 2...

Page 81: ...n item Select nAr for Wide Narrow setting Select COn for operating mode setting rRotate the same band s DIAL to select FM narrow or AM as desired AM appears when AM mode is selected tPush TONE DTMF to...

Page 82: ...le scanning 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...

Page 83: ...ignment q Turn the power OFF w While pushing the desired UP or DN key on the micro phone turn the power ON D D F 1 F 2 keys on HM 133 The following conditions in the main band or both left and right b...

Page 84: ...lay may occasionally display erroneous in formation e g when first applying power This may be caused externally by static electricity or by other factors If this problem occurs turn power OFF After wa...

Page 85: ...r only power on only for sub transceiver CLOnE appears and the transceivers enter the clone standby condition e Push the same M CALL MW on the master transceiver CLOnE OUt appears in the master transc...

Page 86: ...lt or 9600 bps q While pushing SET turn power ON to enter initial set mode w Push SET or LOW PRIO to select the bPS item e Rotate the left band DIAL to select the desired data speed r Push PWR to exit...

Page 87: ...the received audio output level when receiving a TNC modulated signal with high level voice signals using the microphone Then adjust the TNC mod ulated signal to a lower level than the voice modulate...

Page 88: ...ion if necessary see page at right When using the PTT P terminal for packet operation no voice signals are transmitted from the microphone When pushing PTT during data transmission data transmission i...

Page 89: ...c on the TNC then trans mit some test data e When the transceiver fails to transmit the test data or transmits sporadically TX indicator doesn t appear or flashes Decrease the TNC output level until t...

Page 90: ...udible 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 func...

Page 91: ...ime out timer is activated One touch PTT function is activated The CPU is malfunctioning Select the channel via the microphone keypad to check whether the channel has been programmed or not Set the sq...

Page 92: ...on 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...

Page 93: ...B 84 REMOTE CONTROLLER BRACKET Same as that supplied with the transceiver MB 85 COMBINATION BRACKET Used for single body installation 20 cm 77 8 in remote control cable is supplied MB 65 MOUNTING BASE...

Page 94: ...PWR Key touch beep p 61 Time out timer p 61 Auto repeater p 61 USA version only A Active band p 63 DTMF speed p 63 Sub band mute p 63 SET MODE DTMF MEMORY CLONE MODE CALL CHANNEL p 38 WEATHER CHANNEL...

Page 95: ...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 MODE Display color p 57 Repeater tone frequency p 57 Tone squelc...

Page 96: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan A 6124D 1EX w Printed in Japan 2002 2003 Icom Inc New2001 IC 2720H_2 qxd 03 5 13 9 45 Page 79 1 1...

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