Uniden UM423 AM Manuals

Table of Contents

• • 2

    Table of Contents

• 3

  Introduction

  • 3

    Features
  • 3

    Manual Overview

• 4

  Getting Started

  • 4

    What's Included
  • 5

    Parts of the Radio

• 8

  Operation

  • 8

    Turning On the Power
  • 8

    Setting the Manual Squelch
  • 9

    Selecting a Channel
  • 10

    Transmitting
  • 10

    Call Function
  • 10

    Channel 88
  • 10

    Dual Watch
  • 11

    Scanning
  • 12

    Open Scan (OS) Mode
  • 12

    Group Scan (GS) Mode
  • 13

    Priority Channel
  • 13

    Add/Remove Channels From SCAN Memory
  • 14

    Busy Channel Lockout
  • 14

    Back Light
  • 15

    Roger Beep
  • 16

    Beep On/Off
  • 16

    Selecting the Call Tone
  • 17

    ANL (Automatic Noise Limiter)
  • 17

    NB (Noise Blanker)
  • 18

    Using the PA Feature
  • 18

    Using the Siren Feature

• 19

  Installing the Hardware

  • 19

    Mounting the Radio
  • 21

    Connecting the Radio
  • 23

    Connecting Accessories
  • 24

    Connecting to an External Speaker
  • 25

    Connecting to an External PA Speaker

• 26

  Maintenance and Toubleshooting

  • 26

    Common Questions
  • 26

    Engine Noise Suppression

• 27

  Specifications

• 28

  Australia AM Marine Channels & Frequencies

• 29

  Antenna Selection and Installation

• 29

  Regulations and Safety Warnings

  • 29

    Basic Radio Guidelines

• 30

  Year Limited Warranty

• 31

  Mounting Bracket Template