IcomメーカーIC-208Hの使用説明書/サービス説明書
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INSTRUCTION MANUAL i208H VHF/UHF 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.
i FOREWORD Thank you for purchasing this Icom product. The IC-208H VHF / UHF FM TRANSCEIVER is designed and built with Icom’s state of the art technology and craftsmanship. With proper care, this product should provide you with years of trouble-free operation.
R W ARNING 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 stan.
iii T ABLE OF CONTENTS SUPPLIED ACCESSORIES q DC power cable (3 m) ………………………………………1 w Mobile mounting bracket …………………………………1 e Microphone (HM-13.
iv 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ■ One-touch PTT function ............................................................... 18 ■ Audio mute function ..................................................................... 18 4 REPEA TER OPERA TION .
I QUICK REFERENCE GUIDE ■ Installation D Installation methods • Single body installation • The supplied mounting bracket (or optional MB-17A) can be used for the main unit installation. • Remote installation • The supplied OPC-600/R SEP ARA TION CABLE can be used for remote installation.
II QUICK REFERENCE GUIDE 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 hindered or where it could cause bodily injury .
III QUICK REFERENCE GUIDE D Microphone connection Connect the supplied microphone as illustrated below . D Separation cable connection Using the supplied separation cable (3.5 m; 1 1.5 ft) or the op- tional separation cable (7 m; 23 ft) the controller can be sep- arated from the main unit, doubling as a remote controller .
IV QUICK REFERENCE GUIDE D Optional MB-58 installation The optional MB-58 REMOTE CONTROLLER BRACKET is avail- able for separate installation. q Drill 2 or 4 holes where the bracket is to be installed. • Approx. 4 mm ( 1 ⁄ 8 ″ ) when using nuts; approx.
V D Battery connection ☞ R W ARNING NEVER remove the fuse holders from the DC power cable. ☞ NEVER connect the transceiver directly to a 24 V battery .
VI QUICK REFERENCE GUIDE D Antenna installation • Antenna location T o 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.
VII QUICK REFERENCE GUIDE ■ Y our fi rst contact Now that you have your IC-208H 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.
VIII QUICK REFERENCE GUIDE 3. T une the frequency The tuning dial will allow you to dial in the frequency you want to operate. Pages 12 and 13 will instruct you on how to set the tuning speed. Using the HM-133 Y ou can directly enter the frequency with the HM-133 keypad for the main band.
IX QUICK REFERENCE GUIDE ■ Repeater operation 1. Setting duplex Push [BAND] to select the frequency band. Push [LOW•DUP] for 1 sec. once or twice to select minus du- plex or plus duplex. • The USA version has an auto repeater function, therefore, setting duplex is not required.
X QUICK REFERENCE GUIDE Quick reference guide ■ Programming memory channels The IC-208H has a total of 512 memory channels (including 10 scan edges and 2 call channels) for storing often used op - erating frequency , repeater settings, etc.
■ Front panel — controller q SET • LOCK SWITCH [SET • LOCK] ➥ Enters set mode when pushed. (p. 56) ➥ Switches the lock function ON and OFF when pushed for 1 sec. (p. 14) w TUNING DIAL [DIAL] Selects the operating frequency (p. 12), memory channel (p.
2 1 P ANEL DESCRIPTION 1 y SQUELCH CONTROL [SQL] V aries the squelch level. (p. 15) • The RF attenuator activates and increases the attenuation when rotated clockwise to the center position and further . (p. 16) u MONITOR • DTMF SWITCH [MONI • DTMF] ➥ Push to switch the monitor function ON and OFF .
3 1 P ANEL DESCRIPTION ■ Function display q TRANSMIT INDICA TOR ➥ Appears while transmitting. (p. 17) ➥ Blinks while transmitting with the one-touch PTT func- tion. (p. 18) w DUPLEX INDICA TORS (p. 20) “DUP” appears when plus duplex, “DUP –” appears when minus duplex (repeater) operation is selected.
4 1 P ANEL DESCRIPTION 1 r NARROW MODE INDICA TOR (p. 65) Appears when the FM/AM narrow mode is selected. Narrow mode is available with USA version only . t AM INDICA TOR (p. 65) Appears when AM mode is selected. y SQUELCH A TTENUA TOR INDICA TOR (p. 16) Appears when the squelch attenuator function is activated.
5 1 P ANEL DESCRIPTION ■ Rear Panel q DA T A SOCKET [DA T A] Connects a TNC (T erminal Node Controller), etc. for data communications. • See p. 6 for connection information. w EXTERNAL SPEAKER JACK [SP] Connects an 8 Ω speaker . • Audio output power is more than 2.
6 1 P ANEL DESCRIPTION 1 D DA T A JACK PIN ASSIGNMENT q DA T A IN Input terminal for data transmit. See p. 63 for details on how to toggle data speed between 1200 (AFSK) and 9600 bps (G3RUH, GMSK). w GND Common ground for DA T A IN, DA T A OUT and AF OUT .
7 1 P ANEL DESCRIPTION ■ Microphone (HM-133*) q VFO/LOCK SWITCH [VFO/LOCK] ➥ Push to select VFO mode. (p. 1 1) ➥ Push for 1 sec. to switch the lock function ON and OFF . (p. 14) w PTT SWITCH ➥ Push and hold to transmit; release to receive. ➥ Switches between transmitting and receiving while the one-touch PTT function is in use.
8 1 P ANEL DESCRIPTION 1 ■ Microphone keypad KEY FUNCTION SECONDAR Y FUNCTION ( +key) OTHER FUNCTIONS Switches between opening and closing the squelch. (p. 15) Starts and stops scanning. (p. 41) Starts and stops priority watch. (p. 47) Selects high output power .
9 1 P ANEL DESCRIPTION ➥ Cancels frequency entry . (p. 12) ➥ 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.
10 1 P ANEL DESCRIPTION 1 ■ Optional Microphones (HM-1 18N/TN/T AN) q PTT SWITCH Push and hold to transmit; release to receive. w UP/DOWN SWITCHES [UP]/[DN] ➥ Push either switch to change operating frequency , memory channel, set mode setting, etc.
11 SETTING A FREQUENCY 2 ■ Preparation D T urning power ON/OFF ➥ Push [PWR] for 1 sec. to turn power ON and OFF . D Operating frequency band selection The IC-208H has 2 m and 70 cm bands for transmission and reception.
12 2 SETTING A FREQUENCY 2 ■ Using the tuning dial q Rotate [DIAL] to set the frequency . • If VFO mode is not selected, push [V/MHz•SCAN] to select VFO mode. • The frequency changes in the selected tuning steps. (p. 13) w T o change the frequency in 1 MHz (10 MHz for some versions) steps, push [V/MHz•SCAN], then rotate [DIAL].
13 2 SETTING A FREQUENCY ■ T uning step selection [ T uning steps are the minimum frequency change increments when you rotate [DIAL] or push [ Y ]/[ Z ] on the microphone. Independent tuning step for each frequency bands can be set for individual tuning convenience.
14 2 SETTING A FREQUENCY 2 ■ Lock functions T o 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 microphone lock function.
15 BASIC OPERA TION 3 ■ Receiving q Set the audio level. ➥ Push [MONI•DTMF] to open the squelch. ➥ Rotate [VOL] to adjust the audio level. ➥ Push [MONI•DTMF] to close the squelch. w Set the squelch level. ➥ Rotate [SQL] fully counterclockwise in advance, then ro- tate [SQL] clockwise until the noise just disappears.
16 3 BASIC OPERA TION 3 ■ 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.
17 3 BASIC OPERA TION ■ T ransmitting ☞ NOTE: T o prevent interference, listen on the channel be- fore transmitting by pushing [MONI•DTMF] on the front panel or [ MONI 1(BANK)] on the microphone. q Select the frequency band. (p. 1 1) w Set the operating frequency .
■ 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. T o prevent accidental, continuous transmission with this func- tion, the transceiver has a time-out timer .
19 REPEA TER OPERA TION 4 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 independent frequencies for each receiver and transmitter .
20 4 REPEA TER OPERA TION 4 ■ Accessing a repeater q Set the receive frequency (repeater output frequency). (pgs. 1 1, 12) w Push [LOW•DUP] for 1 sec. one or two times, to select minus duplex or plus duplex. • “DUP–” or “DUP” appears to indicate the transmit frequency for minus shift or plus shift, respectively .
21 4 REPEA TER OPERA TION z Set the receive frequency (repeater output fre- quency). (pgs. 1 1, 12) x Push [ DUP – 7(TONE)] to select minus duplex; push [ DUP + 8(TSQL S )] to select plus duplex. c Push [FUNC] then [ DUP – 7(TONE)] to turn ON the subaudible tone encoder according to re- peater requirements.
22 4 REPEA TER OPERA TION 4 ■ Subaudible tones [ (Encoder function) D Subaudible tones q Select the frequency band, mode/channel you wish to set the subaudible tones, such as VFO mode or memory/call channel.
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.
24 4 REPEA TER OPERA TION 4 ■ 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 .
■ 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 inactivate them when outside of the range.
26 5 MEMOR Y OPERA TION 4 5 ■ General description The transceiver has 512 memory channels including 10 scan edge memory channels (5 pairs), and 2 call channels. Each of these channels can be individually programmed with operat- ing frequency (pgs. 1 1, 12), duplex direction (p.
27 5 MEMORY OPERA TION ■ Programming a memory channel [EXAMPLE]: Programming 145.870 MHz into memory channel 20 (blank channel) via the controller . Push Rotate for setting frequency , etc.
28 5 MEMORY OPERA TION 5 D Programming a memory channel via the microphone [EXAMPLE]: Programming 145.870 MHz into memory channel 20 (blank channel) via the microphone. Push 10 times Beep “ Beep “ Beep Beep Beep “ “ “ “ “ Push Push then Push then for 1 sec.
29 5 MEMORY OPERA TION ■ Copying memory contents This function copies a memory channel’s contents to VFO (or another memory/call channel). This is useful when searching for signals around a memory channel frequency and for re- calling the offset frequency , subaudible tone frequency etc.
30 5 MEMORY OPERA TION 5 D Memory/call ➪ memory/call q Select the memory/call channel to be transferred. ➥ Push [M/CALL•PRIO] several times to select memory mode or call channel, then rotate [DIAL] or push [BAND] to select the desired memory or call channel respec- tively .
31 5 MEMORY OPERA TION ■ Programming channel names Each memory channel and the call channel can be pro - grammed with an alphanumeric channel name for easy recognition and can be indicated independently by channel. Names can be a maximum of 6 characters— see the table below for available characters.
32 5 MEMORY OPERA TION 5 Channel names can also be programmed via the mi- crophone. z Push [FUNC] then [ CLR A(MW)] momentarily . •“ ! ” and memory channel number blink. x Push [ Y ]/[ Z ] to select the memory/call channel to be as- signed memory names.
5 MEMORY OPERA TION 33 D D T o indicate the channel name [ The channel name indication can be set for independent memory channels. q Push [M/CALL•PRIO] to select the memory mode. w Rotate [DIAL] to select the desired memory channel to be indicated the channel name.
5 MEMORY OPERA TION 34 5 ■ Memory clearing Contents of programmed memories can be cleared (blanked), if desired. q Push [V/MHz•SCAN] to select VFO mode. w Push [S.MW•MW] momentarily . •“ ! ” indicator and the memory channel number blink. e Rotate [DIAL] to select the memory channel to be cleared.
35 5 MEMORY OPERA TION ■ Memory bank selection The IC-208H has a total of 10 banks (A to J) . Regular memory channels, 1 to 500, are assigned into the desired bank for easy memory management. q Push [M/CALL•PRIO] several times to select memory mode, if desired.
36 5 MEMORY OPERA TION 5 ■ Memory bank setting [ q Push [M/CALL•PRIO] several times to select memory mode, then select the desired memory channel via [DIAL]. w Push [SET•LOCK] to enter set mode. e Push [SET•LOCK] or [S.MW•MW] several times until “BAK” appears.
37 5 MEMORY OPERA TION ■ T ransferring bank contents [ Contents of programmed memory banks can be cleared or transferred to another bank. INFORMA TION: Even if the memory bank contents are cleared, the memory channel contents still remain pro- grammed.
38 6 CALL CHANNEL OPERA TION 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•PRIO] several times to select the call chan- nel mode then push [BAND] to select the desired call channel.
39 6 CALL CHANNEL OPERA TION ■ 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.
40 7 SCAN OPERA TION 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 7 SCAN OPERA TION ■ Scan start/stop D Preparation Scan resume condition (p. 45); program the scan edges (pgs. 42, 43); program 2 or more memory channels (pgs. 27, 28); set skip settings (p. 44), if desired. D Operation q Select VFO mode for full/programmed scan with [V/MHz•SCAN]; or memory mode for memory scan with [M/CALL•PRIO].
42 7 SCAN OPERA TION 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 [DIAL].
43 7 SCAN OPERA TION 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, 4A or 5A.
44 7 SCAN OPERA TION 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: ➥ Push [M/CALL•PRIO] to select memory mode.
45 7 SCAN OPERA TION ■ 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 [SET•LOCK] to enter set mode. w Push [SET•LOCK] or [S.
46 8 PRIORITY W A TCH 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. Y ou can also trans- mit on the VFO frequency while the priority watch operates.
47 8 PRIORITY W A TCH ■ Priority watch operation q Select VFO mode; then, set an operating frequency . w Set the watching channel(s). For memory channel watch: Select the desired memory channel. For memory scan watch: Select memory mode; then, push [V/MHz•SCAN] for 1 sec.
48 9 DTMF MEMOR Y ENCODER 8 9 ■ Programming a DTMF code DTMF tones are used for autopatching, controlling other equipment, etc. The transceiver has 16 DTMF memory chan- nels (D0–DF) for storage of often-used DTMF codes of up to 24 digits. q Push [MONI•DTMF] for 1 sec.
49 9 DTMF MEMORY ENCODER 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 100 MHz digit. x Push [ SET B(D-OFF)] to enter the DTMF memory programming condition. c Push [ Y ] or [ Z ] to select the desired DTMF memory channel.
50 9 DTMF MEMORY ENCODER 9 ■ T ransmitting a DTMF code D Automatic transmission (DTMF memory) q Push [MONI•DTMF] for 1 sec. to turn the DTMF memory encoder ON. • “d” appears in place of 100 MHz digit. w Push [SET•LOCK] to enter DTMF memory programming condition.
51 9 DTMF MEMORY ENCODER 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.
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 W aiting for a call from a speci fi c station q Set the operating frequency .
53 10 POCKET BEEP AND TONE SQUELCH 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.
54 10 POCKET BEEP AND TONE SQUELCH 10 ■ T one/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 . w Program the CTCSS tone frequency or DTCS code in set mode.
55 10 POCKET BEEP AND TONE SQUELCH ■ T one scan By monitoring a signal that is being operated with pocket beep, tone or DTCS squelch function, you can determine the tone frequency or DTCS code necessary to open a squelch. q Set the desired operating frequency or memory channel to be checked for a tone frequency or code.
56 11 OTHER FUNCTIONS 10 11 ■ Set mode • Set mode operation q Push [SET•LOCK] to enter the set mode. w Push [SET•LOCK] or [S.MW•MW] to select the desired item. e Rotate [DIAL] to select the condition or value. r Push [MONI•DTMF] to exit set mode.
57 11 OTHER FUNCTIONS D D Display dimmer Adjust to suit lighting conditions. The levels 1 (dark) to 8 (bright: default) are available. D D Display color The display color can be set to amber (default), yellow or green. D D Mic lock function Sets the supplied HM-133’s (optional for some versions) key lock function from ON and OFF (default).
58 11 OTHER FUNCTIONS 11 D D DTCS code Sets DTCS code (both encoder and decoder) for DTCS squelch operation. T otal of 104 codes are available. (default: 023) D D DTCS polarity Sets DTCS polarities for transmission and reception from “NN,” “NR,” “RN” and “RR.
59 11 OTHER FUNCTIONS 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 : P ause on a signal until signal disap- pears, then resumes 2 sec.
60 11 OTHER FUNCTIONS 11 D D Program scan skip setting Sets the program scan skip setting from ON and OFF for VFO scan operation, such as programmed scan. This item appears when set mode is accessed from VFO mode only . D D Weather alert function T urns weather alert function ON and OFF .
61 11 OTHER FUNCTIONS ■ 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.
62 11 OTHER FUNCTIONS 11 D D Key-touch beep The key-touch beep can be turned OFF for silent operation. D D Time-out timer T o prevent accidental prolonged transmission, etc., the trans- ceiver has a time-out timer . This function cuts a transmission OFF after 1–30 min.
63 11 OTHER FUNCTIONS D D Cooling fan control Selects the cooling fan control condition from Auto and ON. • Auto (A T) : The fan rotates during transmit and for 2 min. after transmission, or when the internal tem- perature of the transceiver exceeds the pre- set value until the temperature drops.
64 11 OTHER FUNCTIONS 11 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 . • Single (SI) : The operating frequency can be selected within the current band.
65 11 OTHER FUNCTIONS ■ AM/FM narrow mode The IC-208H has AM mode reception and FM narrow mode is available. T ypically , AM mode is used for the air band (1 18–135.995 MHz). q Select the desired frequency band in VFO mode, or the de- sired memory channel.
66 11 OTHER FUNCTIONS 11 ■ W eather channel operation (USA version only) D D Weather channel selection q Push [M/CALL•PRIO] several times to select weather channel group. w Rotate [DIAL] to select the desired weather channel. e Push [M/CALL•PRIO] to select memory mode, or push [V/MHz•SCAN] to select VFO mode.
67 11 OTHER FUNCTIONS ■ 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 transceiver ’s front panel.
68 11 OTHER FUNCTIONS 11 ■ Partial reset If you want to initialize the operating conditions (VFO fre - quency , VFO settings, set mode contents) without clearing the memory contents. ➥ While pushing [V/MHz•SCAN] and [SET•LOCK], push [PWR] for 1 sec.
69 11 OTHER FUNCTIONS ■ 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-208 CLONING SOFTWARE .
70 11 OTHER FUNCTIONS 11 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-208 CLONING SOFTWARE and the optional cloning cable OPC-478U (USB type) or OPC-478 (RS-232C type).
71 11 OTHER FUNCTIONS ■ Packet operation D Data speed For packet operation, the transceiver can be set to one of two data speeds: 1200 bps or 9600 bps. q While pushing [SET•LOCK], push [PWR] for 1 sec. to enter initial set mode. w Push [SET•LOCK] or [S.
72 11 OTHER FUNCTIONS 11 • Read the instructions supplied with your TNC carefully before attempting packet operation with the transceiver . • Pin t AF OUT is for 1200 bps operation only . This pin cannot be used for 9600 bps operation. • Over modulation may degrade signal quality .
73 11 OTHER FUNCTIONS 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 communication link.
74 11 OTHER FUNCTIONS 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.
75 MAINTENANCE 12 PROBLEM POSSIBLE CAUSE SOLUTION REF . ■ T roubleshooting 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 audible.
76 12 MAINTENANCE 12 ■ Fuse replacement If the fuse blows or the transceiver stops functioning, find the source of the problem if possible, and replace the damaged fuse with a new , rated one (FGB 20 A) as shown at right. 20 A fuse PROBLEM POSSIBLE CAUSE SOLUTION REF .
77 SPECIFICA TIONS AND OPTIONS 13 ■ Speci fi cations D D GENERAL • Frequency coverage : USA Rx 1 18.000–173.995 MHz* 1 , 230.000–549.995 MHz* 2 , 810.000–999.990 MHz* 3 Tx 144–148 MHz, 440–450 MHz Australia, Asia Rx 1 18.000–173.995 MHz* 1 , 230.
78 13 SPECIFICA TIONS AND OPTIONS 13 ■ Options HM-133 REMOTE - CONTROL MICROPHONE Wired remote control microphone with key backlight. Same as that supplied with the transceiver . HM-1 18T AN/TN DTMF MICROPHONE HM-1 18N HAND MICROPHONE HS-62 FLEXIBLE MOBILE MICROPHONE + HS-15SB SWITCH BOX + OPC-589 ADAPTOR CABLE For all-round mobile operation.
79 MODE ARRANGEMENT 14 Key-touch beep (p. 62) Time-out timer (p. 62) DTMF speed (p. 64) Narrow transmission (p. 64) SET MODE DTMF MEMORY CLONE MODE CALL CHANNEL (p. 38) WEATHER CHANNEL (p. 66) (USA version only) BANK CHANNEL MEMORY MODE (p. 26) VFO mode (p.
80 14 MODE ARRANGEMENT 14 Auto repeater (p. 62) (USA version only) Auto power off (p. 62) Cooling fan (p. 63) Data speed (p. 63) Squelch delay (p. 63) Microphone sensitivity (p. 63) Squelch attenuator (p. 63) Active band (p. 64) Repeater tone frequency (p.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan A-6265D-1EX Printed in Japan © 2003 Icom Inc..
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