Codan Radio Communications UT-3H930-SW User Manual

CI-PM-3 Paging Modulator Instruction Manual

iii

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