TABLE OF CONTENTS

FOREWORD ……………………………… i

IMPORTANT ……………………………… i

EXPLICIT DEFINITIONS ………………… i

IN CASE OF EMERGENCY …………… ii

NOTE ……………………………………… ii

RADIO OPERATOR WARNING………… iii

TABLE OF CONTENTS ………………… iv

PRECAUTION …………………………… v

1OPERATING RULES ………………… 1

2PANEL DESCRIPTION …………… 2–5

Front panel ………………………… 2

Function display …………………… 4

Microphone ………………………… 5

3BASIC OPERATION …………… 6–10

Channel selection ………………… 6

Receiving and transmitting ……… 8

Call channel programming………… 9

Channel comments ……………… 10

Microphone lock function ………… 10

Display backlighting ……………… 10

4DUALWATCH/TRI-WATCH ………… 11

Description ………………………… 11

Operation ………………………… 11

5SCAN OPERATION …………… 12–13

Scan types ………………………… 12

Setting tag channels ……………… 13

Starting a scan …………………… 13

6 DSC OPERATION ……………… 14–28

MMSI code programming ……… 14

MMSI code check ………………… 14

DSC individual ID ………………… 15

Position indication ………………… 16

Distress call ……………………… 17

Transmitting DSC calls…………… 18

Receiving DSC calls ……………… 25

7INTERCOM OPERATION

(IC-M402A Only) ……………………… 29

Intercom operation ……………… 29

8SET MODE ……………………… 30–32

SET mode programming ………… 30

SET mode items ………………… 31

9CONNECTIONS AND MAINTENANCE ………………… 33–36

Supplied accessories …………… 33

Antenna …………………………… 33

Fuse replacement ………………… 33

Cleaning …………………………… 33

Connections ……………………… 34

Mounting the transceiver ………… 35

Optional MB-92 attachment …… 35

Optional MB-69 installation ……… 36

10 TROUBLESHOOTING……………… 37

11COMMANDMIC® HM-127

(IC-M402A only) ………………… 38–51

Panel description …………………38

Function display ……………………40

Channel selection …………………42

Receiving and transmitting ………43

Call channel programming ………44

Lock functions………………………44

Display backlighting ………………45

Monitor function ……………………45

Dualwatch/Tri-watch operation …45

Setting tag channels ………………46

Starting a scan ……………………46

Set mode programming …………47

Intercom operation…………………48

Channel comments ………………48

HM-127 supplied accessories ……49

Installation …………………………50

12CHANNEL LIST …………………… 52

13SPECIFICATIONS …………… 53–54

Specifications …………………… 53

Dimensions ……………………… 54

14TEMPLATE ………………………… 55

15OPTIONS …………………………… 57

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Icom IM402SA, IM402A instruction manual Table of Contents

IM402A, IM402SA specifications

The Icom IM402SA and IM402A are robust mobile transceivers designed for various communication needs, particularly in the marine and recreational sectors. These models are known for their reliability, durability, and advanced features that cater to both casual users and professionals.

One of the standout characteristics of the IM402SA and IM402A is their compact design, making them suitable for a range of vehicles, from boats to vehicles employed in rugged environments. Their sturdy build ensures they can withstand harsh conditions, which is critical for marine use where humidity and saline air can affect equipment longevity.

In terms of features, both models are equipped with a high-performance receiver that offers exceptional clarity and range, ensuring that communication remains clear over long distances. The IM402 series supports multiple frequency bands, enabling users to communicate effectively across various channels. This versatility is crucial in dynamic environments where multiple communication methods may be needed.

Another significant aspect of the Icom IM402SA and IM402A is their advanced digital signal processing (DSP) technology. This feature enhances audio quality by reducing background noise and improving overall clarity, facilitating better communication in noisy environments, such as when on the water or in busy industry settings. The built-in noise-cancellation technology ensures that conversations remain intelligible even when external noises are present.

User-friendly interfaces are a hallmark of Icom products, and the IM402 series is no exception. The intuitive keypad layout and illuminated display make it easy to navigate through settings and channels, even in low-light conditions. Furthermore, programmable function keys allow users to customize their experience, providing quick access to frequently used features.

The transceivers also come with emergency functions, including distress calling capabilities that comply with maritime regulations. This feature is vital for safety, especially for those venturing into remote or potentially hazardous areas. Additional safety features can include weather alerts and access to emergency channels.

In summary, the Icom IM402SA and IM402A mobile transceivers are designed to deliver high-quality, reliable communication with a host of advanced features. Their robust design, superior audio clarity, and user-friendly interfaces make them a practical choice for anyone needing dependable communication in challenging environments. Whether on the water or in the field, the IM402 series stands out as a reliable tool for effective communication.