Icom IC-718 User Manual

INSTRUCTION MANUAL

HF ALL BAND TRANSCEIVER

i718

IMPORTANT

WORD

R WARNING

CAUTION

NOTE

DEFINITION

Personal injury, fire hazard or electric
shock may occur.

Inconvenience only.
No risk of personal injury, fire or
electric shock.

Equipment damage may occur.

READ T H I S INSTRUCTION M A N U A L
CAREFULLY before attempting to operate the

transceiver.

SAVE THIS INSTRUCTION MANUAL. This

manual contains important saf ety and ope rating
instructions for the IC-718.

PRECAUTIONS

R WARNING HIGH VOLTAGE! NEVER

attach an antenna or internal antenna connector
during transmission. This may result in an electric
shock or burn.

R NEVER apply AC to the [DC13.8V] jack 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] jack on the transceiver
rear pa nel . This co uld cau se a fire or ruin the
transceiver.

R NEVER let metal, wire or other objects touch

any internal part or connectors on the rear panel of
the transceiver. This may result in an electric shock.

NEVER expose the transceiver to rain, snow or any

liquids.

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 (+176°F), resulting in
permanent damage to the transceiver if left there for
extended periods.

AVOID placing the transceiver in excessively dusty
environments or in direct sunlight.

EXPLICIT DEFINITIONS

During mo bil e op eration, DO N OT o per ate 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.

Ma ke sure the transceiver power is OFF b efore
starting the vehicle. This will avoid possible damage
to the transceiver by ignition voltage spikes.

During maritime mo b i l e o p e r a tion, keep th e
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
operati ng the transceiver con tinuo usly for lo ng
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-718 may
damage the transceiver.

AVOID placing the transceiver against walls or putting
anything on top of the transceiver. This will obstruct
heat dissipation.

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TABLE OF CONTENTS

1

IMPORTANT ............................................................ i

EXPLICIT DEFINITIONS .......................................... i

PRECAUTIONS ........................................................ i

1 TABLE OF CONTENTS ...................................... 1

SUPPLIED ACCESSORIES .................................... 1

2 PANEL DESCRIPTION ................................... 2–8

n Front panel ....................................................... 2

n Function display ............................................... 5

n Rear panel ........................................................ 6

n Microphone (HM-36) ........................................ 8

3 INSTALLATION AND CONNECTIONS ........ 9–14

n Unpacking ........................................................ 9

n Selecting a location .......................................... 9

n Grounding ........................................................ 9

n Antenna connection ......................................... 9

n Required connections .................................... 10

n Advanced connections ................................... 11

n Power supply connections ............................. 12

n Liner amplifier connections ............................. 13

n External antenna tuners ................................. 14

4 FREQUENCY SETTING .............................. 15–19

n When first applying power .............................. 15

n Initial setting ................................................... 15

n VFO description ............................................. 16

n Frequency setting ........................................... 17

n Dial lock function ............................................ 19

5 RECEIVE AND TRANSMIT ......................... 20–34

n Mode selection ............................................... 20

n Squelch and RF gain ...................................... 20

n Function for receive ........................................ 21

n DSP function (option) ..................................... 23

n Filter selection ................................................ 24

n Filter setting .................................................... 25

n Function for transmit ...................................... 26

n Split frequency operation ............................... 30

n SWR ............................................................... 30

n Function for CW ............................................. 31

n Function for RTTY .......................................... 33

6 MEMORY OPERATION .............................. 35–38

n Memory channels ........................................... 35

n Memory channel selection .............................. 35

n Memory channel programming ....................... 36

n Frequency transferring ................................... 37

n Memory clearing ............................................. 38

7 SCANS ........................................................ 39–40

n Scan types ..................................................... 39

n Preparation ..................................................... 39

n Programmed scan operation .......................... 40

n Memory scan operation .................................. 40

8 SET MODE .................................................. 41–47

n General .......................................................... 41

n Quick set mode items ................................ 42-43

n Initial set mode items ................................ 44-47

9 INSTALLATION AND CONNECTIONS ...... 48–51

n Opening the transceiver’s case ...................... 48

n Optional bracket and carrying handle.............. 48

n CR-338 HIGH STABILITY CRYSTAL UNIT ........ 49

n UT-102 VOICE SYNTHESIZER UNIT ................ 49

n UT-106 DSP RECEIVE UNIT ............................ 50

n Optional IF filters ............................................ 50

n AT-180 internal switch description ................. 51

10 MAINTENANCE ........................................ 52–53

n Troubleshooting ............................................. 52

n Fuse replacement .......................................... 53

n Resetting the CPU ......................................... 53

11 SPECIFICATIONS .......................................... 54

12 OPTIONS .................................................. 55–56

13 CONTROL COMMAND ............................ 57–58

n Remote jack (CI-V) information ...................... 57

14 INTERNAL VIEWS .......................................... 59

n Top view ......................................................... 59

n Bottom view .................................................... 59

15 INSTALLATION NOTES ................................. 60

n DECLARATION OF CONFORMITY ............... 61

SUPPLIED ACCESSORIES

The transceiver comes with the following accessories.

q DC power cable ................................................... 1

w Hand microphone (HM-36) ................................. 1

e Fuse (FGB 20 A; for DC cable) ........................... 1

r Fuse (FGB 4 A; internal use) .............................. 1

Qty.

1

RIT

2

MIC

IC-71 8

PHONES

RF/SQL AF

SHIFT RIT

LOCK

MODE

FIL

TS

PWR

TUNER

COMP

P.AMP

NB

ATT

SET

CH

ENT

F-INP

V/M

1

MW

4

A=B

2

M-CL

5

SCN

8

ANF

0

NR

.

A/B

3

VOX

97

SPL

M V

6

Z DN

UP Y

Speaker Function Display

@1

@0

!9 !7

!5

!4

!6

!3
!2

!0!8!1

oi

uy

tre

w

q

PANEL DESCRIPTION

n Front panel

or rotate the control counterclockwise to decrease the

q POWER SWITCH [PWR]

 Push momentarily to turn power ON.

frequency. “

• The shift frequency range is ±1.2 kHz.

” appears on the display.

• Turn the optional DC power supply ON in advance.

 Push for 1 sec. to turn power OFF.
 While pushing and holding [SET], push [PWR]

to enter the initial set mode. (p. 41)

u IF SHIFT CONTROLS [SHIFT]

(Outer control; p.

21)

Shifts the center frequency of the receivers’s IF

pass-band.

w MICROPHONE CONNECTOR [MIC]
Accepts supplied or optional microphone.

• See p. 55 for appropriate microphones.

• See p. 8 for microphone connector information.

•

Rot ate th e co ntr ol c olckw ise to s hif t the c ent er
frequency higher, or rotate the control counterclockwise
to shift the center frequency lower.

i LOCK SWITCH [LOCK] (p. 19)

e HEADPHONE JACK [PHONES] (p. 11)

Accepts headphones (8

• When headphones are connected, the internal speaker
or connected external speaker does not function.

Ω).

r AF CONTROL [AF] (inner control)
Varies the audio output level from the speaker.

t RF GAIN/SQUELCH CONTROL [RF/SQL]

(outer control; pgs. 20, 44)

Adjusts the squelch threshold level. The squelch

removes noise output from the speaker (closed
condition) when no signal is received.

• The squelch is available for all modes.

• The control can be set as the squelch plus RF gain
controls or squelch control only (RF gain is fixed at
maximum) in initial set mode.

y RIT CONTROLS [RIT] (Inner control; p. 21)
 Shifts the receive frequency without changing

the transmit frequency.

•

Rotate the control clockwise to incerase the frequency,

2

Push momentarily to turn the dial lock function ON

and OFF.

• The dial lock function electronically locks the main dial.

• When the optional UT-102

VOICE SYNTHESIZER UNIT is

installed (p. 49), push for 1 sec. to have the frequency,
etc. announced.

• UT-102 operation can be adjusted in initial set mode
(p. 46).

o MAIN DIAL

Changes the displayed frequency, selects quick/

initial set mode items, etc.

!0 PREAMP SWITCH [P.AMP] (p. 21)
Push momentarily to turn the preamp ON or OFF.

!1 CH SWITCH [CH] (p. 35)
Push momentarily to turn the memory channel

select function ON or OFF.

• [MEMO] blinks while memory channel select function is

turned on.

PANEL DESCRIPTION

2

• Push several times (or push and hold) [√ DN]/[UP ∫]

until desired memory channel appears.

• After pushing [F-INP/ENT], push desired memo ry
channel number from the keypad, then push [FINP/
ENT] again to select the memory channel directory.

• Push [CH] to exit the memory channel select function.

!2 MEMORY CHANNEL (BAND) UP/DOWN

SWITCHES [√ DN]/[UP ∫] (p. 35)

 Push one or more times to select the memory

channel, while [MEMO] indicator is blinking.
 Push to select a band.
 Push to select the quick/initial set mode items

while quick/initial set mode is selected.

!3 ATTENUATOR SWITCH [ATT] (p. 22)
Push to toggle the 20 dB attenuator function ON

and OFF.

!4 TUNER SWITCH [TUNER] (pgs. 28, 29)
 Push mo mentaril y to to ggle the a utomatic

antenna tuner function ON/OFF.

• An optional antenna tuner must be connected.

 Push for 1 sec. to manually tune the tuner.

• An optional antenna tuner must be connected.

• When the tuner cannot tune the antenna, the tuning

circuit is bypassed automatically after 20 sec.

 Push [NB] for 1 sec to enter the noise blanker

level setting condition.

!9 QUICK TUNING STEP SWITCH [TS] (pgs. 18, 19)
 Selects a quick tuning step or turns the quick

tuning step OFF.

• While the quick tuning indicator () is displayed,
the frequency can be changed in kHz step.

 While the quick tuning step is OFF, it turns the 1

Hz step ON and OFF when pushed for 1 sec.

• 1 Hz indication appears and the frequency can be
changed in 1 Hz steps.



While the kHz quick tuning step is selected, it enters
tuning step set mode when pushed for 1 sec.

@0 FILTER SWITCH [FIL] (p. 24)
 Push momentarily to toggle between the pre-

programmed normal, wide and narrow IF filters
for the selected operating mode.

@1 MODE SWITCHES [LSB/USB]/[CW/CW-R]/

[RTTY/RTTY-R]/[AM] (p. 20)

Push to toggle an operating mode.

• Push[MODE] for 1 sec. during SSB mode to toggle

between LSB or USB.

• Push [MODE] for 2 sec. during CW or RTTY mode, to

toggle between CW and CW reverse or RTTY and
RTTY reverse. “ ” appears on the display.

!5 SET SWITCH [SET]

 Push for 1 sec. to enter the quick set mode. (p.

41)

 Pushing and h olding [SET], and then p ush

[POWER] to enter the initial set mode. (p. 41)

 Push to toggle the meter function; (p. 26)

• PO: indicates the relative RF output power.

• ALC: Indicates ALC level.

• SWR: indicates the SWR over the transmission line.

!6 MIC COMPRESSOR SWITCH [COMP] (p. 27)

Toggles the Mic. compressor function ON and OFF.

!7 KEYPAD

The keypad can be used for several functions as

discribed below:

• [F-INP/ENT], keypad then [F-INP/ENT].
— Direct frequency input. (pgs. 4, 7)

•

[CH], [F-INP/ENT], keypad then [F-INP/ENT] then [V/M]

— Memory channel selection. (pgs. 4, 35)

• [V /M ], [A=B], [A/B], [M W] , [M-CL], [M
[S CA N] , [VOX], [N R] (option) and [ANF] (option)
switch. (p. 4)

≈V ], [SPL],

!8 NOISE BLANKER SWITCH [NB] (p. 22)
 Toggles the noise blanker ON and OFF. The

noise blanker reduces pulse-type noise such as
that generated by automobile ignition systems.
This function is not effective against non pulse­type noise.

3

2

ENT

F-INP

V/M

1

MW

4

A=B

2

M=CL

5

SCN

8

ANF

0

NR

.

A/B

3

VOX

97

SPL

M V

6

#1

#3 #2

#0
@9

@8
@7

@6

@3

@4

@5

@2

MODE

FILTER

TS

TUNER

COMP

P.AMP

UP

NB

ATT

SET

CH

DN

ENT

F-INP

V/M

1

MW

4

A=B

2

M=CL

5

SCN

8

ANF

0

NR

.

A/B

3

VOX

97

SPL

M V

6

Z Y

PANEL DESCRIPTION

n Front panel (continued)

4

@2 VFO/MEMORY SWITCH/1 [V/M•1] (pgs. 16, 35)
 Toggles the operating mod e b etween VFO

mode or memory mode when pushed.

@3 MEMORY WRITE SWITCH/4 [MW•4] (p. 36)
 Stores the displayed frequency and operating

mode into the selected memory channel when
pushed for 1 sec.

@4 SPLIT SWITCH/7 [SPL•7] (p. 30)
Turns the split frequency operation ON or OFF

when pushed.

@5 NR SWITCH/. [NR• . ] (p. 23)


Toggles the optional noise reduction function ON
or OFF when pushed. Functions in all modes.

• An optional UT-106 DSP UNIT is required.

• [NR] appears on the display.

 Enters noise reduction level set mode when

pushed for 1 sec.

@6 ANF SWITCH/0 [ANF•0] (p. 23)
Toggles the Automatic Notch Filter function ON or

OFF. Functions in SSB and AM modes.

• An optional UT-106 DSP UNIT is required.

• [ANF] appears on the display.

@7 FRQUENCY INPUT/ENTER SWITCH

[F-INP/ENT]

 [F-INP/ENT], then keypad then [F-INP/ENT]

— Direct frequency input. (p. 17)

 [CH] th en [F -IN P/E NT] , th en k eyp ad th en

[F-INP/ENT]. Push [CH].

— Direct memory number selection. (p. 35)

@8 SCAN SWITCH/8 [SCAN•8] (p. 39)
 Push momentarily to start/stop the programmed

scan in VFO mode.

 Push momentarily to start/stop the memory scan

in memory mode.

@9 VOX SWITCH/9 [VOX•9] (p. 27)
 Turn the VOX function ON or OFF when pushed

in SSB modes.

#0 M≈V SWITCH/6 [MV•6] (p. 37)
 Transfers the memory contents to VFO when

pushed for 1 sec.

#1 MEMORY CLEAR SWITCH/5 [M=CL•5] (p. 38)
Clears the selected readout memory c ha nn el

contents when pushed for 1 sec. in memory mode.

• [BLANK] appears above the memory channel number.

#2 VFO SELECT SWITCH/3 [A/B•3] (p. 16)
 Tog gles between VF O A or VF O B in VF O

mode.

 T o ggles b e t ween tra n smiss i on VFO and

reception VFO during split operation.

#3 VFO EQUALIZATION SWITCH/2 [A=B•2]

Equalize the frequency and operating mode of the

two VFO’s.

•

The VFO B frequency and operating mode are equalized
with the VFO A frequency and operating mode.

n Function display

!9

!6

!7

!8

o

!1!0

r

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!4
!2

!5

!3

t

q

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PANEL DESCRIPTION

2

q LOCK INDICATOR (p. 19)
Appears when the dial lock function is in use.

w RECEIVE INDICATOR
Appears while receiving a signal or when th e

squelch is open.

e TUNE INDICATOR
Appears while the automatic tuning function is

activated.

r TRANSMIT INDICATOR
Appears while transmitting.

t FUNCTION INDICATORS
 “P.AMP” appears when antenna preamp is in

use.

 “ATT” appears when the attenuator function is in

use.

 “NB” appears when the Noise Blanker function

is turned ON.

 “BK” appears when the semi break-in function is

selected in quick set mode.

 “F-BK” appears when the full break-in function

activates in CW mode. (p. 31)

 “ VOX ” ap pears wh en th e VO X function i s

selected in quick set mode.

 “COM” appears when the speech compressor

activates in SSB mode.

 “SCAN” appears when the scan function i s

activated.

• Flashes when scan is paused.

y DSP UNIT INDICATOR
Appears when an optional UT-106

installed.

DSP UNIT is

o SIGNAL/SQL/RF-GAIN METER
 Functions as an S-meter while receiving.
 Functions as a Power, ALC or SWR meter while

transmitting. (p. 26)

!0 VFO/MEMORY INDICATOR (p. 16)
“ VFO A ” or “ B” appear s whe n VFO mode is

selected.

“MEMO” appears when memory mode is selected.

!1 MEMORY CHANNEL NUMBER READOUT (p. 35)
Shows the selected memory channel number.

!2 BLANK INDICATOR (p. 38)
Shows that the displayed memory channel is not

programmed.

• This indicator appears both in VFO and memory mode.

!3 SPLIT INDICATORS (p. 30)
Appears when the split frequency operation is in

use.

!4 RIT INDICATOR (p. 21)
Appears when the RIT function is in use.

!5 FREQUENCY READOUT
Shows the operating frequency.

!6 REVERSE INDICATOR (p. 20)
Appears when the CW reverse or RTTY reverse

mode is selected.

!7

WIDE/NARROW FILTER INDICATORS (pgs. 24, 25)



“ ” appears when the wide IF filter is selected.

 “ ” a ppears w hen the nar row IF filter is

selected.

u

AUTOMATIC NOTCH FILTER INDICATOR (p. 23)

Appears when the optional Automatic Notch Filter

function is in use.

i NOISE REDUCTION INDICATOR (p. 23)
A ppear s when the optio nal Noise Reduc tion

function is in use.

!8 PROGRAMMABLE TUNING STEP INDICATORS

Appears when the programmable tuning step is

selected.

!9 MODE INDICATORS (p. 20)
Indicates the selected operating mode.

5

2

q w e

rtyuio!

0

Rear panel view

When connecting
a straight key

When connecting
a paddle

(dot)
(com)
(dash)

(⊕)

PANEL DESCRIPTION

n Rear panel

q ANTENNA TERMINAL [ANT] (p. 10)
Connects a 50

and a 50 Ω coaxial cable.

w DC POWER SOCKET [DC 13.8V] (p. 12)
Accepts 13.8V DC through the supplied DC power

cable.

e TUNER CONTROL SOCKET [TUNER] (p. 14)
Accepts the control cable from an optional AH-4

AUTOMATIC ANTENNA TUNER.

r CI-V REMOTE CONTROL JACK [REMOTE] (p. 57)
Designed for use with a personal computer for

remote operation of transceiver functions.

t EXTERNAL SPEAKER JACK [EXT SP] (p. 11)
Connects an 8

• When an external speaker is connected, the internal

y ACCESSORY SOCKET [ACC] (p. 7)
Enables connection to external equipment such as

an optional AT-180 AUTOMATIC ANTENNA TUNER,
a TNC for data communications or a liner amplifier,
etc.

Ω antenna with a PL-259 connector

Ω external speaker, if desired.

speaker does not function.

u ELECTRONIC KEYER JACK [KEY]

Accepts a paddle to activate the internal electronic

keyer.

• Selection between the internal electronic keyer and

straight key operation can be made in initial set mode.

i ALC INPUT JACK [ALC]

Connects to the ALC output jack of a non-Icom

linear amplifier.

o SEND CONTROL JACK [SEND] (p. 14)
G oes to g round while tr ansmitting to control

external equipments such as a liner amplifier.

• Max. control level: 16 V DC/2 A

!0 GROUND TERMINAL [GND] (p. 9)
Connects the terminal to ground.

6

D ACC SOCKET 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 SEND

Input/output pin.
Goes to ground when transmitting.
When grounded, transmits.

Ground level : –0.5 V to 0.8 V
Input current : Less than 20 mA 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 kΩ

blue

7 NC 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.

Ground level : –0.5 to 0.8 V
Input current : Less than 10 mA

black

11 MOD Modulator input.

Input impedance :10 kΩ
Input level : Approx. 100 mV

rms

pink

12 AF

AF detector output.
Fixed, regardless of [AF] position.

Output impedance : 4.7 kΩ
Output level : 100 to 300 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 2 3 4

8765

9

10 11 12

13

ACC 1

ACC 2

q FSKK t AF
w GND y SQLS

e SEND u 13.8 V
r MOD i ALC

q 8 V t ALC
w GND y NC

e SEND u 13.8 V
r BAND

1122334

4

8877665

5

9

10 11 12

13

1

2

3

4

76

5

• ACC socket

PANEL DESCRIPTION

2

• When connecting the ACC conversion cable (OPC-599)

7

2

q

w

y GND (PTT ground)

t PTT

r Main readout squelch switch

q Microphone input

w +8 V DC output

e Frequency up/down

u GND

(Microphone ground)

i Main readout AF output

(varies with [AF]/[BAL])

Max. 10 mA

Ground

Ground through 470 Ω

“LOW” level

“HIGH” level

+8 V DC output

Frequency up

Frequency down

Squelch open

Squelch closed

[MIC]

PIN NO.

w

e

r

FUNCTION DESCRIPTION

+

+

q

w

ert

y

u

i

4700p

4700p

10µ

0.33µ

MICROPHONE

MIC
ELEMENT

2k

470

DOWN UP

PTT

RECEIVE

TRANSMIT

MICROPHONE CABLE MICROPHONE PLUG

PANEL DESCRIPTION

n Microphone (HM-36)

q UP/DOWN SWITCHES [UP]/[DN]

Change the selected readout frequency or memory

channel.

• Continuous pushing changes the frequency or memory
channel number continuously.

• Th e [UP] /[DN] sw itch c an simul ate a key p addle.
Preset in the CW PADDL in initial set mode. (p. 31)

• MICROPHONE CONNECTOR

(Front view)

w PTT SWITCH

Push and hold to transmit; release to receive.

CAUTION: DO NOT short pin 2 to ground as this

can damage the internal 8 V regulator.

• HM-36 SCHEMATIC DIAGRAM

8

INSTALLATION AND CONNECTIONS

30 mm

10 mm (soft solder)

10 mm

1–2 mm

solder solder

Soft
solder

Coupling ring

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
conductor.

q

w

e

r

3

n Unpacking

After unpacking, immediately report any damage to the
delivering carrier or dealer. Keep the shipping cartons.

For a des cri pti on and a di agra m of acce sso ry
equipment included with the IC-718, see ‘Supplied
accessories’ on p. 1 of this manual.

n Selecting a location

Se le ct a location for the transceiver that allows
adequate air circulation, free from extreme heat, cold,
or vibrations, and away from TV sets, TV antenna
elements, radios and other electro-magnetic sources.

The base of the transceiver has an adjustable stand
for desktop use. Set the stand to one of two angles
depending on your operating conditions.

n Antenna connection

For radio communications, the antenna is of critical
importance, along with output power and sensitivity.
Select antenna(s), such as a well-matche d 50 Ω
antenna, and feedline. 1. 5:1 or better of V olt age
Standing Wave Ratio (VSWR) is recommended for your
desired band. Of course, the transmission line should be
a coaxial cable.

CAUTIO N : Pr otec t your t ran s ceiv er fro m

lightning by using a lightning arrestor.

PL-259 CONNECTOR INSTALLATION EXAMPLE

n Grounding

To prevent electrical shock, television interference
(TV I), b road cast inte rfe renc e (BC I) and othe r
pro blem s, gr ound the t rans ceiv er th roug h 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 [GND] terminal and ground as short as
possible.

R WARNING: NEVER connect th e

[GND] terminal to a gas or electric pipe, since the
connection could cause an explosion or electric
shock.

30 mm ≈ 9⁄8 in　10 mm ≈ 3⁄8 in　1–2 mm ≈ 1⁄16 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 po wer dro ps t o pr ote ct t he f ina l
transistor. In this case, an 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-718 has an SWR meter to
monitor the antenna SWR continuously

.

9

3

MIC

i718

PHONES

RF/SQL AF

SHIFT RIT

LOCK

MODE

FIL

TS

PWR

TUNER

Y

Z

COMP

P.AMP

UP

NB

ATT

SET

CH

DN

ENT

F-INP

V/M

1

MW

4

A=B

2

M-CL

5

SCN

8

ANF

0

NR

.

A/B

3

VOX

97

SPL

M V

6

MICROPHONES (p. 55)

SM-20HM-36

GROUND (p. 9)

Use the heaviest gauge wire
or strap available and make
the connection as short as
possible.

Grounding prevents electrical
shocks, TVI and other
problems.

ANTENNA (p. 56)
[Example]: 1.8–30 MHz bands

DC POWER SUPPLY

PS-85

CW KEY

A straight key can be used when the
internal electronic keyer is turned
OFF in “CW PADDL” in initial set
mode. (p. 31)

a

pp

ro

x.

24

.5

m

;

8

0

.3

ft

AH-710

INSTALLATION AND CONNECTIONS

n Required connections

• Front panel

• Rear panel

10

n Advanced connections

MIC

IC-718

PHONES

RF/SQL AF

SHIFT RIT

LOCK

MODE

FIL

TS

PWR

TUNER

Y

Z

COMP

P.AMP

UP

NB

ATT

SET

CH

DN

ENT

F-INP

V/M

1

MW

4

A=B

2

M-CL

5

SCN

8

ANF

0

NR

.

A/B

3

VOX

97

SPL

M V

6

MIC

The AFSK modulation signal can be
input from [MIC]. (p. 33)

HEADPHONES

ANTENNA (p. 13)
Connects a liner amprifier, etc.

[REMOTE] (p. 57)
Used for computer control and transceive operation.

[SEND], [ALC]
(p. 14)
Used for connecting a
non-Icom linear ampli­fier.

EXTERNAL SPEAKER (p. 55)

SP-21, etc

ACC SOCKETS (p. 7)

AH-4 (p. 55)

AH-2b

or long wire

with

• Front panel

INSTALLATION AND CONNECTIONS

3

• Rear panel

11

3

12 V
battery

Supplied
DC power cable

+ red

_ black

Crimp

Solder

Grommet

Fuses

1 2 3 4

8765

9

10 11 12

13

1 2 3 4

8765

9

10 11 12

13

PS-85

Connect to an AC outlet
using the supplied AC cable.

DC power cable

DC power
socket

DC power
socket

DC power supply

AC outlet

AC cable

20 A fuses

Supplied
DC power cable

13.8 V 20 A

_

+

black

red

+

_

1 2 3 4

8765

9

10 11 12

13

PS-85

Connect to an AC outlet
using the supplied AC cable.

DC power cable

DC power
socket

INSTALLATION AND CONNECTIONS

n Power supply connections

Use an optional PS-85 DC POWER SUPPLY when
operating the IC-718 with AC power. Refer to the
diagrams below.

CONNECTING PS-85 DC POWER SUPPLY

CAUTION: Before connecting the DC power

cable, check the following important items. Make
sure:

• The [POWER] switch is OFF.

• Output voltage of the power source is 12–15 V
when you use a non-Icom power supply.

• DC power cable polarity is correct.

Red : positive + terminal
Black : negative

_ terminal

CONNECTING NON-ICOM DC POWER SUPPLY

CONNECTING A VEHICLE BATTERY

NEVER connect to

a 24 V battery.

NOTE: Use terminals for
the cable connections.

12

NEVER connect to a battery without supplied DC fuses,

otherwise the fire hazard may occur.

n Linear amplifier connections

1 2 3 4

8765

9

10 11 12

13

ANT

ACC-1

ACC

REMOTE

REMOTE

INPUT1

GND

GND

IC-PW1

IC-718

Ground

AC outlet

(Non-European versions : 100–120/220–240 V
European version : 230 V)

Coaxial cable

(supplied with the IC-PW1)

ACC cable

(supplied with the IC-PW1)

Remote control cable

(supplied with the IC-PW1)

To an
antenna

EXCITER
1 1&2

OPC-599 conversion cable
(option)

1 2 3 4

8765

9

1011 12

13

IC-718

Ground

IC-4KL

Remote

controller

Coaxial cable

(supplied with the IC-4KL)

ACC cable

(supplied with the IC-4KL)

ACC

IC-4KL

Remote control cable

(supplied with the IC-4KL)

AC outlet

(220–240 V)

To an
antenna

ANT

ACC

OPC-599 conversion cable
(option)

CONNECTING THE IC-PW1

INSTALLATION AND CONNECTIONS

3

CONNECTING THE IC-4KL

13

3

1 2 3 4

8765

9

10 11 12

13

RF OUTPUT RF INPUT

ALC

SEND

50 Ω coaxial cable

IC-718

ANT

ALC

SEND

To an
antenna

Non-Icom linear amplifier

Coaxial cable (from the AH-4)

Long wire or optional AH-2b

Ground

IC-718

AH-4

Control cable

Ground

1 2 3 4

8765

9

10 11 12

13

Ground

HF
antenna

[ANT]

[ACC]

[ACC]AT-180

ACC cable supplied with the AT-180

Coaxial cable supplied
with the AT-180

IC-718

one of two
connectors

INSTALLATION AND CONNECTIONS

CONNECTING A NON-ICOM LINER AMPLIFIER

R WARNING:

Set the transceiver output

power and linear amplifier
ALC output level referring
t o t h e li n e ar am p l if i e r
instruction manual.

The AL C input lev el must

be in the range 0 V to –4 V,
and the transceiver does not
accept positive voltage. Non­matched ALC and RF power
settings could cause a fire or
ruin the linear amplifier.

n External antenna tuners

The specifications for the SEND relay are 16 V

DC 2 A. If this level is exceeded, a large external
relay must be used.

CONNECTING THE AH-4 (p. 29)

CONNECTING THE AT-180 (p. 28)

DO NOT! connect AT-180 and AH-4 at the same

time. Both tuners will not function correctly.

Turn the IC-718’s power OFF when connecting
the AT-180, otherwise, the CPU may malfunction
and the AT-180 may not function properly.

14

FREQUENCY SETTING

[PWR]

[Z]

[Y]

[METER]: Po

[LOCK]: OFF

[POWER]: OFF

[P.AMP], [ATT],:
OFF

[RIT]: Center
[IF SHIFT]: Center

[AF]: Max. CCW

[RF/SQL]: 12 o'clock

[NB], [COMP]:
OFF

RIT

n When first applying power (CPU resetting)

B e f o r e fi rst a p plyi n g powe r , mak e s ure a l l
connections required for your system are complete
by referring to Chapter 3. Then, reset the transceiver
using the following procedure.

Resetting CLEARS all programmed contents in

memory channels and returns programmed values
in quick/initial set mode to default values.

q Make sure the transceiver power is OFF.
w While pushing and holding [∫ UP] and [√ DN],

push [PWR] for 1 sec. to turn power ON.

• The internal CPU is reset.

• The transceiver displays its initial VFO frequencies
when resetting is complete.

e All quick/initial set mode settings are returned to

default values. (p. 41)

Under cooler temperatures, the LCD may appear

dark and unstable after turning power ON. This is
no rm al and does not indicate any equipment
malfunction.

4

n Initial settings

After resetting the tr an sc ei ve r, set controls and
switches as shown in the figure below.

CCW : counterclockwise

Turn power ON, then check the display. If any of the
following indicators appear, turn them OFF as follows:

• Quick tuning step indicator “Z” : Push [TS].

• 1 Hz frequency readout :

• RIT indicator “

• Split indicator “ ” : Push [SPL].

” : Center.

Push [TS] for 1 sec.

( wh il e quic k t uning

step is OFF)

15

4

VFO is selected.

The frequency
is changed.

Memory mode
is selected.

VFO is selected
again.

Memory channel 1
is selected.

The frequency
is changed.

Another memory
channel is selected.

Memory channel 1
is selected again.

Changed frequency (14.123 MHz) does not appear and
memorized frequency (14.100 MHz) appears instead.

Changed frequency (14.123 MHz) appears.

FREQUENCY SETTING

n VFO description

VFO is an ab bre via tio n of Var iab le F req uen cy
Oscillator, and traditionally refers to an oscillator.

The IC-7 18 VFO ca n stor e a fre quenc y and a n
operating mode.

You can call up a desired frequency to the VFO with
the keypad or the memory transfer function (see p. 37).
You can also change the frequency with the tuning dial
and select the operating mode with the [MODE] switch
or call up previously accessed frequency and modes
with the band stacking register (p. 18).

The IC-718 has two VFOs, specially suited for split
frequency opration. The VFOs are called VFO A and
VFO B. You can call up the desired VFO.

• Differences between VFO mode 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
new operating mode.

Whe n th e VF O is selected fr om a not her VFO
or me mory mode, the last-used fr equency and
operating mode for that VFO appears.

[EXAMPLE]

MEMORY MODE (pgs. 35–38)

Ea ch memory chann el shows a frequen cy and
operating mode like a VFO. Even if the frequency
or mode is changed, the memory channel does not
memorize the new frequency or operating mode.

When the memory channel is selected from another
memory channel or VFO mode, the m emorized
frequency and operating mode appear.

[EXAMPLE]

16

•To set to 21.025 MHz

•To set to 706 KHz (0.706 MHz)

•To set to 7 MHz

•To change 14.195 to 14.850 MHz

•Start

ENT

F-INP

V/M

1

NR

ANF

0

A=B

2

M=CL

5

ENT

F-INP

A=B

2

NR

7

SPL

ANF

0

M V

6

ENT

F-INP

ANF

0

ENT

F-INP

7

SPL

ENT

F-INP

SCN

8

M=CL

5

NR

n Frequency setting

FREQUENCY SETTING

4

D Using the tuning dial

q Push [∫ UP] or [√ DN] one or more times to

select the desired ham band.

w Select the desired operating mode with the mode

switch. (p. 20).

e Rotate the tuning dial to set the desired frequency

D Direct frequency entry with keypad

The transceiver has a keypad for direct frequency
entry as described below.

q Push [F-INP/ENT], then push the numeral keys

on the keypad to enter the MHz digits for the
desired frequency.

• If a key is mistakenly pushed, push [SET] (or any key
except keypad) and start again from the beginning.

• When entering the same MHz digits as the displayed
frequency, this step can be skipped.

[EXAMPLE]

• For general coverage receiver use

The IC-718 has a general coverage receiver band.
q Push [∫ UP] or [√ DN] one or more times to

select the general coverage receiver band.

Note: Even if you select the ham band, you can set the
transceiver to the general coverage frequency. When
the displayed frequency exits the transmit frequency
range (ham band), a band edge beep may be emitted
(depends on initial set mode programming).

w Push [•] on the keypad.
e Push the numeral keys to enter the frequency

digits below 1 MHz.

• If a key is mistakenly pushed, push [SET] (or any key
except keypad) and start again from the beginning.

r Push [F-INP/ENT] to set the input frequency.

•

When pushing [F- INP/ENT] after entering the MHz
digits, zeros are automatically entered for the kHz digits.

17

4

Programmable tuning
step indicator

10 KHz tuning steps is
selected.

DN

UP

General (new)

General (old)

Y

Z

BAND BAND BAND

1.9 MHz

1.91000 MHz CW

3.5 MHz 3.55000 MHz LSB

7 MHz

7.05000 MHz LSB

10 MHz 10.12000 MHz CW

14 MHz 14.10000 MHz USB

General 15.10000 MHz USB

BAND BAND BAND

18 MHz

18.10000 MHz USB

21 MHz 21.20000 MHz USB

24 MHz

24.95000 MHz

USB

28 MHz 28.50000 MHz USB

29 MHz 29.50000 MHz USB

FREQUENCY SETTING

D Band stacking resister

The band stacking register automatically stores the
last frequency and mode used for each band. This
is convenient for contest operation, etc. The tables
below shows the band stacking register default
settings for each band.

D Band selection

All HF ham bands and a general coverage receiver
band are included in the IC-718.

Push [∫ UP]/[√ DN] to select the desired band.

• Pushing [∫ UP]/[√ DN] continuously scrolls through the

available bands.

Note: For example, if 6.10000 MHz is resistered as
the General coverage frequency, then the General
coverage band automatically positions itself between

3.5 MHz and 7 MHz band.

D Programmable tuning steps

Programmable tuning steps are available to suit your
operating requirements.
These tuning steps are:

• Selectable from 0.1, 1, 5, 9, 10, 100 kHz

q

Push [TS], the programmable tuning step indicator,
“,” then appears above the 1 kHz.

• Ro ta ting th e tun in g dial changes the frequency
according to the set tuning step.

w Push [TS] for 2 sec. while the programmable

tuning step indicator appears to enter the tuning
step set mode.

e Rotate the tuning dial to set the desired tuning

step.

r Push [TS] to exit the tuning step set mode.
t Rotate the tuning dial to change the frequency

according to the set tuning step.

18

10 Hz tuning

1 Hz tuning

momentarily

1 sec.1 sec.

1 sec.

Programmable step tuning
(100 Hz –100 kHz)

Selectable for each mode.

momentarily

“LOCK” appears while the lock
function is activated.

D 1 Hz and 10 Hz tuning steps

TS

Rotating the tuning dial
changes the frequency
in 10 Hz steps.

Rotating the tuning dial
changes the frequency
in 1 Hz steps.

Push for 1 sec.

When the programmable tuning step, “,” disappear,
rotating the tuning dial changes the frequency in
increments of 1 or 10 Hz.

q

Push [TS] one or more times until the programmable
tuning step indicator “” disappears.

w Push [TS] for 1 sec. to toggle between the 1 and

10 Hz step settings.

• When the 1 Hz step i s s el ected, the 1 H z d ig it
appears in the frequency indication; when the 10 Hz
step is selected, the 1 Hz digit disappears from the
frequency indication.

[TS] SWITCH FLOW CHART

FREQUENCY SETTING

4

n Dial lock function

The dial lock function prevents accidental changes
cau s ed by th e tuni n g dia l . The l ock fun ctio n
electronically locks the dial.

Push [LOCK] momentarily to toggle the lock function
ON and OFF.

• “LOCK” appears in the function display while the lock

function is activated.

19

5

OPERATING MODE SELECTION

Push
momentarily

Push

for 1 sec.

USB LSB

CW CW

RTTY RTTY

AM

MODE

MODE

Set mode

setting

USB, LSB,
CW, RTTY

AM

At (AUTO)

RF GAIN SQL*

Sq (SQL)

rS (RF/SQL)

(default)

SQL*

RF/SQL

RF/SQL

SQL*

Minimum RF gain

Adjustable range

RF gain adjustable
range

Maximum RF gain

Maximum RF gain

Squelch is open.

S-meter squelch

S-meter squelch
threshold

Shallow Deep

Squelch is open.

S-meter squelch

S-meter squelch
threshold

RECEIVE AND TRANSMIT

n Mode selection

The following modes are available in the IC-718:
SSB (LSB/USB), CW, CW REV (CW reverse), RTTY,
RTTY REV (RTTY reverse) and AM.

 Push [MODE] one or more times to select desired

operation mode.

 Push [MODE] for 1 sec. to toggle between USB

and LSB. (SSB mode only)

 Push [MODE] for 1 sec. to toggle between CW

and CW reverse or RTTY and RTTY reverse. (CW
and RTTY mode only)

• The selected mode is indicated in the function display.

Note: If desired mode cannot be selected, it’s use
may inhibited by initial set mode. (p. 44)

n RF gain and Squelch

The IC-718 uses the same control, [RF/SQL], to
adjust 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/SQL item in initiaset mode (p. 44).

OPERATING MODE SELECTION

• When set as the [RF/SQL] control

• [RF/SQL] control priority

* The RF gain is set to maximum level when the [RF/SQL]

is set as [SQL] control.

The RF (Radio Frequency) gain is used to adjust the
receiver gain.

• Shallow rotation moves the S-meter to the right indicating
the signal strength which can be received.

The recommended position for RF gain is the 12

o’clock position since this sets RF gain to the max.

The SQU ELC H remove s no ise output f rom the
speaker (closed condition) when no signal is received.
The squelch is available for the other modes.

• A segment appear s in the S-meter to indicat e the
S-meter squelch level.

• When set as the [SQL] control

• When set as the [RF] control

20

n Function for receive

SHIFT

SHIFTSHIFT

IF center frequency

Interference

Desired signal

Passband

Both controls at
center position

Cutting a lower
passband

Cutting higher
passbands

Interference

Desired signal

Passband

RIT

RIT

RIT off position

Appears when the
preamp ON.

ï IF shift function

RECEIVE AND TRANSMIT

5

The IF shi ft functi on e lectroni cally nar row s the
passband 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 SSB/CW/RTTY modes
and up ±250 Hz in CW-narrow/RTTY narrow modes.
The IF shift is not available in AM mode.

IF SHIFT OPERATION EXAMPLE

• Adj ust t he [S HIFT ] con tro l for a min imum
interference signal level.

• When IF shift is used, the audio tone may be
changed.

• Set the IF shift control to its center position when
there is no interference.

ï RIT function

The RIT (Receive Incremental Tuning) function
compensates for off-frequencies of communicating
stations. The function shifts the receive frequency up
to 1.2 KHz without moving the transmit frequency.

q R o t a t e t h e R I T c o n t r ol t o c a n c el t h e o f f-

frequencies.

• “

• The transmit frequencies are not shifted.

ï Preamp

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.

 Push [P.AMP] to toggle between preamp or turn

the preamp OFF.

• Preamp functions below 1.59999 MHz, but sensitivity

” appears on the display.

may reduce in some cases.

w T o ca n c e l t h e R I T

function, rotate the RIT
control t o th e center
position.

• “

” disappears.

21

5

Appears when the
attenuator ON.

Initial reception of a signal
results in an S-meter reading
of 40 dB.

The highest indicated bar
remains displayed for 0.5 sec.
even when the signal strength
decreases.

Y

Y

[NB] switch

RECEIVE AND TRANSMIT

ï Attenuator

The attenuator prevents desired signals from distorting
whe n ver y stro ng si gnal s are n ear t he des ired
frequency or when very strong electric fields, such as
from broadcasting stations, are near your location.

 Push [ATT] to toggle the 20 dB attenuator function

ON and OFF.

• “ATT” appears when the attenuator is turned ON.

ï Noise blanker

The noise blanker reduces pulse-type noise such as
that generated by automobile ignition systems.
q Push the [NB] switch to turn the noise blanker ON

or OFF.

w Push the [NB] for 1 sec. to enter the noise blanker

level setting condition.

e Rotate the tuning dial to adjust the noise blanker

level.

r Push [NB] to exit the setting condition.
t Push [NB] again to turn the noise blanker function

OFF.

• [NB] indicator disappears.

• When using the noise blanker, received signals

may be distorted if they are excessively strong.

• The noise blanker function in AM mode can
be deactivated depending on initial set mode
setting. (p. 45)

ï Peak meter hold

The peak meter hold function freezes the highest
displayed 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 (p. 45).

22

Unwanted tone
frequency

Desired
signal (AF)

Desired
signal (AF)

Particular frequency
is attenuated

Auto notch OFF Auto notch ON

n DSP function (Requires an optional UT-106 DSP UNIT)

Noise reduction OFF Noise reduction activated

Desired
signal (CW)

Noise components

ï NR (Noise reduction) function

RECEIVE AND TRANSMIT

5

When an optional UT-106 is installed (DSP appears
in the function display), noise reduction function can
be used.

The nois e r e ducti o n f uncti o n r educe s n o ise
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.

q Push [NR] to turn the noise reduction ON.

• [NR] indicator appears.

w Push [NR] for 1 sec. to enter the noise reduction

level setting condition.

e R o tate t h e t unin g d ial to a djus t t h e nois e

reduction level.

r Push [NR] to exit the setting condition.
t Push [NR] again to turn the noise reduction OFF.

• [NR] indicator disappears.

• Noise reduction example

Higher setting of the [NR] level results in audio

signal masking or distortion. Set the [NR] level for
maximum clarity. The noise reduction function is
available in all modes.

ï ANF (Automatic Notch Filter) function

When an optional UT-106 is installed (DSP appears
in the function display), an auto notch function can
be used.

The function automatically attenuates more than
3 beat tones, tuning signals, etc., even if they are
moving.

The auto notch functions in SSB mode only.

q Select SSB mode.
w Push [ANF] to turn the auto notch function ON.

• [ANF] indicator appears.

e Push [ANF] again to cancel the function.

• [ANF] indicator disappears.

23

5

FL-65 (2.4 kHz)*

FL-257 (3.3 kHz)**

FL-96 (2.8 kHz)**
FL-222 (1.8 kHz)**
FL-52A (500 Hz)**
FL-53A (250 Hz)**

2nd IF signal

2nd IF signal/DET

455 kHz IF filter

CFWS450HT (6 kHz)***

Through

* AM; Narrow,
SSB/CW/RTTY; Normal

*** AM; Normal,
SSB/CW/RTTY; Wide

** OPTION

no FL-52A FL-53A FL-96 FL-222 FL-257

SSB

WIDE 6 K* 6 K* 6 K*

6 K*

6 K*

6 K*

NORMAL 2.4 K 2.4 K 2.4 K 2.4 K 2.4 K 2.4 K

NARROW 500* 250* 1.8 K

CW

WIDE 6 K* 6 K* 6 K*

6 K*

6 K*

6 K*

NORMAL 2.4 K 2.4 K 2.4 K 2.4 K 2.4 K 2.4 K

NARROW 500 250 1.8 K

RTTY

WIDE 6 K* 6 K* 6 K*

6 K*

6 K*

6 K*

NORMAL 2.4 K 2.4 K 2.4 K 2.4 K 2.4 K 2.4 K

NARROW 500 250 1.8 K

AM

WIDE

NORMAL 6 K 6 K 6 K 6 K 6 K 6 K

NARROW 2.4 K

2.4 K 2.4 K 2.4 K 2.4 K 2.4 K
500* 250* 2.8 K* 1.8 K* 3.3 K*

2.8 K

2.8 K

2.8 K

( Hz )

3.3 K

3.3 K

3.3 K

Note: *This selection can be used when the expanded filter
selection function is turned on in the initial set mode. (see right)

RECEIVE AND TRANSMIT

n Filter selection

The filter selection switches the IF passband width
as shown in the table at right.

The filter selection is automatically memorized in
each mode.

q Select the desired mode with the mode switches.
w Push [FIL] one or more times to select the desired

filter combination.

•

ã or ç does not appear while in normal IF filter mode.

• ç appears when the wide IF filter is selected.

•

ã appears when the narrow IF filter is selected.

When an optional filter is installed, set the optional

filter in initial set mode. An optional filter is not
selected by default.

• Filter construction

• Optional filter variations

Name

FL-52A

FL-53A

FL-96

FL-222

FL-257

Band width

500 Hz/-6dB

250 Hz/-6dB

2.8 KHz/-6dB

1.8 KHz/-6dB

3.3 KHz/-6dB

Mode

CW/RTTY-N

CW/RTTY-N

SSB-W

SSB-N

SSB-W

• Filter selection table

24

n Filter setting

no FL-52A FL-53A FL-96 FL-222 FL-257

SSB

no no no 96 (2.8 K) no 257(3.3 k)

THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K)

CW

no no no 96 (2.8 K) no

257(3.3 k)

THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K)

RTTY

no no no 96 (2.8 K) no

257(3.3 k)

THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K)

AM

– – – – – – – – – – – – – – – – – –

no FL-52A FL-53A FL-96 FL-222 FL-257

SSB

– – – no no – – –

222 (1.8 K)

– – –

52A (500) 53A (250)

CW

– – – 52A (500) 53A (250) – – – 222 (1.8 K) – – –

RTTY

– – – 52A (500) 53A (250) – – – 222 (1.8 K) – – –

AM

NOR (2.4 K)

52A (500)

53A (250)

96 (2.8 K) 222 (1.8 K) 257 (3.3 K)

NOR (2.4 K)

NOR (2.4 K)

NOR (2.4 K)

NOR (2.4 K)

NOR (2.4 K)

: default

: default

no FL-52A FL-53A FL-96 FL-222 FL-257

SSB

no no no 96 (2.8 K) no 257(3.3 k)

THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K)

CW

no no no 96 (2.8 K) no

257(3.3 k)

THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K)

RTTY

no no no 96 (2.8 K) no

257(3.3 k)

THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K) THU (6 K)

AM

– – – – – – – – – – – – – – – – – –

: default

RECEIVE AND TRANSMIT

5

When an optional filter is installed, set the optional
filters in initial set mode. Optional filters are not
selected by default. (p. 47)

D Optional filter setting

q While pushing and holding [SET], push [POWER]

to enter initial set mode.

w Push [UP Y] or [Z DN] one or more times until

“FIL” appears on the display.

e Rotate the tuning dial to select the installed filter.

• “no,” “52A,” “53A,” “96,” “222” and “257” indicate no
optional filter, FL-52A, FL-53A, FL-96, FL-222 and
FL-257, indicate respectively for 455 kHz IF filter
selection.

r Push [PWR] to exit initial set mode.

D Expanded filter selection

The selectable filter combinations can be expanded
by setting the expanded filter selection to ON. Then
extra wide or narrow filter can be selected on desired
mode.

q While pushing and holding [SET], push [PWR] to

enter initial set mode.

w Push [UP Y] or [Z DN] one or more times until

“EXP FIL” appears.

e Rotate the tuning dial to turn the expanded filter

selection ‘on’.

• If ‘on’ is selected, the expanded filter selection can be

• Wide/narrow filter selecting

r Push [UP Y] one or more times

t Push [MODE] one or more times

y Rotate the tuning dial to select a

u Repeat steps t and y to select

• The filter combinations are stored

i Push [POWER] to exit initial set

used.

until “WIDE ” or “NAR ”
appears on the display.

to select the desired mode.

• Wide filter setting table

filter.

IF fi lters f o r other m o d es, if
desired.

depending on operating modes.

• Narrow filter setting table

mode.

• Optional filter selection

• Expanded filter selection “on”

• Wide filter setting

• Narrow filter setting

25

5

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 transmis­sion line.

ALC zone

RECEIVE AND TRANSMIT

n Function for transmit

ï Output power and microphone gain

• Setting output power

q Push [SET] for 1 sec. to select quick set mode.
w Push [∫ UP]/[√ DN] one or more times to select

“RF Power”.

e Rotate the main dial to select the desired output.

• Output power is displayed in 101 steps (L, 1–99 and
H) but is continuously selectable.

• Available power

SSB/CW/RTTY: 2 (or less) –100 W
AM : 2 (or less) –40 W*
*Carrier power

• Setting microphone gain

Microphone gain must be adjusted properly so that
your signal does not distort when transmitted.

q Select SSB or another phone mode.
w Push [SET] for 1 sec. to enter the quick set mode.
e Push [∫ UP]/[√ DN] one or more times to select

“MIC GAIN”.

r When speaking into the microphone adjust the

mic gain so that the ALC meter does not peak
past the ALC zone.

t Push [SET] to exit quick set mode.

Maximum output
power is selected.

Microphone gain is
set to 50.

ï Meter function

26

The bar meter in the function display acts as an
S-meter (for relative signal strength) during receive
and can be selected for one of three functions during
transmit.

• Push [SET] one or more times to select the PO,

ALC and SWR meter mode.

Y

Y

[COMP] switch

ï Microphone compressor

Adjust [MIC GAIN] so that the ALC
meter reads within the ALC zone.

ALC zone

Y

Y

[VOX] switch

IC-718 has a built-in, low distortion Mic compressor
circuit. This circuit increases your average talk power
in SSB mode and is especially useful for DX’ing
when the receiving station is having difficulty copying
your signal.

q Selecting USB or LSB mode.
w Select the mic gain display in quick set mode.

• Push [SET] for 1 sec. to select quick set mode.

• Push [

e Adjust the mic gain by rotating the main [DIAL].

•

• Be sure the mic gain is in the range of 20 to 50.

r Push [SET] to exit the quick set mode.
t Push [COMP] to turn mic compressor ON.
y Push [SET] one or more times to select the ALC

meter.

u While speaking into the microphone at a normal

voice level, confirm the ALC level so that the ALC
meter peak does not past the ALC zone.

• If the ALC meter peak past the ALC zone, re-adjust

∫ UP]/[√ DN] one or more times to select “MIC

GAIN”.

While transmitting at your normal voice level, the ALC
meter should read at about the middle of the ALC zone.

the mic. gain.

RECEIVE AND TRANSMIT

5

Note: When the ALC meter peaks above the ALC

zone, your transmited voice may be distorted.

ï 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.

q Push [VOX] to turn the function ON.
w Select “VOX Gain” in quick set mode.

• Push [SET] for 1 sec. to select quick set mode.

• Push [

e While speaking into the microphone, adjust [VOX

GAIN] until the transceiver is transmitting.

r Select “VOX Delay” in quick set mode.

• Push [∫ UP]/[√ DN] one or more times to select

t While speaking into the microphone, adjust [VOX

DELAY] as desired.

y Select “ANTI-VOX” in quick set mode.

• Push [∫ UP]/[√ DN] one or more times to select “AN

u 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.

i Push [SET] to exit the quick set mode.

∫ UP]/[√ DN] one or more times to select

“VOX GAIN”

“VOX Delay”

VOX”

27

5

Y

Y

[TUNER]

Y

Y

[TUNER]

Tuning indicator;

RECEIVE AND TRANSMIT

ï Optional AT-180 AUTOMATIC ANTENNA TUNER operation

The AT-180 automatic antenna tuner matches the
IC-718 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.

CAUTION: NEVER transmit with the tuner ON

when no antenna is connected. This will be damage
both the transceiver and the antenna tuner.

DO NOT! connect the AT-180 and AH-4 at

the same time. Both turners will not be function
correctly.

TUNER OPERATION

• Tuner type setting (p.46)

q Push [PWR] for 1 sec. to turn power OFF.
w While pushing and holding [SET], push [PWR] to

turn power ON.

e Push [UP Y] or [Z DN] one or more times to

select [TUNER].

r Rotate the main dial to select “18”.

• AT-180 AUTOMATIC ANTENNA TUNER is selected.

NOT E: N EVE R select “4” (AH-4 AU TOM ATIC

ANTEN NA TUNER ), o the rwise t he t ransceiver

transmits automatically when turning the power ON.
Push [TUNER] to cancel unexpected tramsmission.
Then, re-select the tuner type correctly.

y Push [PWR] for 1 sec. to turn power OFF.
u Push [PWR] to turn power ON again.

• AUTO TUNE:

Push [TUNER] to turn the tuner ON. The antenna is
tuned automatically during transmission when the
antenna SWR is higher than 1.5:1.

• When the tuner is OFF, “ ” goes out.

• MANUAL TUNING

During SSB operation on HF bands at low voice
levels, 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.

• CW mode is selected, a side tone is emitted, and “

” blinks; then, the previous mode is selected.

Push and hold 1 sec. to start manual
tuning.

If the tuner cannot reduce the SWR to less than

1.5:1 after 20 sec. of tuning, “ ” goes out. In this
case, check the following:

• the antenna connection and feedline

• the antenna SWR (p. 26; meter function)

• Through inhibit

The AT-180 has a through inhibit condition. When
selecting this condition, the tuner can be used at
poor SWR’s. In this case, automatic tuning in the
HF bands activates only when exceeding SWR 3:1.
Therefore, manual tuning is necessary each time
you change the frequency. Although termed “through
inhibit,” the tuner will be “through” if the SWR is
higher than 3:1 after tuning.

CONVENIENT

• Tuner sensitive condition

If you require critical t uning at any time dur ing
transmission, select the tuner sensitive condition.
See p. 51 for selection.

28

• Automatic tuner start

If you want to turn OFF the tuner under conditions
of VSWR 1.5:1 or less, use “automatic tuner on” and
turn the tuner OFF. See p. 46 for turning the function
ON and OFF.

For mobile operation

For outdoor operation

Long wire

Optional AH-2b
antenna element

AH-4

Y

Y

[TUNER]

ï Optional AH-4 AUTOMATIC ANTENNA TUNER operation

Tuning indicator;
Blinks: Tuning now
Appears: Tune is completed
Disappears: Tune is not completed

RECEIVE AND TRANSMIT

5

The AH-4 matches the IC-718 to a long wire antenna
more than 7 m/23 ft long (3.5 MHz and above).

• See p. 14 for connection.

• S e e t h e A H -4 i nstruct i o n m a nual fo r A H-4
installation and antenna connection details.

AH-4 setting example:

R WARNING: HIGH VOLTAGE!

NEVER touch the antenna element while tuning or

transmitting.

TUNER OPERATION

Tuning is required for each frequency. Be sure to
re-tune the antenna before transmitting when you
change the frequency–even slightly.

• Tuner type setting (p.46)

q Push [PWR] for 1 sec. to turn power OFF.
w While pushing and holding [SET], push [PWR] to

turn power ON.

e Push [UP Y] or [Z DN] one or more times to

select [TUNER].

r Rotate the main dial to select “4”.

• AH-4 AUTOMATIC ANTENNA TUNER is selected.

y Push [PWR] for 1 sec. to turn power OFF.
u Push [PWR] to turn power ON again.

• MANUAL TUNING

q Set the desired frequency in an HF band.

• The IC-718 will not transmit outside of the ham bands,
the AH-4 tuner will tune all frequencies 3.5 to 30 MHz.

w Push and hold [TUNER] for 1 sec.

• “ ” blinks and “CW” appears while tuning.

NEVER operate the AH-4 without an antenna wire.
The tuner and transceiver will be damaged.

NEVER operate the AH-4 when it is ungrounded.

Transmitting before tuning may damage the transceiver.
Note that the AH-4 cannot tune when using a 1⁄2 λ long
wire or multiple of the operating frequency.

e “ ” lights constantly when tuning is complete.

• When the connected wire cannot be tuned, the “ ”
goes out, the AH-4 is bypassed and the antenna wire

is c onn ect ed t o th e an ten na c onn ect or o n th e
transceiver directly.

r To bypass the AH-4 manually, push [TUNER].

CONVENIENT

• PTT tune function

The AH-4 is always tuned when the PTT is pushed
after the frequency is changed (more than 1%).
This function removes the “push and hold [TUNER]”
operation and activates first transmission on the new
frequency. This function is turned ON in initial set
mode (p. 46).

29

5

The best match is in this range.

RECEIVE AND TRANSMIT

n Split frequency operation

Split frequency operation allows you to transmit and
receive on two different frequencies. Split frequency
operation uses two frequencies, one in VFO A and
the other in VFO B.

Following is an example of setting 7.057 MHz, CW
mode in VFO A (for receive) and 7.025 MHz, CW
mode in VFO B (for transmit).

q Select VFO B and set the frequency to 7.025

MHz/ CW.

w Push [A/B] to select VFO A and set the frequency

to 7.057 MHz/CW.

e Push [SPL] to turn the split frequency operation

ON.

• Split operation is now set for receive 7.057 MHz/CW
and transmit 7.025 MHz/CW.

• To change the receive frequency, rotate the main dial,
to change the transmit frequency, rotate the main dial
during transmit mode.

To exchange the transmit and receive frequencies,

push [A/B].

n SWR

The IC-718 has a built-in circuit of measuring antenna
SWR—no external equipment or special adjustments
are necessary.

ï Measuring SWR

q Confirm that the output power is over 30 W.
w Push [SET] one or more times to select the SWR

meter.

e Push [MODE] one or more times to select CW or

RTTY operation.

• Key down or push [PTT] to transmit; then read
the actual SWR from the meter:

≤ 1.5 well matched antenna
≥ 1.5 check antenna or cable connection, etc.

30

n Function for CW

1 23 4

8765

9

10 1112

13

Paddle

[ELEC KEY]

[MICROPHONE]

See p. 32 for connection details:
Paddle operation from front panel
MIC connector.

Straight key

Microphone

Initial set mode setting (p. 45)

4

8

12

[ACC]

1 2 3

765

9

10 11

13

For no break-in operation:
Connect an external switch such as

a foot switch; or use the RTTY

SEND terminal for all bands.

(See p. 33)

: normal

: reverse

: off

: UP/DN key

CW mode and semi
break-in operation
is selected.

Delay time of 6 dots
is selected in quick
set mode for semi
break-in operation.

ï Connection for CW

RECEIVE AND TRANSMIT

5

ï CW operation

q Connect a paddle or straight key as above.
w Select CW (or CW-REV) mode with [MODE].
e Set CW break-in operation as semi break-in, full

break-in or OFF. (See p. 42)

• Push [SET] for 1 sec. to enter quick set mode.

• Push [

FL: full break-in
SE: semi break-in
oF: no break-in

r S et the CW d ela y ti me when se mi b reak-in

operation is selected. (See p. 43)

• Push [SET] for 1 sec. to enter quick set mode; push

∫ UP]/[√ DN] one or more times until “BK–IN”

appears, then rotate the main dial to select the desired
condition:

[∫ UP]/[√ DN] one or more times until “BK–DELAY”
appears, then rotate the main dial to set the desired
delay time.

31

5

BFO

1/3 octave

Push for 1 sec.

Desired signal
(600 Hz)

CW mode (USB side)

Interference
(800 Hz)

BFO

1/2 octave

Desired signal
(600 Hz)

CW REV mode (LSB side)

Interference
(400 Hz)

MODE

This shows the
default setting for
the CW pitch control
(600 Hz).

KEYING WEIGHT EXAMPLE: morse code “K”

*SPACE and DOT length can be adjusted with “KEY SPD”
in the quick set mode only.

DASH

Weight setting:
1:1:3 (default)

Weight setting:
Adjusted

DASH

DOT

(Fixed*)

Adjustable range SPACE (Fixed*)

front panel
MIC connector

MIC U/D

CW
paddle

DOT

E

DASH

y

3.9 kΩ ±5%

2.2 kΩ ±5%

e

Paddle operation

RECEIVE AND TRANSMIT

ï CW pitch control

The received CW audio pitch and monitored CW
audio pitch can be adjusted to suit your preferences
(300 to 900 Hz) with out changing the operating
frequency.

q Push [SET] for 1 sec. to enter quick set mode.
w Push [∫ UP]/[√ DN] one or more times until “CW

PITCH” appears, then rotate the main dial to set
the desired pitch.

ï CW reverse mode

The CW-R (CW Reverse) mode receives CW signals
with a reverse side CW carrier point like that of LSB
and USB modes. Use this mode when interference
signals are near the desired signal and you want to
change the interference tone.

q Push [MODE] one or more times to select CW

mode.

w Push [MODE] for 1 sec. to toggle between CW

and CW-R modes.

ï Electronic CW keyer

The IC-718 has an electronic keyer. Both keying
speed and weight (the ratio of dot : space : dash)
can be set in quick set mode.

• Setting the electronic keyer

q Push [MODE] one or more times to select CW

mode.

w While pushing and holding [SET], push [POWER]

to enter initial set mode.

e Push [∫ UP]/[√ DN] one or more times until “CW

PADDL” appears, then rotate the main dial to
select the paddle type.

• When “ud” is selected, the up/down switches on the
microphone can be use as a paddle.

• When using up/down switches as a paddle, squeeze
keying function is not available.

r Push [∫ UP]/[√ DN] one or more times until “KEY

RAT” appears, then rotate the main dial to select
the desired weight.

• Key weight can be select from 2.8 to 4.5.

t Push [∫ UP]/[√ DN] one or more times until “KEY

32

SPD” appears, then rotate the main dial to select
the desired weight.

• Key weight can be select from 6 to 60.

Paddle operation from front panel MIC connector

Connect a CW paddle as at right to operate an
electronic keyer from the front panel MIC connector.

• This function is available from the front panel mic
connector only.

• Be sure to select item “n,”“r,”or “oF” in CW PADDL in
initial set mode.

• Connect straight key to “DOT” side.

n Function for RTTY

Rear panel

TU or TNC

Personal computer

Rear panel
view

Use either the ACC or one of the two 1/8˝ plugs.

*

1

Connect SQL line when required.

SQL*

1

AF out
SEND
GND
FSKK

GND

AF

2-conductor 1/8˝ plug

[ACC]

[EXT SP]

1 2 3 4

5 6 7 8

9 10 11 12

13

To a TU or TNC
and personal computer.

Use either the ACC or microphone connector.

SQL*1
AF out
AF in

SEND
GND

1 2 3 4

5 6 7 8

9 10 11 12

13

Rear panel
view

*

1

Connect SQL line when required.

q Mic input

[MIC] connector

(Front panel view)

1

2

345

678

i AF output

u Mic GND

y PTT GND

t PTT

r SQL

[ACC] connector

ï Connection for RTTY(FSK)

RECEIVE AND TRANSMIT

5

ï Connection for AFSK

33

5

RTTY mark frequency
is set to 2125 Hz.
2125, 1615 and 1275
Hz are available.

RTTY sift frequency is
set to 850 Hz.
850, 425, 200 and
170 Hz are available.

RTTY mode
is selected.

ReverseNormal

BFO

170

Hz

2125

Hz

170

Hz

2125

Hz

BFO

mark

space

displayed freq.displayed freq.

mark

space

RECEIVE AND TRANSMIT

ï RTTY (FSK) operation

q Connect a terminal unit as at p. 34.
w Select RTTY (or RTTY-R) mode with [MODE].
e Select the desired FSK tone and shift frequencies

as below.

r Set the desired frequency with the main dial.
t Operate the connected PC or TNC (TU).

PRESETTING FOR RTTY

• Tone frequency

q Push [SET] for 1 sec. to enter quick set mode.
w Push [∫ UP]/[√ DN] one or more times until

“TON 2125” appears, then rotate the main dial to
select the desired tone frequency.

• Sift frequency

q Push [SET] for 1 sec. to enter quick set mode.
w Push [∫ UP]/[√ DN] one or more times until

“SIFT 170” appears, then rotate the main dial to
select the desired tone frequency.

• RTTY reverse mode

Received characters are occasionally garbled when
the receive signal is reversed between MARK and
SPACE. This reversal can be caused by incorrect
TNC connections, settings, commands, etc.

To receive a reversed RTTY signal correctly, select
RTTY-R (RTTY reverse) mode.

• Push [MODE] for 1 sec. to select RTTY-R (RTTY
reverse) mode.

ï RTTY (AFSK) operation

q Connect a terminal unit as p. 33.
w Select SSB (LSB) mode with [MODE].

• Generally, LSB is used on the HF bands.

e Select the desired FSK tone/shift frequencies and

keying polarity the same way as FSK operation.

r Set the desired frequency with the main dial.
t Operate the connected PC or TNC (TU).

34

n Memory channels

MEMORY

CHANNEL

MEMORY

CHANNEL

NUMBER

CAPABILITY

TRANSFER

TO VFO

OVER-

WRITING

CLEAR

Regular memory

channels

1–99

One frequency and one mode in
each memory channel.

Yes Yes Yes

Scan edge

memory

channels

P1, P2

One frequency and one mode in
each memory channel as scan
edges for programmed scan.

Yes Yes No

V/M

1

UP

DN

or

CH

CH

Y

Z

V/M

1

CH

ENT

F-INP

V/M

1

A=B

2

CH

ENT

F-INP

MEMORY OPERATION

6

The transcei ver has 101 memory channels. T he
memory mode is very useful for quickly changing to
often-used frequencies.

n Memory channel selection

D Using the [UP Y] or [Z DN] keys

q Push [V/M] to select memory mode.

• “MEMO” appears.

w Push [CH] to enter memory CH select mode.

• “MEMO” blinks.

e Push [UP Y] or [Z DN] several times to select the

desired memory channel.

• Push and hold [UP Y ] or [Z DN] f or con tinuous

selection.

r Push [CH] to exit memory CH select mode.
t To return to VFO mode, push [V/M] again.

All 101 memory channels are tuneable which means
the programmed frequency can be tuned temporarily
with the tuning dial, etc. in memory mode.

D Using the keypad

q Push [V/M] to select memory mode.

• “MEMO” appears.

w Push [CH] to enter memory CH select mode.

• “MEMO” blinks.

e Push [F-INP/ENT], then push the desired memory

channel number using the keypad.

r Push [F-INP/ENT] to select the desired memory

channel.

t Push [CH] to exit memory CH select mode.

35

6

CH

or keypad

Push for 1 sec.

Beep

Beep

Beep

MW

4

MODE

or

DN

UP

CH

Z

Y

CH

ENT

F-INP

V/M

1

[2], [1], [.], [2], [8]

Push for 1 sec.

Beep

Beep

Beep

MW

4

or

DN

UP

CH

then

ENT

F-INP

Z

Y

MEMORY OPERATION

n Memory channel programming

Memory channel programming can be performed
either in VFO mode or in memory mode.

D Programming in VFO mode

q Set the desired frequency and operating mode in

VFO mode.

w Push [CH], then push [UP Y] or [Z DN] several

times to select the desired memory channel.

• “MEMO” blinks.

• “BLANK” appears if the selected memory channel is a

blank channel.

e Push [MW] for 1 sec. to program the displayed

frequency and operating mode into the memory
channel.

r Push [CH] to exit memory channel select mode.

[EXAMPLE]: Programming 7.086 MHz/LSB into

memory channel 10.

36

D Programming in memory mode

q Select the desired memory channel with [UP Y]

or [Z DN] in memory mode.

• “BLANK” appears if the selected memory channel is a

blank channel (and does not have contents).

w Set the desired frequency and operating mode in

memory mode.

• To program a blank channel, use direct frequency

entry with the keypad in advance.

e Push [MW] for 1 sec. to program the displayed

frequency and operating mode into the memory
channel.

• Preamp setting, attenuator on/off,and AGC setting

can also be programmed into a memory channel.

[EXAMPLE]: Programming 21.280 MHz/CW into

memory channel 18.

n Frequency transferring

UP

DN

or

CH

Push for 1 sec.

Beep

Beep

Beep

M

V

6

Y

CH

Z

Y

MEMORY OPERATION

6

The frequency and operating mode in a memory
channel can be transferred to the VFO.

D Transferring in VFO mode

This is useful for transferring programmed contents
to VFO.

q Select VFO mode with [V/M].
w Push [CH], then select the memory channel to be

transferred with [UP Y] or [Z DN].

• “BLANK” appears if the selected memory channel is a
blank channel.

e Push [M≈V] for 1 sec. to transfer the frequency

and operating mode.

• Transferred frequency and operating mode appear on
the frequency readout.

r Push [CH] to exit memory channel select mode.

Frequency transferring can be performed in either
VFO mode or memory mode.

TRANSFERRING EXAMPLE IN VFO MODE

Operating frequency : 21.320 MHz/USB (VFO)
Contents of M-ch 12 : 14.180 MHz/CW

37

6

Push for 1 sec.

Beep

Beep

Beep

M-CL

5

Push for 1 sec.

Beep

Beep

Beep

M V

6

Z

V/M

1

V/M

1

Rotate dial.

VFO A is displayed.VFO A is displayed.

M-ch 16 is displayed.

MEMORY OPERATION

D Transferring in memory mode

Thi s is use ful f o r tra nsfe rrin g freq uenc y and
operating mode while operating in memory mode.

W h en you h ave cha n ged th e f requ ency o r

operating mode in the selected memory channel:

• Displayed frequency and mode are transferred.

• P rogr amme d freq uenc y and m ode in t he
memory channel are not transferred, and they
remain in the memory channel.

q Push [CH], then select the memory channel to

be transferred with [UP Y] or [Z DN] in memory
mode.

• And, set the frequency or operating mode if required.

w Push [M≈V] for 1 sec. to transfer the frequency

and operating mode.

• Dis pla y ed f req uenc y an d op e rat ing mode are
transferred to the VFO.

e To return to VFO mode, push [V/M] momentarily.

TRANSFERRING EXAMPLE IN MEMORY MODE

Operating frequency : 14.020 MHz/CW (M-ch 16)
Contents of M-ch 16 : 14.018 MHz/CW

38

n Memory clearing

Any unnecessary memory channels can be cleared.
The cle ared mem ory chan nel s become bla nk
channels.

q Select memory mode with [V/M].
w Push [CH], then select the memory channel to be

cleared with [UP Y] or [Z DN].

e Push [M-CL] for 1 sec. to clear the contents.

• The programmed frequency and operating mo de
disappear.

• “BLANK” appears.

r To clear other memory channels, repeat steps w

and e.

n Scan types

PROGRAMMED SCAN

Repeatedly scans between two scan edge frequencies
(scan edge memory channels P1 and P2).

This scan operates in VFO mode.

Scan

Scan edge
P1 or P2

Scan edge
P2 or P1

Jump

This scan operates in memory mode.

MEMORY SCAN

Repeatedly scans all programmed memory channels.

Mch 5

Mch 2 Mch 3 Mch 4

Mch 6Mch 7

BLANK

BLANK

Mch 1

Mch 99

Scan squelch condition.1.eps

Scan

start

with

Programmed scan Memory scan

Squelch

open

The scan continues
until it is stopped man­ually, and does not
pause even if it detects
signals.

Scan pauses on
each channel when
the scan resume is
ON; not applicable
when OFF.

Squelch

open

closed

Scan stops when detecting a signal.

If you set scan resume ON in Initial set mode,
the scan pauses for 10 sec. when detecting a
signal, then resumes. When a signal disap-

pears while scan is paused, scan resumes 2

sec. later.

nPreparation

SCANS

7

• Channels

For programmed scan/auto memory write scan:

Pr og ram s can e dg e fre quencies into scan edge
memory channels P1 and P2.

For memory scan:‑

Program 2 or more memory channels except scan
edge memory channels.

• Scan resume ON/OFF

You can select the scan to resume or cancel when
detecting a signal, in set mode. Scan resume ON/OFF
must be set before operating a scan. See p. 45 for
ON/OFF setting and scan resume condition details.

• Scan speed

Scan speed can be selected from 2 levels, high or
low, in Initial set mode. See p. 45 for details.

• Squelch condition

39

7

SCANS

n Programmed scan operation

q Select VFO mode with [V/M].
w Select the desired operating mode.

• Th e operat ing mode can also be changed while
scanning.

e Set [RF/SQL] open or closed.

• See previous page for scan condition.

• If the [RF/SQL] control function is set as RF control,
the squelch always opens. See pgs. 15, 20 for details.

r Push [SCAN] to start the programmed scan.

• “SCAN” appears while scanning.

t When the scan detects a signal, the scan stops,

pauses or ignores it depending on the resume
setting and the squelch condition.

y To cancel the scan, push [SCAN].

If the same frequencies are programmed into the

s c a n edge m em o r y chan n e l P1 a n d P2,
programmed scan does not start.

n Memory scan operation

q Select memory mode with [V/M].
w Select the desired operating mode.

• Th e operat ing mode can also be changed while
scanning.

e Set [RF/SQL] open or closed.

• See previous page for scan condition.

• If the [RF/SQL] control function is set as RF control,
the squelch always opens. See pgs. 14, 30 for details.

r Push [SCAN] to start the memory scan.

• “SCAN” appears while scanning.

t When the scan detects a signal, the scan stops,

pauses or ignores it depending on the resume
setting and the squelch condition.

y To cancel the scan, push [SCAN].

2 or more memory channels must be programmed

for memory scan to start.

40

n General

Item

Value of
Condition

Item

Value of
Condition

[DIAL]

[Z]

[Y]

[SET]

[DIAL]

[PWR]

[Z]

[Y]

[SET]

Set mode is used f or pro gramm ing infrequen tly
changed values or conditions of functions. The IC-718
has 2 separate set modes: quick set mode and initial
set mode.

D Quick set mode operation

q While power is ON, push [SET] for 1 sec.

•

Quick set mode is selected and one of its items appears.

w Push [UP Y] or [Z DN] to select the desired item.
e Rotate the main dial to set the values or conditions

for the selected item.

r Repeat w and e to set other items.
t To exit quick set mode, push [SET] momentarily.

SET MODE

[DISPLAY EXAMPLE: QUICK SET MODE]

8

D Initial set mode operation

q Push [POWER] for 1 sec. to turn power OFF.
w While pushing and holding [SET], push [POWER]

to turn power ON.

• Initial set mode is selected and one of its items appears.

e Push [UP Y] or [Z DN] to select the desired item.
r Rotate the main dial to set the values or conditions

for the selected item.

t Repeat e and r to set other items.
y To exit initial set mode, push [PWR] for 1 sec. to

turn power OFF.

u Push [PWR] to turn power ON again.

• The conditions selection in intial set mode are now
effective.

[DISPLAY EXAMPLE: INITIAL SET MODE]

41

8

SET MODE

n Quick set mode items

• RF power

This item adjusts the RF output power. The RF output
power can be adjusted from L, 1 to 99 and H for indication,
however, it can be adjusted continuously.

•The default is H (maximum power).

Note that while adjusting the output power, the power
meter is displayed automatically.

• Mic gain

This item adjusts microphone gain from 0 to 99 and H for
indication, however, it can be adjusted continuously.
The default is 50.

• VOX gain

This item a djusts the VOX gain for the VOX (voice
activated transmit) function.
The default is 50.

• VOX delay

This item adjusts VOX (voice activated transmit) delay
time. The delay time can be adjusted from 0 to 2 sec. in

0.1 sec. units.
The default is 10 (1.0 sec).

• Anti VOX level

This item adjusts the ANTI-VOX gain for the VOX (voice
activated transmit).
The default is 50.

• CW pitch

This item adjusts CW pitch. CW pitch is adjustable from
300 Hz to 900 Hz in 10 Hz steps.
The default is 60 (600 Hz).

42

• BK-IN

This item selects break-in type for CW operation. There
are three selectable values:
oF : No break-in operation available (default).
SE : Semi break-in operation available.
FL : Full break-in operation available.

• BK-IN delay

Th is item adjusts break- in delay time for CW semi
break-in operation. The delay time is selectable from 2.0
to 13 (dots).
The default is 7.

• Key speed

This item adjusts the CW key speed. The key speed can
be selected from 6 to 60* wpm.
The default is 20 wpm.

* 40, 44, 47, 50, 52, 54, 56, 57, 59 can not be selected.

• Key ratio

This item sets the CW key ratio (or weight). The ratio can
be selected from 2.8 to 4.5.
The default is 30 (3.0).

SET MODE

8

• RTTY mark tone

This item selects RTTY tone. There are 3 selectable
values: 1275, 1615 and 2125 Hz.
The default is 2125 Hz.

• RTTY shift

This item adjusts RTTY shift. There are 4 selectable
values: 170, 200, 425 and 850.
The default is 170 Hz.

• Dimmer

This item selects LCD back light brightness. There are 3
selectable values: Off, Low and High.
The default is HI (High).

43

8

SET MODE

n Initial set mode items

• Mode select

This item is available in all modes, and allows you to
simplify operation by inhibiting the selection of unneeded
operating modes during normal operation. For example if
you are operating mobile and only plan on using LSB and
USB modes, use “MODE SELECTION” to inhibit access
to all other modes (CW, RTTY and AM), thereby making
selection of LSB and USB quick and easy.
The default is on for all operating modes. To toggle an
operating mode on or off, push [MODE] one or more times
until the desired mode is displayed. Then rotate the main
dial to set on or off.

• RF/SQL VR

The [RF/SQL] control can be set as the RF/squelch control
or automatic (acts as squelch in AM modes; as RF in SSB/
CW/RTTY modes) or the squelch control. (See p. 20)
The default is rS (RF/squelch).

• Beep

A beep sounds each time a switch is pushed to confirm it.
This function can be turned OFF for silent operation.
The default is on.

• Beep level

This item adjusts the confirmation beep level.
The default is 50.

• Band edge beep

A beep sounds when an operat ing frequency enters
or exits a transmit fr equency range. T his func tions
independent of the confirmation beep setting.
The default is on.

• Side-tone level

This item adjusts the CW side-tone level.
The default is 30.

44

• Meter peak hold

This item selects meter peak hold function on or off.
The default is on.

• Scan speed

This item sets the rate at which channels or frequencies
are scanned during scan operations. High or Low can be
selected.
The default is HI (High).

• Scan resume

This item sets the scan resume function ON or OFF.
ON: scan resumes 10 sec. after stopping on a signal
(or 2 sec. after a signal disappears); OFF: scan soes
not resume after stopping on a signal. For the priority
watch, setting to OFF pauses the watch until the signal
disappears and scan resumes.
The default is on.

SET MODE

8

• AM Noise blanker

When t h i s i t e m is s e t t o ON, t h e n o i s e blanker
function is available on AM mode. This is useful when
communicating in AM mode (the noise blanker function
sho u ld not b e use d when l iste ning t o reg u lar A M
broadcasts as it may degrade the receive audio).
The default is on.

• Auto TS

This item sets auto tuning speed. The tuning dial normally
changes the frequency 2.5 KHz/revolution in 10 Hz tuning
step. When auto tuning step is turned on this increases
to 50 KHz/revolution in 50 Hz tuning step during quick
rotation of the dial.
The default is on.

• Key type

This item adjusts the CW paddle type. Four selections are
available.

• n : normal (for electronic keyer use)

• r : reverse (for electronic keyer use)

• oF : Turns OFF the electronic keyer (for straight key use)

• ud : For using the microphone’s [UP]/[DN] keys insted
of the paddle.

The default is n (normal).

45

8

SET MODE

• Tuner type

This item selects optional antenna tuner type.Three
selections are available.

• no : No optional tuner connected.

• 4 : The optional AH-4 antenna tuner is connected.

• 18 : The optional AT-180 antenna tuner is connected
The default is no.

• Auto tune

The optional AT-180 ANTENNA TUNER has an automatic
start capability which starts tuning if the SWR is higher
than 1.5—3.
When “off” is selected, the tuner remains O FF even
when the SWR is poor (1.5—3). When “on” is selected,
automatic tune starts even when the tuner is turned OFF.
The default is oF (OFF).

• PTT tune

When an optional AH-4 or AT-180 AUTOMATIC ANTENNA

TUNER is connected, tuning can be started automatically at

the moment the PTT is pushed.
The default is oF (OFF).

• Speech language

When an optional UT-102 VOIC E SYNTHESIZER UN IT is
installed, you can select between English and Japanese
as the language.
The default is En (English).

• Speech speed

When an o ption al UT- 102 VOICE SY NT HE SI ZER UN IT is
installed, you can select faster or slower synthesizer output.
The default is HI (High).

• Speech S-meter level

When an optional UT-102 is installed, the synthesizer can
be set to read the frequency/mode only (OFF), or both the
frequency/mode and S-meter level (ON).
The default is on.

46

• CI-V baud rate

This item sets the data transfer rate. When “Auto” is
selected, the baud rate is automatically set according to
the connected controller or remote controller.
The default is At (Auto).

• CI-V address

To distinguish equipment, each CI-V transceiver has its
own Icom standard address in hexadecimal code. The
IC-718’s address is 5E.
When 2 or more IC-718s are connected to an optional
CT-17 CI-V LEVEL CONVERTER, rotate the main dial to select
a different address for each IC-718 in the range 01H to 7FH.
The default is 5E.

• CI-V Transceive

Tra n scei ve ope rati o n is pos sibl e with t he IC- 718
connected to other Icom HF transceivers or receivers.
When “on”is selected, changing the frequency, operating
mode, etc. on the IC-718 automatically changes those of
connected transceivers (or receivers) and vice versa.
The default is on.

SET MODE

8

• CI-V 731 mode

When connecting the IC-718 to the IC-735 for transceive
operation, you must change the operating frequency data
to 4 bytes.

• This item MUST be set to “on” when operating transceiver with

the IC-735.

The default is oF (off).

• OPTION Filter

When an optional IF filer is installed, this selection is
necessary, otherwise the filt ers cannot be selected.
Selections available are FL-96, FL-222, FL-52A, FL-53A,
FL-257 and none (default). See p. 24 for usable filters for
each mode and see P. 50 for filter installation.

• Expand Filter

When an optional I F filter is installed, this selection
expands filter and filter selection (W/N) key combination
on operating mode independently.
The default is oF (off).

• Filter select (Wide/Narrow)

When an optional IF filter is installed, you can arrange the
filter and filter selection key combination. (p. 25)

47

9

INSTALLATION AND CONNECTIONS

n Opening the transceiver’s

case

Fo llow the ca se and cover o pening pro cedures
shown here when you want to install an optional unit
or adjust an internal unit, etc.

CAUTION: DISCONNECT the DC power cable

from the IC-718 before performing any work on the
transceiver. Otherwise, there is danger of electric
shock and/or equipment damage.

q R e m o v e t h e 5 screws fr o m the to p of the

transceiver and 4 screws from the sides, then lift
up the top cover.

w Rem ove t he 5 screw s f ro m t he bo ttom of th e

transceiver, then remove the bottom cover.

n Optional bracket and carrying handle

D Mounting bracket

An optional IC-MB5 MOBILE MOUNTING BRACKET is
available to install the radio under a table, on a wall,
in a vehicle, etc.

Select an area to mount the receiver keeping in mind
that the weight of the transceiver is approx. 3.80kg.

D Carrying handle

An optional handle allows you to easily carry and
transport the transceiver.

Attach the MB-23 CARRYING HANDLE with the
supplied rubber feet as shown.

48

n CR-338 high stability crystal unit

CR-338

Internal crystal

PLL unit

W 3

W 2

J 4201

J 4401

P 4

J 201

J 401

P 2; Frequency check point
(Connect a frequency counter
and adjust the frequency to

64.00000 MHz with C 16.)

C 16

MAIN unit

PLL unit

Solder 4 leads

INSTALLATION AND CONNECTIONS

9

By installing the CR-338, the total frequency stability
of the receiver will be improved.

q R emo ve th e bot tom cover as shown in t he

diagram before.

w Disconnect W2 from J4401 (MAIN unit) and W3

from J4201 (MAIN unit).

e Remove 9 screws from the PLL unit, disconnect

P4 from J201 (MAIN unit) and P2 from J401
(MAIN unit), then remove the PLL unit.

r Remove the supplied internal crystal and replace

with the CR-338.

t Return the PLL unit, plugs and flat cables to their

original positions.

y Adjust the reference frequency at C16 using a

frequency counter if desired.

• Connect the frequency counter to P. 2 (PLL unit).

u Return the bottom cover to its original position.

n UT-102 voice synthesizer unit

The UT-102 announces the received frequency, mode,
S-meter level and current time in a clear, electronically­generated voice, in English (or Japanese).


Push [LOCK] for 1 sec. to announce the frequency,
etc.

q Remove the bottom cover as shown above.
w

Re mo ve the protectiv e paper attached to the
bottom of the UT-102 to expose the adhesive strip.

e Plug UT-102 into J2501 on the MAIN unit as

shown at right.

r Return the bottom cover to its original position.

49

9

UT-106

P 1 (from UT-106)

J 2602

J 2603

P 2601

insulating case

flat cable

MAIN unit

Turn the unit over

Tr-clamper

W 4

W 5

P 5

P 1

J 701

J 1

J 4101

MAIN unit

Tr-clamper

Optional IF filter

Solder 4 leads

UT-106

P 1 (from UT-106)

J 2602

J 2603

P 2601

insulating case

flat cable

MAIN unit

J 2603

Main unit

Rear panel

UT-106

Flat cable*

insulating case

* Supplied with UT-106

Turn the unit over

UT-106

�

Surplus cable

J 2602

J 2602

INSTALLATION AND CONNECTIONS

n UT-106 DsP receive unit

The UT-106 provides AF DSP functions such as
noise reduction and auto notch.

q Remove the bottom cover.
w Slide the insulating case onto the UT-106 as

shown right. (Fig. 1)

e Remove the con nection ca ble (P2601 ) from

J2602 on the MAIN unit. Connect the cable into
J1 on the UT-106.

r Plug the connection cable (P1) from the UT-106

to J2602 on the MAIN unit.

t Plug the flat cable into J3 on the UT-106 and to

J2603 on the MAIN unit.

• Take care regarding the conductor direction.

y Turn the UT-106 unit over. (Fig. 2)

• No need to fix with an adhesive strip, etc.

u Put the UT-106 on the MAIN unit.

• No need to fix with an adhesive strip, etc.

• Ensure that the surplus cable from UT-106 is stored
under the unit.

i Return the bottom cover to its original position.

Fig. 1

• Turn the unit over

n Optional IF filters

Several IF filters are available for the IC-718. You can
install 1 filter for 455 kHz IF. Choose the appropriate
filter for your operating needs. (pgs, 24−25)

D Installation

q Remove the bottom cover as shown on the p. 48.
w

Remove 7 screws, connection cable p1 from J1,
p5 from J701, W4 from J4101 and W5 from J4001
and 2 Tr-clampers as shown in the diagram below.

e Install the desired 455 KHz filter as shown in the

diagram below.

r

Mounting the filter with supplied washers and nuts.

Fig. 2

t Solder the 4 leads.
y Return the MAIN unit and bottom cover to their

original positions.

After filter installation, specify the installed filter

using initial set mode. (p. 47) Otherwise, the
installed filter will not function properly.

50

INSTALLATION AND CONNECTIONS

� AT-180 internal switch description

The optional AT-180 has 3 operating conditions for
HF band operation. Select a suitable condition
according to your antenna system.

qRemove the top cover of the AT-180.
wSet the tuner switches to the desired positions

according to the table below.

• Speci cations for the AT-180

• Frequency coverage : 1.9 – 54 MHz

• Input impedance : 50 Ω

• Maximum input : 120 W
power

• Minimum tuning : 8 W
power

• Matching impedance : 16.7–150 Ω

(HF band)

range 20–125 Ω

(50 MHz band)

• Tuning accuracy : Less than SWR 1.5:1

• Insertion loss : Less than 1.0 dB

(after tuning)

• Power supply : 13.8 V DC/1 A

(supplied from

requirements

the transceiver’s ACC socket)

• Dimensions

(mm/in)

: 167(W) × 58.6(H) × 225(D)

69⁄16(W) × 25⁄17(H) × 87⁄8(D)

• Weight : 2.4 kg; 5 lb 4 oz

• Supplied accessories : coaxial cable

(1 m)

,

ACC cable

(DIN 13 pins)

• AT-180 inside top cover

• Connector information for ACC(2) socket

S2 S1

D C B A

ACC 2

1

2

3

4

76

5

PIN NO./
NAME

DESCRIPTION

q8 V

Regulated 8 V output.
(10 mA max.)

wGND

Connects to ground.

eSEND

Input/output pin.
Goes to ground when transmitting (20 mA
max). When grounded, transmits.

rBAND

Band voltage output.
(Varies with amateur band; 0 to 8.0 V).

tALC

ALC output voltage (–4 to 0 V).

y NC

No connection.

u 13.8V

13.8 V output when power is ON (1 A max).

SW Position Operation

S1

A

(default)

The tuner operating condition is set by S2
described below.

B

THROUGH INHIBIT

The tuner tunes the antenna even when
the antenna has poor SWR (up to VSWR
3:1 after tuning). In this case, manual tun­ing is necessary each time you change the
frequency although the tuner automatically
starts tuning when the VSWR is higher
than 3:1. This setting is called “through
inhibit,” however, the tuner is set to
“through” if the VSWR is higher than 3:1
after tuning.

S2

C

TUNER SENSITIVE CONDITION

The tuner tunes each time you transmit
(except SSB mode). Therefore, the lowest
SWR is obtained at any given time.
For SSB mode, the same condition is as

D

(default)

NORMAL CONDITION

The tuner tunes when the SWR is higher
than 1.5:1. Therefore, the tuner activates
only when tuning is necessary.

10

OPTIONAL INSTALLATIONS/SETTINGS

the “D” position below.

9

51

10

PROBLEM POSSIBLE CAUSE SOLUTION REF.

DISPLAY

POWER

RECEIVE

TRANSMIT

SCAN

Power does not come on
when the [POWER] switch
is pused.

No sounds comes from
the speaker.

Sensitivity is low.

Receive audio is distorted.

Transmitting is impossible.

Output power is too low.

No contact possible with
another station.

Transmitted signals are
distorted.

Programmed scan does
not stop.

Programmed scan does
not start.

Memory scan does not
start.

The displayed frequency
does not change prooerly.

p. 12
p. 53

p. 2

p. 2

p. 6

—
—

p. 3

p. 3

p. 20
p. 21
p. 21
p. 22

p. 23

p. 17

p. 42
p. 42
p. 10

p. 3

p. 21
pgs. 7,
31, 32

p. 2
p. 27

p. 3
p. 30

p. 40

p. 40

p. 6
p. 41
p. 53

• Reconnect the DC power cable correctly.

• Check for the cause, then replace the fuse
with a spare one.
(Fuses are installed in the DC power cable

and the internal PA unit.)

• Rotate [AF] clockwise to obtain a sutable lis­tening level.

• Rotate [RF/SQL] to 10 o’clock position to open
the squelch.

•

Check the SEND line of an external unit, if de­sired.

• Reconnect to the antenna connector.

• Connect an antenna suitable for the operating
frequency.

• Push [TUNER] for 2 sec. to manually tune the
antenna.

• Push [ATT] to select “ATT” OFF.

• Select a suitable operating mode.

• Rotate the SHIFT control to center position.

• Push [NB] to turn the function OFF.

• Push [P.AMP] to turn the function OFF.

• Set the [NR] control for maximum readability.

• Set the frequency to a ham band.

• Set [RF POWER] to a suitable position.

• Set [MIC GAIN] to a suitable position.

• Select an antenna suitable for the operating
frequency.

• Push [TUNE] for 2 sec. to manually tune the
antenna.

• Push [RIT] to turn the function OFF.

• Push [SPLIT] to turn the function OFF.

• Set [MIC GAIN] to a suitable position.

• Turn [COMP] OFF.

• Set [RF/SQL] to the threshold point.

• Reset [RF/SQL] control assigned and set it to
the threshold point.

•

Program different frequencies in scan edge

memory channels P1 and P2.

• Program 2 or more memory channels.

• Push [LOCK] to deactivate the function.

• Push [SET] to exit the quick set mode.

• Reset the CPU.

• DC power cable is improperly connected.

• Fuse is blown.

• Power supply not turned ON.

• Volume level is too low.

• The squelch is closed.

•

The transceiver is in the transmitting condition.

• The antenns is not connected properly.

• The antenna is for another band is connected.

• The antenna is not properly tuned.

• The attenuator is activated.

• The operating mode is not selected correctly.

• IF SHIFT function is activated.

• Noise blanker function is activated.

• Preamp is activated.

• The noise reduction is activated and the [NR]
control is set too high.

• The operating frequency is not set to a ham
band.

• [RF POWER] is set too low.

• [MIC GAIN] is set too low.

• The antenna for another band is selected.

• The antenna is not properly tuned.

• RIT function is activated.

• Split frequency function is activated.

• [MIC GAIN] too high.

• [COMP] function is activated.

• Squelch is open.

• [RF/SQL] is assigned to RF gain control and
squelch is open.

•

The same frequencies have been programmed
in scan edge memory channels P1 and P2.

• 2 or more memory channels have not been
programmed.

• The dial lock function is activated.

• A quick set mode screen is selected.

• The internal CPU has mulfunctioned.

MAINTENANCE

n Troubleshooting

The following chart is designed to help you correct
problems which are equipment malfunctions.

If you are not able to locate the cause of a problem
or solve it through the use of this chart, contact your
nearest Icom Dealer or Service Center.

52

MAINTENANCE

FGB 4 A

PA unit

20 A
fuse

[PWR]

[Z]

[Y]

10

n Fuse replacement

If a fuse blows or the transceiver stops functioning,
try to find the source of the problem, and replace the
damaged fuse with a new, rated fuse.

CAUTION:-DISCONNECT the DC power cable

from the transceiver when changing a fuse.

The I C-71 8 has 2 t ypes o f fus e s ins tall e d for
transceiver protection.

• DC power cable fuses �������� FGB 20 A

• Circuitry fuse ������������ FGB 4 A

CIRCUITRY FUSE REPLACEMENT

The 13.8 V DC from the DC power cable is applied
to all units in the IC-718 through the circuitry fuse.
This fuse is installed in the MAIN unit.

q Remove the top cover as shown on p. 48
w R epl ace t he c ircuitr y fu se as show n in the

diagram at right.

e Replace the top cover.

DC POWER CABLE FUSE REPLACEMENT

n Resetting the CPU

Resetting CLEARS all programmed contents in

memory channels and returns programmed values
in set mode to their defaults.

Wh en firs t app ly ing p ower or when the functio n
seems to be displaying erroneous information, reset
the CPU as follows:

q Make sure transceiver power is OFF.
w While pushing [UP Y] and [Z DN], push [PWR] to

turn power ON.

• The internal CPU is reset.

• The transceiver displays its initial VFO frequencies
when resetting is complete.

53

11

SPECIFICATIONS

D General

• Frequency coverage : Receive

0.03–29.999999 MHz*
Transmit

1.800– 1.999999 MHz*

10.100–10.150000 MH

14.000–14.350000 MHz

18.068–18.168000 MHz

21.000–21.450000 MHz

24.890–24.990000 MHz

28.000–29.700000 MHz
*1Guaranteed range: 0.5–29.999999 MHz
*2Varies according to version

3.500– 3.999999 MHz*

7.000– 7.300000 MHz

• Spurious emissions : Less than –50 dB below

1

*Spurious freq.; Below 30 MHz: –50 dB

2

2

NOTE: Limit in dB decreases linearly with thw logarithm of

frequency in the range 30 MHz to 50 MHz.

• Carrier suppression : More than 40 dB

• Unwanted sideband : More than 50 dB

• Microphone connector : 8-pin connector (600 Ω)

• Key connector : 3-conductor 6.5 (d) mm (1⁄4˝)

• SEND/ALC connector : Phono (RCA)

Above 50 MHz: –60 dB

peak output power

• Mode : USB, LSB, CW, RTTY, AM,

• Number of memory : 101 (99 regular, 2 scan edges)

channels

• Frequency stability :

• Power supply : 13.8 V DC ±15%

requirement (negative ground)

• Current drain : Receive

(at 13.8 V DC) Standby 1.3 A
Max. audio 2.0 A
Transmit
Max. power 20.0A

•

Operatable temp. range

• Antenna connector : SO-239 (50 Ω)

• Dimensions :

(projections not included)

• Weight (approx.) : 3.8 kg; 8 lb 6 oz

Less th an ±200 Hz fro m 1
min. to 60 min. after power
on. After that rate of stability
less than ±30 Hz/hr. at +25°C

( + 7 7 ° F ) . T e m p e r a t u r e

fluctuations 0°C to +50°C

(+32°F to +122°F) less than ±

350 Hz.

: –10°C to +60°C; +14°F to

+140°F

240(W) × 95(H) × 239(D) mm
97⁄16(W) × 33⁄4(H) × 913⁄32(D) in

D Receiver

• Receive system : Double-conversion
superheterodyne system

• Sensitivity :

SSB, CW, RTTY 0.16 µV (1.8–29.999999 MHz)
AM 13 µV (0.5–1.799999 MHz)
2 µV (1.8–29.999999 MHz)

• Squelch sensitivity (threshold):

SSB, CW, RTTY Less than 5.6 µV

• Selectivity :

SSB, CW, RTTY More than 2.1 kHz/–6 dB

Less than 4.5 kHz/–60 dB

AM More than 6 kHz/–6 dB

Less than 20 kHz/–40 dB

• Spurious and image rejection ratio:

More than 70 dB

(1.8–29.999999 MHz)

• RIT variable range : ±1200 Hz

• Audio output power : More than 2.0 W at 10%

(at 13.8 V DC) distortion with an 8 Ω load

• PHONES connector :

• External SP connector : 2-conductor 3.5 (d) mm (1⁄8˝)

3-conductor 6.35 (d) mm (1⁄4˝)

/8 Ω

54

• ACC connector : 13-pin

• REMOTE connector : 2-conductor 3.5 (d) mm (1⁄8˝)

D Transmitter

• Output power :
SSB, CW, RTTY 2–100 W
AM 2–40 W

• Modulation system :
SSB Balanced modulation
AM Low level modulation

All stated specifications are typical and subject to
change without notice or obligation.

OPTIONS

12

IC-PW1 HF + 50 MHz 1 KW LINER AMPLIFIER

AH-4 HF + 50 MHz AUTOMATIC

AH-2b ANTENNA ELEMENT

ANTENNA TUNER

Specially designed to tune a long
wire antenna for portable or mobile
HF operation. The PTT tuner start
function provides simple operation.

• Input power rating: 120 W

Ful l- dut y 1 k W line ar
am pl ifier i ncluding an
a u t om a t ic an t e nn a
tun er . Ha s au tomat ic
t u n i n g a n d b a n d
sele c t ion ca p a bili t y .
F u ll b r e a k - in ( Q S K )
op er ation i s pos si bl e.
The amp l i f i er/po w e r
s u p p l y u n i t and t h e
remote control unit are
separated.

A 2 . 5 m l o n g
anten n a e l ement
for mobile operation
with the AH-4.

• Frequency
coverage:

3.5–28 MHz bands
with the AH-4

AT-180 HF + 50 MHz
AUTOMATIC ANTENNA TUNER

Fully automatic antenna tuner with
preset memories for each 100 kHz.
Unique “Automatic tuner on ” function
is available. See p. 51 for AT-180
specifications.

PS-85 DC POWER SUPPLY

Light wei ght sw itchi ng r egula tor
system power supply.

• Output voltage: 13.8 V DC

• Max. current drain: 20 A

SM-8 DESKTOP MICROPHONE

Includi n g 2 co n n e c t ion cables
fo r simultaneous connection of 2
tra nsc e ive rs. Has [ UP] /[D O WN]
switches. .

HM-36 HAND MICROPHONE

Hand mic ropho ne equip pe d with
[UP]/[DOWN] switches.
Same as supplied.

SM-20 DESKTOP MICROPHONE

Unidirectional, electret microphone
for base station operation. Includes
[UP]/[DOWN] switches and a low cut
function.

SP-20 EXTERNAL SPEAKER

4 audio filters; headphone jack; can
connect to 2 transceivers.

• Input impedance: 8 Ω

• Max. imput power: 5 W

SM-6 DESKTOP MICROPHONE

El ectret con de nser-ty pe de sktop
microphone.

SP-21 EXTERNAL SPEAKER

Designed for base station operation.
Input impedance: 8 Ω
Max. input power: 5 W

55

12

a

p

p

ro

x.

2

4

.5

m

;

8

0

.3

ft

OPTIONS

SP-7 EXTERNAL SPEAKER

Compact speaker for base station
operation. Height can be adjusted for
your convenience.

UT-102 VOICE SYNTHESIZER

Announces the receive frequency,
mode, S-meter level and current time
in a clear, electronically-generated
voice, in English (or Japanese).

FL-52A, FL-53A, FL-96, FL-222
and FL-257 455 KHz FILTERS

• FL-52A: 500 Hz/–6dB (CW/RTTY
narrow)

• FL-53A: 250 Hz/–6dB (CW narrow)

• FL-96: 2.8 KHz/–6dB (SSB wide)

• FL-222:

1.8 KHz/–6dB (SSB narrow)

• FL-257: 3.3 KHz/–6dB (SSB wide)

CR-338 HIGH-STABILITY

CRYSTAL UNIT

C o n t a i n s a t e m p e r a t u r e ­com p ensa t ing o v en he ater a nd
crystal unit for improved frequency
stability.

• Frequency stability: ±0.5 ppm

UT-106 DSP RECEIVE UNIT

Provides AF DSP functions such as
noise reduction and auto notch.

MB-23 CARRYING HANDLE

Car ryi ng han dle , co nve nie nt f or
portable operation.

IC-MB5 MOBILE MOUNTING

BRACKET

CT-17 CI-V LEVEL

CONVERTER

For remote rece iver control using

Transceiver mountin g bracke t for
mobile operation.

a p erson a l c o m puter . Y o u c a n
change frequencies, operating mode,
memory channels, etc.

OPC-599 ADAPTER CABLE

13-pin, ACC connector to 7-pin + 8-pin ACC connector.

AH-710 FOLDED DIPOLE

ANTENNA

Covers from 1.9–30 MHz bands. Has
an SO-239 connector. 30 m (98.4 ft)
coaxial cable with PL-259 connector
is supplied.

56

CONTROLLER TO IC-718

FEFEFE 5E E0 Cn Sc Data area FD

Preamble code (fixed)

Transceiver’s default address

Controller’s default address

Command number

(see table at right)

Sub command number

(see table at right)

BCD code data for frequency or

memory number entry

End of message code (fixed)

OK MESSAGE TO CONTROLLER

FE FE E0 5E FB FD

Preamble code (fixed)

Controller’s default address

Transceiver’s default address

OK code (fixed)

End of message code (fixed)

NG MESSAGE TO CONTROLLER

FE FE E0 5E FA FD

Preamble code (fixed)

Controller’s default address

Transceiver’s default address

NG code (fixed)

End of message code (fixed)

IC-718 TO CONTROLLER

FE E0 5E Cn Sc Data area FD

Preamble code (fixed)

Controller’s default address

Transceiver’s default address

Command number

(see table at right)

Sub command number

(see table at right)

BCD code data for frequency or

memory number entry

End of message code (fixed)

q w e r t y u

q w e r t y u

n Remote jack (CI-V) information

9–15
V DC

personal
computer

ct-17

BC-25
(optional)

mini-plug cable

IC-718

• CI-V connection example

The transce ive r can be co nnected through an
optional CT-17 CI-V LEVEL CONVERTER to a personal
computer equipped with an RS-232C port. The Icom
Commun ic at ions Interface-V (CI-V) controls the
following functions of the transceiver.

Up to 4 Icom CI-V transceivers or receivers can be
connected to a personal computer equipped with an
RS-232C port. See p. 32 for setting the CI-V condition
using set mode.

• Data format

The CI-V system can be operated using the following
data fo rma ts. Data formats di ffe r ac cor din g to
command numbers. A data area or sub command is
added for some commands.

CONTROL COMMAND

13

57

13

Sub commandCommand Description

—00 Send frequency data

01

Send mode data

—03 Read frequencies
—04 Read operating mode

05

Set operating frequency

00
01
A0
B0

Set VFO
Set VFO A
Set VFO B
VFO A=B
VFO A  B

07

—0B Memory clear
00
01
D0
D3

0E

Scan stop
Prog/Memo Scan Start
Resume OFF
Resume ON

0F

SPLIT OFF
SPLIT ON

01
02
03
06
09
0A
0B
0C
0F

10 Set TS

15

02 Read Upper/Lower frequencies

06 Set mode

08

Set Memory

Set Memory CH
09 Memory write
0A Memory  VFO

00
01

11

14

ATT

AF Gain

RF Gain

SQL Level

NR Level

CW Pitch

RF Power

MIC Gain

KEY Speed

BK-IN Delay

16

19

02
22
40
41
44
46
47
00

01
02

Read SQL Open/Close

Read SIG (S-meter) level

PRE-AMP

NB

NR

Auto Notch

COMP

VOX

BK-IN

Read ID

—
—

—
—
—

—
—
—
—

—
—

CONTROL COMMAND

• Command table

58

FILTER unit

Final amplifier (2SC2094x2)

PA unit

Caution:

The transceiver has been
thoroughly tested and
adjusted at the factory
before being shipped.
The transceiver warranty
does not cover any
problems caused by
unauthorized internal
adjustment.

Fuse (FGB 4 A)

R 25

Final ID adj. (R 24)

Drive ID adj. (R 21)

PLL unit

MAIN unit

Carrier suppression adj.
(R 2303)

IC APC adj. (R 1720)
Tx power adj. (R 1707)

AM Tx carrier adj.
(R 1730)

Reference freq. adj. (C 16)

Optional crystal (CR-338)

Optional IF filter
(See p. 24)

n Top view

INTERNAL VIEW

14

n Bottom view

59

15

INSTALLATION NOTES

For a m a teur b a se s t a t i on i n s t a llations, it is
recommended that the forwards clearance in front of
the antenna array is calculated relative to the EIRP
(Effective Isotropic Radiated Power). The clearance
height below the antenna array can be determined in
most cases from the RF power at the antenna input
terminals.

As different exposure limits have been recommended
for different frequencies, a relative table shows a
guideline for installation considerations.

Below 10 MHz, the recommended limits are specified
in terms of V/m or A/m fields as they are likely to fall
within the near-field region. Similarly, at antennae
may be physically short in terms of electrical length
and that the installation will require some antenna
matching device which can create high intensity
magnetic fields. Analysis of such MF installations
is best considered in association with published
guidance notes such as the FCC OET Bulletin 65
Edition 97-01 and its annexes relative to amateur
transmitter installations. Further information can be
found at http://www.arrl.org/

• Typical amateur radio installation

Exposure distance assumes that the predominant
radiati on patte rn is for wards and that radiati on
verti cally downward s is at unity gai n (sid elobe
suppresion is equal to main lobe gain). This is true of
almost every gain antenna today. Exposed persons
are assumed to be beneath the antenna array and
have a typical height to 1.8 m.
Th e figur es as su me th e wor st case emissi on of
constant carrier.

In a ll cases a ny possib le ri sk depend s on t he
transmitter being activated for long periods. (actual
recommendation limits are specified as an average
of 6 minutes) Normally the transmitter is not active for
long periods of time. Some radio licenses will require
that a timer circuit automatically cuts the transmitter
after 1–2 minutes etc.

Similarly some types of transmitter, SSB, CW, AM,
etc. have a lower ‘average’ output power and the
perceived risk is even lower.

Versions of the IC-718 which display the “CE”

symbol on the serial number seal, comply with
the essential requirements of the European
Rad i o and T e leco mmun i cati o n Ter m inal
Directive 1999/5/EC.

T h is warn i ng symb o l indic a tes tha t t his

equi p m ent op erate s i n n o n-har m o nised
frequency bands and/or may be subje ct to
licensing conditions in the country of use. Be
sure to check that you have the correct version
of this radio or the correct programming of
this radio, to comply with national licensing
requirement.

60

For the bands 10 MHz and higher the following power
density limits are recommended :
10–30 MHz 2 W/sq m

Watts (EIRP)/ Clearance heights
1 2.1 (m)
10 2.8
25 3.4
100 5
1000 12

Watts (EIRP)/ Forward clearance
100 2 (m)
1,000 6.5
10,000 20
100,000 65

List of Country codes (ISO 3166-1)

Country Codes

1 Austria AT
2 Belgium BE
3 Bulgaria BG
4 Croatia HR
5 Czech Republic CZ
6 Cyprus CY
7 Denmark DK
8 Estonia EE
9 Finland FI
10 France FR
11 Germany DE
12 Greece GR
13 Hungary HU
14 Iceland IS
15 Ireland IE
16 Italy IT
17 Latvia LV

Country Codes

18 Liechtenstein LI
19 Lithuania LT
20 Luxembourg LU
21 Malta MT
22 Netherlands NL
23 Norway NO
24 Poland PL
25 Portugal PT
26 Romania RO
27 Slovakia SK
28 Slovenia SI
29 Spain ES
30 Sweden SE
31 Switzerland CH
32 Turkey TR
33 United Kingdom GB

INSTALLATION NOTES

DECLARATION

OF CONFORMITY

We Icom Inc. Japan

1-1-32, Kamiminami, Hirano-ku
Osaka 547-0003, Japan

Kind of equipment: HF

ALL BAND TRANSCEIVER

Type-designation:

Version (where applicable):

Signature

H. Ikegami
General Manager

Authorized representative name

Icom (Europe) GmbH

Himmelgeister straße 100
D-40225 Düsseldorf

Place and date of issue

Düsseldorf 17th July 2007

i718

Declare on our sole responsibility that this equipment complies with the
essential requirements of the Radio and Telecommunications Terminal
Equipment Directive, 1999/5/EC, and that any applicable Essential Test
Suite measurements have been performed.

This compliance is based on conformity according to Annex III of the
directive 1999/5/EC using the following harmonised standards:

i) EN 301 489-1 V1.4.1 (August 2000)
ii) EN 301 489-15 V1.2.1 (August 2002)
iii) EN 301 783-2 V1.1.1 (September 2000)
iv) EN 60950-1: 2001

15

Version and Frequency coverage

EUR (#03)
Tx

1.800000

3.500000

7.000000

10.100000

14.000000

18.068000

21.000000

24.890000

28.000000

ITA (#04)
Tx

1.800000

3.400000

6.900000

9.900000

13.900000

17.900000

20.900000

24.400000

28.000000

– 1.999999
– 3.800000
– 7.100000
– 10.150000
– 14.350000
– 18.168000
– 21.450000
– 24.990000
– 29.700000

– 1.999999
– 3.999999
– 7.499999
– 10.499999
– 14.499999
– 18.499999
– 21.499999
– 25.099999
– 29.999999

Rx

0.500000 – 29.999999

Rx

0.500000 – 29.999999

FRA (#05)
Tx

1.810000

3.500000

7.000000

10.100000

14.000000

18.068000

21.000000

24.890000

28.000000

– 1.850000
– 3.800000
– 7.100000
– 10.150000
– 14.350000
– 18.168000
– 21.450000
– 24.990000
– 29.700000

ESP (#06)
Tx

1.830000

3.500000

7.000000

10.100000

14.000000

18.068000

21.000000

24.890000

28.000000

– 1.850000
– 3.800000
– 7.100000
– 10.150000
– 14.350000
– 18.168000
– 21.450000
– 24.990000
– 29.700000

Rx

1.810000

3.500000

7.000000

10.100000

14.000000

18.068000

21.000000

24.890000

28.000000

Rx

1.830000

3.500000

7.000000

10.100000

14.000000

18.068000

21.000000

24.890000

28.000000

– 1.850000
– 3.800000
– 7.100000
– 10.150000
– 14.350000
– 18.168000
– 21.450000
– 24.990000
– 29.700000

– 1.850000
– 3.800000
– 7.100000
– 10.150000
– 14.350000
– 18.168000
– 21.450000
– 24.990000
– 29.700000

(Unit: MHz)

61

< Intended Country of Use >

AT
FI
IT
PL
GB
RO

BE
FR
LV
PT
IS
TR

CY
DE
LT
SK
LI
HR

CZ
GR
LU
SI
NO

DK
HU
MT
ES
CH

EE
IE
NL
SE
BG

< Intended Country of Use >

AT
FI
IT
PL
GB
RO

BE
FR
LV
PT
IS
TR

CY
DE
LT
SK
LI
HR

CZ
GR
LU
SI
NO

DK
HU
MT
ES
CH

EE
IE
NL
SE
BG

< Intended Country of Use >

AT
FI
IT
PL
GB
RO

BE
FR
LV
PT
IS
TR

CY
DE
LT
SK
LI
HR

CZ
GR
LU
SI
NO

DK
HU
MT
ES
CH

EE
IE
NL
SE
BG

< Intended Country of Use >

AT
FI
IT
PL
GB
RO

BE
FR
LV
PT
IS
TR

CY
DE
LT
SK
LI
HR

CZ
GR
LU
SI
NO

DK
HU
MT
ES
CH

EE
IE
NL
SE
BG

IC-718 #03
(Europe)

IC-718 #04
(Italy)

IC-718 #05
(France)

IC-718 #06
(Spain)

A-5649D-1EX-y
Printed in Japan
© 2000–2007 Icom Inc.
Printed on recycle paper with soy ink.

1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan