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