xii 
 
Contents 
 
Preface ............................................................................  i 
Before operation  .............................................................  ii 
Handling precaution  .......................................................  iii 
DISTRESS CALL  .............................................................  vi 
Equipment exterior  .........................................................  ix 
Glossary of terms  ...........................................................  xvi 
1 EQUIPMENT OVERVIEW ........................................... 1-1 
1.1 Functions .....................................................................................................................  1-1 
1.2 Features ......................................................................................................................  1-1 
1.3 Basic configuration ......................................................................................................   1-2 
1.3.1 Basic configuration of the main unit ....................................................................  1-2 
1.3.2 Options ................................................................................................................   1-2 
1.3.3 System configuration  ...........................................................................................  1-3 
1.4 External dimensions ....................................................................................................   1-4 
1.5 Block diagram .............................................................................................................. 1-12 
2 NAMES AND FUNCTIONS ......................................... 2-1 
2.1 Controller (NCM-1770) ................................................................................................   2-1 
2.2 Main displays ...............................................................................................................  2-3 
2.2.1 Status display ......................................................................................................   2-3 
2.2.2 Menu screen ........................................................................................................   2-4 
2.2.3  DSC message receiving screen ..........................................................................   2-5 
3 INSTALLATION ........................................................... 3-1 
4 OPERATION ................................................................ 4-1 
4.1 Controller operation overview ......................................................................................   4-1 
4.2 Basic communication procedure .................................................................................   4-3 
4.2.1 Turning ON the power  .........................................................................................  4-3 
4.2.2 Turning OFF the power  .......................................................................................  4-4 
4.2.3  Communicating with the radiotelephone .............................................................   4-5 
4.2.4 Receiving with scanning  ......................................................................................  4-7 
4.2.5 Receiving with dual watch ...................................................................................   4-8 
4.2.6 Using memory channels  ......................................................................................  4-9 
4.2.7  Communicating on a private channel ..................................................................   4-11 
4.2.8 Receiving a weather channel  ..............................................................................   4-11 
4.2.9  Changing the channel region  ..............................................................................  4-12