man_ic-7400.pdf

INSTRUCTION MANUAL

HF/VHF

ALL MODE TRANSCEIVER

i7400

FOREWORD

PRECAUTIONS

We understand that you have a choice of many differ-

ent radios in the market place. We want to take a cou-

ple of moments of your time to thank you for making

the IC-7400 your radio of choice, and hope you agree

with Icom’s philosophy of “technology ﬁrst”.Many hours

of research and development went into the design of

your IC-7400.

R WARNING HIGH VOLTAGE! NEVER attach an

antenna or internal antenna connector during transmis-

sion. This may result in an electrical shock or burn.

R NEVER apply AC to the [DC13.8V] jack on the trans-

ceiver rear panel. This could cause a ﬁre or ruin the trans-

ceiver.

R NEVER apply more than 16 V DC, such as a 24 V

battery, to the [DC13.8V] jack on the transceiver rear

panel. This could cause a ﬁre or ruin the transceiver.

R NEVER let metal, wire or other objects touch any in-

ternal part or connectors on the rear panel of the trans-

ceiver. 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 tem-

peratures 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 envi-

ronments or in direct sunlight.

AVOID placing the transceiver against walls or putting

anything on top of the transceiver. This will obstruct heat

dissipation.

Place unit in a secure place to avoid inadvertent use by

children.

During mobile operation, DO NOT operate the transceiver

without running the vehicle’s engine. When the trans-

ceiver’s power is ON and your vehicle’s engine is OFF,

the vehicle’s battery will soon become exhausted.

Make sure the transceiver power is OFF before starting

the vehicle. This will avoid possible damage to the trans-

ceiver by ignition voltage spikes.

During maritime mobile operation, keep the transceiver

and microphone as far away as possible from the magnetic

navigation compass to prevent erroneous indications.

BE CAREFUL! The heatsink will become hot when oper-

ating the transceiver continuously for long periods.

BE CAREFUL! If a linear ampliﬁer is connected, set the

transceiver’s RF output power to less than the linear am-

pliﬁer’s maximum input level, otherwise, the linear ampli-

ﬁer will be damaged.

Use Icom microphones only (supplied or optional). Other

manufacturer’s microphones have different pin assign-

ments, and connection to the IC-7400 may damage the

transceiver.

FEATURES

• 32-bit Floating point DSP and 24-bit AD/DA converter

• DSP IF Filter creates 102 types of ﬁlter

• All mode capability covering 160–2 m

• 100 Watt continuous duty cycle

• All mode digital modulation and demodulation

• RTTY demodulator and decoder

• Twin Pass Band Tuning

• RF speech compression with selectable pass band

• Microphone Equalizer

• SSB/CW synchronous tuning

IMPORTANT

READ THIS INSTRUCTION MANUAL

CAREFULLY before attempting to operate the

transceiver.

SAVE THIS INSTRUCTION MANUAL. This

manual contains important safety and operating in-

structions for the IC-7400.

EXPLICIT DEFINITIONS

WORD DEFINITION

R WARNING Personal injury, ﬁre hazard or electric

NOTE

If disregarded, inconvenience only. No

risk or personal injury, fire or electric

shock.

shock may occur.

CAUTION Equipment damage may occur.

TABLE OF CONTENTS

FOREWORD ..................................... i

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

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

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

TABLE OF CONTENTS ................... ii

Operating CW ............................... 27

Electronic keyer functions ............ 29

Operating RTTY (FSK) ................. 35

RTTY functions ............................. 36

Operating AM ............................... 40

Operating FM ............................... 41

Repeater operation ....................... 44

Preparation ................................... 68

Voice squelch control function ...... 69

Scan set mode ............................. 69

Programmed scan/Fine programmed

scan .............................................. 70

Memory scan operation ................ 71

Select memory scan ..................... 71

∂F scan operation and Fine ∂F scan

...................................................... 72

Tone scan/DTCS code scan

operation ...................................... 73

QUICK REFERENCE GUIDE ..... I – X

Installation ....................................... I

5 FUNCTIONS FOR RECEIVE

........................................ 46 – 53

Operation ....................................... III

Your ﬁrst contact ........................... IV

Simple band scope ....................... 46

Ready to call CQ? ......................... IX

Preamp/Attenuator ....................... 47

9 ANTENNA TUNER OPERATION

......................................... 74–76

1 PANEL DESCRIPTION ........ 1 – 12

Front panel ..................................... 1

Rear panel ...................................... 7

LCD display .................................... 9

Multi function switches .................. 11

Microphone (HM-36) .................... 12

RIT function .................................. 47

AGC function ................................ 48

IF ﬁlter selection ........................... 49

Antenna connection and selection 74

IF (DSP) ﬁlter shape ..................... 50

Antenna tuner operation ............... 75

Noise blanker ............................... 50

Optional external tuner operation . 76

Meter peak hold function .............. 50

Twin PBT operation ...................... 51

10 DATA COMMUNICATION .. 77 – 79

Connections ................................. 77

Packet (AFSK) operation .............. 78

Adjusting the TNC output level ..... 79

Data transmission speed .............. 79

2 INSTALLATION AND

CONNECTIONS ................ 13 – 17

Noise reduction ............................ 52

Notch function .............................. 52

Dial lock function .......................... 52

Unpacking .................................... 13

Voice squelch control function ...... 53

Selecting a location ...................... 13

Grounding ..................................... 13

6 FUNCTIONS FOR TRANSMIT

............................................ 54 – 60

VOX function ................................ 54

Break-in function .......................... 55

∂TX function ................................ 56

Monitor function ............................ 56

Speech compressor ..................... 57

Transmit ﬁlter width selection ....... 57

Split frequency operation .............. 58

Quick split function ....................... 59

Measuring SWR ........................... 60

11 SET MODE ......................... 80–88

Antenna connection ...................... 13

General set mode ......................... 80

Required connections ................... 14

Tone control set mode .................. 88

Advanced connections ................. 15

Power supply connections ............ 16

12 OPTION INSTALLATION .. 89 – 90

Opening the transceiver’s case .... 89

UT-102 VOICE SYNTHESIZER UNIT ... 89

CR-338 HIGH STABILITY CRYSTAL UNIT

..................................................... 90

Linear ampliﬁer connections (not

usable in European countries)....... 17

External antenna tuner

connections .................................. 17

3 BASIC OPERATION .......... 18 – 25

When ﬁrst applying power

(CPU resetting) ............................. 18

Initial settings ................................ 18

Selecting an operating band ........ 19

Selecting VFO/memory mode ...... 20

VFO operation .............................. 20

Frequency setting ......................... 21

Operating mode selection ............ 23

Volume setting .............................. 23

Squelch and receive (RF)

sensitivity ...................................... 24

Basic transmit operation ............... 25

13 MAINTENANCE ................. 91–93

Trouble shooting ........................... 91

7 MEMORY OPERATION ..... 61 – 67

Fuse replacement ......................... 92

Memory channels ......................... 61

Tuning dial brake adjustment ....... 92

Memory channel selection ............ 61

Resetting the CPU ........................ 93

Programming a memory ............... 62

Frequency calibration (approximate)

..................................................... 93

Memory clearing ........................... 62

Selecting the call channel ............. 63

Programming the call channel ...... 63

14 CONTROL COMMAND ...... 94–98

Remote jack (CI-V) information .... 94

Frequency transferring ................. 64

Programming scan edges ............ 65

Assigning memory names ............ 66

15 SPECIFICATIONS ..................... 99

Memo pads ................................... 67

16 OPTIONS................................. 100

4 RECEIVE AND TRANSMIT 26–45

Operating SSB ............................. 26

8 SCANS .............................. 68 – 73

Scan types .................................... 68

17 ABOUT CE ...................... 101–102

SUPPLIED ACCESSORIES

The transceiver comes with the following accessories.

Qty.

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

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

e Spare fuses (FGB 30 A) .................................... 2

r Spare fuse (FGB 5 A) ........................................ 1

t CW keyer plug (AP-330) .................................... 1

*The illustration shows OPC-025D. However, OPC-639 is

supplied with versions, which “CE” symbol on the serial

number.

ert

Icom, Icom Inc. and the logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United King-

dom, Germany, France, Spain, Russia and/or other countries.

QUICK REFERENCE GUIDE

Installation

1. Install a ground system for DC noise suppression

and RFI suppression

2. Install your DC power supply

3. Install lightning protection. This will help protect

more than your gear.

4. Install and connect an antenna system for the ap-

propriate bands of operation

5. Connect other peripheral equipment. This includes

microphones, headsets, TNC, amplifiers and any

other equipment necessary to make your shack

complete.

1. Grounding your Shack

Although your radio will operate by connecting the DC

power supply and antenna, it is necessary to have a

good ground system in your shack. A ground connec-

tion is the electrical contact between the common point

of an electrical or electronic system and the earth.

A good earth ground is necessary to prevent electrical

shock, eliminate problems from RFI and DC noise.

With more electronic devices being used today, it is

also important to reduce RFI and EMI. Although you

may not see interference in your shack, without a

grounding system, your neighbors may experience in-

terference. Even though many of these devices,

where they must accept interference from their sur-

rounding environment, it is best to eliminate as much

of the possible interference from your shack.

If you do not have a grounding system for your shack,

depending on the location of your shack, basement or

ground ﬂoor, a good ground system can be as simple

as a couple of ground rods driven 2 to 2.5 meter into

the soil. When installing your IC-7400 to your ground-

ing system, the shortest most direct connection is rec-

ommended.

NOTE: There are many publications covering

proper grounding techniques. Check with your local

dealer for more information and recommendations.

R WARNING!: NEVER ground station equip-

ment or antennas to house gas lines. NEVER at-

tach ground lines to plastic (pvc) pipe.

D Some Symptoms if inadequate grounding

a. Poor DC Ground

50/60 Hz hum on the audio either Rx or Tx without

the antenna connected.

If you feel a tingling sensation when you touch a

metal surface. Surfaces such as the cover of your

radio or power supply.

b. Poor RF Ground

While transmitting and you feel a tingling sensation

when you touch a metal surface. Surfaces such as

the cover of your radio or power supply.

While transmitting, you experience interference to

other electronic devices, such as the telephone,

television or stereo audio systems.

2. Installing your DC Power Supply

The DC power supply is a device used to convert

110/220 V AC, also know as Household current, to a

steady source of 13.8 V DC.

• If you are not using the PS-125:

Connect the supplied DC power cable to the appro-

priate color coded terminals, then insert the DC con-

nector into the DC jack located on the rear of the

radio. (The diagram below describes the connection with

OPC-639. OPC-025D has no ﬁlter box and GND cable.)

The perfect match to your IC-7400 is the PS-125. This

compact switching power supply is the matching

power supply for your IC-7400 with a current rating of

25 A continuous duty. This plug and play unit plugs

into the DC jack located on the rear of the radio.

outlet

A DC power

supply*

to DC power

socket

Transceiver

PS-125

DC power

socket

Transceiver

Red

Black

AC cable

30 A fuses

Supplied

DC power cable

*13.8 V; at least 23 A

continuous

DC power cable

Connect to an AC outlet using the supplied AC cable.

NOTE: Although the power supply current require-

ment is quite low during receiving, this not the case

when you transmit. With many electrical devices in

the shack, it is very important to verify the electrical

circuit is not overloaded.

QUICK REFERENCE GUIDE

3. Installing lightning protection

Although you may not live in an area with high occur-

rence for lightning storms, it is always wise to take

precautions for lightning or static discharges. Proper

lightning protection not only offers protection to the

ham gear, but the shack and most importantly the op-

erator.

NOTE: There are many publications covering

proper lightning protection, check with your local

dealer for more information and recommendations.

4. Installing your antenna system

Whether your IC-7400 is your first radio or one of

many, one of your key elements in a great shack is

the antenna system. There are three connections on

the back of your IC-7400, two for HF and 6 m and one

for 2 m. If you are using one antenna for HF and 6 m,

for simplicity, connect the antenna coax to ANT 1.

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 tran-

sistors. In this case, an antenna tuner is useful to

match the transceiver and antenna. Low SWR al-

lows full power for transmitting even when using the

antenna tuner. The IC-7400 has an SWR meter to

monitor the antenna SWR continuously.

ANTENNA 1, 2

[Example]: ANT1 for 1.8–18 MHz bands

ANT2 for 21–50 MHz bands

PL-259 CONNECTOR INSTALLATION EXAMPLE

30 mm

Slide the coupling ring

down. Strip the cable

jacket and soft solder.

Coupling ring

10 mm (soft solder)

1 0 m m

Soft

solder

Strip the cable as

shown at left. Soft sol-

der the center con-

ductor.

1–2 mm

solder solder

Slide the connector

body on and solder it.

144 MHz ANTENNA

Connect a VHF (60–144 MHz)

antenna; impedance: 50

Screw the coupling

ring

Ω

onto

the

connector body.

30 mm ≈

9 ⁄ 8 in 10 mm ≈

3 ⁄ 8 in 1–2 mm ≈

1 ⁄ 16 in

Your IC-7400 is equipped with an internal antenna

tuner (ATU) for operation on 160–6 m. This ATU is de-

signed to work with an unbalanced 50

R WARNING: Although a mag mount antenna

works great on a vehicle, DO NOT use the IC-7400

with this type of antenna.

feedline. The

purpose of the internal antenna tuner is to match the

impedance of your antenna system to as close to a

Ω

CAUTION: Although your IC-7400 has protection

to drop down power with a high SWR, this does not

completely protect the transceiver from transmis-

sion without an antenna. Make sure you have an

antenna connected whenever you transmit with

your radio.

load as possible. This ATU will not operate with

a long wire or ladder line (450

or other balanced

feedlines). An external ATU such as the AH-4 would

be necessary for this kind of operation.

Ω

NOTE: There are many publications covering

proper antennas and their installation, check with

your local dealer for more information and recom-

mendations.

Ω

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