Icom IC-2720 Instruction Manual Download

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PANEL DESCRIPTION

New2001

■

Main unit

DATA SOCKET [DATA]

Connects a TNC (Terminal Node Controller), etc. for data
communications.

• See p. 6 for connection information.

MICROPHONE CONNECTOR [MIC]

Connects the supplied or an optional microphone.

+8 V DC output (Max. 10 mA)

Channel up/down

8 V control IN

PTT

GND (microphone ground)

MIC (microphone input)

GND

Data IN

CONTROLLER CONNECTOR [CONTROLLER]

(p. V)

Connects the controller unit with the supplied cable.

COOLING FAN

Rotates while transmitting.
Also rotates while receiving depending on the setting in ini-
tial set mode. (p. 62)

ANTENNA CONNECTOR [ANT]

Connects a 50

Ω

antenna with a PL-259 connector and a

Ω

coaxial cable.

ANTENNA INFORMATION

For radio communications, the antenna is of critical impor-
tance, to maximize your output power and receiver sensi-
tivity. The transceiver accepts a 50

Ω

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.

y u

IC-2720H_2.qxd 03.5.13 9:45 Page 5 (1,1)

Summary of Contents for IC-2720

Page 1: ...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 ...

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 READ ALL INSTRUCTIONS carefully and completely before using the transceiver SAVE THIS INSTRUCTION MANUAL This in struction manual contains important operating instructions for the IC 2720H EXPLICIT DEF...

Page 3: ...e 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 rear panel DO NOT push the PTT when not actually desiring to transmit DO NOT allow children to play with any radio equipment contain ing a transmitter During mobile operation DO NOT operate the transc...

Page 4: ...NITIONS 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 DESCRIPTION 1 10 Front panel controller 1 Function display 3 Main unit 5 Microphone HM 133 7 Microphone keypad 8 Optional microphones HM 118N TN TAN 10 2 SETTING A FREQUENCY 11 15 Preparation 11 Using t...

Page 5: ...7 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 operation 47 9 DTMF MEMORY ENCODER 48 51 Programming a DTMF code 48 Transmitting a DTMF code 50 DTMF speed 51 10 POCKET BEEP AND TONE SQUELCH 52 55 Pocket beep operation 52 Tone DTCS squelch operation 54 Ton...

Page 6: ...plied 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 micro phone cabl...

Page 7: ...iver 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 mounting bracket is to be installed Approx 5 5 6 mm 1 4 when using nuts approx 2 3 mm 1 8 when using self tapping screws wInsert the supplied screws nuts and washers through the mounting bracket and tighte...

Page 8: ...ttach 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 view ing angle for maximum visibili ty of the function display MB 84 MB 84 Over head mounting Standard mounting Remote controller Supplied screws Supplied screws Self tapping screws Remote controlle...

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 main unit is recommended Example 1 Example 2 Quick reference guide IC 2720H_2 qxd 03 5 13 9 45 Page IV 1 1 ...

Page 10: ...nnect 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 side panel and another is on the main unit front panel Connect the supplied microphone to either the desired con nector as illustrated below Controller Main unit Ferrite core Controller Main unit See ...

Page 11: ...CONNECTING 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 POWER SUPPLY See p 74 for fuse replacement DC power supply 13 8 V to an AC outlet Fuses 20 A black red IC 2720H IC 2720H Fuses 20 A black red 12 V Grommet NOTE Use terminals for the cable connection...

Page 12: ...ket 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 There are many publications covering proper an tennas and their installation Check with your local dealer for more information and recommendations 30 mm 10 mm soft solder 10 mm 1 2 mm solder solder S...

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 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 left or right MAIN BAND to se lect the m...

Page 14: ...entarily 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 speed Using the HM 133 You can directly enter the frequency with the HM 133 keypad for the main band MAIN T X MAIN T X MAIN T X MAIN T X EXAMPLE Setting frequency to 145 3625 MHz Push Push Push Push R...

Page 15: ...DTMF 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 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 MAIN T X DUP MAIN T X DUP MAIN T X T Push Push then Push MAIN T X DUP T ...

Page 16: ...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 3 Writing a memory channel Push and hold the M CALL MW for 1 sec to program 3 beeps...

Page 17: ...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 e Push Y Z to select the desired memory channel r Push FUNC then push CLR A MW for 1 sec to pro gram 3 beeps sound Memory channel number automatically increases when continu ing to push CLR A MW after programming MAIN T X M Push then Quick refe...

Page 18: ...pocket 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 operation p 23 Push for 1 sec to switch the monitor function ON and OFF p 16 MAIN BAND SCAN MW V MHz M CALL MAIN BAND SCAN V MHz MW M CALL VOL VOL DIAL DIAL SQL SQL DUP MONI TONE DTMF LOW PRIO DUAL BAN...

Page 19: ...amming 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 the set mode item and the scanning direction p 41 for the relative band 1SQUELCH CONTROL SQL Varies the squelch level for relative band p 16 The RF attenuator activates and increases the attenuation wh...

Page 20: ...DICATORS 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 BUSY LOWMID BUSY LOWMID MAIN T X DUP T SQL DTCS AM MAIN T X DUP T SQL DTCS AM M SKIP M SKIP q w e r t y...

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 INDICATORS Shows the relative signal strength while receiving sig nals p 16 Shows the output power level while transmitting p 20 1OUTPUT POWER INDICATORS LOW appears when low output power MID appear...

Page 22: ... 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 Ω antenna with a PL 259 connector and a 50 Ω coaxial cable ANTENNA INFORMATION For radio communications the antenna is of critical impor tance to maximize your output power and receiver sensi tivity The transceive...

Page 23: ...See 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 to transmit data rDATA OUT Data out terminal for 9600 bps operation only tAF OUT Data out terminal for 1200 bps operation only yP SQL Becomes high 5 V when the transceiver receives a sig nal which ...

Page 24: ...n 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 DTMF S is activated DTMF sig nals can be transmitted with the keypad u2nd FUNCTION SWITCH FUNC iDTMF SELECT SWITCH DTMF S p 50 oFUNCTION SWITCHES F 1 F 2 p 66 Program and recall your desired transceiver...

Page 25: ...and 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 Turns the DTCS pocket beep function ON p 53 Turns the DTMF memory encoder function ON p 49 Turns the subaudible tone encoder ON p 24 Turns the CTCSS pocket beep function ON p 53 Turns the tone squelch f...

Page 26: ...ent 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 subaudible tone encoder pocket beep or CTCSS DTCS tone squelch OFF pgs 24 53 Mutes the audio p 21 Mute function is released when any oper ation is performed Sends a 1750 Hz tone signal for 0 5 sec p ...

Page 27: ...ange 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 rKEYPAD HM 118TN TAN only While pushing PTT push the desired key to send the DTMF code w q ON OFF e w r q ON OFF e HM 118N HM 118TN TAN DTMF IC 2720H_2 qxd 03 5 13 9 45 Page 10 1 1 ...

Page 28: ...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 qPush the desired band s MAIN BAND for 1 sec Frequency band initial appears wRotate the same band s DIAL to select the desired fre quency band Pushing Y Z on the microphone also selects the band ePush ...

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 VFO mode is already selected the digit below 10 MHz the digit below 1 MHz or 100 kHz disappear depending on ver sions disappear In this case push V MHz SCAN again or twice or 3 times depending on versi...

Page 30: ...sh 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 LOCK to select VFO mode if necessary x Push ENT C T OFF to activate the keypad for digit input c Push 6 keys to input a frequency When a digit is mistakenly input push ENT C T OFF to clear the input the...

Page 31: ...area 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 ap pears as shown below rRotate the same band s DIAL to select the desired tuning step tPush TONE DTMF to exit set mode z Push BAND to select the desired band left or right as the main band Push VFO...

Page 32: ...ck 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 lock This function locks the microphone keypad Push FUNC then SQLZ D 16KEY L to switch the microphone keypad lock function ON and OFF PTT VFO LOCK MR CALL BAND Y Z F 1 F 2 DTMF S and FUNC on the micro ...

Page 33: ...usted 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 without disturb ing the squelch setting Push DUP MONI for 1 sec to open the squelch Push MIN BAND to select the desired band left or right as the main band in advance BUSY blinks Push DUP MONI for 1 sec a...

Page 34: ...than 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 using the monitor function D Squelch attenuator setting qTurn the transceiver power OFF wWhile pushing SET turn the power ON to enter initial set mode ePush SET or LOW PRIO to select Att On squelch atte...

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 frequency band band c Push CLR A MW to exit the condition and re turn to frequency indication v Push VFO LOCK to change main band then repeat the steps z to c for the other band NOTE Memory channels are...

Page 36: ...ars 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 to enter initial set mode MAIN T X M The display shows that the sub band mute is turned ON and sub band busy beep is turned ON 19 3 BASIC OPERATION New2001 Sub band mute sub band busy beep USING INITI...

Page 37: ...ut 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 approx The output power can be changed while transmitting The microphone can also be used to select output power Push HIGH 4 DTCS for high output power MID 5 DTCSS for middle output power and LOW 6 DTM...

Page 38: ...beep 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 PTT function OFF The activity indicator goes out Audio mute function This function temporarily mutes the audio without disturbing the volume setting Push FUNC then SQLY D MUTE to mute audio signals The...

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 duplex Set the offset frequency shifting value if required Step 4 Set the subaudible tone repeater tone encoder function ON Set the subaudible tone frequency if required Step 1 Set the desired band to o...

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 frequency p 27 is set correctly t Release PTT to receive yPush DUP MONI to check whether the other station s transmit signal can be received directly uTo return to simplex operation push DUP MONI on...

Page 41: ...for 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 s transmit signal can be received directly m Push SIMP 9 TSQL to return to simplex opera tion DUP or DUP indicator disappears To turn OFF the subaudible tone encoder push FUNC then ENT C T OFF SIMP ...

Page 42: ...ubaudible 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 or ENT C T OFF several times until T and rt appears or until T SQL and Ct appears for tone squelch or pocket beep use When d is displayed in place of the 100 MHz digit cancel the DTMF memory encoder i...

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 Push FUNC The function indicator lights orange x Push M M TONE 1 to transmit a 1750 Hz tone call signal for 0 5 sec push and hold 0 TONE 2 to transmit a 1750 Hz tone call signal for an arbitrary period ...

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 you wish to set the offset frequency to such as VFO mode or memory call channel The offset frequency can be independently pro grammed into each mode or channel c Push SET B D OFF to enter set mode v...

Page 45: ...rPt 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 is ON t Push PWR to exit initial set mode D Frequency range and offset direction MAIN T X DUP M MAIN T X DUP T M Auto DUP set ON Auto tone set OFF Auto DUP set ON Auto tone set ON While pushing SET ...

Page 46: ...l 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 desired memory channel Pushing Y Z for 1 sec activates a scan If scan is activated push Y Z again or push CLR A MW to stop it D Using the keypad z Push BAND to select the desired band as the main ban...

Page 47: ...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 wPush the same band s M CALL MW for 1 sec 3 beeps sound indicator and the memory channel number blink eRotate the DIAL to select the memory channel to be pro grammed Memory channels not yet programmed are blank rPush t...

Page 48: ...ed frequency in VFO mode Push VFO LOCK to select VFO mode Set the frequency using the keypad Set other data e g offset frequency duplex direction sub audible tone encoder ON OFF and its frequency if neces sary x Push FUNC then CLR A MW momentarily c Push Y or Z to select the memory channel Direct numeral input cannot be used v Push FUNC then CLR A MW for 1 sec to program 3 beeps may sound and the ...

Page 49: ...s 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 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 call channel c Push FUNC then CLR A MW for 1 sec to transfer the selected memory call cha...

Page 50: ...ct 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 indication blink and shows VFO conditions c Push Y Z to select the target memory channel C1 or C2 blinks when the call channel is selected Scan edge channels can also be selected The keypad cannot be used...

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 into the call channel automatically t Push the same band s MAIN BAND or V MHz SCAN to return to VFO mode NOTE Be careful the contents of cleared memories CANNOT be recalled EXAMPLE Clearing memory chann...

Page 52: ...ntents 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 CALL to select memory mode if de sired x Push FUNC then MONI 1 BANK to select memory bank condition Bank initial blinks c Push Y Z to select the desired bank A to J Only programmed memory bank can be ...

Page 53: ...ly 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 keypad Push BAND to select the desired band left or right as the main band in advance x Push FUNC then MONI 1 BANK indication blinks c Push CLR A MW to set the channel to bank setting stand by condition i...

Page 54: ...e 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 to return to regular mem ory condition y Repeat steps q to t for transferring or erasing an an other banks contents z Select the desired bank contents in the main band Push MR CALL to select memory ...

Page 55: ...me 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 channel number blink To transfer to the VFO select with the DIAL then push the M CALL MW for 1 sec e Push the M CALL MW for 1 sec to transfer the contents z Push MR CALL for 1 sec then push Y Z to select...

Page 56: ...r 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 other data as desired x Push FUNC then CLR A MW momentarily c Select the call channel via Y or Z v Push FUNC then CLR A MW for 1 sec to program 3 beeps sound and the unit returns to VFO mode automatical...

Page 57: ...s 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 skip channels Used for often called channels and for by passing normally busy channels such as repeater frequencies SKIP SKIP M 0 M 4 M 1 M 2 M 3 M 5 M 199 M 6 SCAN RESUME CONDITION p 45 4 resume condit...

Page 58: ...the 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 for bank scan x Push SQLY D MUTE or SQLZ 16KEY L to set the squelch to the point where noise is just muted c Push SCAN 2 T SCAN to start the scan Push Y or Z for 1 sec also starts the scan v Push SET...

Page 59: ...annel 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 CALL MW after programming t To program a frequency for the other pair of scan edges 1b 2b 3b 4b or 5b repeat steps q and r If the same frequency is programmed into a pair of scan edges programmed scan w...

Page 60: ...to 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 a frequency for the other scan edge channels repeat steps z to v MW EXAMPLE Programming 145 800 MHz into scan edge 1b MAIN T X M MAIN T X M MAIN T X M MAIN T X M MAIN T X M MAIN T X M Push Push Push...

Page 61: ...r 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 mode by pushing MR CALL Push Y or Z to select the desired channel to be a skip channel Direct memory channel selection is also available x Push SET B D OFF to enter set mode c Push SET B D OFF or ENT ...

Page 62: ...Scan pauses 15 sec while receiving a signal SCt 10 Scan pauses 10 sec while receiving a signal SCt 5 Scan pauses 5 sec while receiving a signal SCP 2 Scan pauses until the signal disappears and then resumes 2 sec later t Push TONE DTMF to exit set mode 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 c Push SET B D OFF or ENT C T OFF severa...

Page 63: ...tone 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 WATCH While operating on a VFO fre quency priority watch checks for signals on each memory chan nel in sequence The memory skip function is useful to speed up the scan CALL CHANNEL WATCH While operating ...

Page 64: ...dition 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 watching channel s For memory channel watch Push MR CALL then Y or Z to select the de sired memory channel For memory scan watch Push MR CALL then push SCAN 2 to start the memory scan For call channel watc...

Page 65: ...ired 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 t and y to set the desired DTMF tone sequence The S RF indicator shows the digit group The indication in creases every 6 digits i Push TONE DTMF to exit DTMF memory programming condition Return to th...

Page 66: ...revious 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 every 6 digits 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 DTMF EXAMPLE Programming 5428AB453 into DT...

Page 67: ...ry 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 each push of the PTT transmits the previously se lected DTMF code D Transmitting a DTMF memory directly z Push FUNC then LOW 6 DTMF to turn the DTMF memory encoder ON d appears in place of the main ba...

Page 68: ...DTMF 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 power OFF w While pushing SET push PWR for 1 sec to turn power ON and enter initial set mode e Push SET or LOW PRIO several times until dtd appears as shown above r Rotate the left band s DIAL to selec...

Page 69: ...ket 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 the beeps and blinking manually push any key When the beep tones are not stopped manually S continues blinking until PTT is pushed see step o o Push PTT to answer S disappears and cancels the pocket ...

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 interference from adjacent tone frequencies To prevent interference from adjacent tone frequencies using the frequencies as in the following table is recom mended D Calling a waiting station using pocke...

Page 71: ...ONE 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 TSQL or HIGH 4 DTCS to turn the tone squelch or DTCS squelch ON v When a signal with the matched tone is re ceived the squelch opens and the signal can be heard When the received signal includes an u...

Page 72: ...ted 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 decoder DTCS DTCS tone encoder decoder t Push V MHz SCAN to stop the scan z Set the frequency or memory channel to be checked for a tone frequency x Selects the tone type to be scanned Push FUNC then push ...

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 mode Set mode operation 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 t...

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 104 codes are available default 023 MAIN T X DTCS M 67 0 69 3 71 9 74 4 77 0 79 7 82 5 85 4 88 5 91 5 94 8 97 4 100 0 103 5 107 2 110 9 114 8 118 8 123 0 127 3 131 8 136 5 141 3 146 2 151 4 156 7 15...

Page 75: ...on 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 a signal until signal disap pears then resumes 2 sec after the sig nal disappears D D Channel skip setting Sets channel skip setting from ON and OFF for memory skip scan operation This item appears w...

Page 76: ...bands 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 Oscillator frequency from normal n and reverse r By changing local oscillator frequency the transceiver may reject interference or image frequencies such as from other stations spurious or the transceive...

Page 77: ...esired 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 MAIN T X MAIN T X MAIN T X MAIN T X MAIN T X MAIN T X Active band Key touch beep Time out timer Auto repeater Squelch attenuator Microphone sensitivity Sub band mute Auto power off DTMF speed Squelch de...

Page 78: ...side 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 frequencies if necessary OF The auto repeater function is turned OFF r1 Activates for duplex only default r2 Activates for duplex and tone D D Auto power OFF The transceiver can be set to automatica...

Page 79: ...be 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 default L Long squelch delay D D Microphone sensitivity Selects the microphone sensitivity from high H and low L to suits your preference D D Squelch attenuator Turns the squelch attenuator function ON a...

Page 80: ...y 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 5 cps speed 3 300 msec interval 1 6 cps speed 5 500 msec interval 1 0 cps speed D D Sub band mute Turns the sub band function with sub band busy beep capa bility ON and OFF MAIN T X M MAIN T X M MAI...

Page 81: ...On 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 exit set mode z Push BAND to select the desired band left or right as the main band If you want to select FM narrow mode select the de sired frequency band or memory channel on the left band x Set t...

Page 82: ...ile 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 to set ON Push TONE DTMF to exit set mode e Sets the desired stand by condition Selects VFO memory or call channel Scan or priority watch operation can also be selected r When the alert is detected a...

Page 83: ...signment 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 bands can be memorized into F 1 and F 2 keys in dependently Operating frequency Repeater setting offset direction and frequency tone ON OFF and frequency Tone DTCS squelch ON OFF frequency code and po...

Page 84: ...play 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 waiting a few seconds turn power ON again If the problem persists per form the following procedure Partial resetting is also available See left for details IMPORTANT Resetting the transceiver CLEARS al...

Page 85: ...er 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 transceiver s display and the S RF indicators show that data is being transferred to the sub transceiver CLOnE In appears automatically in the sub transceiver s dis play and the S RF indicators show that d...

Page 86: ...ult 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 initial set mode For 1200 bps operation Disconnect the microphone plug from the microphone connector during data transmission otherwise the data signal and voice signal are simultaneously transmitte...

Page 87: ...e 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 modulated signal 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 bp...

Page 88: ...tion 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 is interrupted and the voice signal takes pri ority Read the instructions supplied with your TNC carefully before attempting packet operation with the transceiver Pin r DATA OUT is for 9600 bps operat...

Page 89: ...tc 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 the transmit indi cator lights continuously When transmission is not successful even though the TX indicator lights continuously Increase the TNC output level D Packet operation band selection Both ba...

Page 90: ...audible tone frequency is programmed The frequency lock function is activated Priority watch is paused on the watching frequency The frequency lock function is activated The microphone keypad lock function is activated Priority watch is paused on the watching fre quency Check the connector pins Re connect the power cable observing the proper polarity Replace the fuse if damaged Check the cause the...

Page 91: ...Time 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 squelch to the threshold point Program other memory channels or cancel the memory skip function in the desired channels Cancel the watch Set the timer to OFF Turn the function OFF Reset the CPU p 16 pg...

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 band only Spurious emissions Less than 60 dB Microphone connector 8 pin modular 600 Ω D D RECEIVER Receive system Double conversion superheterodyne Intermediate frequencies Left band 1st 38 85 MHz 2nd...

Page 93: ...t MB 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 Mounts the remote controller on to variety of place in vehicle MB 84 is required for mounting MB 17A MOBILE MOUNTING BRACKET One touch bracket Transceiver main unit easily attached or re moved OPC...

Page 94: ...O 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 p 65 USA version only BANK CHANNEL p 35 MEMORY MODE p 29 VFO mode p 12 INITIAL SET MODE Display dimmer p 57 Display color p 57 Repeater tone frequency p 57 T N Mode selection p 59 4 Weather alert 2 ...

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 squelch frequency p 57 DTCS code p 57 DTCS polarity p 58 Offset frequency p 58 Tuning step p 58 Scan resume timer p 58 Channel skip setting 1 p 58 Narrow setting 2 3 p 59 Mode selection p 59 4 Weather aler...

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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Icom IC-2720, Instruction Manual

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