AT&T 2820 Instruction Manual Page 5

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iv
TABLE OF CONTENTS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
FOREWORD .................................................................................... i
IMPORTANT .................................................................................... i
EXPLICIT DEFINITIONS .................................................................. i
PRECAUTIONS ............................................................................... ii
SUPPLIED ACCESSORIES ........................................................... iii
TABLE OF CONTENTS .................................................................. iv
QUICK REFERENCE GUIDE .................................................. I–XIV
Installation ................................................................................ I
Your rst contact ..................................................................... X
Repeater operation ............................................................... XII
Programming memory channels........................................... XIII
1PANEL DESCRIPTION ........................................................ 1–14
Front panel— controller .......................................................... 1
Function display ...................................................................... 3
Function guide indications ...................................................... 7
Main unit ................................................................................. 9
Microphone (HM-133) ........................................................... 11
Microphone keypad ............................................................... 12
Optional microphones (HM-154)............................................ 14
2 SETTING A FREQUENCY ................................................. 15–19
Preparation ........................................................................... 15
Using the tuning dial ............................................................. 17
Using the [Y]/[Z] keys .......................................................... 17
Using the keypad .................................................................. 17
Tuning step selection ............................................................ 18
Lock functions ....................................................................... 19
3 BASIC OPERATION .......................................................... 20–28
Receiving .............................................................................. 20
Transmitting .......................................................................... 20
Selecting output power ......................................................... 21
Operating mode selection ..................................................... 21
Squelch attenuator ................................................................ 22
V/V, U/U simultaneous receive (Para-watch) ........................ 23
Sub-band mute/busy beep .................................................... 24
Monitor function .................................................................... 24
Single band operation ........................................................... 25
One-touch PTT function ........................................................ 26
Audio mute function .............................................................. 27
Band scope ........................................................................... 27
4 REPEATER OPERATION .................................................. 29–34
General ................................................................................. 29
Accessing a repeater ............................................................ 30
Subaudible tones .................................................................. 32
Offset frequency .................................................................... 34
5 DV MODE OPERATION (Optional UT-123 is required) ..... 35–59
Digital mode operation .......................................................... 35
Call sign programming .......................................................... 35
Digital voice mode operation ................................................. 38
DV automatic detect ............................................................. 40
About D-STAR system .......................................................... 41
Digital repeater operation ...................................................... 42
Received call sign ................................................................. 47
Copying the call sign ............................................................. 49
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