User's Guide

DANIELS
ELECTRONICS LTD
TM
CI-PM-3 Paging Modulator Instruction Manual iii
TABLE OF CONTENTS
Page
1 GENERAL............................................................................................................................ 1-1
1.1 Introduction .......................................................................................................... 1-1
1.2 Construction ......................................................................................................... 1-2
1.3 Printed Circuit Board Numbering Convention...................................................... 1-2
1.4 Specifications........................................................................................................ 1-2
1.4.1 General Specifications .................................................................................... 1-2
1.4.2 CTCSS Decoder/Encoder (Option) ................................................................ 1-4
1.4.3 Physical Specifications ................................................................................... 1-5
2 THEORY OF OPERATION................................................................................................. 2-1
2.1 Paging Signal Path................................................................................................ 2-1
2.1.1 2-Level Digital Paging .................................................................................... 2-1
2.1.1.1 Self Test Circuitry..................................................................................... 2-2
2.1.2 4-Level Digital Paging .................................................................................... 2-2
2.1.3 Analog Paging ................................................................................................ 2-3
2.1.4 Front Panel Indicator Circuitry ....................................................................... 2-4
2.1.4.1 Data Indicator Circuitry ............................................................................ 2-4
2.1.4.2 Analog / Digital Indicator Circuitry........................................................... 2-4
2.1.4.3 LED Power............................................................................................... 2-4
2.2 OCXO/PLL .......................................................................................................... 2-5
2.2.1 Standard Frequency Reference ....................................................................... 2-5
2.2.2 High Stability Frequency Reference ............................................................... 2-5
2.3 Configuration Options.......................................................................................... 2-6
2.3.1 Simultaneous Broadcasting (2 Level Paging Only)......................................... 2-6
3 ALIGNMENT PROCEDURE AND INSTALLATION ...................................................... 3-1
3.1 General ................................................................................................................. 3-1
3.2 Repair Notes......................................................................................................... 3-1
3.3 Recommended Equipment List ............................................................................. 3-1
3.4 Installation ............................................................................................................ 3-2
3.5 Alignment ............................................................................................................. 3-2
3.6 Frequency (Digital Paging) Adjustment................................................................ 3-2
3.7 Reference (Analog Paging) Adjustment................................................................ 3-3
3.8 Test Data Symmetry Adjustment .......................................................................... 3-3
3.9 2 And 4 Level Deviation Adjustment..................................................................... 3-3
3.10 PLL Setup............................................................................................................. 3-4
3.11 Data Delay Setup.................................................................................................. 3-5
3.12 Simulcast Delay Setup.......................................................................................... 3-6