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Icom IC-2720H Instruction Manual

Other manuals for IC-2720H: Service Manual, Operating Manual
Manual is about: DUAL BAND FM TRANSCEIVER

Summary of IC-2720H

  • Page 1

    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 ma...

  • Page 2: D Features

    I new2001 foreword thank you for purchasing this icom product. The ic-2720h vhf / uhf fm transceiver is designed and built with icom’s su- perior technology and craftsmanship. With proper care, this product should provide you with years of trouble-free opera- tion. We want to take a couple of moment...

  • Page 3

    Rwarning rf exposure! This device emits radio frequency (rf) energy. Extreme caution should be observed when operating this device. If you have any questions regarding rf expo- sure and safety standards please refer to the federal communica- tions commission office of engineering and technology’s re...

  • Page 4

    New2001 iii table of contents supplied accessories 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 remot...

  • Page 5

    New2001 iv 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ■ selecting output power ................................................................ 20 ■ one-touch ptt function ............................................................... 21 ■ audio mute function ....................................................

  • Page 6: Quick Reference Guide

    I quick reference guide new2001 ■ installation d installation methods • single body installation • optional mb-85 combination bracket is necessary to mount the controller to the main unit. (20 cm; 7 7 ⁄ 8 ″ separa- tion cable is supplied with the bracket.) • the supplied mounting bracket (or optiona...

  • Page 7

    Ii quick reference guide new2001 d location select a location which can support the weight of the trans- ceiver and does not interfere with driving. We recommend the locations shown in the diagram below. Never place the transceiver or remote controller where nor- mal operation of the vehicle may be ...

  • Page 8

    Iii quick reference guide new2001 d mb-84 installation the supplied mb-84 remote controller bracket is used for separate installation. 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. W attach ...

  • Page 9

    Iv quick reference guide 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 meth- ods. A 20 cm (7 7 ⁄ 8 ″) remote control cable is supplied for con- nection, and connect the cable before attaching ...

  • Page 10

    V new2001 d separation cable connection a separation cable (3.5 m; 11.5 ft) is supplied with the ic- 2720h. Connect the controller and the main unit using with the sepa- ration cable as follows. Important!— for the usa version a ferrite core is supplied within the separation cable. Connect the cable...

  • Page 11

    Vi quick reference guide new2001 d battery connection ☞ rwarning never remove the fuse holders from the dc power cable. ☞ never connect the transceiver directly to a 24 v battery. ☞ do not use the cigarette lighter socket for power con- nections. (see p. 6 for details) attach a rubber grommet when p...

  • Page 12

    Vii quick reference guide new2001 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 non- radial antenna should be used when using a magnetic mount. • antenna connector the antenna uses a pl-2...

  • Page 13: ■ Your First Contact

    Viii quick reference guide new2001 ■ your first contact 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. 1. Turning on the...

  • Page 14

    Ix quick reference guide new2001 3. Selecting the operating frequency band the ic-2720h has 2 m and 70 cm bands for each left and right band. The operating band can be exchanged between them, and the same bands, v/v and u/u settings are also possible. ➥ push the desired band’s (left or right) [main•...

  • Page 15: ■ Repeater Operation

    X quick reference guide new2001 ■ repeater operation 1. Setting duplex push desired band’s [main•band] to select the main band. Push [dup•moni] once or twice to select minus duplex or plus duplex. • the usa version has an auto repeater function, therefore, setting duplex is not required. 2. Repeater...

  • Page 16

    Xi quick reference guide new2001 ■ 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 op- erating frequency, repeater settings, etc. Any memory channel can be recalled from either left or right band. 1. Set...

  • Page 17

    Xii quick reference guide new2001 using the hm-133 q in vfo mode, set the desired operating frequency, includ- ing offset direction, tone settings, etc. ➥ push [vfo/lock] to select vfo. ➥ push [ ent c(t-off)] first, then enter the desired oper- ating frequency via the keypad. • set other data, such ...

  • Page 18: Panel Description

    ■ front panel— controller qpower switch [pwr] turns power on and off when pushed for 1 sec. Wset•lock switch [set• ] ➥ enters set mode when pushed. (p. 56) ➥ switches the lock function on and off when pushed for 1 sec. (p. 15) eoutput power•priority switch [low•prio] ➥ each push changes the output p...

  • Page 19

    2 1 panel description new2001 1 ymain•band switch [main•band] ➥ push to select the main band. (p. 11) ➥ enters operating band select condition when pushed for 1 sec. (p. 11) uvfo/mhz tuning•scan switch [v/mhz•scan] ➥ selects and toggles vfo mode and 1 mhz (or 10 mhz for some versions) tuning when pu...

  • Page 20: ■ Function Display

    3 1 panel description new2001 ■ function display qmain indicator (p. 11) indicate the main band for transmit and function control. Wtransmit indicator ➥ appears while transmitting. (p. 20) ➥ blinks while transmitting with the one-touch ptt func- tion. (p. 21) eduplex indicators (p. 23) “dup” appears...

  • Page 21

    4 1 panel description new2001 1 tam indicator (p. 64) appears when am mode is selected. Yfrequency readout shows the operating frequency, set mode contents, etc. • frequency decimal point blinks while scanning. (p. 41) • “d” appears in place of the 1st digit while the dtmf memory function is in use....

  • Page 22: ■ Main Unit

    5 1 panel description new2001 ■ main unit qdata socket [data] connects a tnc (terminal node controller), etc. For data communications. • see p. 6 for connection information. Wmicrophone connector [mic] connects the supplied or an optional microphone. Q +8 v dc output (max. 10 ma) w channel up/down e...

  • Page 23

    6 1 panel description new2001 1 yexternal 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. Uexternal speaker jack 2 [sp-2] connects an 8 Ω ...

  • Page 24: ■ Microphone (Hm-133*)

    7 1 panel description new2001 ■ microphone (hm-133*) qvfo/lock switch [vfo/lock] ➥ push to select vfo mode. (p. 12) ➥ push for 1 sec. To switch the lock function on and off. (p. 15) wptt switch ➥ push and hold to transmit; release to receive. ➥ switches between transmitting and receiving while the o...

  • Page 25: ■ Microphone Keypad

    8 1 panel description new2001 1 ■ microphone keypad key function secondary function ( +key) other functions switches between opening and closing the squelch. (p. 16) starts and stops scanning. (p. 41) starts and stops priority watch. (p. 47) selects high output power. (p. 20) selects mid. Output pow...

  • Page 26

    9 1 panel description new2001 ➥ cancels frequency entry. (p. 13) ➥ cancels the scan or priority watch. (pgs. 41, 47) ➥ exit set mode. (p. 56) ➥ enters set mode (p. 56) ➥ advances the set mode selection order after entering set mode. (p. 56) ➥ sets the keypad for numeral input. (p. 13) ➥ reverses the...

  • Page 27: ■ Optional Microphones

    10 1 panel description new2001 1 ■ optional microphones (hm-118n/tn/tan) qptt switch ➥ push and hold to transmit; release to receive. Wup/down switches [up]/[dn] ➥ push either switch to change operating frequency, memory channel, set mode setting, etc. (pgs. 13, 29, 56) ➥ push either switch for 1 se...

  • Page 28: Setting A Frequency

    11 setting a frequency new2001 2 ■ preparation d turning power on/off ➥ 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 desi...

  • Page 29

    12 2 setting a frequency new2001 2 z push [band] to select main band. X push [func], the push [ bank 1(moni)] to se- lect frequency band selecting condition. • the frequency band initial is displayed. C push [y]/[z] to select the desired frequency band. V push [ clr a(mw)] to exit the condition, and...

  • Page 30: ■ Using The Tuning Dial

    13 2 setting a frequency new2001 ■ using the tuning dial q rotate the desired band’s [dial] to set the frequency. • if vfo mode is not selected, push the same band’s [v/mhz•scan] to select vfo mode. • the frequency changes in the selected tuning steps. (p. 14) w to change the frequency in 1 mhz (10 ...

  • Page 31: ■ Tuning Step Selection

    14 2 setting a frequency new2001 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...

  • Page 32: ■ Lock Functions

    15 2 setting a frequency new2001 ■ 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 this function locks [dial] and switches electronically and can be used together with the ...

  • Page 33: Basic Operation

    16 3 basic operation 2 3 ■ receiving 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 le...

  • Page 34: ■ Squelch Attenuator

    17 3 basic operation new2001 ■ squelch attenuator the transceiver has an rf attenuator related to the squelch level setting. Approx. 10 db attenuation is obtained at maxi- mum setting. The squelch attenuator allows you to set a minimum signal level needed to open the squelch. The attenuator function...

  • Page 35

    ■ v/v, u/u simultaneous receive (para-watch) 18 3 basic operation new2001 3 the ic-2720h can simultaneously receive two signals on the same band, such as 144 mhz band, using the para-watch function. Q push either the left or right band’s [main•band] for 1 sec. To select the frequency band selecting ...

  • Page 36

    The sub band mute function automatically cuts out sub band audio signals when both main and sub band signals are re- ceived simultaneously. While operating on the main band, a beep sounds to inform you that a signal was received on the sub band. Q while pushing [set• ], push [pwr] for 1 sec. To ente...

  • Page 37: ■ Transmitting

    20 3 basic operation new2001 3 ■ transmitting ☞ note: to prevent interference, listen on the channel be- fore 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 desi...

  • Page 38: ■ One-Touch Ptt Function

    21 3 basic operation new2001 ■ one-touch ptt 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. To prevent accidental, continuous transmissions with this func...

  • Page 39: Repeater Operation

    22 4 repeater operation 3 4 ■ general repeaters allow you to extend the operational range of your radio because a repeater has much higher output power than the typical transceiver. Normally, a repeater has indipendent frequencies for each re- ceiver and transmitter. A subaudible tone may also be re...

  • Page 40: ■ Accessing A Repeater

    ■ 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 du- plex or plus duplex. • “dup–” or “dup” appears to indicate the transmit frequency for minus shift or plus shift, respectively. • when ...

  • Page 41

    24 4 repeater operation new2001 4 z set the receive frequency (repeater output fre- quency) on the main band. (pgs. 11–13) x push [ dup – 7(tone)] to select minus duplex; push [ dup + 8(tsqls)] to select plus duplex. C push [func] then [ dup – 7(tone)] to turn on the subaudible tone encoder accordin...

  • Page 42: ■ Subaudible Tones

    ■ subaudible tones (encoder function) 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. W push [set• ] to enter set mode. E push [set• ] or [dup•moni] several times until “t” and “rt” appear; or until “t sql” and...

  • Page 43

    26 4 repeater operation new2001 4 d dtmf tones ➥ push [dtmf-s], then push the keys of the de- sired dtmf digits. • the function indicator lights green. • 0–9, a–d, m(e) and #(f) are available. • when “d” is displayed in place of the 100 mhz digit, cancel the dtmf memory encoder in advance. (p. 50) •...

  • Page 44: ■ Offset Frequency

    27 4 repeater operation new2001 ■ offset frequency when communicating through a repeater, the transmit fre- quency is shifted from the receive frequency by an amount determined by the offset frequency. Independent offset frequencies can be set for each operating frequency. Q push [main•band] to sele...

  • Page 45: ■ Auto Repeater

    28 4 repeater operation new2001 4 ■ auto repeater (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 r...

  • Page 46: Memory Operation

    29 memory operation new2001 5 ■ 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),...

  • Page 47

    30 5 memory operation new2001 5 ■ programming a memory channel [example]: programming 145.870 mhz into memory channel 20 (blank channel) via the controller. 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 rotate for setting frequency, etc. Push for 1 sec. Rotate push for 1 sec...

  • Page 48

    31 5 memory operation new2001 d programming a memory channel via the microphone [example]: programming 145.870 mhz into memory channel 20 (blank channel) via the microphone. 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 beep “ beep “ beep beep beep “ “ “ “ “ push , push then...

  • Page 49

    32 5 memory operation new2001 5 ■ transferring memory contents this function transfers a memory channel’s contents to vfo (or another memory/call channel). This is useful when search- ing for signals around a memory channel frequency and for recalling the offset frequency, subaudible tone frequency ...

  • Page 50

    5 memory operation 33 new2001 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 ban...

  • Page 51: ■ Memory Clearing

    5 memory operation 34 new2001 5 ■ memory clearing contents of programmed memories can be cleared (blanked), if desired. 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. • “!” indicator and the memory channel number blink. E rot...

  • Page 52: ■ Memory Bank Selection

    35 new2001 5 memory operation ■ memory bank selection the ic-2720h has a total of 10 banks (a to j) . Regular mem- ory channels, 000 to 199, are assigned into the desired bank for easy memory management. Q push the desired band’s [m/call•mw] several times to select memory mode, if desired. W push th...

  • Page 53: ■ Memory Bank Setting

    36 5 memory operation new2001 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. E push the [main•ban...

  • Page 54

    37 5 memory operation new2001 ■ 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 pro- grammed. Q select the desired bank contents to be tra...

  • Page 55: Call Channel Operation

    38 6 call channel operation 5 6 ■ call channel selection call channel is pre-programmed memory channel that can be accessed by simply pushing call channel button. ➥ push [m/call•mw] sev- eral times to select the call channel mode then rotate the same band’s [dial] to select the de- sired call channe...

  • Page 56

    39 6 call channel operation new2001 ■ programming a call channel operating frequency, duplex information, subaudible tone in- formation (tone encoder or tone squelch on/off and its fre- quency) can be programmed into the call channel. Q set the desired frequency in vfo mode. ➥ push the desired band’...

  • Page 57: Scan Operation

    40 7 scan operation 6 7 ■ scan types scanning searches for signals automatically and makes it easier to locate new stations for contact or listening purposes. There are 3 scan types and 4 resume conditions to suit your operating needs. Band scan (p. 41) repeatedly scans all frequen- cies over the en...

  • Page 58: ■ Scan Start/stop

    41 7 scan operation new2001 ■ 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...

  • Page 59: ■ Scan Edges Programming

    42 7 scan operation new2001 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. Q set the edge frequency of the desired frequency range in vfo mode: ➥ set the frequency using the...

  • Page 60

    43 7 scan operation new2001 d programming scan edges via microphone 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, 4...

  • Page 61: ■ Skip Channel Setting

    44 7 scan operation new2001 7 ■ skip channel setting the memory skip function speeds up scanning by checking only those memory channels not set as skip channels. Set skip channels as follows. Q select a memory channel in the desired band: ➥ push the desired band’s [m/call•mw] to select mem- ory mode...

  • Page 62: ■ Scan Resume Condition

    45 7 scan operation new2001 ■ scan resume condition the scan resume condition can be selected as timer or pause scan. The selected resume condition is also used for priority watch. (p. 47) q push [main•band] to select the desired band (left or right) as the main band. W push [set• ] to enter set mod...

  • Page 63: Priority Watch

    46 8 priority watch 7 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 trans- mit on the vfo frequency while the priority watch operates. The watch re...

  • Page 64

    47 8 priority watch new2001 ■ 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 b...

  • Page 65: Dtmf Memory Encoder

    48 9 dtmf memory encoder 8 9 ■ programming a dtmf code dtmf tones are used for autopatching, controlling other equipment, etc. The transceiver has 14 dtmf memory chan- nels (d0–dd) for storage of often-used dtmf codes of up to 24 digits. Q push [tone•dtmf] for 1 sec. To turn the dtmf encoder on. • s...

  • Page 66

    49 9 dtmf memory encoder new2001 d programming a dtmf code— via microphone z push [func] then [ low 6(dtmf)] to turn the dtmf encoder on. • “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. C push [y] or [z] to select the de...

  • Page 67

    50 9 dtmf memory encoder new2001 9 ■ transmitting a dtmf code d automatic transmission (dtmf memory) q push [tone•dtmf] for 1 sec. To turn the dtmf memory encoder on. • “d” appears in place of the main band’s 100 mhz digit. W push [set• ] to enter dtmf memory programming con- dition. E rotate main b...

  • Page 68: ■ Dtmf Speed

    51 9 dtmf memory encoder new2001 d manual transmission z deactivate the dtmf memory encoder by pushing [func] then [ set b(d-off)]. X push [dtmf-s] to turn the dtmf direct selec- tion on. • the function indicator (microphone) lights green. C push one of “0” to “9” and “a” to “f” keys mo- mentarily, ...

  • Page 69: ■ Pocket Beep Operation

    52 10 pocket beep and tone squelch 9 10 ■ 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. D waiting for a call from a specific station q set the operating frequen...

  • Page 70

    53 10 pocket beep and tone squelch new2001 z set the operating frequency. X program the ctcss tone frequency or dtcs 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 ...

  • Page 71

    54 10 pocket beep and tone squelch new2001 10 ■ tone/dtcs squelch operation the tone or dtcs squelch opens only when receiving a sig- nal 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 dtc...

  • Page 72: ■ Tone Scan

    55 10 pocket beep and tone squelch new2001 ■ 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 f...

  • Page 73: Other Functions

    56 11 other functions 10 11 main t x m main t x m main t x t m main t x m main t x m main t x m main t x t sql m main t x m main t x m main t x m main t x dup m main t x dtcs m main t x dtcs m main t x m • mode selection** • display dimmer • display color • repeater tone frequency • narrow setting ‡...

  • Page 74

    57 11 other functions new2001 d d display dimmer adjust to suit lighting conditions. The levels 1 (dark) to 4 (bright: default) are available. D d display color the display color can be set to amber (default) or green. D d repeater tone sets subaudible tone frequency (encoder only) for repeater oper...

  • Page 75

    58 11 other functions new2001 11 d d dtcs polarity sets dtcs polarities for transmission and reception from “nn,” “nr,” “rn” and “rr.” (default: nn) d d offset frequency sets the duplex offset frequency within 0 to 20 mhz range. During duplex (repeater) operation, transmit frequency shifts the set f...

  • Page 76

    59 11 other functions new2001 d d wide/narrow setting (left band only) 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...

  • Page 77: ■ Initial Set Mode

    60 11 other functions new2001 11 ■ initial set mode the initial set mode is accessed at power on and al- lows you to set seldom-changed settings. In this way, you can “customize” transceiver operations to suit your preference and operating style. • initial set mode items d d entering initial set mod...

  • Page 78

    61 11 other functions new2001 d d key-touch beep the key-touch beep can be turned off for silent operation. (default: on) d d time-out timer to prevent accidental prolonged transmission, etc., the trans- ceiver has a time-out timer. This function cuts a transmission off after 1–30 min. Of continuous...

  • Page 79

    62 11 other functions new2001 11 d d cooling fan control 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. D d data transmission speed selects the data transmission sp...

  • Page 80

    63 11 other functions new2001 d d active band 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 t...

  • Page 81: ■ Am/fm Narrow Mode [

    64 11 other functions new2001 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 ver- si...

  • Page 82

    65 11 other functions new2001 ■ weather channel operation (usa version only) d d weather channel selection q push the desired band’s [m/call•mw] several times to select weather channel group. W rotate the same band’s [dial] to select the desired weather channel. E push the [m/call•mw] to select memo...

  • Page 83: ■ Microphone Keys

    66 11 other functions new2001 11 ■ microphone keys 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...

  • Page 84: ■ Partial Reset

    67 11 other functions new2001 ■ partial reset if you want to initialize the operating conditions (vfo fre- quency, 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 ...

  • Page 85: ■ Data Cloning

    68 11 other functions new2001 11 ■ data cloning cloning allows you to quickly and easily transfer the pro- grammed 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 ...

  • Page 86: ■ Packet Operation

    69 11 other functions new2001 d cloning using a personal computer data can be cloned to and from a personal computer (mi- crosoft ® windows ® 98/2000/me/xp) using the optional cs- 2720 cloning software and the optional cloning cable opc-478u (usb type) or opc-478 (rs-232c type). Consult the cs-2720 ...

  • Page 87

    70 11 other functions new2001 11 d 1200 bps packet operation q connect the transceiver and a tnc as illustrated below. W set the tnc for transmit. E set transmit delay on the tnc to 30–50. R adjust the tnc frequency deviation if necessary. • when using a deviation meter: adjust the output of the tnc...

  • Page 88

    71 11 other functions new2001 d 9600 bps high speed packet operation the transceiver supports 2 modes of 9600 bps packet opera- tion: g3ruh and gmsk. Q connect the transceiver and a tnc as illustrated below. W g3ruh mode can handle 16 kinds of modulated wave forms in order to maintain a communicatio...

  • Page 89

    72 11 other functions new2001 11 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 in- ternal limiter circuitry to automatically maintain band width. Never apply data levels from the...

  • Page 90: Maintenance

    73 maintenance new2001 12 problem possible cause solution ref. ■ troubleshooting if your transceiver seems to be malfunctioning, please check the following points before sending it to a service center. Does not turn on. No sound comes from the speaker. Sensitivity is low and only strong signals are ...

  • Page 91: ■ Fuse Replacement

    74 12 maintenance new2001 12 problem possible cause solution ref. Some memory channels cannot be selected via the tuning dial. Scan does not operate. Transmission is automati- cally cut off. Transmission continues even when the ptt is re- leased. The function display shows erroneous information. • t...

  • Page 92: Specifications And Options

    75 specifications and options new2001 13 ■ specifications d d general • frequency coverage : (unit: mhz) * 1 guaranteed: 144–148 mhz range only.; * 2 guaranteed: 440–450 mhz range for the usa, 430–440 mhz for the general version; * 3 not guaranteed; * 4 824.010 to 848.990 and 869.010 to 893.990 mhz ...

  • Page 93: ■ Options

    76 13 specifications and options new2001 13 • squelch sensitivity † (threshold) : less than 0.13 µv • selectivity † (typical) : wide more than 12 khz/6 db less than 30 khz/60 db narrow (usa only) more than 6 khz/6 db less than 20 khz/60 db • spurious and image rejection † : more than 60 db • af outp...

  • Page 94: Mode Arrangement

    77 mode arrangement new2001 14 main t x m main t x m main t x m main t x m main t x m main t x dup m main t x main t x m main t x m main t x m main t x m main t x m main t x m main t x m main t x m main t x m main t x t m main t x m main t x m main t x m m main band scan v/mhz scan v/mhz scan v/mhz ...

  • Page 95

    78 14 mode arrangement new2001 14 main t x m main t x m main t x m main t x m main t x m main t x m main t x dup m main t x m main t x m main t x m main t x m main t x m main t x m main t x m main t x m main t x m main t x m main t x m main t x t m main t x t sql m main t x dtcs m main t x dtcs m ma...

  • 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).