Unication NP88 POCSAG manuali

Unication NP88 POCSAG Manuale di Servizio (65 pagine)

Marchio: Unication | Categoria: Decoder | Dimensione: 0.63 MB |

Inglese

Indice

SERVICE MANUAL

1

Foreword

2

Computer Software Copyrights

3

About This Publication

6

Revisions

7

Related Publications

7

Product Overview

9

A ddres s ing

10

Controls and Indic ator

10

Liquid Crystal Display (LCD)

11

7:44a 11-11

12

2: 11:45a

12

Standard Features

13

Message Features

14

Duplicate Message Indicator

14

VIBRA-Page

14

Operation

14

Battery Check And Monitor

16

Reminder Alert

16

Standard Options

17

Time and Date Options

17

Alert Options

18

− 60-second lockout

19

− 150-second lockout

19

− 390-second lockout

19

FLEX-Specific Options

20

Automatic Message Formatting

21

Automatic Reset

21

Erroneous Data Indication

21

Out of Range Option

21

Theory of Operation

22

General Circuit Description

23

Receiver

24

Paging Coding Schemes

25

Figure 1-9

27

Removing the Back Cover

28

Replacing the Back Cover

29

Figure 1-13

30

Figure 1-14

30

Removing the Receiver Board

31

Replacing the Receiver B oard

31

F igure 1-16

32

F igure 1-17

32

Troubleshooting

33

Corrective Maintenance

34

Self-Diagnostic Feature

34

June 21, 2004 1-31

36

NP88 FLEX GENERAL

36

Paging Sensitivity Check

37

Circuit Checks

39

ΔI is between 2% and 15%

40

Backend Filter Measurement

43

Contents

46

Model Numbers

47

Operating Modes

48

Page Alert/Display Mode

49

Circuit Description

50

Alert Circuitry

51

FLEX Pagers

53

No Audible Alert

55

No Vibrator Alert

56

No Backlighting

57

NOTE: THIS PAGER DOES NOT

58

REQUIRE DATA INVERSION, BUT

58

CAN BE CONFIGURED FOR

58

INVERSION DUE TO TERMINAL

58

REQUIREMENTS

58

June 21, 2004 3-i

60

NP88 FLEX RECEIVER

61

Specifications

61

June 21, 2004 3-1

61

RECEIVER NP88 FLEX

62

3-2 June 21, 2004

62

NP88 FLEX RECEIVER

63

June 21, 2004 3-3

63

3-4 June 21, 2004

64

Oscillator Frequencies

65

June 21, 2004 3-5

65

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