iii
FOREWORD …………………………………………………………… i
EXPLICIT DEFINITIONS ……………………………………………… i
FEATURES ……………………………………………………………… i
IMPORTANT …………………………………………………………… i
PRECAUTIONS ……………………………………………………… ii
TABLE OF CONTENTS ……………………………………………… iii
SUPPLIED ACCESSORIES ………………………………………… v
1ACCESSORY ATTACHMENT ………………………………… 1
■Antenna ………………………………………………………… 1
■Belt clip ………………………………………………………… 1
■Handstrap ……………………………………………………… 1
■Battery pack …………………………………………………… 1
2PANEL DESCRIPTION ……………………………………… 2–7
■Front, top and side panels …………………………………… 2
■Function display ……………………………………………… 6
3BATTERY CHARGING ……………………………………… 8–13
■Caution ………………………………………………………… 8
■Regular charging ……………………………………………… 10
■Rapid charging ……………………………………………… 11
■Optional battery case ………………………………………… 12
■Battery information …………………………………………… 12
■External DC power operation ……………………………… 13
4FREQUENCY AND CHANNEL SETTING ……………… 14–19
■Main band selection ………………………………………… 14
■Mode selection ……………………………………………… 15
■Operating band selection …………………………………… 16
■Setting a tuning step ………………………………………… 18
■Setting a frequency …………………………………………… 18
5BASIC OPERATION ……………………………………… 20–28
■Receiving ……………………………………………………… 20
■Setting audio volume ………………………………………… 20
■Setting squelch level ………………………………………… 21
■Operating mode selection …………………………………… 21
■Monitor function ……………………………………………… 22
■Attenuator function …………………………………………… 22
■Band scope …………………………………………………… 23
■Transmitting …………………………………………………… 24
■Transmit power selection …………………………………… 24
■Lock function ………………………………………………… 25
■Dualwatch operation ………………………………………… 25
■TV channel operation ………………………………………… 28
6REPEATER AND DUPLEX OPERATIONS ……………… 29–33
■Repeater operation …………………………………………… 29
■Duplex operation ……………………………………………… 31
■Auto repeater function ……………………………………… 32
■1750 Hz tone ………………………………………………… 33
7DV MODE OPERATION
(Optional UT-121 is required for IC-91A) ………………… 34–63
■Digital mode operation ……………………………………… 34
■Call sign programming ……………………………………… 34
■Digital voice mode operation ………………………………… 38
■About D-STAR system ……………………………………… 40
■Digital repeater operation …………………………………… 41
■Received call sign …………………………………………… 46
■Copying the call sign ………………………………………… 48
■Break-in communication …………………………………… 51
■Message operation …………………………………………… 52
■Automatic reply function ……………………………………… 54
TABLE OF CONTENTS
