User manual ICOM IC-706AMKIIG

INSTRUCTION MANUAL i706MKTMG HF/VHF/UHF ALL MODE TRANSCEIVER This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. IMPORTANT Read this instruction manual carefully before attempting to operate the transceiver. Save this instruction manual. This instruction manual contains important safety and operating instructions for the IC-706MKIIG. PRECAUTIONS RWARNING HIGH VOLTAGE! NEVER attach an antenna or internal antenna connector during transmission. This may result in an electrical shock or burn. During mobile operation, DO NOT operate the transceiver without running the vehicle's engine. When transceiver power is ON and your vehicle's engine is OFF, the vehicle's battery will soon become exhausted. Make sure the transceiver power is OFF before starting the vehicle. This will avoid possible damage to the transceiver by ignition voltage spikes. During maritime mobile operation, keep the transceiver and microphone as far away as possible from the magnetic navigation compass to prevent erroneous indications. BE CAREFUL! The heatsink will become hot when operating the transceiver continuously for long periods. BE CAREFUL! If a linear amplifier is connected, set the transceiver's RF output power to less than the linear amplifier's maximum input level, otherwise, the linear amplifier will be damaged. Use Icom microphones only (supplied or optional). Other manufacturer's microphones have different pin assignments and connection to the IC-706MKIIG may damage the transceiver. Beat signals may be heard on some frequencies. These will occur as a result of circuit construction. For U.S.A. only Caution: Changes or modifications to this transceiver, not expressly approved by Icom Inc., could void your authority to operate this transceiver under FCC regulations. RNEVER apply AC to the [DC13.8V] socket on the transceiver rear panel. This could cause a fire or ruin the transceiver. RNEVER apply more than 16 V DC, such as a 24 V battery, to the [DC13.8V] socket on the transceiver rear panel. This could cause a fire or ruin the transceiver. RNEVER let metal, wire or other objects touch any internal part or connectors on the rear panel of the transceiver. This will cause electric shock. RNEVER expose the transceiver to rain, snow or any liquids. NEVER allow children to play with the transceiver. AVOID using or placing the transceiver in areas with temperatures below ­10°C (+14°F) or above +60°C (+140°F). Be aware that temperatures on a vehicle's dashboard can exceed 80°C, resulting in permanent damage to the transceiver's front panel if left there for extended periods. AVOID placing the transceiver in excessively dusty environments or in direct sunlight. AVOID placing the transceiver against walls or putting anything on top of the transceiver. This will obstruct heat dissipation. EXPLICIT DEFINITIONS The explicit definitions described below apply to this instruction manual. DEFINITION Personal injury, fire hazard or electric RWARNING shock may occur. CAUTION NOTE Equipment damage may occur. If disregarded, inconvenience only. No risk of personal injury, fire or electric shock. WORD i TABLE OF CONTENTS IMPORTANT ............................................................. PRECAUTIONS ........................................................ EXPLICIT DEFINITIONS .......................................... TABLE OF CONTENTS ............................................ UNPACKING ............................................................. I Front panel ............................................................... I Function switches ..................................................... I Rear and side panels ............................................... I Function display ....................................................... I Microphone (HM-103) ............................................... I Unpacking ................................................................. I Grounding ................................................................. I Antenna .................................................................... I Installation ................................................................ I Required connections ............................................... I Advanced connections ............................................. I Power supply connections ........................................ I External antenna tuners and linear amplifier ............ I When first applying power (CPU resetting) .............. I Initial settings ............................................................ I VFO description ........................................................ I Frequency setting ..................................................... I Mode selection ......................................................... I Functions for receive ................................................ I Functions for transmit ............................................... I Split frequency operation .......................................... I Tone squelch operation ............................................ I Tone scan operation ................................................. I One-touch repeater .................................................. I Auto repeater function .............................................. I Functions for CW ...................................................... I Functions for RTTY .................................................. I Packet operation ...................................................... I SWR ......................................................................... i i i ii ii 1 3 5 7 8 5 MEMORY AND SCAN OPERATION ............ 39­ 44 I Memory channels ..................................................... I Memory channel selection ........................................ I Memory clearing ....................................................... I Memory/call programming ........................................ I Frequency transferring ............................................. I Memory names ......................................................... I Memo pads ............................................................... I Scan types ................................................................ I Preparation .............................................................. I Programmed scan operation .................................... I Memory scan operation ............................................ I Select memory scan operation ................................. I Priority watch ............................................................ 39 39 39 40 41 41 42 43 43 44 44 44 44 1 PANEL DESCRIPTION ..................................... 1­ 8 2 INSTALLATION AND CONNECTIONS .......... 9­ 14 9 9 9 10 11 12 13 14 15 15 16 17 19 20 25 29 31 31 32 32 33 35 37 38 6 REMOTE JACK (CI-V) INFORMATION ........ 45­46 7 SET MODE .................................................... 47­ 55 I General ..................................................................... 47 I Quick set mode items ............................................... 48 I Initial set mode items ............................................... 50 8 MAINTENANCE ................................................... 56 I Fuse replacement ..................................................... 56 I Memory backup ........................................................ 56 I Cleaning ................................................................... 56 3 FREQUENCY SETTING ................................ 15­ 19 9 TROUBLESHOOTING .................................. 57­ 58 10 OPTIONAL INSTALLATIONS/SETTINGS .. 59­ 62 I Opening the transceiver case ................................... I UT-102 VOICE SYNTHESIZER UNIT ............................... I CR-282 HIGH-STABILITY CRYSTAL UNIT ........................ I IF filters ..................................................................... I UT-106 DSP RECEIVER UNIT ....................................... I MB-72 CARRYING HANDLE .......................................... I AT-180 internal switch description ............................ 59 59 60 60 61 61 62 4 RECEIVE AND TRANSMIT .......................... 20­ 38 11 INTERNAL VIEWS ............................................. 63 12 OPTIONS .................................................... 64­ 65 13 SPECIFICATIONS ............................................. 66 14 MENU GUIDE .............................................. 67­68 UNPACKING Accessories included with the IC-706MKIIG: Qty. q DC power cable* ....................................................1 w Hand microphone (HM-103)...................................1 e Spare fuse (30 A) ...................................................2 r Spare fuse (4 A) .....................................................1 t RTTY key plug........................................................1 y Electronic keyer plug ..............................................1 u ACC cable ..............................................................1 i Ferrite bead** .........................................................1 *OPC-639 for Europe versions (differs from the diagram at left), OPC-025D for other versions. q w t y e r u i **Not supplied with some versions. ii 1 PANEL DESCRIPTION I Front panel we AF RF/SQL HF/VHF/UHF TRANSCEIVER r i706MKTMG t yu MODE i o Y BAND q @2 @1 @0 POWER P.AMP/ATT USB TS RX S1 3 5 7 9 5 20 40 60dB 10 VFO A CH TUNER/CALL RIT/ SUB M-CH SHIFT TX PO M1 SPL A/B A=B MENU F-1 F-2 F-3 DISPLAY !0 PHONES LOCK !9 BAND Z o !8 !7 !6 !5 !4 !3 !2 !1 q POWER SWITCH [POWER] (p. 15) Turns power ON and OFF. · Push momentarily to turn power ON. · Push for 2 sec. to turn power OFF. w AF GAIN CONTROL [AF] (inner control; p. 15) Rotate clockwise to increase the audio output from the speaker; rotate counterclockwise to decrease the audio output from the speaker. e RF GAIN CONTROL/SQUELCH CONTROL [RF/SQL] (outer control; p. 22) Adjusts the squelch threshold level (to mute noise when receiving no signal) in all modes. This control can be used for RF gain control to adjust receiver gain manually. · RF gain selection can be set in initial set mode (p. 50). · RF gain is usable in SSB/CW/RTTY modes only. y MODE SWITCH [MODE] (p. 19) Push momentarily to cycle through the operating modes: USB/LSB CW/CWå RTTY/åRTTY FM/WFM/AM Push and hold for 2 sec. to toggle between the following operating modes: USB LSB CW CWå RTTY åRTTY FM ¡ WFM ¡ AM ¡ FM, etc. u RECEIVE/TRANSMIT INDICATORS [RX]/[TX] [RX] lights green while receiving (and squelch opens); [TX] lights red while transmitting. i MAIN DIAL Changes the displayed frequency, selects initial set mode items, etc. o UP/DOWN (BAND) SWITCHES [Y/Z(BAND)] Push to select a band. · Can also be used to advance quick set mode items, initial set mode items, etc. r FUNCTION DISPLAY Shows the operating frequency, dot matrix indications, selected memory channel, etc. See p. 7 for details. t TUNING STEP SWITCH [TS] (pgs. 17, 18) Push momentarily to cycle between 1 Hz/10 Hz, programmable and 1 MHz tuning steps. · 1 and 10 Hz steps are only available in SSB, CW and RTTY modes; 1 MHz steps are only available in FM, WFM and AM modes. Push and hold to scroll through the bands continuously. !0 MAIN DIAL TENSION LATCH Selects the main dial tension. · 2 positions are available. Push for 2 sec. to toggle between 1 and 10 Hz steps, or; when the programmable tuning steps is indicated, push for 2 sec. to enter programmable tuning step mode. !1 MICROPHONE CONNECTOR (p. 8) Modular-type microphone connector--connects the supplied microphone (HM-103). · The optional OPC-589 can be used to connect an 8-pin microphone such as the SM-8 or SM-20, if desired. · A microphone connector is also available on the rear 1 PANEL DESCRIPTION 1 panel. DO NOT connect 2 microphones simultaneously. !2 LOCK SWITCH [LOCK] Push momentarily to turn the dial lock function ON and OFF. · The dial lock function electronically locks the main dial. !8 M-CH CONTROL [M-CH] (inner control) When the RIT or SUBDIAL functions are OFF, rotate to select a memory channel number (p. 35). Shifts the receive frequency while the RIT function is ON in SSB, CW and RTTY modes (see below and p. 20). · RIT variable range is ± 9.99 kHz When the optional UT-102 VOICE SYNTHESIZER UNIT is installed (p. 52), push for 2 sec. to have the frequency, etc. announced. · UT-102 operation can be adjusted in initial set mode (pgs. 53, 54). LOCK Changes the operating frequency in the selected tuning steps while the SUB DIAL function is ON (p. 18). !9 HEADPHONE JACK [PHONES] (p. 12) Accepts headphones with 4­16 impedance. · When headphones are connected, no receive audio comes from the speaker. · When the PHONES/SPEAKER switch on the back of the front panel is set to the [SPEAKER] position, an external speaker can be connected. This is convenient for mobile or outdoor operation. Lights while the lock function is activated. !3 DISPLAY SWITCH [DISP] (p. 68) Push momentarily to select one of the three menu sets: M1 to M4, S1 to S4 and G1 to G4. Push for 2 sec. to select quick set mode. !4 FUNCTION SWITCHES [F1]/[F2]/[F3] (pgs. 3, 4, 68) Push to select the function indicated in the dot matrix display above these switches. · Functions vary depending on the menu set selected. @0 TUNER/CALL SWITCH [TUNER/CALL] (pgs. 26, 27) During HF/50 MHz operation, push this switch momentarily to toggle the automatic antenna tuner function ON/OFF. · An optional antenna tuner must be connected. !5 MENU SWITCH [MENU] (p. 68) Push this switch one or more times to select menus within a menu set (M, S or G), or push to advance through the quick set mode and initial set mode displays. Push and hold to jump between two different function menu sets. During HF/50 MHz operation, push this switch for 2 sec. to manually tune the antenna. · An optional antenna tuner must be connected. During 144/430 MHz operation, push this switch momentarily to select the call channel (or the previous channel/frequency when the call channel is already selected). (p. 39) · "C1" is the 144 MHz call channel and "C2" is the 430 MHz call channel. TUNER/CALL !6 RIT/SUB DIAL SWITCH [RIT/SUB] (p. 20) Push to toggle the RIT or SUB DIAL function ON and OFF--initial set mode is used to select the desired action*. · Lights green when the SUB DIAL function is ON; lights red when the RIT function is ON. · Use the [M-CH] control to vary the RIT frequency or SUB DIAL frequency (see above). Lights while the automatic tuning function is activated. When the RIT function is ON, push for 2 sec. to add or subtract the shifted frequency to the operating frequency. RIT SUB @1 FRONT PANEL LATCH (p. 10) Pull away from the transceiver (towards yourself when looking at the front of the transceiver) to detach the front panel from the main body of the transceiver. @2 PREAMP/ATTENUATOR SWITCH [P.AMP/ATT] (p. 21) Push momentarily to turn the preamp ON or OFF. Push and hold to turn the 20 dB attenuator ON; push momentarily to turn the attenuator OFF. · Lights green when the preamp is ON; lights red when the 20 dB attenuator is ON. P.AMP/ATT Lights red while the RIT function is activated; green while the SUB DIAL function is activated. *Even if RIT is selected in initial set mode, RIT cannot be selected when operating AM, FM or WFM modes. !7 SHIFT CONTROL [SHIFT] (outer control; p. 20) Shifts the center frequency of the receiver's IF passband. · Rotate the control clockwise to shift the center frequency higher, or rotate the control counterclockwise to shift the center frequency lower. · When the graphic menu display (G2) is selected, the IF passband is graphically displayed and changes in accordance with the [SHIFT] control (see p. 20). Lights green while the preamp is activated; lights red while the attenuator is activated. 2 1 PANEL DESCRIPTION I Function switches D M1 FUNCTIONS MEMORY CLEAR (p. 39) Clears the selected memory channel's contents. · "}" appears. F-2 MCL M1 MENU SPL F-1 A/B F-2 A=B F-3 D M3 FUNCTIONS XFC SPLIT OPERATION (p. 29) Toggles the split function ON and OFF. M3 MENU FIL F-1 NB F-2 MET F-3 SPL F-1 · "ä"appears when the split function is ON. · The function of [F-3] changes to XFC when the split function is ON. NARROW FILTER (p. 23) Toggles the narrow filter (or wide filter-- push for 2 sec.) ON and OFF. FIL F-1 VFO A/B SELECTION (p. 16) Toggles between VFO A and VFO B in VFO mode. F-2 Toggles between transmission VFO and reception VFO during split operation. Toggles between the transmit and receive frequencies (and modes) of memory channels when the split function is turned ON. A/B · "ã"appears when the narrow filter is ON; "ç" appears when the wide filter is ON. · An optional narrow filter and presetting in initial set mode (p. 51) is necessary to use the following: CW/RTTY narrow: FL-100, FL-101 or FL-232 SSB narrow: FL-223 SSB wide: FL-103 NOISE BLANKER (p. 21) Turns the noise blanker ON and OFF. VFO EQUALIZATION (p. 16) Equalizes the frequency and operating mode of the two VFO's. NB F-2 A=B F-3 · The rear (undisplayed) frequency and operating mode are equalized to the front (displayed) VFO frequency and operating mode. · The noise blanker does not function in FM and WFM modes; the "AM Noise blanker" item in initial set mode must be set to ON for the noise blanker to work in AM mode (p. 53). TRANSMIT FREQUENCY CHECK (p. 29) Appears when the split function is turned ON--monitors the transmit frequency F-3 when pushed and held. XFC METER SELECTION (p. 25) Selects the type of meter displayed (during transmit) in the function display. MET F-3 · While pushed, the transmit frequency can be changed with the main dial. · Power, ALC or SWR metering can be selected. · Only an S-meter is available for receive. D M4 FUNCTIONS DURING SSB/AM OPERATION: D M2 FUNCTIONS M2 MENU MW F-1 MÜV F-2 V/M F-3 M4 MENU VOX F-1 COM F-2 AGC F-3 MCL(in memory mode) MEMORY WRITE (p. 40) Stores the displayed frequency and operating mode into the displayed memory F-1 channel. DURING CW OPERATION: M4 MENU i/4 F-1 BRK F-2 AGC F-3 MW MEMORY TRANSFER (p. 41) Transfers the frequency and operating mode in the selected memory channel to a F-2 VFO. DURING RTTY OPERATION: MÜV M4 MENU 1/4 F-1 F-2 AGC F-3 VFO/MEMORY (p. 39) Toggles between VFO and memory modes. DURING FM OPERATION: V/M F-3 M4 MENU VOX F-1 TSQ F-2 TON F-3 3 PANEL DESCRIPTION 1 VOX FUNCTION (p. 26) Toggles the VOX function ON and OFF. VOX F-1 MPR F-3 MEMO PAD READ (p. 42) Calls up a memo pad. · The [VOX GAIN] and [ANTI VOX] are available on the side panel. · VOX delay can be set in quick set mode (p. 48). D S2 FUNCTIONS SPEECH COMPRESSOR (p. 26) Toggles the speech compressor ON and OFF. S2 MENU SCN F-1 PRI F-2 V/M F-3 COM F-2 · The [COMP GAIN] control is available on the side panel. SEL (in memory mode) SCN F-1 AGC (p. 21) Changes the time constant of the AGC circuit. SCAN (p. 44) Starts and stops the scan function. PRIORITY WATCH (p. 44) Starts and stops priority watch. SELECT SCAN (p. 44) Toggles the select setting ON and OFF for the selected memory channel. VFO/MEMORY (p. 44) Toggles between VFO and memory modes. AGC F-3 PRI F-2 BREAK-IN (p. 33) Selects semi break-in, full break-in (QSK) and break-in OFF BRK F-2 SEL F-2 · "BK" or "F-BK" appears when selecting semi break-in or full break-in, respectively. · An external switch, such as a foot switch, is necessary to connect to the ACC socket (pin 3, pin 7 or RTTY SEND--see p. 35) to use no break-in operation. V/M F-3 1/4 FUNCTION (p. 36) Toggles the 1/4 function ON and OFF. D S3 FUNCTIONS 1/4 F-1 · When the 1/4 function is ON, a bar appears under the 1/4 indication and fine tuning can be used. S3 MENU 7 F-1 50 F-2 144 F-3 TONE SQUELCH (p. 31) Toggles the tone squelch function ON and OFF (a tone squelch frequency must be F-2 selected in Quick Set mode). TSQ · "FM-TSQL" appears when the function is ON. QUICK BAND CHANGE FUNCTION (p. 19) This item provides access to the band stacking register. By default the 7, 50 and 144 MHz bands are displayed. Push [F-1] to [F-3] for 2 sec. to select a new band if desired. · A mode is memorized along with the frequency for each band. REPEATER TONE OPERATION (p. 30) Toggles the subaudible tone encoder for repeater use ON and OFF. TON F-3 · "FM-T" appears when the function is ON. D S4 FUNCTIONS (may be optional for some ver.) Transmits a 1750 Hz tone burst when pushed and held during transmission. · Tone frequencies or tone burst can be set in initial set mode (p. 49). S4 MENU ANF F-1 NR F-2 NRL F-3 D S1 FUNCTIONS ANF F-1 S1 MENU MW F-1 MPW F-2 MPR F-3 AUTOMATIC NOTCH FILTER (p. 24) This function automatically attenuates beat tones, tuning signals, etc., even if they are moving. NOISE REDUCTION (p. 24) This function reduces noise components and picks out desired signals which are buried in the noise. NOISE REDUCTION DISPLAY (p. 24) This displays the noise reduction level when using the noise reduction function. NR F-2 MW F-1 MEMORY WRITE (p. 40) Stores the displayed frequency and operating mode into the displayed memory channel. MEMO PAD WRITE (p. 42) Stores the displayed frequency and operating mode into a memo pad. NRL F-3 MPW F-2 4 1 PANEL DESCRIPTION I Rear and side panels t e ANT 1 y u i !2 !3 r MIC KEY COMP GAIN DC 1 3 .8 V BEEP /SIDE T w TUNER EXT SP q GND ANT 2 !1 !0 o q GROUND TERMINAL [GND] (p. 9) Connect this terminal to a ground to prevent electrical shocks, TVI, BCI and other problems. w ANTENNA CONNECTORS [ANT 1], [ANT 2] (p. 11) Accept a 50 antenna with an PL-259 type plug. · [ANT 1] is for connection to an HF/50 MHz antenna. · [ANT 2] is for connection to 144 MHz antenna. · These connectors are switched above or below 60 MHz. When connecting a straight key () When connecting a paddle (dot) (com) (dash) e DATA JACK [DATA] (p. 12) 6-pin min DIN jack to connect a TNC, etc. for packet operation. r ACCESSORY SOCKET [ACC] (p. 6) Enables connection to external equipment such as a TNC for data communications, a linear amplifier or an automatic antenna selector/tuner, etc. · See page at right for socket information. o DC POWER SOCKET [DC13.8V] (p. 13) Accepts 13.8 V DC through the supplied DC power cable. Rear panel view t RTTY JACK [RTTY] (p. 35) Connects an external terminal unit for RTTY (FSK) operation. · The keying polarity and mark/shift frequencies can be selected in quick set mode (p. 48). !0 EXTERNAL SPEAKER JACK [EXT SP] (p. 12) Accepts a 4­16 speaker. !1 TUNER CONTROL SOCKET [TUNER] (p. 12) Accepts the control cable from an optional AH-3 AUTOMATIC ANTENNA TUNER. HF y CI-V REMOTE CONTROL JACK [REMOTE] (p. 45) Designed for use with a personal computer for remote operation of transceiver functions. u MICROPHONE CONNECTOR [MIC] (p. 11) Accepts the supplied microphone (connected in parallel with the front panel's [MIC] connector). · See pgs. 1 and 2 for microphone notes. · See p. 8 for microphone connector information. !2 SPEECH COMPRESSION LEVEL CONTROL [COMP GAIN] (p. 26) Adjusts the compression level. · This control is available only when the speech compressor is ON. Recommended level Counterclockwise decreases COMP GAIN BEEP /SIDE T i ELECTRONIC KEYER JACK [KEY] (p. 33) Accepts a paddle to activate the internal electronic keyer. 5 · Selection between the internal electronic keyer and straight key operation can be made in quick set mode. (p. 49) Clockwise increases PANEL DESCRIPTION 1 !3 BEEP/SIDETONE CONTROL [BEEP/SIDETONE] Adjusts the beep tone and CW side tone audio levels. TECHNICAL INFORMATION · ACC SOCKET ACC PIN # NAME 1 2 8V GND DESCRIPTION Regulated 8 V output. Connects to ground. SPECIFICATIONS Output voltage Output current : 8 V ±0.3 V : Less than 10 mA COLOR brown red 3 Input/output pin (HF/50 MHz). Ground level : ­0.5 V to 0.8 V Goes to ground when transmitting. HSEND Input current : Less than 20 mA When grounded, transmits (connected to 8V (HF/50 MHz bands) line thru 2.2 k resistance/144 MHz operation). orange 4 5 6 13 9 10 11 12 5678 1234 BDT BAND ALC Data line for the optional AT-180. Band voltage output. (Varies with amateur band) ALC voltage input. Output voltage Control voltage Input impedance : 0 to 8.0 V : ­4 to 0 V : More than 10 k yellow green blue 7 Input/output pin (144 MHz). Goes to ground when transmitting. VSEND When grounded, transmits (connected to 8V line thru 2.2 k resistance/HF·50 MHz operation). Ground level : ­0.5 V to 0.8 V Input current : Less than 20 mA (144 MHz band) Output current : Max. 1 A purple Rear panel view 8 9 13.8 V TKEY 13.8 V output when power is ON. Key line for the AT-180. RTTY keying input. Connected in parallel to the [RTTY] jack. Modulator input. AF detector output. Fixed, regardless of [AF] position. Squelch output. Goes to ground when squelch opens. gray white 10 FSKK Ground level Input current Input impedance Input level rms : ­0.5 to 0.8 V : Less than 10 mA : 10 k : Approx. 100 mV black 11 MOD pink 12 AF Output impedance : 4.7 k light Output level : 100 to 350 mV rms blue SQL open : Less than 0.3 V/5 mA SQL closed : More than 6.0 V/100 µA light green 13 SQLS · When connecting the ACC conversion cable (OPC-599) 4 1 6 13 9 10 11 12 5678 1234 2 8 5 3 7 Color refers to the cable strands of the supplied cable. FSKK GND HSEND MOD AF SQLS 13.8 V ALC ACC 1 2 5 3 7 4 1 6 8V GND HSEND BAND ALC VSEND 13.8 V ACC 2 6 1 PANEL DESCRIPTION I Function display q w ea r eb !4 !3 !2 N ANF NR W LSB USB CW R RTTY AM WFM TSQL SPL DSP t BLANK NB VOX F-BK COM F AGC DUP S1 3 5 7 9 20 40 60dB VFO A ALC VFO B 35 SWR PO 1 1.5 2 10 MEMO y i !0 u o M1 SPL A/B A=B !1 S CH q NARROW/WIDE FILTER INDICATORS "ã" appears when selecting AM narrow or FM narrow modes. When installing an optional narrow filter, narrow mode can be selected in CW, RTTY and SSB modes. · When the SSB wide filter is installed, "ç" appears during wide mode selection. !0 MEMORY CHANNEL NUMBER READOUT Shows the selected memory channel number. !1 DOT MATRIX INDICATORS These alphanumeric readouts show a variety of information such as current functions of the "F" keys [F1] to [F3], memory channel names, set mode items, etc. See p. 68 for an overview of these indicators. !2 METER READOUTS Functions as an S-meter while receiving. Functions as a power, ALC or SWR meter while transmitting. Note: The SWR meter does not function in the 144 MHz band. !3 FUNCTION INDICATORS "NB" appears when the noise blanker is activated. "VOX" appears when the VOX function is selected. "F-BK" appears when full break-in operation is selected and only "BK" appears when semi break-in operation is selected. "COM" appears when the speech compressor is activated. "FAGC" appears when the fast AGC function is selected. !4 DSP INDICATORS Appear when the optional DSP unit is installed and activated. w MODE INDICATORS Show the operating mode. e PROGRAMMABLE/1 MHz TUNING STEP INDICATORS a appears when the programmable tuning step is selected. b appears when the 1 MHz tuning step is selected. r SPLIT INDICATOR Shows that the split frequency function is activated. t FREQUENCY READOUT Shows the operating frequency. · "C" appears in place of the 1 Hz digit when the call channel is selected. y DUPLEX INDICATORS "DUP+" appears during plus duplex operation. "DUP­" appears during minus duplex operation. u BLANK INDICATOR Shows that the displayed memory channel is not programmed. · This indicator appears both in VFO and memory modes. i VFO/MEMORY INDICATORS VFO A or B appears when VFO mode is selected; MEMO appears when memory mode is selected. o SELECT INDICATOR Shows that the displayed memory channel is designated as a select memory channel. 7 PANEL DESCRIPTION 1 I Microphone (HM-103) LOCK DN OFF ON UP UP/DOWN SWITCHES [UP]/[DN] Change the operating frequency. · Push and hold to change the frequency continuously. · Tuning step is 50 Hz when no TS indicator appears. LOCK SWITCH [LOCK] Locks the [UP]/[DN] switches. PTT SWITCH [PTT] Push and hold to transmit; release to receive.