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I C 718


CHAPTER 1

TABLE OF CONTENTS 1


IMPORTANT .............................................................. i
EXPLICIT DEFINITIONS ................................................... i
PRECAUTIONS ............................................................ i

1 TABLE OF CONTENTS
SUPPLIED ACCESSORIES ................................................. 1

2 PANEL DESCRIPTION .................................................... 2 - 8
Front panel .......................................................... 2
Function display ..................................................... 5
Rear panel ........................................................... 6
Microphone (HM-36).................................................... 8

3 INSTALLATION AND CONNECTIONS.......................................... 9 - 14
Unpacking ............................................................ 9
Selecting a location ................................................. 9
Grounding ............................................................ 9
Antenna connection ................................................... 9
Required connections ................................................. 10
Advanced connections ................................................. 11
Power supply connections ............................................. 12
Liner amplifier connections .......................................... 13
External antenna tuners .............................................. 14

4 FREQUENCY SETTING..................................................... 15 - 19
When first applying power ............................................ 15
Initial setting ...................................................... 15
VFO description1 ..................................................... 16
Frequency setting .................................................... 17
Dial lock function ................................................... 19

5 RECEIVE AND TRANSMIT.................................................. 20 - 34
Mode selection ....................................................... 20
Squelch and RF gain .................................................. 20
Function for receive ................................................. 21
DSP function (option) ................................................ 23
Filter selection ..................................................... 24
Filter setting ....................................................... 25
Function for transmit ................................................ 26
Split frequency operation ............................................ 30
SWR .................................................................. 30
Function for CW ...................................................... 31
Function for RTTY .................................................... 33

6 MEMORY OPERATION ..................................................... 35 - 38
Memory channels ...................................................... 35
Memory channel selection ............................................. 35
Memory channel programming ........................................... 36
Frequency transferring ............................................... 37
Memory clearing ...................................................... 38

7 SCANS ................................................................ 39 - 40
Scan types ........................................................... 39
Preparation .......................................................... 39
Programmed scan operation ............................................ 40
Memory scan operation ................................................ 40

8 SET MODE ............................................................. 41 - 47
General .............................................................. 41
Quick set mode items ................................................. 42-43
Initial set mode items ............................................... 44-47

9 INSTALLATION AND CONNECTIONS ......................................... 48 - 51
Opening the transceiver's case ....................................... 48
Optional bracket and carrying handle ................................. 48
CR-338 HIGH STABILITY CRYSTAL UNIT ................................... 49
UT-102 VOICE SYNTHESIZER UNIT ........................................ 49
UT-106 DSP RECEIVE UNIT .............................................. 50
Optional IF filters .................................................. 50
AT-180 internal switch description ................................... 51

10 MAINTENANCE ......................................................... 52 - 53
Troubleshooting ..................................................... 52
Fuse replacement .................................................... 53
Resetting the CPU ................................................... 53

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

12 OPTIONS ............................................................. 55 - 56

13 CONTROL COMMAND ..................................................... 57 - 58
Remote jack (CI-V) information ...................................... 57

14 INTERNAL VIEWS ...................................................... 59
Top view ............................................................ 59
Bottom view ......................................................... 59

15 INSTALLATION NOTES .................................................. 59
DECLARATION OF CONFORMITY

CHAPTER 2

FRONT PANEL DESCRIPTION


POWER SWITCH [PWR]

Push momentarily to turn power ON.
- 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)


MICROPHONE CONNECTOR [MIC]
Accepts supplied or optional microphone.
- See p. 55 for appropriate microphones.
- See p. 8 for microphone connector information.


HEADPHONE JACK [PHONES] (p. 11)
Accepts headphones
- When headphones are connected, the internal speaker or connected external
speaker does not function.

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

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.

RIT CONTROLS [RIT] (Inner control; p. 21)
Shifts the receive frequency without changing the transmit frequency.
- Rotate the control clockwise to increase the frequency,
or rotate the control counterclockwise to decrease the frequency.
"RIT" appears on the display.
- The shift frequency range is ±1.2 kHz.

IF SHIFT CONTROLS [SHIFT] (Outer control; p. 21)
Shifts the center frequency of the receivers's IF passband.
- Rotate the control colckwise to shift the center frequency higher
or rotate the control counterclockwise to shift the center frequency lower.

LOCK SWITCH [LOCK] (p. 19)
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).

MAIN DIAL
Changes the displayed frequency, selects quick/initial set mode items, etc.

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

CH SWITCH [CH] (p. 35)
Push momentarily to turn the memory channel selectfunction ON or OFF.
- [MEMO] blinks while memory channel select function is turned on.
- Push several times (or push and hold) [DN]/[UP] until desired memory channel appears.
- After pushing [F-INP/ENT], push desired memory 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.

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.

ATTENUATOR SWITCH [ATT] (p. 22)
Push to toggle the 20 dB attenuator function ON and OFF.

TUNER SWITCH [TUNER] (pgs. 28, 29)
Push momentarily to toggle the automatic 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 circuitis bypassed automatically after 20 sec.

SET SWITCH [SET]
Push for 1 sec. to enter the quick set mode. (p. 41)
Pushing and holding [SET], and then push
[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.

MIC COMPRESSOR SWITCH [COMP] (p. 27)
Toggles the Mic. compressor function ON and OFF.

KEYPAD
The keypad can be used for several functions as discribed below:
- [F-INP/ENT], keypad then [FINP/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], [MW], [M-CL], [MIV], [SPL], [SCAN],
[VOX], [NR] (option) and [ANF] (option) switch. (p. 4)

NOISE BLANKER SWITCH [NB] (p. 22)
Toggles the noise blanker ON and OFF. The noise blanket reduces pulse-type noise
such as that generated by automobile ignition systems. This function is not effective
against non pulse-type noise.

Push [NB] for 1 sec to enter the noise blanker level setting condition.

QUICKTUNING STEP SWITCH [TS] (pgs. 18, 19)
Selects a quick tuning step or turns the quick tuningstep 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.

FILTER SWITCH [FIL] (p. 24)
Push momentarily to toggle between the pre-programmed normal, wide and narrow IF filters for the
selected operating mode.

MODE SWITCHES [LSB/USB]/[CW/CWR]/[RTTWRTTY-R]/[AM] (p. 20)
Push to toggle an operating mode.
- Push[MODEl 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. "REV" appears on the display.


VFO/MEMORY SWITCH/1 [V/M.l] (pgs. 16, 35)
Toggles the operating mode between VFO mode or memory mode when pushed.

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.

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

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,

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.

FRQUENCY INPUT/ENTER SWITCH [F-INP/ENT] (pgs. 17, 35)
[F-INP/ENT], then keypad then [FINP/ENT]
- Direct frequency input. (p. 17)
[CH] then [F-INP/ENT], then keypad then [FINP/ENT]. Push [CH]
- Direct memory number selection. (p.35)

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.

VOX SWITCH/9 [VOX-9] (p. 27)
Turn the VOX function ON or OFF when pushed in SSB modes.

MIV SWITCH/6 [MV°6] (p. 37)
Transfers the memory contents to VFO when pushed for 1 sec.

MEMORY CLEAR SWITCH/5 [M=CL°5] (p. 38)
Clears the selected readout memory channel contents when pushed for 1 sec. in memory mode.
- [BLANK] appears above the memory channel number.

VFO SELECT SWITCH/3 [A/Bo3] (p. 16)
Toggles between VFO A or VFO B in VFO mode.
Toggles between transmission VFO and reception VFO during split operation.

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.


FUNCTION DISPLAY

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

RECEIVE INDICATOR
Appears while receiving a signal or when the squelch is open.

TUNE INDICATOR
Appears while the automatic tuning function is activated.

TRANSMIT INDICATOR
Appears while transmitting.

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" appears when the VOX function is selected in quick set mode.
"COM" appears when the speech compressor activates in SSB mode.
"SCAN" appears when the scan function is activated. Flashes when scan is paused.

DSP UNIT INDICATOR (p. 23)
Appears when an optional UT-106 DSP UNIT is installed.

AUTOMATIC NOTCH FILTER INDICATOR (p. 23)
Appears when the optional Automatic Notch Filter function is in use.

NOISE REDUCTION INDICATOR (p. 23)
Appears when the optional Noise Reduction function is in use.

SIGNAL/SQL/RF-GAIN METER
Functions as an S-meter while receiving.
Functions as a Power, ALC or SWR meter while transmitting. (p.26)

VFO/MEMORY INDICATOR (p. 16)
"VFO A"or "B"appears when VFO mode is selected.
"MEMO" appears when memory mode is selected.

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

BLANK INDICATOR
Shows that the displayed memory channel is not programmed.
- This indicator appears both in VFO and memory mode.

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

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

FREQUENCY READOUT
Shows the operating frequency.

REVERSE INDICATOR
Appears when the CW reverse or RTTY reverse mode is selected.

WIDE/NARROW FILTER INDICATORS (pgs. 32, 34)
"W" appears when the wide IF filter is selected.
"N" appears when the narrow IF filter is selected.

PROGRAMMABLE TUNING STEP INDICATORS
Appears when the programmable tuning step is selected.

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


Rear panel

ANTENNA TERMINAL [ANT] (p. 10)
Connects a 50 ohm antenna with a PL-259 connector and a 50 ohm coaxial cable.

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

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

CI-V REMOTE CONTROL JACK [REMOTE] (p. 57)
Designed for use with a personal computer for remote operation of transceiver functions.

EXTERNAL SPEAKER JACK [EXT SP] (p. 11)
Connects an 8 ohm external speaker, if desired,
- When an external speaker is connected, the internal speaker does not function.

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.


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.

ALC INPUT JACK [ALC]
Connects to the ALC output jack of a non-lcom linear amplifier.

SEND CONTROL JACK [SEND] (p. 14)
Goes to ground while transmitting to control external equipments such as a liner amplifier.
- Max. control level: 16 V DC/2 A

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

Microphone (HM-36)

UP/DOWN SWITCHES [UP]/[DN]
Change the selected readout frequency or memory channel.
- Continuous pushing changes the frequency or memory channel number continuously.
- The [UP]/[DN] switch can simulate a key paddle. Preset in the CW PADDL in initial set mode. (p. 31)

PTT SWITCH
Push and hold to transmit; release to receive.


CAUTION: DO NOT SHORT PIN 2 TO GROUND AS THIS CAN DAMAGE THE INTERNAL 8V REGULATOR.
CHAPTER 3

INSTALLATION AND CONNECTIONS


UNPACKING

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

For a description and a diagram of accessory equipmentincluded with the IC-718,
see 'Supplied accessories'on p. 1 of this manual.

SELECTING A LOCATION

Select a location for the transceiver that allows adequateair 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 dependingon your operating conditions.

GROUNDING

To prevent electrical shock, television interference (TVI), broadcast interference (BCI) and other
problems, ground the transceiver through the GROUND terminal on the rear panel.

For best results, connect a heavy gauge wire or strap to a long earth-sunk copper rod. Make the
distance between the [GND] terminal and ground as short as possible.

WARNING: NEVER connect the [GND] terminal to a gas or electric pipe, since the connectioncould
cause an explosion or electric shock.

ANTENNA CONNECTION

For radio communications, the antenna is of critical importance,along with output power and sensitivity.
Select antenna(s), such as a well-matched 50 antenna, and feedline. 1.5:1 or better of Voltage Standing
Wave Ratio (VSWR) is recommended for your desired band. Of course, the transmission line should be a
coaxial cable.

CAUTION: Protect your transceiver from lightning by using a lightning arrestor.

Antenna SWR
Each antenna is tuned for a specified frequency range and SWR may be increased out-of-range. When the SWR
is higher than approx. 2.0:1, the transceiver's power drops to protect the final 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.

POWER SUPPLY CONNECTIONS

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

CAUTION: Before connecting the DC 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-lcom power supply.
- DC power cable polarity is correct.
Red : positive terminal.Black : negative G terminal

CHAPTER 4

FREQUENCY SETTING


When first applying power (CPU resetting)

Before first applying power, make sure all connectionsrequired 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.
1. Make sure the transceiver power is OFF.
2. 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.
3. 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 normal and does not indicate any equipment malfunction.

Initial settings

After resetting the transceiver, set controls and switches as shown in the figure below.
CCW: counterclockwise
[METER]: Po
[POWER]: OFF
[NB], [COMP]: OFF
[P.AMP], [ATT],: OFF
[AF]: Max. CCW
[RF/SQL]: 12 o'clock
[LOCK]: OFF
[RIT]: Center
[IF SHIFT]: Center

Turn power ON, then check the display. If any of the following indicators appear, turn them OFF as follows:
- Quick tuning step indicator : Push [TS]
- 1 Hz frequency readout : Push [TS] for 1 sec (while quick tuning step is OFF)
- RIT indicator "RIT" : Center
- Split indicator "SPL" : Push [SPL]

VFO DESCRIPTION

VFO is an abbreviation of Variable Frequency Oscillator,and traditionally refers to an oscillator.

The IC-718 VFO can store a frequency and an operatingmode.

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.

DIFFERENCE BETWEEN VFO AND MEMORY MODE

VFO MODE
Each VFO shows a frequency and operating mode. If the frequency or operating mode is changed,
the VFO automatically memorizes the new frequency or new operating mode.

When the VFO is selected from another VFO or memorymode, the last-used frequency and operating mode
for that VFO appears.

[EXAMPLE FOR VFO MODE]
1. VFO is selected.
2. The frequency is changed.
3. Memory mode is selected.
4. VFO is selected again.

MEMORY MODE (pgs. 3538)
Each memory channel shows a frequency and operatingmode 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 memorized frequency
and operating mode appear.

[EXAMPLE FOR MEMORY MODE]
1. Memory channel 1 is selected.
2. The frequency is changed.
3. Another memory channel is selected.
4. Memory channel 1 is selected again.

FREQUENCY SETTING
Using the tuning dial
1. Push [UP] or [DN] one or more times to select the desired ham band.
2. Select the desired operating mode with the mode switch. (p. 20).
3. Rotate the tuning dial to set the desired frequency

For general coverage receiver use
1. The IC-718 has a general coverage receiver band.
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).

Direct frequency entry with keypad
The transceiver has a keypad for direct frequency entry as described below.
1. 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.
2. Push [.] on the keypad.
3. 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.
4. 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.

Band stacking register
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.

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
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

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.

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

1. Push [TS], the programmable tuning step indicator,",down arrow" then appears above the 1 kHz.
- Rotating the tuning dial changes the frequency according to the set tuning step.
2. Push [TS] for 2 sec. while the programmable tuning step indicator appears to enter the tuning
step set mode.
3. Rotate the tuning dial to set the desired tuning step.
4. Push [TS] to exit the tuning step set mode.
5. Rotate the tuning dial to change the frequency according to the set tuning step.

1 Hz and 10 Hz tuning steps
When the programmable tuning step, "down arrow" disappear, rotating the tuning dial changes the
frequency in increments of 1 or 10 Hz.

1. Push [TS] one or more times until the programmable tuning step indicator "down arrow" disappears.
2. Push [TS] for 1 sec. to toggle between the 1 and 10 Hz step settings.
- When the 1 Hz step is selected, the 1 Hz digit appears in the frequency indication; when the
10 Hz step is selected,the 1 Hz digit disappears from the frequency indication.

Rotating the tuning dial changes the frequency in 10 Hz steps,
Push [TS] for 1 sec.
Rotating the tuning dial changes the frequency in 1 Hz steps.

Dial lock function

The dial lock function prevents accidental changes caused by the tuning dial. The lock function
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.


CHAPTER 5

RECEIVE AND TRANSMIT

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.

OPERATING MODE SELECTION

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

RF gain and Squelch

The IC-718 uses the same control, [RF/SQL], to adjus teither 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 initial set mode (p. 44).

[RF/SQL] control priority

Set Mode Setting USB, LSB, CW, RTTY AM
PS 9RF/SQL (default) RF/SQL RS/SQL
At (Auto) RF GAIN SQL*
Sq (SQL) SQL SQL*

* 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.

Chapter 6

MEMORY OPERATION

Memory channels

The transceiver has 101 memory channels. The memory mode is very useful for quickly changing to
often-used frequencies. All 101 memory channels are tuneable which means the programmed frequency
can be tuned temporarily with the tuning dial, etc. in memory mode.

MEMORY CHANNEL: Regular memory channels
MEMORY CHANNEL NUMBER: 1 - 99
CAPABILTIY: One frequency and one mode in each memory channel
TRANSFER TO VFO: Yes
OVERWRITING: Yes
CLEAR: Yes

MEMORY CHANNEL: Scan edge memory channels
MEMORY CHANNEL NUMBER: P1, P2
CAPABILTIY: One frequency and one mode in each memory channel as scan edges for programmed scan.
TRANSFER TO VFO: Yes
OVERWRITING: Yes
CLEAR: No

Memory channel selection
- Using the [UP] or [DN] keys
1. Push [V/M] to select memory mode. "MEMO" appears.
2. Push [CH] to enter memory CH select mode. "MEMO" blinks.
3. Push [UP] or [DN] several times to select the desired memory channel.
4. Push and hold [UP] or [DN] for continuous selection.
Push [CH] to exit memory CH select mode.
5. To return to VFO mode, push [V/M] again.

Using the keypad
1. Push [V/M] to select memory mode. "MEMO" appears.
2. Push [CH] to enter memory CH select mode. "MEMO" blinks.
3. Push [F-INP/ENT], then push the desired memory channel number using the keypad.
4. Push [F-INP/ENT] to select the desired memory channel.
5. Push [CH] to exit memory CH select mode.

Memory channel programming

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

Programming in VFO mode
1. Set the desired frequency and operating mode in VFO mode,
2. Push [CH], then push [UP] or ['DN] several times to select the desired memory channel.
- "MEMO" blinks
- "BLANK" appears if the selected memory channel is a blank channel
3. Push [MW] for 1 sec. to program the displayed frequency and operating mode into the memory channel.
4. Push [CH] to exit memory channel select mode.

Programming in memory mode

1. Select the desired memory channel with [UP ] or ['DN] in memory mode.
-"BLANK" appears if the selected memory channel is a blank channel (and does not have contents).
2. Set the desired frequency and operating mode in memory mode.
- To program a blank channel, use direct frequency entry with the keypad in advance,
3. 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.

Frequency transferring

The frequency and operating mode in a memory channel can be transferred to the VFO.
Frequency transferring can be performed in either VFO mode or memory mode.

Transferring in VFO mode

This is useful for transferring programmed contents to VFO.

1. Select VFO mode with (V/M).
2. Push [CH], then select the memory channel to be transferred with [UP] or [DN].
-"BLANK" appears if the selected memory channel is a blank channel.
3. Push [M/V] for 1 Sec. to transfer the frequency and operating mode.
-Transferred frequency and operating mode appear on the frequency readout.
4. Push [CH] to exit memory channel select mode.

Transferring in memory mode
This is useful for transferring frequency and operating mode while operating in memory mode.

When you have changed the frequency or operating mode in the selected memory channel:
- Displayed frequency and mode are transferred
- Programmed frequency and mode in the memory channel are not transferred, and they remain
in the memory channel.

1. Push [CH], then select the memory channel to be transferred with [UP ] or [ DN] in memory mode.
And, set the frequency or operating mode if required.
2. Push [M/V] for 1 sec to transfer the frequency and operating mode.
Displayed frequency and operating mode are transferred to the VFO.
3. To return to VFO mode, push (V/M) momentarily.

Memory clearing

Any unnecessary memory channels can be cleared. The cleared memory channels become blank channels.

1. Select memory mode with (V/M).
2. Push [CH], then select the memory channel to be cleared with [UP] or [ DN]
3. Push [M-CL] for 1 sec. to clear the contents.
The programmed frequency and operating mode disappear.
"BLANK" appears.
4. To clear other memory channels, repeat steps 2 and 3.


CHAPTER 7

Scan types

PROGRAMMED SCAN
Repeatedly scans between two scan edge frequencies (scan edge memory channels P1 and P2).
This scan operates in VFO mode.


MEMORY SCAN
Repeatedly scans all programmed memory channels.
This scan operates in memory mode.

Preparation

Channels
For programmed scan/auto memory write scan: Program scan edge frequencies 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

Scan start with squelch open:
Programmed Scan: The scan continues until it is stopped manually, and does not pause even
if it detects signals
Memory Scan: Scan pauses on each channel when the scan resume is ON; not applicable when OFF.

Scan start with squelch open closed:
Programmed scan and memory scan: 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 disappears while scan is paused,
scan resumes 2 sec. later.

Programmed scan operation

1. Select VFO mode with [V/M].
2. Select the desired operating mode.
The operating mode can also be changed while scanning.
3. 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.
4. Push [SCAN] to start the programmed scan.
"SCAN" appears while scanning.
5. When the scan detects a signal; the scan stops, pauses or ignores it depending on the resume
setting and the squelch condition.
6. To cancel the scan, push [SCAN].

If the same frequencies are programmed into the scan edge memory channel P1 and P2, programmed scan
does not start.

Memory scan operation
1. Select memory mode with [V/M].
2. Select the desired operating mode.
The operating mode can also be changed while scanning.
3. 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.
4. Push [SCAN] to start the memory scan.
"SCAN" appears while scanning.
5. When the scan detects a signal, the scan stops, pauses or ignores it depending on the
resume setting and the squelch condition.
6. To cancel the scan, push [SCAN].

2 or more memory channels must be programmed for memory scan to start.

Chapter 8: SET MODE

General

Set mode is used for programming infrequently changed values or conditions of functions.
The IC-718 has 2 separate set modes: quick set mode and initial set mode.

Quick set mode operation
1. While power is ON, push [SET] for 1 sec.
Quick set mode is selected and one of its items appears.
2. Push [UP ] or [ DN] to select the desired item.
3. Rotate the main dial to set the values or conditions for the selected item.
4. Repeat 2 and 3 to set other items.
5. To exit quick set mode, push [SET] momentarily.

Initial set mode operation
1. Push [POWER] for 1 sec. to turn power OFF,
2. While pushing and holding [SET], push [POWER] to turn power ON.
Initial set mode is selected and one of its items appears.
3. Push [UP] or [ DN] to select the desired item.
4. Rotate the main dial to set the values or conditions for the selected item.
5. Repeat 3 and 4 to set other items.
6. To exit initial set mode, push [POWER] for 1 sec. to turn power OFF.
7. Push [POWER] to turn power ON again.
The condition selections in initial set mode are now effective.


Quick set mode items

1) 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.

2) 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.

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

4) 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).

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

6) 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).

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

8) BK-IN delay
This 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.

9) 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. Except 40, 44, 47, 50, 52, 54, 56, 57, 59

10) 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).

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

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

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

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 operating frequency enters or exits a transmit frequency range. This functions
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.

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 does 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.

AM Noise blanker
When this item is set to ON, the noise blanker function is available on AM mode. This is useful
when communicating in AM mode (the noise blanker function should not be used when listening to
regular AM 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 rotationof 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 instead of the paddle.
The default is n (normal).

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 OFF 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 VOICE SYNTHESIZER UNIT is installed, you can select between English and
Japanese as the language. The default is En (English).

Speech speed
When an optional UT-102 VOICE SYNTHESIZER UNIT 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.

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 IC718'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
Transceive operation is possible with the 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.

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 filter is installed, this selection is necessary, otherwise the filters
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 IF 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)

Chapter 9

Opening the transceiver's case

Follow the case and cover opening procedures 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.

Remove the 5 screws from the top of the transceiver and 4 screws from the sides, then lift up the
top cover. Remove the 5 screws from the bottom of the transceiver, then remove the bottom cover.

Optional bracket and carrying handle

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.

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.


CR-338 HIGH STABILITY CRYSTAL UNIT

By installing the CR-33, the total frequency stability of the receiver will be improved.
- Remove the bottom cover as shown in the diagram before.
- Disconnect W2 from J4401 (MAIN unit) and W3 from J4201 (MAIN unit).
- Remove 9 screws from the PLL unit, disconnect P4 from J201 (MAIN unit) and P2 from J401 (MAIN unit),
then remove the PLL unit.
- Remove the supplied internal crystal and replace with the CR-338.
- Return the PLL unit, plugs and flat cables to their original positions.
- Adjust the reference frequency at C16 using a frequency counter if desired.
Connect the frequency counter to P. 2 (PLL unit).
- Return the bottom cover to its original position.

UT-102 VOICE SYNTHESIZER UNIT

The UT-102 announces the received frequency, mode, S-meter level and current time in a clear,
electronically-generated voice, in English (or Japanese). Push [LOCK] for 1 sec. to announce the
frequency, etc.
- Remove the protective paper attached to the bottom of the UT-102 to expose the adhesive strip.
- Plug UT-102 into J2501 on the MAIN unit as shown at right.
- Return the bottom cover to its original position.

UT-106 DSP RECEIVE UNIT

The UT-106 provides AF DSP functions such as noise reduction and auto notch.
- Remove the bottom cover.
- Slide the insulating case onto the UT-106
- Remove the connection cable (P2601) from J2602 on the MAIN unit. Connect the cable
into J1 on the UT-106.
- Plug the connection cable (P1) from the UT-106 to J2602 on the MAIN unit.
- Plug the flat cable into J3 on the UT-106 and to J2603 on the MAIN unit.
- Take care regarding the conductor direction.
- Turn the UT-106 unit over. (Fig. 2)
- No need to fix with an adhesive strip, etc.
- 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.
- Return the bottom cover to its original position.

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)


Installation
- Remove the bottom cover as shown on the p. 48.
- 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.
- Install the desired 455 KHz filter as shown in the diagram below.
- Mounting the filter with supplied washers and nuts.
- Solder the 4 leads.
- 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.

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.

Remove the top cover of the AT-180. Set the tuner switches to the desired positions according to the
table below.
SW: S1
POSITION: A (default)
OPERATION: The tuner operating condition is set by S2 described below.

SW: S1
POSITION: B
OPERATION: 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.

SW:
POSITION: C
OPERATION: 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
the "D" position below.

SW: S2
POSITION: D
OPERATION: NORMAL CONDITION
The tuner tunes when the SWR is higher than 1.5:1. Therefore, the tuner activates
only when tuning is necessary.

Specifications for the AT180
- Frequency coverage : 1.9-54 MHz
- Input impedance : 50 ohm
- Maximum input : 120 W power
- Minimum tuning : 8 W power
- Matching impedance : 16.7-150 ohm(HF band)
- Range :20-125 ohm (50 MHz band)
- Tuning accuracy :Less than SWR 1.5:1
- Insertion loss: Less than 1.0 dB (after tuning)
- Power supply requirements: 13.8 V DC/1 A (supplied from the transceiver's ACC socket)
- Dimensions (mm/in): 167(W) x58.6(H) x225(D)
6 9/16(W) x 2 5/17(H) x 8 7/8 (D)
- Weight: 2.4 kg; 5 Ib 4 oz
- Supplied accessories: coaxial cable (1 m), ACC cable (DIN 13 pins)


Chapter 10: MAINTENANCE

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 From Dealer or Service Center.

Power does not come on when the [POWER] switch is pushed.
- DC power cable is improperly connected. Reconnect the DC power cable correctly. (p. 12)
- Fuse is blown. Check for the cause, then replace the fuse with a spare one. (p.53)
(Fuses are installed in the DC power cable and the internal PA unit.)
- Power Supply not turned ON.

No sound comes from the speaker.
- Volume level is too low. Rotate [AF] clockwise to obtain a suitable listening level. (pg.2)
- The squelch is closed. Rotate [RF/SQL] to 10 o'clock position to open the squelch. (pg.2)
- The transceiver is in the transmitting condition. Check the SEND line of an external unit,
if desired. (pg. 6)

Sensitivity is low. (all on pg. 3)
- The antenna is not connected properly. Reconnect to the antenna connector.
- The antenna for another band is connected. Connect an antenna suitable for the operating frequency.
- The antenna is not properly tuned. Push [TUNER] for 2 sec. to manually tune the antenna.
- The attenuator is activated. Push [ATT] to select "ATT" OFF.

Receive audio is distorted.
- The operating mode is not selected correctly. Select a suitable operating mode. (p. 20)
- IF SHIFT function is activated. Rotate the SHIFT control to center position. (p. 21)
- Noise blanker function is activated. Push [NB] to turn the function OFF. (p. 21)
- Preamp is activated. Push [P.AMP] to turn the function OFF. (p. 22)
- The noise reduction is activated and the [NR] control is set too high. Set the [NR] control
for maximum readability. (p. 23)

Transmitting is impossible.
- The operating frequency is not set to a ham band. Set the frequency to a ham band. (p. 170

Output power is too low.
- [RF POWER] is set too low. Set [RF POWER] to a suitable position. (p. 42)
- [MIC GAIN] is set too low. Set [MIC GAIN] to a suitable position. (p. 42)

The antenna for another band is selected.
- Select an antenna suitable for the operating frequency (p. 10)

The antenna is not properly tuned.
- Push [TUNER] for 2 sec. to manually tune the antenna. (p. 3)

No contact possible with another station.
- RIT function is activated. Push [RIT] to turn the function OFE (p. 21)
- Split frequency function is activated. Push [SPLIT] to turn the function OFF. (pgs. 7,31,32)

Transmitted signals are distorted.
- [MIC GAIN] is set too high. Set [MIC GAIN] to a suitable position. (p. 2)
- [COMP] function is activated. Turn [COMP] off. (p. 27)

Programmed scan does not stop.
- Squelch is open. Set [RF/SQL] to the threshold point. (p. 3)
- [RF/SQL] is assigned to RF gain control and squelch is open. Reset [RF/SQL] control assignment
and set it to the threshold point. (p. 30)

Programmed scan does not start.
- The same frequencies have been programmed in scan edge memory channels P1 and P2. Program different
frequencies in scan edge memory channels P1 and P2. (p. 40)

Memory scan does not start.
- 2 or more memory channels have not been programmed. Program 2 or more memorychannels. (p. 40)

The displayed frequency does not change properly.
- The dial lock function is activated. Push [LOCK] to deactivate the function. (p. 6)
- A quick set mode screen is selected. Push [SET] to exit the quick set mode. (p. 41)
- The internal CPU has malfunctioned. Reset the CPU. (p. 53)

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 IC-718 has 2 types of fuses installed 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.

Remove the top cover as shown on p. 48 Replace the circuitry fuse. Replace the top cover.

Resetting the CPU

Resetting CLEARS all programmed contents in memory channels and returns programmed values
in set mode to their defaults.

When first applying power or when the function seems to be displaying erroneous information,
reset the CPU as follows:
1) Make sure transceiver power is OFF.
2) While pushing [UP] and I DN], push [PWR] to turn power ON.
- The internal CPU is reset.
- The transceiver displays its initial VFO frequencies when resetting is complete.

Chapter 11: SPECIFICATIONS

General

Frequency coverage
Receive 0.03-29.999999 MHz *1

Transmit 1.800 - 1.999999 MHz.*2
2 3.500 - 3.999999 MHz.*2
2 7.000 - 7.300000 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

*1 Guaranteed range: 0.5-29.999999 MHz
*2 Varies according to version

Mode: USB, LSB, CW, RTTY, AM

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

Frequency stability: Less than +-200 Hz from 1 min. to 60 min. after power on. After that rate
of stability less than +-30 Hz/hr. at +25°C (+77°F). Temperature fluctuations 0°C to
+50°C (+32°F to +122°F) less than +-350 Hz.

Power supply requirement: 13.8V DC +-15% (negative ground)

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

Operatable temp. range: -10°C to +60°C; +14°F to +140°F

Antenna connector: SO-239 (50 ohm)

Dimensions: 240(W) x 95(H) x 239(D) mm (projections not included)
97 7/8(W) x 3 3/4(H) x 9 13/32 (D) in

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

ACC connector: 13 pin

REMOTE connector: 2-conductor 3.5 (d) mm (1/8')


Transmitter
Output power: SSB, CW, RTTY 2-100 W
AM 2-40 W

Modulation system: SSB Balanced modulation
AM Low level modulation

Spurious emissions: Less than -50 dB below peak output power

Spurious freq.: Below 30 MHz: -50 dB
Above 50 MHz: -60 dB
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 ohm)

Key connector: 3-conductor 6.5 (d) mm (1/4")

SEND/ALC connector: Phono (RCA)

Receiver

Receive system: Double-conversion superheterodyne system

Sensitivity: SSB, CW, RTTY 0.16 uV (1.8-29.999999 MHz)
AM 13 uV (0.5-1.799999 MHz)
2 uV (1.8-29.999999 MHz)

Squelch sensitivity (threshold): SSB, CW, RTTY Less than 5.6 uV

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 (at 13.8 V DC): More than 2.0 W at 10% distortion with an 8 ohm load

PHONES connector: 3-conductor 6.35 (d) mm 1/4 "

External SP connector: 2-conductor 3.5 (d) mm 1/8 " 8 ohm


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

CHAPTER 12

IC-PW1 HF + 50 MHz 1 KW LINER AMPLIFIER

Full-duty 1 kW linear amplifier including an automatic antenna tuner. Has automatic tuning and band
selection capability. Full break-in (QSK) operation is possible. The amplifier/power supply unit and
the remote contro lunit are separated.

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. ?? for AT- 180 specifications.


AH-4 HF + 50 MHz AUTOMATIC 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


AH-2b ANTENNA ELEMENT
A 2.5 m long antennaelement for mobile operation with the AH4.
- Frequency coverage: 3.5-28 MHz bands with the AH-4

PS-85 DC POWER SUPPLY
Light weight switching regulator system power supply.
- Output voltage: 13.8 V DC
- Max. current drain: 20 A

SM-8 DESKTOP MICROPHONE
Including 2 connection cables for simultaneous connection of 2 transceivers.
Has [UP]/[DOWN] switches. The OPC-589 is necessary to use microphone.

SM-20 DESKTOP MICROPHONE
Unidirectional, electret microphone for base station operation. Includes [UP]/[DOWN]
switches and a low cut function.

SM-6 DESKTOP MICROPHONE
Electret condenser-type desktop microphone.

HM-36 HAND MICROPHONE
Hand microphone equipped with [UP]/[DOWN] switches. Same as supplied.

SP-2OEXTERNALSPEAKER
4 audio filters; headphone jack; can connect to 2 transceivers.
- Input impedance: 8 ohm
- Max. imput power: 5 W

SP-21EXTERNALSPEAKER
Designed for base station operation.
- Input impedance: 8 ohm
- Max. input power: 5 W


SP-7 EXTERNALSPEAKER
Compact speaker for base station operation. Height can be adjusted for your convenience.

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)


UT-106 DSP RECEIVE UNIT
Provides AF DSP functions such as noise reduction and auto notch.


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).

CR-338 HIGH-STABILITY CRYSTAL UNIT
Contains a temperature-compensating oven heater and crytal unit for improved frequency stability.
- Frequency stability: +-0.5 ppm

MB-23 CARRYING HANDLE
Carrying handle, convenient for portable operation.

IC-MB5 MOBILE MOUNTING BRACKET
Transceiver mounting bracket for mobile operation.

CT-17 CI-V LEVEL CONVERTER
For remote receiver control using a personal computer. You can change frequencies,
operating mode, memory channels, etc.

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.

OPC-599 ADAPTER CABLE
13-pin, ACC connector to 7-pin + 8-pin ACC connector.

CHAPTER 13: CONTROL COMMAND

Remote jack (CI-V)information
oCI-V connection example
The transceiver can be connected through an optional CT-17 CI-V LEVEL CONVERTER to a personal
computer equipped with an RS-232C port. The Icom Communications Interface-V (CI-V) controls the
following functions of the receiver.

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 formats. Data formats differ according to
command numbers. A data area or sub command is added for some commands, BC-25.

 

 

 


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