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INSTRUCTION MANUAL
i706MK ™G
HF/VHF/UHF ALL MODE 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..EXPLICIT DEFINITIONS
PRECAUTIONS
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.
R WARNING HIGH VOLTAGE! NEVER
attach an antenna or internal antenna connector dur-ing
transmission. This may result in an electrical shock
or burn.
R NEVER apply AC to the [DC13.8V] socket on the
transceiver rear panel. This could cause a fire or ruin
the transceiver.
R NEVER 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 trans-ceiver.
R NEVER let metal, wire or other objects touch any
internal part or connectors on the rear panel of the
transceiver. This will cause electric shock.
R NEVER 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.
During mobile operation, DO NOT operate the trans-ceiver
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 start-ing
the vehicle. This will avoid possible damage to the
transceiver by ignition voltage spikes.
During maritime mobile operation, keep the transceiv-er
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 lin-ear
amplifier's maximum input level, otherwise, the lin-ear
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 author-ity
to operate this transceiver under FCC regulations.
i
The explicit definitions described below apply to this
instruction manual.
WORD DEFINITION
R WARNING Personal injury, fire hazard or electric
shock may occur.
CAUTION Equipment damage may occur.
NOTE If disregarded, inconvenience only. No risk
of personal injury, fire or electric shock..TABLE OF CONTENTS
IMPORTANT ............................................................. i
PRECAUTIONS ........................................................ i
EXPLICIT DEFINITIONS .......................................... i
TABLE OF CONTENTS............................................ ii
UNPACKING............................................................. ii
1 PANEL DESCRIPTION ..................................... 1-8
Front panel ............................................................... 1
Function switches ..................................................... 3
Rear and side panels ............................................... 5
Function display ....................................................... 7
Microphone (HM-103)............................................... 8
2 INSTALLATION AND CONNECTIONS .......... 9-14
Unpacking ................................................................. 9
Grounding ................................................................. 9
Antenna .................................................................... 9
Installation
................................................................ 10
Required connections ............................................... 11
Advanced connections ............................................. 12
Power supply connections ........................................ 13
External antenna tuners and linear amplifier ............ 14
3 FREQUENCY SETTING................................ 15-19
When first applying power (CPU resetting) .............. 15
Initial settings
............................................................ 15
VFO description ........................................................ 16
Frequency setting ..................................................... 17
Mode selection ......................................................... 19
4 RECEIVE AND TRANSMIT .......................... 20-38
Functions for receive ................................................ 20
Functions for transmit ............................................... 25
Split frequency operation .......................................... 29
Tone squelch operation ............................................ 31
Tone scan operation ................................................. 31
One-touch repeater .................................................. 32
Auto repeater function .............................................. 32
Functions for CW ...................................................... 33
Functions for RTTY .................................................. 35
Packet operation ...................................................... 37
SWR
......................................................................... 38
5 MEMORY AND SCAN OPERATION ............ 39-44
Memory channels ..................................................... 39
Memory channel selection ........................................ 39
Memory clearing ....................................................... 39
Memory/call programming ........................................ 40
Frequency transferring ............................................. 41
Memory names ......................................................... 41
Memo pads ............................................................... 42
Scan types ................................................................ 43
Preparation .............................................................. 43
Programmed scan operation .................................... 44
Memory scan operation ............................................ 44
Select memory scan operation ................................. 44
Priority watch ............................................................ 44
6 REMOTE JACK (CI-V) INFORMATION ........ 45-46
7 SET MODE .................................................... 47-55
General
..................................................................... 47
Quick set mode items ............................................... 48
Initial set mode items ............................................... 50
8 MAINTENANCE ................................................... 56
Fuse replacement ..................................................... 56
Memory backup ........................................................ 56
Cleaning
................................................................... 56
9 TROUBLESHOOTING .................................. 57-58
10 OPTIONAL INSTALLATIONS/SETTINGS .. 59-62
Opening the transceiver case ................................... 59
UT-102 VOICE SYNTHESIZER UNIT ............................... 59
CR-282 HIGH-STABILITY CRYSTAL UNIT ........................ 60
IF filters
..................................................................... 60
UT-106 DSP RECEIVER UNIT ....................................... 61
MB-72 CARRYING HANDLE .......................................... 61
AT-180 internal switch description ............................ 62
11 INTERNAL VIEWS............................................. 63
12 OPTIONS .................................................... 64- 65
13 SPECIFICATIONS ............................................. 66
14 MENU GUIDE .............................................. 67-68
ii
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.
**Not supplied with some versions.
q
w
er
y t
u i.Front panel
qPOWER SWITCH [POWER] (p. 15)
Turns power ON and OFF.
oPush momentarily to turn power ON.
oPush for 2 sec. to turn power OFF.
wAF 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.
eRF 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.
oRF gain selection can be set in initial set mode (p. 50).
oRF gain is usable in SSB/CW/RTTY modes only.
rFUNCTION DISPLAY
Shows the operating frequency, dot matrix indica-tions,
selected memory channel, etc. See p. 7 for
details.
tTUNING STEP SWITCH [TS] (pgs. 17, 18)
.Push momentarily to cycle between 1 Hz/10 Hz,
programmable and 1 MHz tuning steps.
o1 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 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.
yMODE SWITCH [MODE] (p. 19)
.Push momentarily to cycle through the operating
modes:
USB/LSB .CW/CW å .RTTY/å RTTY .
.FM/WFM/AM
.Push and hold for 2 sec. to toggle between the
following operating modes:
USB .LSB
CW .CW å
RTTY å RTTY
FM WFM AM FM, etc.
uRECEIVE/TRANSMIT INDICATORS [RX]/[TX]
[RX] lights green while receiving (and squelch
opens); [TX] lights red while transmitting.
iMAIN DIAL
Changes the displayed frequency, selects initial set
mode items, etc.
oUP/DOWN (BAND) SWITCHES [ Y / Z (BAND)]
.Push to select a band.
oCan also be used to advance quick set mode items,
initial set mode items, etc.
.Push and hold to scroll through the bands contin-uously.
!0MAIN DIAL TENSION LATCH
Selects the main dial tension.
o2 positions are available.
!1MICROPHONE CONNECTOR (p. 8)
Modular-type microphone connector-connects the
supplied microphone (HM-103).
oThe optional OPC-589 can be used to connect an 8-pin
microphone such as the SM-8 or SM-20, if desired.
oA microphone connector is also available on the rear
1
1 PANEL DESCRIPTION
HF/VHF/UHF TRANSCEIVER i706MK ™G AF
RIT/
SUB
MENU F-1 F-2 F-3
MODE
BAND
BAND
Y
Z
TS
DISPLAY
LOCK
RX
TX
M-CH
PHONES
TUNER/CALL
P.AMP/ATT
POWER
SHIFT
RF/SQL
q
w e r t y i o
o
!1
!2 !3 !4 !5 !6 !7 !8
!9
@0
@2
@1
!0
u
CH
VFO A
PO
S1
5
5 3 792040
10
60dB
USB
M1 SPL A/B A=B.2
1 PANEL DESCRIPTION
panel. DO NOT connect 2 microphones simultaneously.
!2LOCK SWITCH [LOCK]
.Push momentarily to turn the dial lock function
ON and OFF.
o The dial lock function electronically locks the main
dial.
.When the optional UT-102 VOICE SYNTHESIZER
UNIT is installed (p. 52), push for 2 sec. to have
the frequency, etc. announced.
o UT-102 operation can be adjusted in initial set mode
(pgs. 53, 54).
!3DISPLAY 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.
!4FUNCTION SWITCHES [F1]/[F2]/[F3] (pgs. 3, 4, 68)
Push to select the function indicated in the dot
matrix display above these switches.
o Functions vary depending on the menu set selected.
!5MENU SWITCH [MENU] (p. 68)
.Push this switch one or more times to select
menus within a menu set (..., 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.
!6RIT/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*.
o Lights green when the SUB DIAL function is ON;
lights red when the RIT function is ON.
o Use the [M-CH] control to vary the RIT frequency or
SUB DIAL frequency (see above).
.When the RIT function is ON, push for 2 sec. to
add or subtract the shifted frequency to the oper-ating
frequency.
*Even if RIT is selected in initial set mode, RIT cannot be
selected when operating AM, FM or WFM modes.
!7SHIFT CONTROL [SHIFT] (outer control; p. 20)
Shifts the center frequency of the receiver's IF pass-band.
o Rotate the control clockwise to shift the center frequen-cy
higher, or rotate the control counterclockwise to shift
the center frequency lower.
o When the graphic menu display () is selected, the IF
passband is graphically displayed and changes in accor-dance
with the [SHIFT] control (see p. 20).
!8M-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 func-tion
is ON in SSB, CW and RTTY modes (see
below and p. 20).
o RIT variable range is ± 9.99 kHz
.Changes the operating frequency in the selected
tuning steps while the SUB DIAL function is ON
(p. 18).
!9HEADPHONE JACK [PHONES] (p. 12)
Accepts headphones with 4-16 .impedance.
o When headphones are connected, no receive audio
comes from the speaker.
o 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.
@0TUNER/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.
o An optional antenna tuner must be connected.
.During HF/50 MHz operation, push this switch for
2 sec. to manually tune the antenna.
o An optional antenna tuner must be connected.
.During 144/430 MHz operation, push this switch
momentarily to select the call channel (or the pre-vious
channel/frequency when the call channel is
already selected). (p. 39)
o"C1" is the 144 MHz call channel and "C2" is the 430
MHz call channel.
@1FRONT 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.
@2PREAMP/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.
o Lights green when the preamp is ON; lights red when
the 20 dB attenuator is ON.
LOCK
Lights while the lock
function is activated.
RIT
SUB
Lights red while the RIT function is activated;
green while the SUB DIAL function is activated.
TUNER/CALL
Lights while the automatic
tuning function is activated.
P.AMP/ATT
Lights green while the preamp is activated;
lights red while the attenuator is activated..Function switches
D M1 FUNCTIONS
SPLIT OPERATION (p. 29)
Toggles the split function ON and OFF.
o"ä "appears when the split function is ON.
o The function of [F-3] changes to XFC when the
split function is ON.
VFO A/B SELECTION (p. 16)
.Toggles between VFO A and VFO B in
VFO mode.
.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 func-tion
is turned ON.
VFO EQUALIZATION (p. 16)
Equalizes the frequency and operating
mode of the two VFO's.
o The rear (undisplayed) frequency and operat-ing
mode are equalized to the front (displayed)
VFO frequency and operating mode.
TRANSMIT FREQUENCY CHECK (p. 29)
Appears when the split function is turned
ON-monitors the transmit frequency
when pushed and held.
o While pushed, the transmit frequency can be
changed with the main dial.
D M2 FUNCTIONS
MEMORY WRITE (p. 40)
Stores the displayed frequency and oper-ating
mode into the displayed memory
channel.
MEMORY TRANSFER (p. 41)
Transfers the frequency and operating
mode in the selected memory channel to a
VFO.
VFO/MEMORY (p. 39)
Toggles between VFO and memory
modes.
MEMORY CLEAR (p. 39)
Clears the selected memory channel's
contents.
o"}" appears.
D M3 FUNCTIONS
NARROW FILTER (p. 23)
Toggles the narrow filter (or wide filter-
push for 2 sec.) ON and OFF.
o"ã "appears when the narrow filter is ON; " ç "
appears when the wide filter is ON.
o An optional narrow filter and presetting in initial
set mode (p. 51) is necessary to use the fol-lowing:
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.
o 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).
METER SELECTION (p. 25)
Selects the type of meter displayed (during
transmit) in the function display.
o Power, ALC or SWR metering can be select-ed.
o Only an S-meter is available for receive.
D M4 FUNCTIONS
DURING SSB/AM OPERATION:
DURING CW OPERATION:
DURING RTTY OPERATION:
DURING FM OPERATION:
F-3
MET
F-2
NB
F-1
FIL
F-2
MCL
F-3
V/M
F-2
MÜV
F-1
MW
F-3
XFC
F-3
A=B
F-2
A/B
F-1
SPL
3
1 PANEL DESCRIPTION
MENU
M3
F-1
FIL
F-2
NB
F-3
MET
MENU
M4
F-1
VOX
F-2
COM
F-3
AGC
MENU
M4
F-1 F-2
BRK i/4
F-3
AGC
MENU
M2
F-1
MW
F-2
MÜV
MCL
F-3
V/M
(in memory mode)
MENU
M4
F-1
1/4
F-2 F-3
AGC
MENU
M4
F-1
VOX
F-2
TSQ
F-3
TON
MENU
M1
F-1
SPL
F-2
A/B
XFC
F-3
A=B.4
1 PANEL DESCRIPTION
VOX FUNCTION (p. 26)
Toggles the VOX function ON and OFF.
o The [VOX GAIN] and [ANTI VOX] are avail-able
on the side panel.
o VOX delay can be set in quick set mode
(p. 48).
SPEECH COMPRESSOR (p. 26)
Toggles the speech compressor ON and
OFF.
o The [COMP GAIN] control is available on the
side panel.
AGC (p. 21)
Changes the time constant of the AGC cir-cuit.
BREAK-IN (p. 33)
Selects semi break-in, full break-in (QSK)
and break-in OFF
o"BK" or "F-BK" appears when selecting semi
break-in or full break-in, respectively.
o 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.
1/4 FUNCTION (p. 36)
Toggles the 1/4 function ON and OFF.
o When the 1 /4 function is ON, a bar appears
under the 1 /4 indication and fine tuning can be
used.
TONE SQUELCH (p. 31)
Toggles the tone squelch function ON and
OFF (a tone squelch frequency must be
selected in Quick Set mode).
o"FM-TSQL" appears when the function is ON.
REPEATER TONE OPERATION (p. 30)
.Toggles the subaudible tone encoder for
repeater use ON and OFF.
o"FM-T" appears when the function is ON.
.Transmits a 1750 Hz tone burst when
pushed and held during transmission.
o Tone frequencies or tone burst can be set in
initial set mode (p. 49).
D S1 FUNCTIONS
MEMORY WRITE (p. 40)
Stores the displayed frequency and oper-ating
mode into the displayed memory
channel.
MEMO PAD WRITE (p. 42)
Stores the displayed frequency and oper-ating
mode into a memo pad.
MEMO PAD READ (p. 42)
Calls up a memo pad.
D S2 FUNCTIONS
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.
D S3 FUNCTIONS
QUICK BAND CHANGE FUNCTION (p. 19)
This item provides access to the band stacking regis-ter.
By default the 7, 50 and 144 MHz bands are dis-played.
Push [F-1] to [F-3] for 2 sec. to select a new
band if desired.
o A mode is memorized along with the frequency for each
band.
D S4 FUNCTIONS (may be optional for some ver.)
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. F-3
NRL
F-2
NR
F-1
ANF
F-3
V/M
F-2
SEL
F-2
PRI
F-1
SCN
F-3
MPR
F-2
MPW
F-1
MW
F-3
TON
F-2
TSQ
F-1
1/4
F-2
BRK
F-3
AGC
F-2
COM
F-1
VOX
MENU
S1
F-1
MW
F-2
MPW
F-3
MPR
MENU
S2
F-1
SCN
F-2
PRI
SEL
F-3
V/M
(in memory mode)
MENU
S3
F-1
7
F-2
50
F-3
144
MENU
S4
F-1
ANF
F-2
NR
F-3
NRL.5
1 PANEL DESCRIPTION
Rear and side panels
qGROUND TERMINAL [GND] (p. 9)
Connect this terminal to a ground to prevent electri-cal
shocks, TVI, BCI and other problems.
wANTENNA CONNECTORS [ANT 1], [ANT 2] (p. 11)
Accept a 50 .antenna with an PL-259 type plug.
o [ANT 1] is for connection to an HF/50 MHz antenna.
o [ANT 2] is for connection to 144 MHz antenna.
o These connectors are switched above or below 60 MHz.
eDATA JACK [DATA] (p. 12)
6-pin min DIN jack to connect a TNC, etc. for pack-et
operation.
rACCESSORY 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.
o See page at right for socket information.
tRTTY JACK [RTTY] (p. 35)
Connects an external terminal unit for RTTY (FSK)
operation.
o The keying polarity and mark/shift frequencies can be
selected in quick set mode (p. 48).
yCI-V REMOTE CONTROL JACK [REMOTE]
(p. 45)
Designed for use with a personal computer for
remote operation of transceiver functions.
uMICROPHONE CONNECTOR [MIC] (p. 11)
Accepts the supplied microphone (connected in par-allel
with the front panel's [MIC] connector).
o See pgs. 1 and 2 for microphone notes.
o See p. 8 for microphone connector information.
iELECTRONIC KEYER JACK [KEY] (p. 33)
Accepts a paddle to activate the internal electronic
keyer.
o Selection between the internal electronic keyer and
straight key operation can be made in quick set mode.
(p. 49)
oDC POWER SOCKET [DC13.8V] (p. 13)
Accepts 13.8 V DC through the supplied DC power
cable.
!0EXTERNAL SPEAKER JACK [EXT SP] (p. 12)
Accepts a 4-16 .speaker.
!1TUNER CONTROL SOCKET [TUNER] (p. 12)
Accepts the control cable from an optional AH-3 HF
AUTOMATIC ANTENNA TUNER.
!2SPEECH COMPRESSION LEVEL CONTROL
[COMP GAIN] (p. 26)
Adjusts the compression level.
o This control is available only when the speech compres-sor
is ON.
COMP
GAIN /SIDE T
BEEP
DC 13.8V EXT SP
MIC KEY
TUNER
ANT 1
ANT 2
GND
q
w
e r ui
o
!2!3
!0 !1
t y
When connecting
a straight key
When connecting
a paddle
(dot)
(com)
(dash)
(...)
Rear panel view
Recommended
level
Counterclockwise
decreases
Clockwise
increases
COMP
GAIN /SIDE T
BEEP.oACC SOCKET
oWhen connecting the ACC conversion cable (OPC-599)
6
1 PANEL DESCRIPTION
!3BEEP/SIDETONE CONTROL [BEEP/SIDETONE]
Adjusts the beep tone and CW side tone audio lev-els.
TECHNICAL INFORMATION
ACC PIN # NAME DESCRIPTION SPECIFICATIONS COLOR
1 8 V Regulated 8 V output. Output voltage :8 V ±0.3 V
Output current :Less than 10 mA brown
2 GND Connects to ground. red
3 HSEND
Input/output pin (HF/50 MHz).
Goes to ground when transmitting.
When grounded, transmits (connected to 8V
line thru 2.2 k....resistance/144 MHz operation).
Ground level :-0.5 V to 0.8 V
Input current :Less than 20 mA
(HF/50 MHz bands)
orange
4 BDT Data line for the optional AT-180. yellow
5 BAND Band voltage output.
(Varies with amateur band) Output voltage :0 to 8.0 V green
6 ALC ALC voltage input. Control voltage :-4 to 0 V
Input impedance :More than 10 k....blue
7 VSEND
Input/output pin (144 MHz).
Goes to ground when transmitting.
When grounded, transmits (connected to 8V
line thru 2.2 k....resistance/HFo50 MHz operation).
Ground level :-0.5 V to 0.8 V
Input current :Less than 20 mA
(144 MHz band)
purple
8 13.8 V 13.8 V output when power is ON. Output current :Max. 1 A gray
9 TKEY Key line for the AT-180. white
10 FSKK RTTY keying input.
Connected in parallel to the [RTTY] jack.
Ground level :-0.5 to 0.8 V
Input current :Less than 10 mA black
11 MOD Modulator input.
Input impedance :10 k....
Input level :Approx. 100 mV
rms
pink
12 AF AF detector output.
Fixed, regardless of [AF] position.
Output impedance :4.7 k....
Output level :100 to 350 mV rms
light
blue
13 SQLS Squelch output.
Goes to ground when squelch opens.
SQL open :Less than 0.3 V/5 mA
SQL closed :More than 6.0 V/100 µA
light
green
Rear panel
view
1 234
8 7 6 5
9 10 11 12
13
Color refers to the
cable strands of the
supplied cable.
ACC 1
ACC 2
. FSKK . AF
. GND . SQLS
. HSEND . 13.8 V
MOD . ALC
. 8 V . ALC
. GND . VSEND
. HSEND . 13.8 V
BAND
1
1
2
2
3
3
4
4
8
8
7
7
6
6
5
5
9 10 11 12
13
1
2
3
4
7 6
5.7
1 PANEL DESCRIPTION
Function display
qNARROW/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.
oWhen the SSB wide filter is installed, " ç " appears
during wide mode selection.
w MODE INDICATORS
Show the operating mode.
ePROGRAMMABLE/1 MHz TUNING STEP
INDICATORS
.a appears when the programmable tuning step
is selected.
.b appears when the 1 MHz tuning step is
selected.
rSPLIT INDICATOR
Shows that the split frequency function is activated.
tFREQUENCY READOUT
Shows the operating frequency.
o"C" appears in place of the 1 Hz digit when the call chan-nel
is selected.
yDUPLEX INDICATORS
."DUP+" appears during plus duplex operation.
."DUP-" appears during minus duplex operation.
uBLANK INDICATOR
Shows that the displayed memory channel is not
programmed.
oThis indicator appears both in VFO and memory modes.
iVFO/MEMORY INDICATORS
VFO A or B appears when VFO mode is selected;
MEMO appears when memory mode is selected.
oSELECT INDICATOR
Shows that the displayed memory channel is desig-nated
as a select memory channel.
!0MEMORY CHANNEL NUMBER READOUT
Shows the selected memory channel number.
!1DOT 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 indi-cators.
!2METER 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.
!3FUNCTION INDICATORS
."NB" appears when the noise blanker is activat-ed.
."VOX" appears when the VOX function is select-ed.
."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.
!4DSP INDICATORS
Appear when the optional DSP unit is installed and
activated.
N W R SPL LSB
DSP
NB VOX F-BK COM
S
CH
VFO A
DUP
VFO B
MEMO
FAGC
ALC
SWR PO
S1
1 1.5 2 3 5
5 3 792040
10 8
60dB
USBCW RTTY AMWFM TSQL
BLANK
ANF
NR
q wr
t
y
u
o
!1
!2
!3
!4
i
!0
ea
eb
M1 SPL A/B A=B.oMICROPHONE CONNECTOR
8
1 PANEL DESCRIPTION
Microphone (HM-103)
UP/DOWN SWITCHES [UP]/[DN]
Change the operating frequency.
oPush and hold to change the frequency continuously.
oTuning 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.
DN UP
LOCK
OFF ON
TECHNICAL INFORMATION
PIN NO. FUNCTION DESCRIPTION
1 +8 V DC output Max. 10 mA
2 Frequency up Ground
Frequency down Ground through 470 .
8 Squelch open "LOW" level
Squelch closed "HIGH" level
.PTT
.Microphone input
.Frequency up/ down
.GND
.+8 V DC output
.Squelch switch
.GND (microphone ground)
.AF output
Rear panel view
12345678
oHM-103 SCHEMATIC DIAGRAM
4700p
4700p 100.33+
+
MICROPHONE
MIC
ELEMENT
2k
2.2k
470
DOWN UP
PTT RECEIVE
TRANSMIT
MICROPHONE
CABLE
MICROPHONE PLUG
12345678
Caution: DO NOT short pin 1 to ground as
this can damage the internal 8 V regulator..9
2 INSTALLATION AND CONNECTIONS
Unpacking
After unpacking, immediately report any damage to
the delivering carrier or dealer. Keep the shipping car-tons.
For a description and a diagram of accessory equip-ment
included with the IC-706MKIIG, see UNPACK-ING
on p. ii of this manual.
Grounding
To prevent electrical shock, television interference
(TVI), broadcast interference (BCI) and other prob-lems,
ground the transceiver through the GROUND
terminal on the rear panel.
For best results, connect a heavy gauge wire or strap
to a long earth-sunk copper rod. Make the distance
between the GROUND terminal and ground as short
as possible.
Antenna
Select antenna(s), such as a well-matched 50 .
antenna, and feedline. The transmission line should
be a coaxial cable. 1.5 : 1 or better of Voltage
Standing Wave Ratio (VSWR) is recommended for
your required band. Of course, the transmission line
should be a coaxial cable.
CAUTION: Protect your transceiver from lightning
using a lightning arrestor.
R WARNING:NEVER connect the [GND] ter-minal
to a gas or electric pipe, since the connection
could cause an explosion or electric shock.
30 mm
10 mm (soft solder)
10 mm
1-2 mm
solder solder
Soft
solder
Coupling ring
PL-259 CONNECTOR INSTALLATION EXAMPLE
..
..
Slide the coupling ring
down. Strip the cable
jacket and soft solder.
Slide the connector
body on and solder it.
Screw the coupling ring
onto the connector
body.
Strip the cable as
shown at left. Soft
solder the center con-ductor.
(10 mm ˜3 /8 in)
____
____
____
____
ANTENNA SWR
Each antenna is tuned for a specified frequency
range and SWR may be increased out-of-range.
When the SWR is higher than approx. 2.0 : 1, the
transceiver's power drops to protect the final transis-tors.
In this case, an optional antenna tuner is useful
to match the transceiver and antenna. Low SWR
allows full power for transmitting even when using
the antenna tuner. The IC-706MKIIG has an SWR
meter to monitor the antenna SWR continuously..To raise the stand:
With the transceiver upside down, pull the stand
towards the rear panel and then upwards, as illus-trated
below.
10
2 INSTALLATION AND CONNECTIONS
Installation
D Single body mounting D Stand
*CAUTION: Non-supplied screws (longer than 8 mm)
may damage the internal units.
MB-62
(optional)
Supplied with
the MB-62*
Pull back
then up
D Front panel separation
D Front panel mounting
.While pulling the panel release button towards you,
slide the front panel to the right (fig. 1).
.Attach the optional OPC-581 to the main body and
tighten the supplied screw as in fig. 2.
.Attach the other end of the OPC-581 to the
detached front panel as in fig. 3.
.Attach the MB-63 to a flat surface using the two
supplied screws (fig. 1).
.Fix the detached front panel to the MB-63 as illus-trated
in fig. 2.
Be careful of the orientation of the MB-63, other-wise,
the front panel may become attached in the
opposite direction.
fig. 1
fig. 2
fig. 3
fig. 1
fig. 2.11
2 INSTALLATION AND CONNECTIONS
Required connections
DC 13.8V EXT SP
MIC KEY
TUNER
ANT 1
ANT 2
GND
HF/VHF/UHF TRANSCEIVER i706MK ™G AF
RIT/
SUB
MENU F-1 F-2 F-3
MODE Y
Z
TS
DISPLAY
LOCK
RX
TX
M-CH
PHONES
TUNER/CALL
P.AMP/ATT
POWER
SHIFT
RF/SQL
BAND
BAND
MICROPHONE (p. 8) HF/50 MHz ANTENNA
RTTY TERMINAL
UNIT (p. 35)
2 m ANTENNA
PS-85 GROUND (p. 9)
HM-103
See p. 13 for details.
CW KEY (p. 33)
Use the heaviest gauge wire or
strap available and make the
connection as short as possible.
Grounding prevents electrical
shocks, TVI and other
problems..12
2 INSTALLATION AND CONNECTIONS
Advanced connections
DC 13.8V EXT SP
MIC KEY
TUNER
ANT 1
ANT 2
GND
OPC-589 (p. 65)
DESKTOP (p. 64)
MICROPHONE
SPEAKER
Selectable with the
[PHONE/SPEAKER] switch
on the back of the front panel.
ACC SOCKET (p. 6)
REMOTE (p. 45)
Used for computer control and transceive.
DATA JACK (p. 37)
6-pin mini DIN jack to connect to a
TNC, etc. for packet operation.
AH-3 (p. 14)
AH-2b
COAX ANTENNA
SWITCH
EXTERNAL
SPEAKER (p. 65)
HEADPHONES
SP-21
When using a 50 MHz
antenna separately
since the AH-3 can
only be used for the
HF bands.
or
HF/VHF/UHF TRANSCEIVER i706MK ™G AF
RIT/
SUB
MENU F-1 F-2 F-3
MODE Y
Z
TS
DISPLAY
LOCK
RX
TX
M-CH
PHONES
TUNER/CALL
P.AMP/ATT
POWER
SHIFT
RF/SQL
BAND
BAND.CONNECTING THE PS-125 / PS-85 DC POWER SUPPLY
PS-125 / PS-85
Connect to an AC outlet
using the supplied AC cable.
DC power cable
DC power
socket
CONNECTING A NON-ICOM
DC POWER SUPPLY (For Europe versions)
Transceiver
DC power
socket
To non-Icom
power supply
[GND]
OPC-639
CONNECTING A NON-ICOM
DC POWER SUPPLY
Transceiver
DC power
socket
To AC outlet
Supplied
DC power cable
13.8 V
Black
30 A fuses
Red
20 A
13
2 INSTALLATION AND CONNECTIONS
Power supply connections
Use the optional PS-125 / PS-85 DC POWER SUPPLY
when operating the IC-706MKIIG with AC power.
Refer to the diagram below for connection.
CAUTION: Before connecting the DC power
cable, check the following important items. Make
sure:
o The [POWER] switch is OFF.
o Output voltage of the power source is 12-15 V
when you use a non-Icom power supply.
o DC power cable polarity is correct.
Red : positive (+) terminal
Black : negative (-) terminal
Grommet
CONNECTING A VEHICLE BATTERY
NEVER connect to
a 24 V battery.
Note: Use terminals for
the cable connections.
Crimp
Solder
Supplied
DC power cable
red black
12 V
battery
Note: When using the PS-125, the IC-706MKIIG
Europe version complies with
EMC directives even if the OPC-639 is
not used..14
2 INSTALLATION AND CONNECTIONS
External antenna tuners and linear amplifier
AH-4 ANT 1
Transceiver
Coaxial cable
(from the AH-4)
To the AH-2b or
an antenna element
CONNECTING THE AH-4
The AH-4 can be used for the HF bands and 50
MHz band only.
CONNECTING THE AT-180
Ground
HF
to 6 m
antenna
[TRANSCEIVER]
[ANT 1] [ACC] [ACC] AT-180
ACC cable supplied with the AT-180 Coaxial cable supplied
with the AT-180
IC-706
one of two
connectors
ACC-1 REMOTE
INPUT-1 ANT1
ANT
Mini-plug cable
ACC cable
7-pin side
AC outlet (220-240 V)
IC-PW1
GND
GND
ACC REMOTE
Transceiver
Coaxial cable
To an
antenna OPC-599 conversion cable
CONNECTING THE IC-PW1
Note:
o Turn the IC-706MKIIG's power
OFF when connecting the AT-180,
otherwise, the CPU may
malfunction and the AT-180
may not function properly.
o The OPC-742 is required when
using both the AT-180 and a 2
m linear amplifier.
Do not connect [ANT 2] to the
AT-180. When using an HF to 2 m
wide antenna, use a duplexer
between the AT-180 and antenna
since 2 m signals do not pass
through the AT-180.
[ANT 1]
Transceiver
Duplexer
HF to 2 m
antenna AT-180
[ANT 2].15
3 FREQUENCY SETTING
When first applying power (CPU resetting)
Before first applying power, make sure all connections
required for your system are complete by referring to
section 2. Then, reset the transceiver using the fol-lowing
procedure.
.Make sure the transceiver power is OFF.
.While pushing [ Y ] and [ Z ], push [POWER] to turn
power ON.
o The internal CPU is reset.
o The transceiver displays as shown at right when reset-ting
is complete.
D M1 display selection
If you can't figure out how to return to the M1 display:
While pushing [MENU], turn power ON.
Initial settings
After resetting the transceiver, set controls and switch-es
as shown in the diagram below.
Note: Resetting clears all programmed contents in
memory channels and returns all initial set mode and
quick set mode contents to their default values.
BLANK
CH
VFO A S1 5 3 79204060dB
USB
M1 SPL A/B A=B
The transceiver displays
its initial frequency and
mode.
[POWER]
[ Y ]
[ Z ]
PO 5 10
[AF]: Max. CCW
[RF/SQL]: Max. CCW
[LOCK]: OFF
(indicator light out)
[POWER]: OFF
[SHIFT]: Center
[P.AMP/ATT]: OFF
(indicator lights out)
[TUNER/CALL]: OFF
(indicator lights out)
[RIT/SUB]: OFF
(indicator lights out)
CCW: counterclockwise
Turn power ON, then check the display. If any of the
following indicators appear, turn them OFF as follows:
o Tuning step indicators, Z , (SSB, CW or RTTY):
Push [TS].
o MHz tuning step indicator, Z , (FM, WFM or AM):
Push [TS].
o 1 Hz frequency readout (SSB, CW or RTTY):
Push and hold [TS].
o Memory mode indicator, MEMO:
Use [(F-3)V/M ] in the M2 display (p. 68).
o Split indicator, ä :
Use [(F-1)SPL ] in the M1 display (p. 68)..16
3 FREQUENCY SETTING
VFO description
VFO is an abbreviation of Variable Frequency
Oscillator, and traditionally refers to an oscillator. The
IC-706MKIIG's VFO can store a frequency and an
operating mode.
You can call up a desired frequency to a VFO with the
memo pad-read switch (p. 42) or with the memory
transfer switch (p. 42). You can also change the fre-quency
with the main dial and select an operating
mode with the [MODE] switch or call up previously
accessed frequency and modes with the band stack-ing
register (p. 19).
The IC-706MKIIG has two VFOs, specially suited for
split frequency operation. The VFOs are called VFO A
and VFO B. You can use the desired VFO to call up a
frequency and operating mode for operation.
CH
VFO A
USB
M1 SPL A/B A=B
VFO MODE
SWITCH
MEMORY
CHANNEL
DIAL
MEMO PAD
28.025 MHz 7.001 MHz
21.295 MHz
BAND
Select
Change
Transfer
Transfer
Transfer
o The differences between VFO and memory mode
VFO MODE
Each VFO shows a frequency and operating mode. If
the frequency or operating mode is changed, the
VFO automatically memorizes the new frequency or
operating mode.
When the VFO is selected from another VFO or
memory mode, the last-used frequency and operat-ing
mode for that VFO appear.
[EXAMPLE]
MEMORY MODE (pgs. 39-42)
Each memory channel shows a frequency and oper-ating
mode like a VFO. Even if the frequency or
mode is changed, the memory channel does not
memorize the new frequency or memory mode.
When a memory channel is selected from another
memory channel or VFO mode, the memorized fre-quency
and operating mode appear.
[EXAMPLE]
CH
VFO A
USB
CH
VFO A
USB
VFO is selected.
The frequency is changed.
MEMO
CH
VFO A
USB VFO is selected again.
Changed frequency (14.123 MHz) appears. Changed frequency (14.123 MHz) does
not appear and
memorised frequency (14.100 MHz) appears instead.
CH
USB Memory mode is selected.
CH
USB
CH
USB
Memory channel 1 is
selected.
The frequency is changed.
MEMO
MEMO
MEMO
MEMO
CH
USB Memory channel 1 is
selected again.
CH
USB Another memory channel
is selected..17
3 FREQUENCY SETTING
oProgrammable tuning steps
Programmable tuning steps are available to suit your
operating requirements.
These tuning steps are:
oIndependently selectable for each mode
oSelectable from 0.01 (FM/WFM/AM only), 0.1, 1, 5,
9, 10, 12.5, 15, 20 and 100 kHz
.Push [TS] one or more times until the programma-ble
tuning step indicator, " Z ," appears above the
1 kHz digit.
oRotating the main dial changes the frequency according
to the set tuning step.
.Push [TS] for 2 sec. while the programmable tun-ing
step indicator appears to enter the tuning step
selection mode.
oRotate DIAL appears.
.Rotate the main dial to set the desired tuning step.
oChange the mode and select tuning steps for other
modes, if desired.
.Push [TS] to exit the tuning step selection mode.
.Rotate the main dial to change the frequency
according to the set tuning step.
oBand selection
All HF ham bands, the 50 MHz band, the 144 MHz
band and a general coverage receiver band are
included in the IC-706MKIIG.
Push [(Y )BAND]/[(Z )BAND] to select the desired
band.
oPushing [(Y )BAND]/[(Z )BAND] continuously scrolls
through the available bands.
Note: The band stacking register can also be used to
select bands. Refer to p. 19.
USB
FM
USB
USB
LSB
Z
Z
Frequency setting
Programmable tuning
step indicator
10 kHz tuning step is
selected for USB
operation.
CH
VFO A
PO
S1
5
5 3 792040
10
60dB
USB
USB
M1 A/B A=B
DIAL
SPL
Rotate
o1 Hz and 10 Hz tuning steps
When neither the quick tuning step or programmable
tuning step, " Z ," appear, rotating the main dial
changes the frequency in increments of 1 or 10 Hz.
These tuning steps are only available in SSB, CW
and RTTY modes.
.Select SSB, CW or RTTY mode if necessary.
.Push [TS] for 2 sec. to toggle between the 1 and
10 Hz step settings.
oWhen the 1 Hz step is selected, the 1 Hz digit appears
in the frequency indication; when the 10 Hz step is
selected, the 1 Hz digit disappears from the frequency
indication.
Rotating the main dial
changes the frequency
in 10 Hz steps.
Rotating the main dial
changes the frequency
in 1 Hz steps.
TS Push for 2 sec.
VFO A
USB
VFO A
USB.18
3 FREQUENCY SETTING
o 1 MHz quick tuning step
The quick tuning step function allows you to change
the frequency in 1 MHz steps when rotating the main
dial. This function is only available in FM, WFM and
AM modes.
.Select FM, WFM or AM mode if necessary.
.Push [TS] momentarily to toggle between the 1
MHz tuning step and the programmable tuning
step.
o"Z " appears above the 1 MHz indicator when the 1
MHz tuning step is selected.
o When the 1 MHz tuning step is selected, slow rotation
of the main dial changes the frequency in 1 MHz steps
and fast rotation of the main dial changes the frequen-cy
in 5 MHz steps.
Quick tuning step
indicator
Rotating the main dial
changes the frequen-cy
in 1 MHz steps.
FM
FM
[TS] SWITCH FLOW CHART
SSB/CW/RTTY modes Any mode FM/WFM/AM modes
TS
USB
10 Hz tuning
USB
1 Hz tuning
momentarily momentarily
momentarily
2 sec. 2 sec.
2 sec.
TS
TS
1 MHz tuning
USB
Programmable step tuning
(100 Hz -100 kHz)
Selectable for each mode.
USB
Rotate DIAL
FM
o Sub dial function
The sub dial function allows you to change the oper-ating
frequency using the [M-CH] control. This gives
you more control in tuning since the [M-CH] knob is
detented-each click changes the frequency accord-ing
to the set tuning step. This function is always
available in FM, WFM and AM modes. However, in
SSB, CW and RTTY modes, the set mode item "Sub
dial function," must be set to "FrEq."
.Push [RIT/SUB] to turn the sub dial function ON.
o The [SUB] indicator lights green; if it lights red, the RIT
function is activated-sub dial function must be set in
initial set mode in this case.
.Rotate [M-CH] to change the operating frequency
according to the set tuning steps.
.Push [RIT/SUB] again to turn the function OFF.
o The [SUB] indicator turns off.
[SUB] switch
Indicator lights green
while the sub dial function
is activated.
[M-CH] control
RIT/
SUB.19
3 FREQUENCY SETTING
o Quick band change function
The quick band change function automatically stores
the last frequency and mode used for each band in a
band stacking register. This is convenient for contest
operation, etc. The tables below show the quick band
change default settings for each band.
.Select S3 .
o Push [DISPLAY] when M or G is displayed.
o Push [MENU] twice to select S3 .
.Push [F-1]-[F-3] to select a band stacking register.
o The default settings for [F-1]-[F-3] are 7, 144 and 430
MHz bands, respectively.
.To change the settings for [F-1]-[F-3] from their
defaults, push [F-1]-[F-3] for 1 sec. one or more
times to until the desired band appears in the dis-play
above the corresponding switch.
o The last-used frequency and mode for the selected
band are displayed.
*General refers to the general coverage receiver (in
the display) and the range varies according to version.
** 1.83000 MHz for Italy version (#10,#20).
Mode selection
The following modes are available in the IC-706MKIIG:
SSB (LSB/USB), CW, CW-å (CW reverse), FM,
WFM (receive only), AM, RTTY and å RTTY (RTTY
reverse).
To select the desired mode of operation push
[MODE] one or more times, then push [MODE] for 2
sec., if necessary. See the diagram at right for the
order of selection.
o The selected mode is indicated in the function display.
Note: If a desired mode cannot be selected, it may be
hidden using Initial Set mode (p. 50).
OPERATING MODE SELECTION
MODE
Push
momentarily
MODE
Push
for 2 sec.
USB LSB
CW CW å
RTTY å RTTY
FM WFM AM
BAND FREQUENCY MODE
18 MHz 18.15000 MHz USB
21 MHz 21.30000 MHz USB
24 MHz 24.95000 MHz USB
28 MHz 28.60000 MHz USB
50 MHz 50.10000 MHz USB
144 MHz 145.00000 MHz FM
BAND FREQUENCY MODE
1.9 MHz 1.91000 MHz** CW
3.5 MHz 3.56000 MHz LSB
7 MHz 7.06000 MHz LSB
10 MHz 10.13000 MHz CW
14 MHz 14.10000 MHz USB
General* 15.10000 MHz USB
BLANK
CH
VFO A S1 5 3 79204060dB
USB
S3 7 144 430
Display shows the
default bands for the
quick band change
function.
PO 5 10
BLANK
CH
VFO A S1 5 3 79204060dB
USB
S3 7 GEN 144
Display shows [F-2]
has been changed from
its default of the 50 MHz
band to the general
receiver band.
PO 5 10
430 MHz 433.00000 MHz FM.20
4 RECEIVE AND TRANSMIT
The IF shift function electronically changes the pass-band
frequency of the IF (intermediate frequency)
and cuts out higher or lower frequency components
of the IF to reject interference. The function shifts the
IF frequency up to ±1.2 kHz in 15 Hz steps in
SSB/CW/RTTY modes and up to ±250 Hz in 3 Hz
steps in CW-ã /RTTY-ã modes. The IF shift is not
available in FM and AM modes.
.Adjust the [SHIFT] control for a minimum interfer-ence
signal level.
o The audio tone may be changed while the IF shift is in
use.
.Set the shift control to its center position when
there is no interference.
o Graphic display
The IF shift is displayed graphically (for about 1 sec.)
each time the shift control is rotated.
M-CH M-CH M-CH SHIFT SHIFT SHIFT
Shifts low Center Shifts high
D RIT function
The RIT (Receive Incremental Tuning) function com-pensates
for off-frequencies of communicating sta-tions.
The function shifts the receive frequency up to
±9.99 kHz in 10 Hz steps without moving the transmit
frequency. The [SUB/RIT] switch in Initial Set Mode
must be set to RIT mode in advance (p. 51).
.Push [RIT].
o The [RIT] indicator lights red.
.Rotate the [M-CH] control to cancel the off-fre-quencies.
o The transmit frequency is not shifted.
.To cancel the RIT function, push [RIT] again.
o The [RIT] switch indicator goes out.
o Calculate function
The shift frequency of the RIT function can be
added/subtracted to the displayed frequency.
While the RIT indicator is lit, push and hold [RIT] for
2 sec.
Note: The RIT function is not available in FM, WFM
or AM modes regardless of the Initial Set mode set-ting
(p. 51).
[RIT] switch
Indicator lights red while
RIT function is activated.
Push for
2 sec.
[M-CH] control
USB
USB
CH
VFO A S1 5 3 79204060dB
USB
D IF shift function
Functions for receive.21
4 RECEIVE AND TRANSMIT
D Noise blanker
The noise blanker reduces pulse-type noise such as
that generated by automobile ignition systems. This
function is not effective for FM modes or for non pulse-type
noise. If you don't want to use the noise blanker
for AM communications, the "AM noise blanker" item
in Initial Set mode must be turned OFF (ON is the
default setting-p. 53).
.Select M3 .
o Push [DISPLAY] 1 or 2 times when S or G is displayed.
o Push [MENU] one or more times to select M3 .
.Push [(F-2)NB ] to toggle the noise blanker ON and
OFF.
o"NB" appears when the noise blanker is turned ON.
NB
CH
VFO A S1 5 3 79204060dB
USB
M3 NAR NB MET
Appears when the
noise blanker is
turned ON.
PO 5 10
D AGC time constant
The AGC (Automatic Gain Control) controls receiver
gain to produce a constant audio output level even
when the received signal strength is varied by fading,
etc. Use AGC slow for normal phone operation; AGC
fast for receiving data and searching for signals.
AGC time constant cannot be changed in FM mode.
.Select M4 .
o Push [DISPLAY] 1 or 2 times when S or G is displayed.
o Push [MENU] one or more times to select M4 .
.Push [(F-3)AGC ] to toggle the AGC time constant
between fast and slow.
o"FAGC" appears when the fast time constant is selected.
CH
VFO A S1 5 3 79204060dB
USB
M4 VOX COM AGC
Appears when
AGC fast is
selected.
FAGC
PO 5 10
D Preamp and attenuator
The preamp amplifies received signals in the front
end circuit to improve the S/N ratio and sensitivity.
Turn this function ON when receiving weak signals.
The attenuator prevents desired signals from distort-ing
when very strong signals are near the desired fre-quency
or when very strong electric fields, such as
from broadcasting stations, are near your location.
Push [P.AMP/ATT] momentarily to turn the preamp
ON and OFF; push and hold to turn the attenuator ON.
o Lights green when the preamp is ON; lights red when
the 20 dB attenuator is ON.
o Only one of these functions can be activated at a time.
P.AMP/ATT
Lights green while the preamp is activated;
lights red while the attenuator is activated.
D Peak meter hold
The peak meter hold function freezes the highest dis-played
bar segment in any meter function for about
0.5 sec. so that you can more easily read the meter.
This function can be turned ON and OFF in initial set
mode (see p. 51).
INITIAL SET MODE
S1 5 3 79204060dB
S1 5 3 79204060dB
Initial reception of a
signal results in an S-meter
reading of 40
dB.
The highest indicated
bar remains displayed
for about 0.5 sec.
even when the signal
strength decreases.
[EXAMPLE]:.22
4 RECEIVE AND TRANSMIT
D RF gain and squelch
D Simple band scope
The IC-706MKIIG uses the same control, [RF/SQL],
to adjust one of either the RF gain or the squelch.
[RF/SQL] adjusts either the RF gain or the squelch
depending on the operating mode selected and the
condition of the RF gain item in initial set mode (p.
51; also see the table at right).
The RF (Radio Frequency) gain is used to adjust the
receiver gain.
o This control should be set to the 11 o'clock position for
normal use.
o Shallow rotation moves the S-meter to the right indicating
the signal strength which can be received.
The SQUELCH removes noise output from the
speaker (closed condition) when no signal is
received. The squelch is particularly effective for FM.
It is also available for the other modes.
o When operating in FM, first rotate the control fully coun-terclockwise.
Then, rotate the control clockwise to the
point where the noise just disappears. This is the best
position. The squelch does not open for weak signals
when it is set too deep.
o A segment appears in the S-meter to indicate the S-meter
squelch level.
o [RF/SQL] control priority
AF RF/SQL
Max. RF gain position
RF gain
decreases
Same effect as at
the center position
AF RF/SQL
Deep Squelch
opens
S-meter squelch
threshold point Noise squelch
threshold point
This function allows you to visually "sweep" an area
surrounding the set frequency for other signals.
Detected signals are indicated graphically in the dot
matrix section of the display.
.Set a mode and frequency.
.Select G1 .
o Push [DISPLAY] 1 or 2 times if M or S appears.
o Push [MENU] one or more times to select G1 .
.Push [F-1] one or more times to select the desired
steps.
o Each dot corresponds to a step for the indicated fre-quency.
o 0.5, 1, 2, 5, 10, 20 and 100 kHz can be set for the scope
step.
.Push [F-3] to start the sweep.
o"___" (below SWP ) flashes while sweeping.
o The receive audio is muted while sweeping.
.Rotate the main dial if you want to monitor the dis-played
signals.
o The sweep marker indicates the location of the dis-played
frequency in the sweep readout.
o If the displayed frequency is outside of the sweep read-out
(determined by the sweep width), the sweep mark-er
flashes.
.Push [F-2] to return the frequency to the start of a
sweep.
o The sweep marker moves back to the center position.
1k SWP
2k SWP
2k SWP
2k SWP
___
2k SWP
Select sweep width
([F-1])
Start sweep
([F-3])
Sweep is finished
([F-3] again)
Move sweep marker
(main dial)
2k SWP
Returns to previous
frequency ([F-2])
sweep marker
Note: The recommended
position for RF gain is the
11 o'clock position since
this sets RF gain to the
max.
When set to AUTO, SQL is
active in FM/WFM/AM; RF
is active in SSB/CW/RTTY.
Note: Use the attenuator or turn OFF the preamp when
using the band scope on a band containing a lot of noise.
Initial set mode
setting
USB, LSB,
CW, RTTY AM, FM, WFM
SQL*1 SQL SQL
AUTO RF GAIN SQL
RF o SQL*2 RF/SQL RF/SQL
* 1 Default; * 2 Default for USA version..Filter variations
*Optional filter.
Optional filter installation and selection tables
SSB
23
4 RECEIVE AND TRANSMIT
D Optional filter selection
Two optional filters can be installed in the IC-706MKIIG.
Narrow filters help reject interference from adjacent
signals and obtain good selectivity.
Wide filters provide improved audio for SSB opera-tion
when no interfering signals are present.
Consult the table below to select a filter most suitable
for your operating needs.
Narrow filters for AM/FM modes are standard.
FILTER PRESETTING:
After you install a filter (see p. 60 for installation), you
must specify the installed filter in initial set mode
(item 19 "OPT. FIL 1" or item 20 "OPT. FIL 2"; see
p. 51).
FILTER ON/OFF:
.Select M3 .
oPush [DISPLAY] 1 or 2 times if G or S appears.
oPush [MENU] one or more times to select M3 .
.Push [(F-1)FIL ] momentarily to select the narrow
filter; for 2 sec. to select the wide filter.
o ã appears when the narrow filter is selected; ç
appears when the wide filter is selected.
Note: When selecting the narrow filter, the graphic
passband is narrowed (see diagram below).
Normal
operation
narrow is
selected
FL-101* CW, RTTY 250 Hz/-6 dB
CW, RTTY 350 Hz/-6 dB
CW, RTTY 500 Hz/-6 dB
SSB, CW, RTTY 2.8 kHz/-6 dB
FL-223* SSB, CW, RTTY 1.9 kHz/-6 dB
SSB, CW, RTTY 2.4 kHz/-6 dB
AM, FM 8 kHz/-6 dB
Mode Band width Name
FIL 1
FIL 2
No
optional
filter
FL-100 FL-101 FL-103 FL-223 FL-232
No
optional
filter
W:---
M:FL-272
N:---
W:---
M:FL-272
N:---
W:---
M:FL-272
N:---
W:FL-103
M:FL-272
N:---
W:---
M:FL-272
N: FL-223
W:---
M:FL-272
N:---
FL-100
W:---
M:FL-272
N:---
W:---
M:FL-272
N:---
W:---
M:FL-272
N:---
W:FL-103
M:FL-272
N:---
W:---
M:FL-272
N: FL-223
W:---
M:FL-272
N:---
FL-101
W:---
M:FL-272
N:---
W:---
M:FL-272
N:---
W:---
M:FL-272
N:---
W:FL-103
M:FL-272
N:---
W:---
M:FL-272
N: FL-223
W:---
M:FL-272
N:---
FL-103
W: FL-103
M:FL-272
N:---
W: FL-103
M:FL-272
N:---
W: FL-103
M:FL-272
N:---
W: FL-103
M:FL-272
N:---
W: FL-103
M:FL-272
N: FL-223
W: FL-103
M:FL-272
N:---
FL-223
W:---
M:FL-272
N: FL-223
W:---
M:FL-272
N: FL-223
W:---
M:FL-272
N: FL-223
W:FL-103
M:FL-272
N: FL-223
W:---
M:FL-272
N: FL-223
W:---
M:FL-272
N: FL-223
FL-232
W:---
M:FL-272
N:---
W:---
M:FL-272
N:---
W:---
M:FL-272
N:---
W: FL-103
M:FL-272
N:---
W:---
M:FL-272
N: FL-223
W:---
M:FL-272
N:---
FIL 1
FIL 2
No
optional
filter
FL-100 FL-101 FL-103 FL-223 FL-232
No
optional
filter
W:---
M:FL-272
N:---
W:---
M:FL-272
N: FL-100
W:---
M:FL-272
N: FL-101
W:FL-103
M:FL-272
N:---
W:---
M:FL-272
N: FL-223
W:---
M:FL-272
N: FL-232
FL-100
W:---
M:FL-272
N: FL-100
W:---
M:FL-272
N: FL-100
W: FL-272
M:FL-100
N: FL-101
W:FL-103
M:FL-272
N: FL-100
W:FL-272
M:FL-223
N: FL-100
W:FL-272
M:FL-100
N: FL-232
FL-101
W:---
M:FL-272
N: FL-101
W: FL-272
M:FL-100
N: FL-101
W:---
M:FL-272
N: FL-101
W:FL-103
M:FL-272
N: FL-101
W: FL-272
M:FL-223
N: FL-101
W:FL-272
M:FL-232
N: FL-101
FL-103
W: FL-103
M:FL-272
N:---
W: FL-103
M:FL-272
N: FL-100
W: FL-103
M:FL-272
N: FL-101
W: FL-103
M:FL-272
N:---
W: FL-103
M:FL-272
N: FL-223
W: FL-103
M:FL-272
N: FL-223
FL-223
W:---
M:FL-272
N: FL-223
W:FL-272
M:FL-223
N: FL-100
W:FL-272
M:FL-223
N: FL-101
W:FL-103
M:FL-272
N: FL-223
W:---
M:FL-272
N: FL-223
W:FL-272
M:FL-223
N: FL-232
FL-232
W:---
M:FL-272
N: FL-232
W: FL-272
M:FL-100
N: FL-232
W: FL-272
M:FL-232
N: FL-101
W: FL-103
M:FL-272
N: FL-232
W: FL-272
M:FL-223
N: FL-232
W:---
M:FL-272
N: FL-232
FL-100*
FL-232*
FL-94
FL-103*
FL-272
FM Normal FL-23+SFPC455E
Narrow FL-94
AM Normal FL-94
Narrow FL-272
CW, RTTY
Table key:
W-wide position
M-medium (normal) position
N-Narrow position.24
4 RECEIVE AND TRANSMIT
This function automatically attenuates beat tones,
tuning signals, etc., even if they are moving. The
automatic notch filter functions in SSB, FM and AM
modes.
.Select S4 (DSP menu).
oPush [DISPLAY] 1 or 2 times when M or G is displayed.
oPush [MENU] one or more times to select S4 .
.Push [(F-1)ANF ] to toggle the automatic notch filter
ON and OFF.
o"DSP" and "ANF" appear when the function is ON.
D NR (Noise Reduction) function
This function reduces noise components and picks
out desired signals which are buried in noise. The
received AF signals are converted to digital signals
and then the desired signals are separated from the
noise. The noise reduction function is available for all
operating modes.
.Select S4 (DSP menu).
oPush [DISPLAY] 1 or 2 times when M or G is displayed.
oPush [MENU] one or more times to select S4 .
.Push [(F-2)NR ] to toggle the noise reduction func-tion
ON and OFF.
o"DSP" and "NR" appear when the function is ON.
.Push [(F-3)NRL ] to toggle the noise reduction level
indication ON and OFF.
.Rotate the [M-CH] control to set the noise reduc-tion
level.
oSet the control for maximum readability. Deep rotation
results in audio signal masking or distortion.
NOTE:Pushing [(F-3)NRL ] automatically turns the
noise reduction function ON, however, the trans-ceiver
maintains the ON/OFF condition when
pushing [(F-2)NR ].
D ANF (Automatic Notch Filter) function
DSP Functions (may require an optional unit depending on version-see p. 61)
DSP
CH
VFO A
PO
S1
5
5 3 79204060dB
USB
BLANK
ANF
S4 ANF NR NRL
DSP
CH
VFO A
PO
S1
5
5 3 79204060dB
USB
BLANK
NR
S4 ANF NR NRL
S4 LEVEL 8 NRL.25
4 RECEIVE AND TRANSMIT
oSetting output power
.Push [DISPLAY] for 2 sec. to select quick set mode.
.Push [MENU] one or more times to select Q1 RF
POWER .
.Rotate the main dial to select the desired output.
oOutput power is displayed in 11 steps (L, 1-9 and H)
but is continuously selectable.
.Push [DISPLAY] to exit quick set mode.
oAvailable power
*Carrier power
oSetting microphone gain
Microphone gain must be adjusted properly so that
your signal does not distort when transmitted.
.Select SSB or another phone mode.
.Push [DISPLAY] for 2 sec. to select quick set mode.
.Push [MENU] one or more times to select Q2 MIC
GAIN .
oThe ALC meter is selected automatically when operat-ing
in SSB mode.
.While speaking into the microphone adjust the mic
gain so that the ALC meter does not peak past the
ALC zone.
.Push [DISPLAY] to exit quick set mode.
USB
Q1 RF POWER
Maximum output power is
selected.
PO
S1
5
5 3 792040
10
60dB
Microphone gain is
set to 6.
ALC
S1
1 23
5 3 79204060dB
USB
Q2 MIC GAIN
ALC
ALC zone
D Meter function
The bar meter in the function display acts as an
S-meter (for relative signal strength, except in WFM
mode) during receive and can be selected for one of
three types during transmit.
.Select M3 .
oPush [DISPLAY] 1 or 2 times when S or G appears.
oPush [MENU] one or more times to select M3 .
.Push [(F-3)MET ] one or more times to select the
desired meter function.
oThe display indication changes as in the table at right.
D Output power and mic gain
Functions for transmit
Note: The SWR meter cannot be used for the 144/430
MHz bands since the meter activates for the [ANT 1] con-
nector only.
BAND SSB/CW/RTTY/FM AM*
HF 5-100 W 4-40 W
50 MHz 5-100 W 4-40 W
144 MHz 2-20 W 2-8 W
DISPLAY
INDICATION MEASUREMENT
Po Indicates the relative RF output power.
ALC
Indicates the ALC level. When the
meter movement shows the input signal
level exceeds the allowable level, the
ALC limits the RF power. In such cases,
reduce the microphone gain (see
above).
SWR Indicates the SWR over the transmis-
sion line..26
4 RECEIVE AND TRANSMIT
D Speech compressor
The IC-706MKIIG has a built-in, low distortion
speech compressor circuit. This circuit increases
your average talk power in SSB mode and is espe-cially
useful for DX'ing when the receiving station is
having difficulty copying your signal.
.Select USB or LSB mode.
.Select the ALC meter.
o Push [DISPLAY] 1 or 2 times to select M , if necessary.
o Push [MENU] one or more times to select M3 , then
push [(F-3)MET ] one or more times to select "ALC."
.Select the mic gain display in quick set mode.
o Push [DISPLAY] for 2 sec.
o Push [MENU] one or more times to select Q2 MIC
GAIN .
.Adjust the mic gain.
o While transmitting at your normal voice level, the ALC
meter should read at about the middle of the ALC zone.
o Be sure the mic gain is in the range of 2 to 5.
.Select M4 .
o Push [DISPLAY] 1 or 2 times to select M , if necessary.
o Push [MENU] one or more times to select M4 .
.Push [(F-2)COM ], then adjust [COMP GAIN] so that
the ALC meter reads within the ALC zone whether
you speak softly or loudly.
Note: When the ALC meter peaks above the ALC
zone, your transmitted voice may be distorted.
[MENU] [(F-2)COM ]
[COMP GAIN]
COMP
GAIN /SIDE T
BEEP
ALC
Adjust [COMP GAIN] so that the ALC meter
reads within the ALC zone.
ALC zone
D VOX operation
The VOX (Voice-operated Transmission) function
toggles between transmit and receive with your
voice. This function provides an opportunity to input
log entries into your computer, etc., while operating.
.Select M4 , then turn the VOX function ON.
o Push [DISPLAY] 1 or 2 times when S or G appears.
o Push [MENU] one or more times to select M4 .
o Push [(F-1)VOX ] to turn the function ON.
.Select VOX GAIN in quick set mode.
o Push [DISPLAY] for 2 sec. then push [MENU] one or
more times to select Q4 .
.While speaking into the microphone, adjust [VOX
GAIN] until the transceiver is transmitting.
.Select VOX DELAY in quick set mode.
o Push [MENU] one or more times to select Q3 .
.While speaking into the microphone, adjust [VOX
DELAY] as desired.
.Select ANTI VOX in quick set mode.
o Push [MENU] one or more times to select Q5 .
.If the receive audio from the speaker toggles the
transceiver to transmit during receive, adjust the
[ANTI-VOX] to the point where it has no effect.
.Push [DISPLAY] to exit quick set mode.
[MENU] [(F-1)VOX ]
[DISPLAY]
main dial.27
4 RECEIVE AND TRANSMIT
The AT-180 automatic antenna tuner matches the IC-706MKIIG
to the connected antenna automatically.
Once the tuner matches an antenna, the variable
capacitor angles are memorized as a preset point for
each frequency range (100 kHz steps). Therefore,
when you change the frequency range, the variable
capacitors are automatically preset to the memorized
point.
Note:
o The AT-180 cannot be used for the 144/430 MHz
band.
o When operating on the 144/430 MHz band, pushing
the tuner switch selects the call channel (p. 39).
o The AT-180 can match both HF and 50 MHz bands.
However, operation is different for the HF and 50
MHz bands.
TUNER OPERATION
o For the HF band:
Push [TUNER] to turn the tuner ON. The antenna is
tuned automatically during transmission when the
antenna SWR is higher than 1.5:1.
o When the tuner is OFF, the [TUNER] light goes out.
o For the 50 MHz band:
Push and hold [TUNER] to tune the antenna. If the
[TUNER] light flashes slowly while transmitting, push
and hold [TUNER] again to re-tune the antenna.
MANUAL TUNING
During SSB operation on HF bands at low voice lev-els,
the AT-180 may not be tuned correctly. In such
cases, manual tuning is helpful.
Push and hold [TUNER] for 1 sec. to start manual
tuning.
o CW mode is selected, a side tone is emitted, and the<