iii
FOREWORD …………………………………………………………… i
EXPLICIT DEFINITIONS ……………………………………………… i
FEATURES ……………………………………………………………… i
IMPORTANT …………………………………………………………… i
PRECAUTIONS ……………………………………………………… ii
TABLE OF CONTENTS ……………………………………………… iii
SUPPLIED ACCESSORIES ………………………………………… v
1 ACCESSORY ATTACHMENT ………………………………… 1
■ Antenna ………………………………………………………… 1
■ Belt clip ………………………………………………………… 1
■ Handstrap ……………………………………………………… 1
■ Battery pack …………………………………………………… 1
2 PANEL DESCRIPTION ……………………………………… 2–7
■ Front, top and side panels …………………………………… 2
■ Function display ……………………………………………… 6
3 BATTERY CHARGING ……………………………………… 8–13
■ Caution ………………………………………………………… 8
■ Regular charging ……………………………………………… 10
■ Rapid charging ……………………………………………… 11
■ Optional battery case ………………………………………… 12
■ Battery information …………………………………………… 12
■ External DC power operation ……………………………… 13
4 FREQUENCY 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
5 BASIC 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
6 REPEATER AND DUPLEX OPERATIONS ……………… 29–33
■ Repeater operation …………………………………………… 29
■ Duplex operation ……………………………………………… 31
■ Auto repeater function ……………………………………… 32
■ 1750 Hz tone ………………………………………………… 33
7 DV 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
