Tait TB7100 User Manual

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TB7100 bas e station

Installation and

Operation Ma nu a l

MBB-00001-02

Issue 2

December 2005

Tait Contact Information

Tait Radio Communications Corporate Head Office

Tait Electronics Ltd P.O. Box 1645 Christchurch New Zeala n d

For the address and telephone number of regiona l of f ices, refer to th e TaitWorld website:

Website: http://www.taitworld.com

Technical Support

For assistance with specific technical issues, contact Technical Support:

E-mail: support@taitworld.com Website: http://support.taitworld.com

To our European customers:

Tait Electronics Limited is an environmentally responsible company which supports waste minimi zation and ma terial reco very. The European Union ’s Waste Electrical and Electronic Equipment Directive requires that this product be disposed of separately from the general waste stream when its service life is over. Please be enviro nmentally responsible and dispose through the original supplier, your local municipal waste “separate collection” service, or contact Tait Electronics Limited.

2 TB7100 Installation and Operation Manual

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Enquiries and Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Updates of Manual and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Copyright . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Associated Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Publication Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.1 Frequency Bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.2 RF Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.3 Power Supply Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.4 Mechanical Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.5 Product Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2 Mechanical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.1 Tray. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.2 UI Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.3 Receiver Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.4 Transmitter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.5 SI Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.6 AC Power Supply Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.1 Receiver Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.1 RF Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.2 Digital Baseband Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.1.3 Audio Processing and Signalling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.2 Transmitter Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.2.1 Audio Processing and Signalling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.2.2 Frequency Synthesizer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.2.3 RF Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3.3 User Interface Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3.4 System Interface Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3.4.1 Internal Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.4.2 Serial Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.4.3 General Purpose IO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.4.4 Receiver Audio Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.4.5 Tone On Idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.4.6 Transmitter Audio Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

TB7100 Installation and Operation Manual 3 © Tait Electronics Limited May 2005

3.4.7 Opto Isolated Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.4.8 Relay Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.4.9 Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.4.10 RSSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.4.11 Receiver Gate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.4.12 Receiver Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.5 Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.1 Personal Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.1.1 Lethal Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.1.2 Explosive Environments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.1.3 Proximity to RF Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.1.4 High Temperatures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.2 Equipment Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.2.1 ESD Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.2.2 Antenna Load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.2.3 Equipment Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.2.4 Installation and Servicing Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.3 Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.3.1 Distress Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.3.2 FCC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.3.3 Unauthorised Modifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.3.4 Health, Safety and Electromagnetic Compatibility in Europe. . . . . . . . 44

4.4 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.4.1 Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.4.2 Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.4.3 Dust and Dirt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.5 Grounding and Lightning Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.5.1 Electrical Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.5.2 Lightning Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.6 Recommended Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.7 Ventilation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.7.1 Cabinet and Rack Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.8 Installing the Base Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.8.1 Unpacking the Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.8.2 Identifying the Mechanical Configuration . . . . . . . . . . . . . . . . . . . . . 49

4.8.3 Power Supply Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.8.4 Setting the AC Mains Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.8.5 Mounting the Base Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4.8.6 Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.8.7 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

5 Replacing Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.1 Removing the Base Station and Opening the Tray. . . . . . . . . . . . . . . . . . . . . . . 54

5.2 Replacing the UI Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

5.3 Replacing the Receiver Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

5.4 Replacing the Transmitter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

4 TB7100 Installation and Operation Manual

5.5 Replacing the SI Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

5.6 Replacing the Transmitter and Receiver Fans . . . . . . . . . . . . . . . . . . . . . . . . . . 59

5.7 Replacing the Fan Power Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

5.8 Replacing the Temperature Sensor Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

5.9 Replacing the AC Power Supply Unit, Fan and Filter Module . . . . . . . . . . . . . .61

5.10 Replacing the Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

5.11 Final Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

6 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

6.1 External Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

6.2 Internal Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

6.2.1 Transmitter and Receiver Connectors . . . . . . . . . . . . . . . . . . . . . . . . 71

6.2.2 SI Board Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6.2.3 UI Board Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

7 Preparation for Operat ion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

7.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

7.2 Mode of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

7.3 Line-controlled Base. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

7.3.1 Test Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

7.3.2 Test Equipment Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

7.3.3 Link Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

7.3.4 Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

7.3.5 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

7.3.6 Receiver Audio Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

7.3.7 Receiver Functional Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

7.3.8 Transmitter Audio Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 85

7.3.9 Transmitter Functional Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

7.4 Talk Through Repeater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

7.4.1 Test Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

7.4.2 Test Equipment Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

7.4.3 Link Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

7.4.4 Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

7.4.5 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

7.4.6 Audio Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

7.4.7 Talk Through Repeater Functional Testing . . . . . . . . . . . . . . . . . . . . 91

7.4.8 Alternate Talk Through Repeater Configuration . . . . . . . . . . . . . . . . 92

7.5 RF Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

7.5.1 Test Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

7.5.2 Test Equipment Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

7.5.3 Link Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

7.5.4 Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

7.5.5 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

7.5.6 Audio Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

7.5.7 Programming for FFSK Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

7.5.8 Programming for THSD Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 98

7.5.9 Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

TB7100 Installation and Operation Manual 5 © Tait Electronics Limited May 2005

7.6 Data Repeater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

7.6.1 Link Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

7.6.2 Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

7.6.3 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

7.6.4 Audio Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

7.6.5 Data Repeater Functional Testing . . . . . . . . . . . . . . . . . . . . . . . . . . 104

7.7 TaitNet Trunking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

7.8 Programmable Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

7.8.1 Connecting to the PC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

7.8.2 TB7100 Programming Application . . . . . . . . . . . . . . . . . . . . . . . . . 105

7.8.3 Mandatory Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

7.8.4 User-defined Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

7.8.5 Recommended Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

7.8.6 Function Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

7.9 Additional Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

7.10 Adding Subaudible Signalling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

7.10.1 Enabling Subaudible Signalling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

7.10.2 Testing Subaudible Signalling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

7.10.3 Multiple Subaudible Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

7.11 Soft Off (Tx Tail Time) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

7.11.1 Link Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

7.12 Tone On Idle (TOI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

7.12.1 Link Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

7.13 Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

7.13.1 Link Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

7.14 Channel ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

7.14.1 Link Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

7.15 Relay Polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

7.15.1 Link Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

7.16 Channel Increment and Decrement by Function Keys . . . . . . . . . . . . . . . . . . . 123

7.17 Carrier Wave Identification (CWID). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

7.17.1 Station ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

7.17.2 Station ID 2/Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

7.17.3 Tone Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

7.17.4 ID Repeat Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

7.17.5 Speed (Words per Minute) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

7.17.6 Wait Period after Loss of COR/COS/CTCSS Input Before IDing. . 124

7.17.7 Transmit Key-Up Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

7.17.8 Transmit Time Out Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

7.17.9 Transmit PTT Drop Out Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

7.17.10Output Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

8 Maintenance Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

Directive 1999/5/EC Declaration of Co nformity . . . . . . . . . . . . . . . . . . . . . . . .141

6 TB7100 Installation and Operation Manual

Preface

Scope of Manual

Welcome to the TB7100 Installation and Operation Manual. This manual provides information on installing and operating the TB7100 base station. Also included in this manual are a high-lev el cir cuit description, a functional description and a maintenance guide.

Enquiries and Comments

If you have any enquiries regarding this manual, or any comments, suggestions and notifications of errors, please contact Technical Support (refer to “Tai t Contact Information” on page 2).

Updates of Manual and Equipment

In the interests of i mpr oving the performance, r eliability or servicing of the equipment, Tait Electronics Limited reserves the right to update the equipment or this manual or bot h without prior notice.

Copyright

All information contained in this manual is the property of Tait Electronics Limited. All rights are reserved. This manual may not, in whole or in part, be copied, photocop ied, repr oduced, tra nslated, stor ed, or reduced to any electronic medium or machine-r eadable form, without prior written permission from Tait Electronics Limited.

Disclaimer

There are no warranties extended or gr a nted by this manual . Tait Electronics Limited accepts no responsibility for damage arising from use of the information contained in the manual or of the equipment and software it describes. It is the responsibility of the user to ensure that use of such information, equipment and softwar e complies with the la ws, rules and regulations of the applicab le jurisdictions.

TB7100 Installation and Operation Manual 7 © Tait Electronics Limited December 2005

Document Conventions

“File > Open” means “click File on the menu bar, then click Open on the list of commands that pops up”. “Channel Setup > Channels > Detailed” means “in the navigation pane find the Channel Setup group, and select Channels from it, on the Cha nnels page select the Detailed tab”.

Within this manual, four types of alerts are given to the reader: Warning, Caution, Important and Note. The follo wing paragraphs illustrate each type of alert and its associated symbol.

Warning!! This alert is used when there is a potential risk

Caution This alert is used when there is a risk of minor or

Important This alert is used to warn about the risk of equipment dam-

of death or serious injury.

moderate injury to people.

age or malfunction.

Note This alert is used to highlight information that is required to

ensure procedures are performed correctly.

Associated Documentation

The following associated documentation is available for this produc t:

■ MBB-00002-xx TB7100 Specifications Manual

■ MBB-00003-xx TB7100 Installation Guide

■ MBB-00005-xx TB7100 Service Manual

■ MBA-00013-xx TBA0STU/TBA0STP Calibration and Test Unit

The characters xx represent the issue number of the documentation. All available documentation is provided on the CD (406-00047-xx)

supplied with the base station. Updates may also be published on the Tait support website.

Technical notes are published from time to time to d escribe applications for Tait products, to provide technical details not included in manuals, and to offer solutions for any problems that arise.

Operation Manual

8 TB7100 Installation and Operation Manual

Publication Record

Issue Publication Date Description

1 May 2005 First release 2 December 2005 Internal AC power supply, A4 and D1 bands

added.

TB7100 Installation and Operation Manual 9 © Tait Electronics Limited December 2005

10 TB7100 Installation and Operation Manual

1Introduction

Figure 1.1 TB7100 base stations

Configuration with pr ovision for int ernal AC p ower supply*

Configuration without provision for internal AC power supply*

*cover removed

The TB7100 is a softw ar e and h ar dw ar e link- configur ed ba se stati on which is designed for operation in a large variety of standard frequency ranges. It makes extensive use of digital and DSP technology. Many operating parameters such as channel spacing, audio bandwidth and sig na lling are controlled by software.

This manual includes the information required for installing and operating the base station.

This section describes the different options available for:

■ frequency bands

■ RF output power

■ power supply

■ mechanical configurations

■ product codes

For specifications, refer to the specifications manual or the area on the Tait World website reserved for TB7100 products.

TB7100 Installation and Operation Manual Introduction 11 © Tait Electronics Limited December 2005

1.1 Frequency Bands

The base station is available in the following frequency bands:

■ 66 to 88MHz (A4)

■ 136 to 174MHz (B1)

■ 216 to 266 MHz (D1)

■ 400 to 470MHz (H5)

■ 450 to 530MHz (H6)

■ 450 to 520MHz (H7)

The RF band of the base station is implemented by the frequency band of the transmitter and receiver modules.

1.2 RF Output Power

The base station is available with 25W and 50W/40W RF output power. The RF output pow er options ar e implemented by d ifferent transmitter and receiver modules.

The 25W base station is available in the following frequency bands:

■ A4

■ B1

■ D1

■ H5

■ H6

The 50W/40W base station is available in the following frequency bands:

■ B1 (50 W)

■ H5 (40W)

■ H7 (40W)

12 Introduction TB7100 Installation and Operation Manual

1.3 Power Supply Options

The base station is available with or without an internal AC power supply. All base stations have an external DC input power connector which is used

as main power supply when no internal AC power supply is fitted. When the internal AC power supply is fitted, the DC input can be used as

a DC backup pow er option. In case of AC mains failure the base station will automatically and seamlessly switch to DC power input.

If no internal AC power supply is fitted, an external Tait T809-10-87xx power supply can be used to supply the DC voltage required.

Warning!! The internal AC power supply unit contains

voltag es that ma y be lethal. Refer to the ratings label on the rear of the bas e station. The internal AC power supply contains no user-servicable parts.

Important Wrong mains v oltage! Befor e connecting to the A C po w er

connector, ensure that the internal 115V/230V voltage mains selector switch is set to the correct mains voltage.

1.4 Mechanical Configurations

The base station is available in two different mechanical configurations— with or without provision for an internal AC power supply unit.

The mechanical configuration with provision for an internal AC power supply has the following distinguishing features:

■ larger air intake on the right-hand side of the front panel

■ pro vis ion for A C con nector on the left-hand side o f the r ear p anel (r efer

to Figure 1.1 on page 11)

■ ground point on the right-hand side of the rear panel rather than on the

left-hand side

■ different SI board and internal cables.

The mechanical configuration without provis ion f or an internal AC power supply unit cannot be upgraded with an internal AC power supply unit.

The product codes of the base station (see belo w) do not distinguish between the mechanical configurations.

TB7100 Installation and Operation Manual Introduction 13 © Tait Electronics Limited December 2005

1.5 Product Codes

This section describes the product codes used to identify products of the TB7100 base station product line.

The product codes of the TB7100 base station product line has the format:

TBBaabb-cde-ff

where:

■ aa identifies the frequency band of the receiver:

A4=66 to 88MHz, B1=136 to 174MHz, D1=216 to 266 MHz, H5=400 to 470MHz, H6=450 to 530MHz, H7=450 to 520MHz

■ bb identifies the frequency band of the transmitter:

A4=66 to 88MHz, B1=136 to 174MHz, D1=216 to 266 MHz, H5=400 to 470MHz, H6=450 to 530MHz, H7=450 to 520MHz

■ c identifies the RF output power and digital architecture:

A=25W, level-1 digital architecture B=35W to 50W, level-1 digital architecture C=25W, level-2 digital architecture D=35W to 50W, level-2 digital architecture E=25W, level-3 digital architecture F=35W to 50W, level-3 digital architecture

■ d identifies the power supply option:

0=DC only 1=internal AC power supply unit, factory preset to 115VAC 2=internal AC power supply unit, factory preset to 230VAC

■ e identifies the AC power cable:

1 = Australia/New Zealand 2 = United Kingdom 3 = Europe 4 = USA

■ ff identifies base station options:

00=no options

14 Introduction TB7100 Installation and Operation Manual

2 Mechanical Description

Overview The base station consists of the follo wing main modules:

■ tray b

■ UI board (user interface) d

■ receiver module h

■ transmitter module i

■ SI board (system interface) 1)

■ internal AC power supply unit 1@ (if fitted).

Figure 2.1 P arts of the base station (configuration with internal AC power supply unit shown)

All modules and boards are mounted from above into the 1U tray The modules are secured by scr ews or clips into s tandoffs on the tray chassis, and are easily removed for replacement.

The base station includes two cooling fans the receiver and transmitter modules, a speaker panel, a fan power board sensor board

If the internal AC po wer su pply unit additional fan

The modules and components are interconnected by looms and cables.

TB7100 Installation and Operation Manual Mechanical Description 15 © Tait Electronics Limited December 2005

j mounted on the heatsink of the transmitter module i.

1# and an AC filter module 1!.

g mounted on the fan duct, and a temperature

f and a fan duct e in front of

c mounted behind the fr ont

1@ is fitted, the base station includes an

2.1 Tray

The 1U tray consists of a mild steel folded chassis and a flat cover (not shown) which is fastened to the chassis with 15 Torx T10 screws. The tray can be fitted into a standard 19 inch rack or cabinet using the two rack mounting brackets.

The front panel ha s holes to accommodate the controls and the microphone/programming connector of the UI board. The rear panel has holes to accommodate the connectors and the fuse holder of the SI board, the antenna connectors, and a gr ound terminal.

For more information on the connections, refer to “Connections” on

page 65.

2.2 UI Board

The UI board is mounted behind the front panel with three Torx T10 screws transmitter and receiver modules via the two Micro-MaTch connectors and the two UI cables (not shown). The UI board also has a speaker connector

c and two spring clips D. The UI board is connected to the

Figure 2.2 UI board

Cables not shown.

A volume knob is fitted to the shaft of the volume-control potentiometer.

16 Mechanical Description TB7100 Installation and Operation Manual

2.3 Receiver Module

The receiver module is mounted in the front left of the tra y with five Torx T10 screws

The receiver module is a printed circuit board in SMT design with components on the top and bottom sides. A digital board is reflo w-sol dered to the receiver. Most components are shielded by metal cans.

There are different boards for each frequency band and each RF output power configuration.

The RF located on the bottom side of the boar d. The internal options connector and a factory connector (not shown) for factory use are located on the top side of the board.

For compliance reasons, there are different variants of the receiver module for use in the 25W and 50W/40W base stations. The 25W version has a white DC power connector power connector.

For more information on the connectors, refer to “Connections” on

page 65.

Figure 2.3 Receiver module

b, D C po w er c, auxiliary d, and user interface f connectors are

C and the 50W/40W version has a black DC

TB7100 Installation and Operation Manual Mechanical Description 17 © Tait Electronics Limited December 2005

2.4 Transmitter Module

The transmitter module consisting of a transmitter board f mounted o n a purpose-designed heatsink four Torx T10 screws (not shown).

The transmitter board is a printed circuit board in SMT design with components on the top and bottom sides. A digital board is r eflo w-soldered to the board. Most components are shielded by metal cans. There are different boards for each frequency band and each RF output power configuration.

1) is mounted in the left rear of the tray with

The RF located on the bottom side of the boar d. The internal options connector and a factory connector (not shown) for factory use are located on the top side of the board.

The 50W/40W version has a bla ck DC power connector version has a white DC power connector. For more information on the connectors, refer to “Connections” on page 65.

The board

b, DC po w er c, auxiliary d, and user interface f connectors are

C and the 2 5W

f is mounted to the heatsink 1) with seven Torx T10 screws

f and g.

An L-shaped gap pad pad

j are fitted between the board f and the heatsink 1) to improve h eat

transfer.

Figure 2.4 Transmitter module

i and (with the 50W/40W version) a r ectangular gap

18 Mechanical Description TB7100 Installation and Operation Manual

2.5 SI Board

The SI board is mounted in the rear right of the tray with two Torx T10 screws

The SI board has the follo wing external connectors:

■ 13.8 V DC power connector (labelled 12V DC) b

■ system connector (labelled SYSTEM) c

■ serial data connector (labelled IOIOI) D.

The SI board has the following internal connectors:

■ two syst em interface connectors e (to transmitter and receiver)

■ one DC input connector h, if fitted (from internal AC power supply)

■ one DC output connector i (to transmitter and receiver)

■ fan control connector f (to fan power board on fan duct)

■ temperature control connecto r g (to temperature sensor on transmitter

1), one Pozidriv scr ew j, an d two spring cli ps 1!.

heatsink).

Figure 2.5 SI board

For more information on the connectors, refer to “Connections” on

page 65.

c d

1!1! ef

TB7100 Installation and Operation Manual Mechanical Description 19 © Tait Electronics Limited December 2005

2.6 AC Power Supply Unit

The base station ma y be fitt ed with an int ernal AC po w er supply unit f, an AC filter module

The AC filter module has a stan dard A C connector that fit s into a pr o vision on the rear of the tra y. The AC filter module slides into securing tabs on the tray floor and is held in place by the AC power supply unit.

Note Mechanical configurations without the provision for a standard

AC connector cannot be upgraded with the internal AC power supply unit.

d, and an additional fan g.

The AC power supply unit is held in place by two screws attached to the AC power supply unit by two screws

The AC po w er supply unit is connected to the A C filter module via a cable connector (not shown).

The DC output of the AC power supply unit is connected to the SI board

b. The AC pow er supp ly unit al so has a cable to provide a mains failure

signal to the SI board power circuitry on the SI board to switch to DC external input.

Figure 2.6 AC power supply unit, filter module and fan

c. In case of a mains failure, this signal will cause the

e. The fan is

20 Mechanical Description TB7100 Installation and Operation Manual

e dfe

3 Functional Description

This section describes some principles of the base station operation.

Figure 3.1 shows the high-level block diagram of the base station.

Figure 3.1 Base station high-level block diagram

Ground

Point

Transmitter

Module

Receiver

Module

Fan Power

Board

Tx/Ant

Connector

Temperature

Sensor

Internal power

Transmitter/SI

Internal power

Receiver/SI

Connector

Fuse

DC Input

Connector

System

Connector

SI Board

Mains fail signal

Serial Data

Connector

Internal power

Power Supply

Unit

115V/230V

Selector

Switch

AC Input

Connector

Module

AC Input Filter

FanFan

Internal power

UI/Receiver

UI/Transmitter

Prog/Mic

Connector

UI Board

Speaker

Fan

TB7100 Installation and Operation Manual Functional Description 21 © Tait Electronics Limited December 2005

The block diagram illustrates the main inputs and outputs for power, RF and control signals, as well as the interconnection between modules:

■ pro gram data and audio fr om the PROG/MIC sock et on the UI boar d to and

from the transmitter and recei ver modules

■ audio and signalling from the SYSTEM connector to and from the

transmitter and receiver modules

■ RS-232 data from the serial data connector (IOIOI) to and from the

transmitter and receiver modules

■ fan power and control from the SI board

■ power distribution fr om the AC and DC power in put connecto rs to the

transmitter and receiver modules, and from the recei ver module to the UI board.

The circuitry of the individual modules that make up the base station is described in more detail in the following sections.

Frequency Bands and Sub-bands

The circuitry of the transmitter and receiver modules is similar for all frequency bands and is therefore covered by a single description in this manual. Where the circuitry differs between bands, separate descriptions are provided for each frequency band. For more information on frequency bands, refer to the specifications man ual.

RS-232 Signals External data communications all occur directly between the connected

computer (or other electrical equipment) and the transmitter and receiver modules over the RS-232 serial lines.

Fan Signals The power and ground signals for the fans are routed from the SI board to

the fans behind the front panel. These signals are electrically isolated from all other system signals to ensur e fan noise is not transferred to other sensitiv e system components.

If there is a fault in the fan circuitry , the transmitter module is protected fr om overheating by its internal foldback circuitry.

Speaker Signal Received audio is sen t from the receiver module to the UI board.

The volume is controlled by the volume potentiometer on the UI board. The audio signal is routed through the UI board to the speaker for monitoring purposes.

Power and Ground The SI board provides power to the transmitter and receiver modules.

The receiver modules provides power to the UI board.

22 Functional Description TB7100 Installation and Operation Manual

3.1 Receiver Operation

Parts of Receiver Board

The main circuit parts of the receiver modules are:

■ receiver

■ frequency synthesizer

■ CODEC (coder-decoder) and audio circuitry

■ power supply

■ interface circuitry

Software plays a prominent role in the functioning of the radio. When describing the operation of the radio the software m ust be included with the above. This is considered further below.

These functional parts are described in detail below.

Figure 3.2 Receiver high-level block diagram

2nd IF: 64 kHz

Second LO UHF: 90.328 MHz VHF: 42.928 MHz

AGC

Digital down-

converter

IF:

UHF: 45.1 MHz

ANT

LPF

Front

end

VHF: 21.4 MHz

1st

Phase

locked to

TCXO

Quad

Demod

VCO

Channel

LPF

Channel

LPF

CUSTOM-

LOGIC

BLOCK

Mag.

Demod

RSSI

Audio

filtering

emphasis

Data and signalling

decoders

Squelch

De-

BLOCK

Optional

processing

DSP

Side

tones

System Interface or User Interface

HARDWARE BLOCK

3.1.1 RF Hardware

Front End Circuitry and First IF

The front-end hardware amplifies and image filters the received RF spectrum, then down-converts the desired channel frequency to a first intermediate frequency IF1 of 45.1MHz (UHF) or 21.4MHz (VHF) where coarse channel filtering is performed. The first LO (local oscillator) signal is obtained from the frequency synthesizer and is injected on the low side of the desired channel frequen cy for all bands except A4. When r eceiving the modulation to the freque ncy synthesizer is muted. The ou tput of the first IF (intermediate frequency) stage is then down-converted using an imagereject mixer to a low IF of 64kH z.

TCXO:

13.000 MHz

PLL

VCXO

Loop

filter

Loop filter

Triple-point

Equalisation

Frequency

control

KEY

Analogue-to-digital conversion

Digital-to-analogue conversion

NOTES

(1) Noise blanker not shown

TB7100 Installation and Operation Manual Functional Description 23 © Tait Electronics Limited December 2005

Quadrature Demodulator

Automatic Gain Control

The LO for the image-reject mixer (quadratur e demodulator) is synthesized and uses the TCXO (temperature-compensated crystal oscillator) as a reference. This ensures good centring of the IF filters and more consistent group-delay performance. The quadrature demodulator device has an internal frequency division of 2 so the second LO operates a t 2 x (IF1 + 64kHz). The quadrature output from this mixer is fed to a pair of ADCs (analog-to-digital con v erters) with high dynamic range where it is oversampled at 256kHz and fed to the custom logic device.

The AGC (automatic gain contr ol) is used to limit the maximum signal lev el applied to the image-reject mixer and ADCs in order to meet the requirements for intermodulation and selectivity performance. Hardware gain control is perfo rmed by a variable-gain amplifier within the quadrature demodulator device driven by a 10-bit DAC (digital-to-analog converter). Information about the signal level is obtained from the IQ (in-phase and quadrature) data out put stream from the ADCs. The control loop is completed within custom logic. The A GC will begin to reduce gain when the combined signal power of the wanted signal and first adjac ent channels is greater than about –70dBm. In the presence of a str ong adjacent-channel signal it is therefore possib le that the AGC may st art acting when the wanted signal is well below –70dBm .

3.1.2 Digital Baseband Processing

Custom Logic The remainder of the receiver processing up to demodulation is performed

by custom logic. The digitised quadrature signal from the RF hardware is digitally down-converted to a zero IF, and channel filtering is performed at base-band. Different filter shapes are possible to accommodate the various channel spacings and data requirements. These filters provide the bulk of adjacent channel selectivity for narrow-band operation. The filters have linear phase response so that good group-delay performance for data is achiev ed. The filters also decimate the sample rate do wn to 48kHz. Custom logic also performs demodulation, which is multiplexed along with A GC and amplitude data, and fed via a s ingle synchronous serial port to the DSP. The stream is demultiplex ed a nd the demodulation data used a s an input for further audio processing.

Noise Squelch The noise squelch process resides in the DSP. The noise content above and

adjacent to the voice band is measured and compared with a preset threshold. When a wanted signal is presen t, out-of-band noise content is reduced and, if below the preset threshold, is indicated as a valid wanted signal.

Received Signal Strength Indication

Received signal strength is measured by a process resident in the DSP. This process obtains its input from the demodulator (value of RF signal magnitude) and from the AGC (value of present gain). With these two inputs and a calibration factor , t he RF sign al strength at the antenna can be accurately calculated.

24 Functional Description TB7100 Installation and Operation Manual

Calibration

The following items within the receiver path are calibrated in the Factory:

■ front-en d tuning

■ AGC

■ noise squelch

■ RSSI (received signal strength indication)

Information o n th e c al i b ration of these items is given in the on-line help facility of the calibration application.

3.1.3 Audio Processing and Signalling

Audio Processing Raw demodulated data from the r eceiver is processed within the DSP. The

sample rate at this point is 48kHz with signal bandwidth limited only by the IF filtering. Scaling (dependent on the bandwidth of the RF channel) is then applied to normalise the signal level for the remaining audio pr ocessing. The sample rate is decimated to 8kHz and bandpass audio filtering (0.3 to 3kHz) is applied. The base station takes the audio from the receiver mode at Tap R4 by default; this point has no de-emphasis. This tap point can be changed if required, for example, for trunking applications.

Data and Signalling Decoders

The data and signalling decoders obtain their signals from various points within the audio processing chain. The point used depends on the bandwidth of the decoders and whether de-emphasis is required. Se veral decoders may be active simultaneously.

Side Tones Side tones are summed in at the end of the audio-processing chain.

These are tones that pro vide some form of alert or giv e the user confidence an action has been performed. The confidence tones may be generated in the receiver. The side-tone level is a fixed proportion (in the order of –10dB) relative to full scale in the receive path. By default, all audible indicators are turned off.

CODEC The combined audio and side-tone signal is converted to analog form by a

16-bit DA C with integral anti-alias filtering. This is followed by a programmable-gain amplifier with a range of 45dB in 1.5dB steps. The amplifier performs muting. The DAC is part of the same CODEC device (AD6521).

Output to Speakers The output of the CODEC is fed to an audio power amplifier and to the

UI board via a buffer amplifier. The output configu ration of the audio power amplifier is balanced and drives an internal speaker. The power delivered to the speake r is limited by its impedance. The speaker has 16Ω impedance.

TB7100 Installation and Operation Manual Functional Description 25 © Tait Electronics Limited December 2005

3.2 Transmitter Operation

Parts of T ransmitter Board

The main circuit parts of the transmitter board are:

■ transmitter

■ frequency synthesizer

■ CODEC (coder-decoder) and audio circuitry

■ power supply

■ interface circuitry

Software plays a prominent role in the functioning of the board. When describing the operation of the radio the software must be included with the above. This is considered further below.

These functional parts are described in detail below.

Figure 3.3 Transmitter high-level block diagram

ANT

LPF

HARDWARE BLOCK

Dir.

Coup.

Drv

Fin

/Ex

Bias

Pwr Crtl

TCXO:

13.000 MHz

VCO

Loop

PLL

filter

VCXO

Loop

filter

CUSTOM

LOGIC

BLOCK

Triple-point

Equalisation

Frequency

control

Ramp

control

Tap pointT8

Audio

filtering

emphasis

Data and signalling

encoders

KEY

Analog-to-digital conversion

Digital-to-analog conversion

DSP

BLOCK

Pre-

Optional

processing

ALC

HARDWARE

BLOCK

Mic

PGA

SYSTEM connector

PROG/MIC connector

3.2.1 Audio Processing and Signalling

Microphone Input The input to the transmitter path begins at either the SI board or the

PROG/MIC connector of the UI board. Only electret-type microphones are

supported. The audio input is then applied to tap point T8 on the transmitter board (the tap point is user-selectable).

Analog Processing of Microphone Signal

26 Functional Description TB7100 Installation and Operation Manual

The CODEC (AD6521) performs microphone selection and ampli fication. The microphone amplifier consi sts of an amplifier with a fix ed gain of 16dB followed by a programmable-gain amplifier with 0dB to 22dB gain. The amplified microphone signal is conv erted to a digital stream by a 16-bit ADC with integral anti-alias filtering (0.1 to 3.2kHz). The digital stream is transported to the DSP for further audio processing.

Automatic Level Control

DSP Audio Processing

Data and Signalling Encoders

The ALC (automatic lev el control) follo ws, and is used to effectiv ely increase dynamic range by boosting the gain o f the micro phone pre-amplifier under quiet conditions and reducing the gain under noisy acoustic conditions. The ALC function resides in the DSP and controls the microphone programmable-gain amplifier in the CODEC. The ALC has a fast-attack (about 10ms) and slow-decay (up to 2s) characteristic. This characteristic ensures that the peak signal level is regulated near full scale to maximise dynamic range.

The output of the automatic level control provides the input to the DSP audio-processing chain at a sample rate of 8kHz. Optional processing such as encryption or companding is done first if applicable. Pre-emphasis, if required, is then applied. The pre-emphasised signal is har d limited to prev ent o v er deviation , and filtered to r emov e high -frequency components. The sample rate is then interpolated up to 48kHz and scaled to be suitable for the frequency synthesizer.

The data and signalling encoders inject their signals into various points within the audio-processing chain. The injection point depends on the bandwidth of the encoders and whether pre-emphasis is required.

3.2.2 Frequency Synthesizer

Main Parts of Synthesizer

Frequency Control Loop

The frequency synthesizer consists of two main parts:

■ FCL (frequency control loop)

■ RF PLL (phase-locked loop)

The FCL and RF PLL are described br iefly below. Note that patents are pending for several aspects of the synthesizer desi gn.

The FCL consists of the following:

■ TCXO

■ mixer

■ loop filter

■ VCXO (voltage-controlled crystal oscillator)

■ frequency control block

The FCL provides the refere nce frequency for the RF PLL. It generates a high-stability refer ence frequency that can be both modulated and offset in fine resolution steps.

TB7100 Installation and Operation Manual Functional Description 27 © Tait Electronics Limited December 2005

RF PLL

Operation of Control Loop

The RF PLL consists of the following:

■ RF PLL device

■ loop filter

■ VCO (voltage-cont rolled oscillator)

■ VCO output switc h

The RF PLL has fast-locking capability but coarse frequency resolution. The above combination of control loops creates improved frequency generation and acquisition capabilities.

The RF PLL is a conventional integer-N design with frequency resolution of 25 kH z. In transmit mode the loop locks to the transmit frequency.

Initially , the VCO generates an unr egulated frequency in the requir ed range. This is fed to the PLL device (ADF4111) and divided down by a programmed ratio to appr oximately 25kHz. The reference frequency input from the FCL is also divided down to approximately 25kHz. The phase of the two signals is compared and the error translated into a DC voltage by a programmable charge pump an d dual-bandwidth loop filter . This DC signal is used to control the VCO frequency and reduce the init ial error. The loop even tually settles to a point that minimises the phas e error between divideddown reference and VCO frequencies. The net result is that the loop locks to a programmed multiple of the reference frequency.

The FCL generates an output of 13.012±0.004MHz. Initially a VCXO produces a quasi-regulated frequency in the required range. The VCXO output is fed to a mixer where it is mixed with the 13.000MHz TCXO frequency. The mixer, a fter low-pass filtering to remov e unwant ed products, produces a nominal frequency of 12kHz. This is converted to digital form and transported to the frequency-control block in custom logic.

The frequency-contr ol block compares the mixer output frequency with a reference generated by the digital clock and creates a DC error signal. A programmed offset is also added. This error signal is converted to analog form and used to control the VCXO fr equency and r educe the i nitial error . Once settled, the loop locks to the TCXO frequency with a programmed offset frequency. The FCL output therefore acquir es the TCXO’s frequency stability.

Modulation The full bandwidth modulation signal is obtained from the DSP in digital

form at a sample rate of 48kHz. In traditional dual-point modulation systems the modulation is applied, in analog form, to both the frequency reference and the VCO in the RF PLL, combining to produce a flat modulation respon se dow n to DC. Reference m odulation is usually a pplied directly to the TCXO.

28 Functional Description TB7100 Installation and Operation Manual

In the system employ ed in th e transmitter boar d, the fr equency r efer ence is generated by the FCL, which itself r equires dual-point modulation injection to allow modu lation do wn to DC. W ith another modulati on point requi red in the RF PLL, this system therefore requires triple-point modulation. The modulation signals applied to the FCL are in digital form, whereas for the RF PLL (VCO) the modulation signal is applied in analog form. The modulation cross-over points occur at appro ximately 30 and 300Hz as determined by the closed loop bandwidths of the FCL and RF PLL respectively.

Frequency Generation

Fast Frequency Settling

Frequency Acquisition of RF PLL

The RF PLL has a fr equency resolution of 25kHz. Higher resolution cannot be achieved owing to acquisition-time requirements and so for any given frequency the error could be as high as ±12.5kHz. This error is corrected by altering the reference frequency to the RF PLL. The FCL supplies the reference fr equency and is able to adjust it up to ±300ppm with better than

0.1ppm resolution (equi valent to better than 50Hz resolution at the RF frequency).

Both the FCL and RF PLL employ frequency-acquisition speed-up techniques to achieve fast frequency settling. The frequency-acqui sition process of the FCL and RF PLL is able to occur concurrently with minimal loop interaction owing to the very large difference in frequency step size between the loops.

In the RF PLL the loop bandwidth is initially set high by increasing the charge pump current and reducing time constants in the loop filter. As a result settling to within 1kHz of the final value occurs in under 4ms. In order to meet noise performance requir ements the loop parameters are then switched to reduce the loop bandwidth. There is a small frequency kick as the loop bandwidth is reduced. Total settling time is under 4.5ms.

Frequency Acquisition of FCL

The FCL utilises self-calibration techniques that enable it to rapidl y settle close to the final value while the loop is open. The loop is then closed and settling to the final value occurs with an associated reduction in no ise. The total settling time is typically less than 4 ms.

Calibration The following items are calibrated in the frequency synthesizer:

■ nominal frequency

■ KVCO

■ KVCXO

■ VCO deviation

Calibration of the nominal freq uency is achi e v ed b y addi ng a fixed offset to the FCL nominal frequency; the TCXO frequency itself is not adjusted. The items KVCO and KVCXO are the control s ensitivities of the RF VCO (in MHz/V) and VCXO (in kHz/V) res pectively. The latter has temperature compensation.

TB7100 Installation and Operation Manual Functional Description 29 © Tait Electronics Limited December 2005

3.2.3 RF Power A mplifier

RF Power Amplifier and Switching (50W/40WVersion)

RF Power Amplifier and Switching (25W Version)

Output of RF Power Amplifier

The RF power amplifier and exciter of the 50W/40W radio is a five-st age line-up with approximately 40dB of power gain. The output of the frequency synthesizer is first buffer ed to reduce kick during pow er ramping. The buffer output goes to a discrete exciter that pr oduces appro ximately 300 to 400mW output. This is follo w ed b y an LDMOS driv er pr odu cing up to 8W output that is power-controlled. The final stage consists of two parallel LDMOS devices pr oducing enoug h pow er to pro vi de 40 to 50W at the RF connector.

The RF power amplifier of the 25 W version is a four-stage line-up with appro ximately 37dB of power gain. The output of the frequency syn thesizer is first buffered to reduce kick during power ramping. The b uffer output goes to a broad-band exciter IC that produces appro ximately 200mW output. This is follo wed by an LDMOS driver pr oducing up to 2W output that is power-contro lled. The final stage consists of two parallel LDMOS devices pro ducing enough power to provide 25W at the RF connector.

The output of the RF P A passes thr ough a dual-directiona l coupler, used for power control and monitoring. Finally, the output is low-pass-filtered to bring harmonic levels within specification.

Power Control The steady-state power output of the transmitter is regulated using a

hardwar e contr ol loop . The forw ard po w er output fr om the RF PA is sensed by the directional coupler and fed back to the power control loop. The PA output power is controlled by v arying the driv er gate bias voltage that has a calibrated maximum limit to pre vent over drive. The power control signal is supplied by a 13-bit DAC driven by custom logic.

Ramping Power ramp-up consists of two stages:

■ bias

■ power ramping

The timing between these two stages is critical to achieving the correct overall wave shape in order to meet the specification for transient AC P (adjacent channel power). A typical ramping waveform is shown in

Figure 3.4.

30 Functional Description TB7100 Installation and Operation Manual

Figure 3.4 Typical ramping waveforms

Power

Bias

ramp

Power

ramp

High power

powerLow

ramp

Bias

ramp

Time

Bias Ramp-up

The steady-state final-stage bias level is supplied by an 8-bit DAC programmed prior to ramp-up but held to zero by a switch on the DAC output under the contr ol of a release by the

TX INHIBIT signal with the ramping shape being determined by

TX INHIBIT signal. Bia s ramp -u p begins upon

a low-pass filter. Owing to power leakage through the P A chain, ramping the bias takes the PA output power from less than –2 0dBm for the 50W/40W version or –10dBm for the 25W version to approxima tely 25dB below steady-state power.

Power Ramp-up The power ramp signal is supplied by a 13-bit DAC that is controlled by

custom logic. The ramp is generated using a look-up table in custom logic memory that is played back at the correct rate to the DAC to produce the desired waveform. The ramp-up and ramp-down waveforms are produced by playing ba ck the look-up tab le in forw ard and r e verse order respectively . For a given power lev el th e look-up table values are scaled b y a steady-state power constant so that the ramp waveform shape remains the same for all power levels.

TB7100 Installation and Operation Manual Functional Description 31 © Tait Electronics Limited December 2005

3.3 User Interface Operation

This section describes the programming/microphone connector and the controls of the user inter face, and the function of the UI board.

Figure 3.5 shows the controls and indicators of the user interface.

Figure 3.5 User interface

status LEDs

2-digit LCD

programming/

microphone

connector

Programming/ Microphone Connector

TX/RX Switch The TX/RX sw itch changes the LCD display to sho w either the t ransmitter or

Tx/Rx

switch

display

The PROG/MIC connector can be used to connect a handset or a pr ogramming cable.

the receiv er channel. The

TX/RX switch also determines which board will be

volume controlfunction keys and LEDs

internal speaker

programmed by the programming or calibration applications. The programming application is a pro gram on a PC that is connected to the

base station via the

PROG/MIC connector . Theprogramming application

enables the user to pro gram the base station with t he requ ired chann els and subaudible signalling settings. The transmitter and receiver modules are programmed individually according to the setting of the

TX/RX switch.

The calibration application is a program on a PC that is connected to the base station via the

PROG/MIC connector. The transmitter and receiver

modules are designed to be totally electronically tuned. N o physical tuning is required, as all tuning is done by electronic trimming. The calibration application can assist in the tuning of:

■ AD6521 CODEC voltage reference

■ TCXO frequency

■ receiver front end

■ transmitter driver and final gate bias limit

■ transmitter power control

■ deviation and squelch.

32 Functional Description TB7100 Installation and Operation Manual

Function Keys

Pressing the function keys will activate the functions assigned using the programming application. Function keys may have functions assigned to both short and long key presses. A short key press is less than one second, and a long ke y press is more than one second.

Volum e Control and Internal Speaker

Rotate the volume contr ol poten tiometer clockwise to incr ease the speak er volume and counterclockwise to decrease the volume. By default, the base station is programmed not to generate any audible indicators.

UI Board The UI board is connected to the receiver and transmitter modules via

separate 18-way ribbon cables. The internal speaker is connected to the UI board via a cable with a mating connector for easy disconnection. If an internal AC Power supply is fitted, a fan power signal is routed from the fan powe r board to the fan via the UI board. For mor e information on the connectors and their signals, refer to “UI Board Connectors” on

page 75. Figure 3.6 on page 34 shows a block diagram of the UI board.

The UI board does not include a microprocessor. A synchronous bidirectional serial interface provides communication of key status, LCD and LED-indicator data between the transmitter/receiver modules and the UI board. The serial data is converted to or from a parallel form by a number of shift registers for the function ke ys and indicators. For the LCD, the serial data is fed to a driver IC that converts the serial data to a form suitable for the LCD. The keys are scanned and the LCD and LED indicators updated approximately every 50ms. The

TX/RX switch controls what is displayed on

the LCD and also whether the transmitter module or the receiver module will be programmed.

TB7100 Installation and Operation Manual Functional Description 33 © Tait Electronics Limited December 2005

Figure 3.6 UI board block diagram

UI Board

Speaker

Receiver

Module

Transmitter

Module

+13V8

+3V3 SpeakerAudio Volume Level (DC) Rx SPI Data Rx Prog Data

Rx SPI Data

Rx Prog Data

PTT MicAudio

+13V8

+3V3

Receiver SPI Shift

Registers

Transmitter

SPI Shift

Registers

Electronic Switching

Volume Control

+3V3

Power

LED

Busy

LED

Function Keys and

LEDs

LED

LCD

Tx/Rx

Switch

+13V8

Prog/Mic

Connector

Fan Power

Fan

Connector

Board

34 Functional Description TB7100 Installation and Operation Manual

3.4 System Interface Operation

This section describes the functioning of the system interface. The system interface provides:

■ internal power distribution

■ internal AC/external DC switching

■ serial data connection (THSD or FFSK)

■ fan control

■ general purpose IO

■ receiver audio processing

■ transmitter audio processing

■ opto-isolated keying

■ rela y output

■ received signal strength indication (RSSI)

■ receiver gate output

■ receiver inhibit input

■ 13.8VDC (1.5A) output

■ tone on idle (TOI).

These functional parts are described in detail below.

TB7100 Installation and Operation Manual Functional Description 35 © Tait Electronics Limited December 2005

Figure 3.7 SI board block diagram

Transmitter

Module

13.8V AUD IN

SI Board

13.8V

4.5V

3.3V

13.8V out

13.8V

Mains fail signal

Power Supplies

Fuse

13.8V

AC Power

Supply Unit

DC Power

Connector

AGND IN

13.8V out

9V 4.5V

RXAUDIO OUT

RX LINE OUT

Audio

TOITONE

TX INAUDIO

TX LINE IN

4.5V

System

Connector

3.3V

Receiver

Module

Temperature

Sensor

Fan Power

Board

AUX IO TX KEY TX DATA

13.8V AUD OUT AUX IO RX GATE RSSI

RX DATA

Control

and

Signalling

13.8V

3.3V

Fan Control

TX KEY

RX INHIBIT

RELAY DRIVER

OPTO

DIG IO TX DIG IO RX DIG IO

RX GATE

RSSI

TXD

RXD

Serial Data

Connector

36 Functional Description TB7100 Installation and Operation Manual

3.4.1 Internal Power Distribution

This section details ho w the i nput power feed is distributed throughout the base station to powe r its various sub-systems. Refer to Figure 3.8 for more information.

Figure 3.8 Powe r distribution

Prog/Mic

UI Board

Connector

Frequency

Synthesizer

Module

Receiver

CWID

SI Board

13.8V

Audio

Power

Supply

Circuitry

13.8V

Mains fail signal

13.8V

CODEC

andAudio

3.3V

Circuitry

Data

Power

Circuitry

3.3V

Supply

Circuitry

Fuse

4.5V

2.5V

Receiver

Control

Circuitry

Digital

Circuitry

Fan Control

Connector

DC Power

Board

Interface

Fan

Power

Board

Frequency

Synthesizer

Module

Transmitter

13.8V

Power

CODEC

Supply

Circuitry

andAudio

3.3V

Board

Digital

Transmitter

2.5V

Interface

Power

Source

AC Power

Supply Unit

Power

Source

13.8V DC This is from either the DC input on the rear of the base station, or from an

optional internal AC po w er s upply unit. When AC mains is present, power will not be drawn from the DC input. The DC power input of the base station is protected by a r ear panel fuse . The 13.8V is distributed directly to

TB7100 Installation and Operation Manual Functional Description 37 © Tait Electronics Limited December 2005

the receiver and transmitter boards and to the 13.8VDC output on the

SYSTEM connector, rated at 1.5A. The 13.8VDC is also used to power the

fans, via control circuitry. Note The UI board obtains 13.8V and 3.3V from the receiv er module

and outputs 13V8_SW to the

3.3V, 4.5V, 9V, 13.8V The other voltages derived on the SI board are used only on the SI board.

PROG/MIC connector.

3.4.2 Serial Data

THSD Tait High Speed Data (THSD) is a proprietary protocol of Tait Electronics

Limited that can be used with the base station. This allows the base station configured in either data r epeat er or data modem modes to pass data sp eeds up to 12kbps on a narrow-band channel and 19.2kbps on a wide-band channel. 1200-baud Fast Frequency Shift K eyed ( FFSK) data is also av ailable as an option.

3.4.3 General Purpose IO

The transmitter and receiv er boards can be pr o grammed to act upon signals from the SI board and also outputs signals for certain conditions. These settings are discussed in “Preparation for Operation” on page 77.

3.4.4 Receiver Audio Processing

The SI board pr ovides an external 600Ω balanced 4-wire line for con necting 4-wire circuits of which two are used by the r eceiver for receive audio.

The SI board pr ovides an unbalanced audio output for connecting to other devices. Output levels can be set via the rear panel.

3.4.5 Tone On Idle

The tone-on-idle (TOI) fr equency is generated by the SI board and fed directly to the receiver line out. It is enabled using links on the SI board. These settings are discussed in “Preparation for Operation” on page 77. If enabled, the output of the TOI is switched by the receiver gate.

3.4.6 Transmitter Audio Processing

The SI board pr ovides an external 600Ω balanced 4-wire line for con necting 4-wire circuits of which two are used by the transmitter for transmit audio.

38 Functional Description TB7100 Installation and Operation Manual

The SI board pro vides an unbalanced audio input and output for connecting to other devices.

3.4.7 Opto Isolated Keying

External keying of the base station can be achieved using the current regulated optically isolated keying connections.

3.4.8 Relay Out put

The SI board can pro vide a rela y output with a load voltage of 350V or load current of 120mA continuous. The SI board can also provide a r ela y driver output. Both these options ar e configurab le and these settin gs ar e di scuss ed in “Preparation for Operation” on page 77.

3.4.9 Fan Control

There are three modes of operation for the fans. The modes are:

■ on continuous

■ on when transmitting

■ on at a pre-defined temperature.

The modes of operation are selected b y links on the SI board. These settin gs are discussed in “Preparation for Operation” on page 77.

3.4.10 RSSI

A received signal strength indication (RSSI) voltage is developed by the receiver module and applied directly to the SI board rear panel.

3.4.11 Receiver Gate

The receiver gate signal is used by the SI board to control TOI and a relay output. The receiver gate output on the external equipment such as TaitNet trunking controllers.

SYSTEM connector can be used for

3.4.12 Receiver Inhibit

The receiver inhibit input on the SYSTEM connector is used to control the receiver gate signal. This may be used in linking applications to prevent unwanted receiver audio signals from appearing at the SI board output connector.

TB7100 Installation and Operation Manual Functional Description 39 © Tait Electronics Limited December 2005

3.5 Fan Operation

The cooling fans are mounted behind the front panel. All fans in the chassis must be of the same type.

Dissipation of Heat Heat needs to be dissipated from a number of components within the

internal AC pow er supply un it, transmitter and recei ve r modules, including the following:

■ 9V r egulator

■ RF PA

■ driver for RF PA

■ audio PA

The mechanisms by which the heat is conducted away in each case are described below.

Dissipation of Heat from Transmitter

Dissipation of Heat from Regulator and Audio P A

Dissipation of Heat from RF P A s and Driver

Dissipation of Heat from Internal AC Power Supply Unit

The transmitter board is mounted directly onto a heatsink thr ough which the forced air from the fans is ducted.

Heat from the audio PA and 9V regulator on the receiv er board is conducted away by a small aluminium heatsink and mounting boss. The heatsink and boss contact the underside of the board where the components are mounted and thermal paste ensures a good thermal transfer between the two surfaces.

Heat from the RF PAs and driver is conducted to the heatsink through a copper separator plate. The copper plate is fixed to the underside of the board and the components soldered directly to it. The copper plate is mounted directly to the main heatsink boss and a coating of thermal paste ensures good thermal transfer between these two surfaces.

Air is forced r ound major component s within the internal AC po w er supply unit to keep them cool. Some air is passed t hr ough a small heat sink to k eep the current-carrying semiconductor devices cool.

40 Functional Description TB7100 Installation and Operation Manual

4 Installation

This section describes how to install the base station in a standard 19-inch rack or cabinet. It also provides some general information on safety precautions and site req uir ements . We recommend that you re ad the entire section before beginning the installation.

4.1 Personal Safety

4.1.1 Lethal Voltages

The base station ma y be fitted wi th an internal A C po wer supply unit. If an internal AC pow er supply unit is fitted , a standard ICE A C pow er connector is fitted in the rear panel of the base station (refer to “AC Power

Connect i o n” on page 66).

Warning!! The internal AC power supply unit contains

voltag es that ma y be lethal. Refer to the ratings label on the rear of the bas e station. The internal AC power supply contains no user-servicable parts.

Important Wrong mains v oltage! Befor e connecting to the A C po w er

connector, ensure that the internal 115V/230V voltage mains selector switch is set to the correct mains voltage.

The voltage selector switch is located under the base s tation cov er . (Refer to

“Setting the AC Mains Input Voltage” on page 50.)

The base station must be installed so that the rear of the base station is located in a service access area. The internal AC po w er supply unit m ust be connected to the mains supply source by trained personnel in accordance with local and national regulations.

Ensure that all power sources (AC and before opening the base station.

DC) are disconnected

TB7100 Installation and Operation Manual Installation 41 © Tait Electronics Limited December 2005

4.1.2 Explosive Environments

Warning!! Do not operate base station equipment near

electrical blasting caps or in an explosive atmosphere. Operating the equipment in these envir onments is a definite safety hazard.

4.1.3 Proximity to RF Transmissions

Do not operate the transmitter when someone is standing within 90cm (3ft) of the antenna. Do not operat e the transmitter un less y ou ha ve ch ecked tha t all RF connectors are secure.

4.1.4 High Temperatures

Take care when handling a base station which has been operating recently. Under extreme operating conditions (+60°C [+140°F] ambient air temperature) or high duty cycles the external surfaces of the base station can reach temperatures of up to +80°C (+176°F).

4.2 Equipment Safety

4.2.1 ESD Precautions

Important This equipment contains devices which are susceptible to

damage from static charges. You must handle these devices carefully and according to the proced ures described in the manufacturers’ data books.

We recommend you purchase an antista tic be nch kit from a reputable manufacturer and install an d test it according to the manu facturer’s instructions. Figure 4.1 shows a typical antista ti c bench set-up.

You can obtain further information on antistatic pr ecautions and the dangers of electrostatic discharge (ESD) from standards such as ANSI/ESD S20.20-1999 or BS EN 100015-4 1994.

42 Installation TB7100 Installation and Operation Manual

Figure 4.1 Typical antistatic bench set-up

common point ground (building ground or mains ground via 1MΩ series resistor)

4.2.2 Antenna Load

The base station has been designed to operate safely under a wide range of antenna loading conditions. However, damage will occur if the load is removed while the base station is transmitting. Transmitting into a low VSWR will m ax imise the power delivered to the antenn a .

conductive wrist strap dissipative rubber

bench mat

4.2.3 Equipment Grounding

To ensure safe operation, the base station must be correctly grounded as described in these installation instructions.

4.2.4 Installation and Servicing Personnel

The base station should be installed and serviced only by qualified personnel.

4.3 Regulatory Information

4.3.1 Distress Frequencies

The 406 to 406.1MH z frequency range is reserved worldwide for use by Distress Beacons. Do not pr o gram transmitters to operate in this fr eque ncy range.

TB7100 Installation and Operation Manual Installation 43 © Tait Electronics Limited December 2005

4.3.2 FCC Compliance

This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference.

4.3.3 Unauthorised Modifications

Any modifications y ou make to this equi pment which are not authorised by Tait Electronics Ltd. may in v alidate y our compliance authority’ s appro v al to operate the equipment.

4.3.4 Health, Safety and Electromagnetic Compatibility in Europe

In the European Community, radio and telecommunications equipment is regulated by Dir ectiv e 1999/5/E C, also known as the Radio and Telecommunications Terminal Equipment (R&TTE) directive. The requirements of this dir ectiv e include pr otection of health and sa fety of users, as well as electromagnetic compatibility.

Intended Purpose of Product

This product is an FM radio transceiver. Its intended purpose is for radio communication in Private Mobile Radio (PMR) services or Public Access Mobile Radio (PAMR) services.

Declaration of Conformity

Important This product can be programmed for frequencies or emis-

sions that may make its use illegal. A license must be obtained before this product is used. All license requirements must be obs erved. Limita tions may ap ply to transmitter pow er, operating frequency, channel spacing, and emission.

Brief Declarations of Conformity appear on page 141. You can download the formal Declaration of Conformity from http://eudocs.taitworld.com/. Yo u can als o ob t a i n a sig n e d and dated paper copy of the De cl aration of Conformity from Tait Europe Ltd.

1. Refer to the specifications manual for more information on the compliance standards to which the base station has been tested and approved.

44 Installation TB7100 Installation and Operation Manual

4.4 Environmental Conditions

4.4.1 Operating Temperature Range

The operating temperature range is –30°C to +60°C (–22°F to +140°F) ambient temperature for the 25W base station and –30°C to +50°C (–22°F to +122°F) ambient temperature for the 50W and 40W base stations. Ambient temperature is defined as the temperatur e of the air at the intake to the cooling fans.

4.4.2 Humidity

The humidity should not exceed 95% relative humidity through the specified operating temperature range.

4.4.3 Dust and Dirt

For uncontrolled environments, the level of airborne particulates must not exceed 100µg/m

4.5 Grounding and Lightning Protection

4.5.1 Electrical Ground

The base stati o n modules are ground ed by physical contact between the module mounting points and the chassis. To ensure a good ground connection you must tighten each module securely (for the correct torque refer to “Replacing Modules” in the installation and operation manual).

A threaded grounding connector is provided on the rear of the tray for connection to the site ground point (for more details ref er to “Connections”

on page 65).

4.5.2 Lightning Ground

It is extremely important for the security of the site and its equipment that you take adequate precautions against lightning strike. Because it is outside the scope of this manual to provide comprehensive information on this subject, we recommend that you conform to your country's standards organisa t i on or regulatory body.

TB7100 Installation and Operation Manual Installation 45 © Tait Electronics Limited December 2005

4.6 Recommended Tools

It is beyond the scope of this manual to list every tool that an installation technician should carry. However, the following tools are specifically required for installing the base station:

■ Philips #2 tip screwd river used to connect the DC power cables to the

DC power terminals

■ Pozidriv PZ3 screwdrive r for the M6 screws used to secure the tray to

the cabinet in Tait factory-assembled systems

■ Torx T10 screwdriver for the M3 pan head screws with captur e d shake-

proof was her and flat washer used to secure the modules in the tray

■ Torx T10 screwdriver for the M3 countersunk scr ews us ed to secur e the

cover and the heatsink channels to the tray

■ P ozidriv PZ1 screwdriver for the M3 pan head se lf-tapping screws used

to secure the fans.

You can also obtain the TBA0ST2 tool kit fro m your nearest Tait dealer or Customer Service Organisation. It contains the basic tools needed to instal l, tune and service the base station.

4.7 Ventilation

Alwa ys ensur e there is adequat e ven tilation around th e base station. Do not operate at high duty cycles in a sealed cabinet. You must keep the ambient temperature within the specified range, and we strongly recommend you ensure that the cooling airflo w is not restricted.

Important The cooling fans are mounted behind the front panel.

To ensure adequate airflo w thr ough the base st ation, do not operate it for more than a fe w minutes with the fans disconnected (e.g. fo r se rvicin g purp os e s).

4.7.1 Cabinet and Rack Ventilation

Refer to Figure 4.2 on page 47. Adequate cooling airflow is critical to the performance of the base station.

The cooling airflow for the base station enters through the front panel and exits at the rear of the tray. For optimum thermal performance, the heated air that has passed thr ough a base station must not be allo wed to re-enter the air intakes on the front panel.

Each base station requires an unobstr ucted airflow of 18m

/h (11 cfm).

To allow enough cooling airflow through a cabinet mounted base station we recommend the following:

46 Installation TB7100 Installation and Operation Manual

Figure 4.2 Typical cabinet ventilation requirements

20cm (8in)

side view front view

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

top view

≥10cm (≥4in)

ventilation slots

blanking panels

airflow entry

airflow exit

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

RF1

VOLUME

TF1

BUSY

TF2 RF2

TB7100 Installation and Operation Manual Installation 47 © Tait Electronics Limited December 2005

■ a distance of 5cm minimum clearance to any obstruction to the fro nt of

the tray.

■ an open area of at least 50cm

(8in2) per tray of ventilation slots or louvres in front of the air intakes for the fans for each tray; f or exampl e ten 6×85mm (0.25×3.3in) slots will allow the recommended airflow.

■ a distance of 10cm minimum clearance to any obstruction to the rear of

the tray.

■ an open area of at least 50cm2 (8in

) per tray of ventilation slots or

louvres in the top of the cabinet, or to the re ar of each tray.

■ a 2U gap at the top of the cabinet.

Note The ventil ation opening m ust be un rest ricted. If the slots or holes

are covered with a filter, mesh or grille, the open area must be increased to allow the same airflow as an unrestricted opening.

The maximum ambient temperature entering the cabinet must not exceed the maximum temperature specified for the base station.

If the base station is installed in a rack or cabin et with other equ ipment with different ventilation requirements, we recommend that the base station be positioned below this equipment.

Auxiliary Extractor Fans

If multiple base stations are fitted in a cabinet, auxiliary extractor fans may be required to ensure adequate cooling. If fitted they should be capable of extracting 18m

/h (11 cfm ) per base station in the cabinet.

If you have any other configuration, the performance of your system will depend on how closely you comply with the base station airflow requirements described above.

48 Installation TB7100 Installation and Operation Manual

4.8 Installing the Base Station

4.8.1 Unpacking the Equipment

Unpacking the Base Station

The base station is packed in a str ong corrugated cardboar d carton with top and bottom foam cushions.

1. Cut the tape securing the flaps at the top of the carton and fold them flat against the sides.

2. Rotate the carton carefully onto its side and then ont o its top, ensuring that none of the flaps is trapped underneath.

3. Slide the carton upwards over the foam cushions and lift it away. Remove the cushion from the bottom of the base station.

4. Lift the base station clear of the rem aining cushion.

Disposal of Packaging

If you do not need to k eep the packaging, we r ecommend that you recycle it according to y our local recycling methods. The foam cushions ar e CFCand HCFC-free and may be burnt in a suitable waste-to-energy combustion facility, or compacted in landfill.

4.8.2 Identifying the Mechanical Configuration

The base station is available in two different mechanical configurations— with or without provision for an internal AC power supply unit.

The mechanical configuration with provision for an internal AC power supply has the following distinguishing features:

■ larger air intake on the right-hand side of the front panel

■ pro vis ion for A C con nector on the left-hand side o f the r ear p anel (r efer

to Figure 6.2 on page 66)

■ ground point on the right-hand side of the rear panel rather than on the

left-hand side

■ different SI board and internal cables.

TB7100 Installation and Operation Manual Installation 49 © Tait Electronics Limited December 2005

4.8.3 Power Supply Options

The base station is av ailab le with or without an internal AC power supply unit.

All base stations have an external DC input po w er co nnector which is used as main power supply when no internal AC power supply unit is fitted.

When the internal AC po wer supply unit is fitted, t he DC input can be used as a DC backup power option. In case of AC mains failure the ba se station will automatically and seamlessly switch to DC power input.

If no internal AC po wer s upply unit is fitted, an external T ait T80 9-10-87xx power supply can be used to supply the DC voltage required.

4.8.4 Setting the AC Mains Input Voltage

Warning!! The internal AC power supply unit contains

voltages that ma y be lethal. Refer to the ratings label on the rear of the base station.

Ensure that all power sources (AC and DC) are disconnected before opening the base station.

1. Disconnect all power sources before opening the base station.

2. Use a Torx T10 screwdriver to remove the 15 countersunk screws securing the cover to the tray.

3. Set the 115V/230V AC mains voltage se lector s witch to t he correct AC mains input voltage (Figure 4.3).

Figure 4.3 115/230V AC mains voltage selector switch

115/230V AC mains voltage selector switch

50 Installation TB7100 Installation and Operation Manual

4.8.5 Mounting the Base Station

1. Fit the base station into the cabinet or rack and secure it firmly with

an M6 (or 0.25in if you are using imperial fittings) screw, flat and spring washer in each of the four main mounting holes in Figure 4.4 on page 51.

2. The base station can be wall- mounted by r otating t he front m ounting

brackets and fitting the optional rear brackets (TBBA03-01). When the base station is w all- mounted ensur e the a irflo w is fr om bottom to top (front panel mounted down) or side to side.

3. For transport or in installations subject to vibration, the base station

should be supported at the rear using a transit bracket (Tait recommends to use the TB7100 transit bracke t, Tait part number 302-05282-00).

Figure 4.4 Base station mounting points (configuration with AC power supply unit shown)

b, as shown

main mounting holes

base station

ground point

DC power connector

AC power connector

rack frame

TB7100 Installation and Operation Manual Installation 51 © Tait Electronics Limited December 2005

4.8.6 Cabling

We recommend that you route all cables to and from the base station along the side of the cabinet so the cooling airflow is not restricted.

Cables should be well supported so that the connectors or terminals on the base station and on the ends of the cables do not have to support the full weight of the cables.

Cables must be routed so that they do not restrict the air outlets at the rear of the base station.

4.8.7 Accessories

The base station can use the following accessories:

■ T809-10-87xx power supply

■ TBBA03-01 wa ll moun ting kit

■

TBBA03-02 duplexer kit (mechanical configuration without internal AC power supply unit)

■ TBBA03-03 duplexer kit

(mechanical configuration wit h internal AC power supply unit)

■ TMAA02-01 fist microphone.

52 Installation TB7100 Installation and Operation Manual

5 Rep lacing Modules

This section describes how to:

■ remove and open and close the base station

■ remove and fit the modules and components

General Important Before disassembling the base station, disconnect the base

station fro m a ny test equipment or power supply.

Disassemble only as much as necessary to replace the defective parts. Inspect all disassembled parts for damage and replace them, if necessary. Observe the torque settings indicated in the relevant figures.

Important To ensure adequate airflow thr ough the base sta tion, do not

cov er the fan intake grill on the front panel. Do n ot operate for more than a few minutes with the fan intake covered.

Saving the Base Station Configuration

Important The transmitter and receiv er modules must on ly be replaced

with base station modules.

Before replacing a module in th e base station, you sho uld decide whether you need t o sa ve its configuration data. If you are unsure whether you have a record of the configurat ion, use the Pr o gramming Application to r ead the base station and save the configuration files before removing any modules. Once you ha v e replaced the module , y ou will be able to re store the original configuration by programming the saved configuration back into the base station. If one or more of the modules is faulty, you may be unable to read the base station. In thi s case , y ou will have to restore the configurati on fr om a back-up file. Refer to the section “Preparation for Operation” on page 77 for more information.

TB7100 Installation and Operation Manual Replacing Modules 53 © Tait Electronics Limited December 2005

5.1 Removing the Base Station and Opening the Tray

Important The modules in the base station are not hot-pluggable. It is

recommended the tray is r emov ed from the rack before an y modules are replaced.

Figure 5.1 Opening the tray

Configuration with i nte r nal A C power supply unit sho wn

1. If an internal AC Power supply is fitted, disconnect the base station from AC power

2. Remove the fuse base station from DC power.

3. Use a Philips #2 screwdriver to disconnect the cables from the DC power connector

4. Disconnect the antenna connectors for transmit and receive

5. Disconnect any other connectors.

6. Disconnect the ground cable from the ground point

7. Use a PZ2 Pozidriv screwdriver to remove the four M6 screws, and remove the base station from the rack.

e at the rear of the base station to disconnect the

8. Use a Torx T10 screwdriver to remove the 15 countersunk screws. Remove the tray cover

54 Replacing Modules TB7100 Installation and Operation Manual

5.2 Replacing the UI Board

Removal 1. Remove the volume knob by pulling slowly but firmly. The knob is

a friction fit and can leave the collet behind on th e shaft. If this happens, remove the collet from the shaft and place inside the knob.

2. Disconnect the speaker connector

3. Use a Torx T10 screwdriver to remove the three screws

with the spring washers and flat washers.

4. Insert the card remover tool (220-02034-xx) from the tool kit

(TBA0ST2), or a small flat-bladed screwdriver into the two small holes at the bottom of the UI board. Lever the board completely off the spring clips

5. Carefully slide the UI boar d towards the rear of the base stat ion until

the volume-con trol shaft clears the front panel. Lift the UI boar d clear of the chassis.

6. Disconnect the two Micro-MaTch connectors

Figure 5.2 Remov ing the UI board

4.5lb·in ( 0.5N·m)

c together

Torx T10

Cables not shown.

Fitting 1. Plug the two Micro-MaTch connectors e into the UI board.

The Micro-MaTch connector for the transmitter is closest to the edge of the UI board.

2. Align the vo lume- control shaft

align the pro gramming/microphone connector a nd function buttons as the board is slid into place.

3. Gently slide the UI board into positi on so th at the spring clips

engaged. Press firmly around the spring clips to ensure they are engaged fully.

4. Use a Torx T10 screwdriv er to fasten the three scr e ws

(0.5N·m).

5. Plug the speaker connector

6. Fit the volum e knob onto the shaft and press firmly until fully seated.

with the hole in the front panel, also

c to 4.5lb·in

b into the UI board.

d are

TB7100 Installation and Operation Manual Replacing Modules 55 © Tait Electronics Limited December 2005

5.3 Replacing the Receiver Module

Removal Note Release the latch underneath the DC power connector before

attempting to disconnect it.

1. Disconnect the cables to the RF

d, and the user interface e connectors.

2. Use a Torx T10 screwdriver to remove the five screws together with the spring washers and flat washers.

3. Lift the receiver module clear of the chassis.

4. Make sure not to lose the metal heatsink

Figure 5.3 Replacing the receiver module

Torx T10

4.5lb·in

b, DC powe r c, system interface

f and g

g for the audio PA.

Check that links LK2, LK3 and

Torx T10

4.5lb·in

Cables not shown.

LK4 are not fitted.

Note Although the boards of the transmitter and r eceiv er modu les look

alike, the board on the transmitter module can not replace a receiver module. There is no heat transfer plate on the receiver module. Check that the replacement module has lin ks LK2, LK3 and LK4 not fitted as shown in Figure 5.3.

Fitting Note Before fitting the recei ver module, mak e sure that the metal heat-

sink

h for the audio PA is fitted to the tra y chassis.

1. Place one screw

g into the hole above the metal heatsink plate by:

a. holding the module at a 60° angle b. fitting the screw on the Torx driver c. slipping it through the shield hole and into the board hole.

2. Position the receiver module inside the tray chassis.

3. Use a Torx T10 torque-drive r to tighten the screws

f and g to

4.5lbf·in (0.5N·m).

4. Connect the cables to the RF and user interface

56 Replacing Modules TB7100 Installation and Operation Manual

e connectors.

b, DC power c, system interface d,

5.4 Replacing the Transmitter Module

Removal Note Release the latch underneath the DC power connector before

attempting to disconnect it.

1. Disconnect the cables to the RF

d, and the user interface f connectors.

2. Use a Torx T10 screwdriver to rem ove the screw

temperature sensor to the heatsink.

3. Use a Torx T10 screwdriver to rem ove the four s crews

the heatsi nk to the tray chass i s.

4. Lift the transmitter module clear of the tray chassis.

Figure 5.4 Replacing the transmitter module

Torx T10

4.5lb·in

b, DC powe r c, system interface

h fastening the

g fastening

Check that links LK2, LK3 and LK4 are not fitted.

Torx T10

Fitting Note Although the boards of the transmitter and r eceiver modules look

4.5lb·in

alike , the board on the transmitter module can not replace a receiver module. There is no heat transfer plate on the receiver module. Check that the r eplacement module h as link s LK2, LK3 and LK4 not fitted as shown in Figure 5.4.

1. Position the transmitter module inside the tray chassis.

2. Use a Torx T10 torque-driver to fasten the four screws

(0.5N·m).

3. Use a Torx T10 torque-driver to fasten the temperature sensor with

the screw

4. Connect the cables to th e RF

and the user interface

Cables not shown.

h to 4.5lbf·in (0.5N·m).

f connectors.

g to 4.5lbf·in

b, DC po wer c, system inte rface d,

TB7100 Installation and Operation Manual Replacing Modules 57 © Tait Electronics Limited December 2005

5.5 Replacing the SI Board

Removal 1. Disconnect the system interface cables e to the transmitter and the

receiv er, the fan control cab le the mains power present cable, and move them to one side.

f, the temperature sensor cable g, and

2. Remove the DC power cables Note the connection positions.

3. Use a Torx T 10 screwdr iver to remove the two screws Use a PZ1 Pozidriv screwdriver to remove the screw heatsink of U406.

4. Carefully lift the front of the SI board off the spring clips

5. Carefully slide the SI board to war ds the fr ont of the base sta tion until the connectors clear of the chassis.

Figure 5.5 Replacing the SI board

b, c and d clear the rear panel. Lift the SI board

h and move them to one side.

i on the

1).

c d

Torx T10

4.5lb·in

PZ1

4.5lb·in

1) ef

Fitting 1. Slide the SI board into the tra y chassis by fitting the connectors b, c

and

d into the rear panel.

2. Press down firmly on the front of the SI board to engage the two spring clips

Important Make sure that the thermal pad is fitted under and the

3. Use a torque-driver to fasten the tw o scre ws

plastic insulating w a sher is fitted on U406.

Cables not shown.

j (Torx T10) the screw

i (PZ1) on the heatsink of U406 to 4.5lb·in (0.5N·m).

4. Connect the system interface cables receiv er, the fan control cab le the DC power cables

58 Replacing Modules TB7100 Installation and Operation Manual

f, the temperature sensor cable g, and

e to the transmitter and the

5.6 Replacing the Transmitter and Receiver Fans

Removal 1. Use a Torx T10 screw driver to remove the four screws b securing

the fan duct

d in the tray chassis.

2. Disconnect the fan control loom from the fan power board

Slide back the fan duct

3. Unplug the fan to be replaced from the fan power board

fan duct

4. Use a PZ1 Pozidriv screwdriver to remove the two M3×25mm

screws

Figure 5.6 Replacing the transmitter and receiver fans

e and remove the fan.

d and lift clear.

PZ1

4.5lb·in

def

c on the

Torx T10

4.5lb·in

Fitting 1. Place the fan into position on the fan duct e and use a PZ1

screwdriv er to fasten the tw o M3×25 screws

2. Thread the fan cable through the hole in the side of the fan duct.

Plug the fan into the fan power board

3. Slide the fan duct

the fan power board

4. Use a Torx T10 screwdriver to fasten the four screws

(0.5N·m).

TB7100 Installation and Operation Manual Replacing Modules 59 © Tait Electronics Limited December 2005

d into the chassis . Plug the fan control loom into

e to 4.5lb·in (0.5N·m).

b to 4.5lb·in

5.7 Replacing the Fan Power Board

Note The fan pow er boa rd i s man ufactured as pa rt of the UI boar d a nd

cannot be ordered se parately. For more information, refer to “Spare Parts” in the service manual.

The circled numbers in this section refer to the items in Figure 5.6 on

page 59.

1. Disconnect the fan control cable and the fan cables from the fan power board

2. Use a T orx T10 screwdriver to remove the screw power board

3. Fitting is carried out in reverse order .

c to the fan duct d.

f attaching the fan

5.8 Replacing the Temperature Sensor Board

Note The temperature sensor board is manufactured as part of the

SI board and cannot be ordere d separately. For more information, refer to “Spare Parts” in the service manual.

1. Disconnect the temperature sensor cable from the SI board (Figure 5.5,

2. Use a Torx T10 screwdriver to remove the screw (Figure 5.4, attaching the temperature sensor board to the transmitter module.

3. Fitting is carried out in reverse order .

g).

60 Replacing Modules TB7100 Installation and Operation Manual

5.9 Replacing the AC Power Supply Unit, Fan and Filter Module

Removal 1. Disconnect the base station from AC main s power.

2. Remov e the fuse at th e rear of t he base station to dis connect the base station from DC power.

3. Disconnect the fan

4. Use a Torx T10 screwdriver to remove the two screws the AC powe r supply

5. Slide the AC po w er supply un it from it s position to gain access to the fan.

6. Use a PZ1 Posidriv screwdriver to remove the two M3 x 25mm screws

7. Disconnect the cable for the mains fail signal at J110 DC power cable at J102

8. Disconnect the connection (not shown) from the AC filter module

h that hold the fan in place, and remove the fan.

g at connector PL7 1! of the UI board.

f unit to the main chassis.

b of the SI board.

d to the AC power supply unit, and remove the AC power supply

unit.

9. Slide the AC filter module from its position and remove it.

Figure 5.7 Replacing the AC power supply unit, fan, filter module, and speaker

Cables not shown.

e that hold

c and the

Torx T10

4.5lb·in

1) i

PZ1

4.5lb·in

TB7100 Installation and Operation Manual Replacing Modules 61 © Tait Electronics Limited December 2005

Torx T10

4.5lb·in

dfe

Fitting

1. Slide the AC filter module d into the securing tabs at the r ear of t he tray.

2. Place the fan use a PZ1 screwdriv er to fasten the tw o M3×25 screws (0.5N·m).

3. Conne c t the AC power supply unit to the AC filter module.

4. Slide the AC po w er supply unit into position on the tray and connect the fan to connector PL7

5. Use a Torx T10 screwdriver to fasten the two scr ew s AC power supply unit in place to 4.5lb·in (0.5N·m).

6. Connect the cable for the mains fail signal at J110 power cable at J102

g into position on the AC power supply unit f and

5.10 Replacing the Speaker

The circled numbers in this section refer to the items in Figure 5.7 on

page 61.

h to 4.5lb·in

1! on the UI board.

e that hold the

c and the DC

b of the SI board.

1. Disconnect the speaker cable from connector PL2 UI board.

2. Use a Torx T10 screw driver to remove the two screws and washers

1) on the

i securing the speaker i to the tray.

3. Fitting is carried out in reverse order. The torque for the Torx T10 screws

i is 4.5lb·in (0.5N·m).

62 Replacing Modules TB7100 Installation and Operation Manual

5.11 Final Reassembly

Figure 5.8 shows the assembled configuration with internal AC power

supply unit. Figure 5.9 sho ws the assem bled configurat ion wit hout in ternal AC power supply unit.

1. Ensure all internal cables are connected correctly as shown below.

2. Place the tray cover onto the chassis.

3. Use a Torx T10 torque-driver to fasten the tray cover with the 15

countersunk screws to 4.5lb·in (0.5N·m).

4. Fit the fuse b at the rear of the base station.

Figure 5.8 Final reassembly (configuration with internal AC power supply unit)

Fuse

TB7100 Installation and Operation Manual Replacing Modules 63 © Tait Electronics Limited December 2005

Figure 5.9 Final reassembly (configuration without internal AC power supply unit)

Fuse

64 Replacing Modules TB7100 Installation and Operation Manual

6 Connections

Overview This section gives an overview of looms and cables, and describes the

specifications and pinouts of the external and internal connectors.

Figure 6.1 provid es an overview of the connections.

Figure 6.1 Connectors, looms and cables

Ground

Point

Transmitter

User interface connector

SK100

User interface connector

SK100

Fan Power Board

Module

Receiver

Module

PL5

PL6

RF connector

DC power connector

Auxiliary

connector

RF connector

DC power connector

Auxiliary

connector

PL4

PL3

SK103

SK101

PL100

SK103

SK101

PL100

Tx/Ant

Connector

Temperature

Sensor

DC power

Transmitter/SI

DC power

Receiver/SI

Fan power

Connector

Fuse

J103

J102

J201 J200

DC Input

Connector

J105

J110

System

Connector

J106 J104

J600

DC Output

SI Board

J101

Power Supply

Mains fail signal

PL101

Serial Data

Connector

Factory

only

Unit

115V/230V

Selector

Switch

AC power

J202

J100

AC Input

Connector

Module

AC Input Filter

FanFan

Receiver/UI

Transmitter/UI

SK1

SK3

Prog/Mic

Connector

UI Board

SK2

PL2PL7PL8

Speaker

Fan

Configuration with internal AC power supply unit shown

For information on the factory connector and the internal options connector of the transmitter and receiver, refer to the PCB inform ation.

TB7100 Installation and Operation Manual Connections 65 © Tait Electronics Limited December 2005

6.1 External Connectors

Figure 6.2 shows the external connectors:

Figure 6.2 External connect ors (configuration with internal AC Power supply unit shown)

programming/microphone

connector (PROG/MIC)

AC power connector

AC Power Connection

serial data

connector

(IOIOI)

system

connector

(SYSTEM)

DC power connector (13.8VDC 13A MAX)

receiver

antenna

connector

transmitter

antenna

connector

X/ANT)*

*Tx/ANT is Tx and Rx, i f t he du ple xer is fitt ed.

ground

point

If an internal AC power supply unit is fitted, AC power is available in 195V AC to 264VA C or 99VAC to 135VAC. The voltage selector switch is located under the base station cov er . (Refer to “Setting the AC Mai ns Input

Voltage” on page 50.)

The AC power connector at the rear of the base station is a standard 3-way AC pin connector.

Warning!! The internal AC power supply unit contains

voltages that ma y be lethal. Refer to the ratings label on the rear of the base st ation. The internal AC power supply contains no user-servicable parts.

Important Wrong mains v oltage! Before connecti ng to the A C po w er

connector, ensure that the internal 115V/230V voltage mains selector switch is set to the correct mains voltage.

The base station must be installed so that the rear of the base station is located in a service access area. The internal AC po w e r supply unit mus t be connected to the mains supply source by trained personnel in accordance with local and national regulations.

Ensure that all power sources (AC and

DC) are disconnected

before opening the base station.

66 Connections TB7100 Installation and Operation Manual

DC Power Connection

external view

The base station is designed to accept a nominal 13.8V DC, with negative ground.

The DC power connector (J105) at the rear of the base station is a heavyduty M4 screw terminal connector suitab le for many forms of connection.

Pin Signal Name Signal Type Notes

1 13.8VDC input

2 ground input

You must connect the DC supply from the battery to the base station via a readily accessible disconnect device such as a fuse or DC-rated circuit breaker with the appropriate rating, as shown in the table below. The DC input leads should be of a suitable gauge to ensure less than 0.2V drop at maximum load over the required length of lead.

Nominal Supply Voltage

13.8VDC 10VDC to 16VDC 20 A 8AWG / 8.35mm

a. For a length of 1.5m to 2m (5ft to 6.5ft) (typical).

Input Voltage Range

Circuit Breaker/Fuse Rating

Recommended Wire Gauge

Terminate the DC input leads with a suitable crimp connector for attaching to the J105 M4 screws.

Figure 6.3 Rec omm ende d DC power connectio n

Circuit Breaker

or Fuse

TB7100

base station

Battery

Ground Point The ground point is a terminal for grounding the tra y to the moun ting rack.

TB7100 Installation and Operation Manual Connections 67 © Tait Electronics Limited December 2005

RF Connections (R

X and TX/ANT)

rear view

The RF input to the base station is via the RX connector (N-type) on the rear panel of the base station. The RF output is via the T

X/ANT connector

(N-type) on the rear panel of the base station. The RF connector is an N-type connector with an impedance of 50Ω.

Important The maximum RF input level is +27 d Bm . Higher levels

may damage the radio.

Pin Signal Name Signal Type Notes

1 RF RF analog

2 GND RF ground

68 Connections TB7100 Installation and Operation Manual

System Connector (SYSTEM)

1) 2#

external view

The system connector (J106) at the re ar of the base station is a 25-way standard-density D-range socket.

Pin Signal Name Signal Type Notes

1 Rx line output + audio output transformer isolated line <6dBm 2 Tx/Rx digital input 1

(AUX_GPI1)

3 Tx/Rx digital input 2

(AUX_GPI2) 4 Rx line output – audio output transformer isolated line 5 Tx line input + audio input transformer isolated line 6 Tx/Rx digital input 3

(AUX_GPI3) 7 Tx/Rx digital input 4

(AUX_GPIO4)

8 Tx line input – audio input transformer isolated line 9 RSSI output DC signal, 0.6 to 2.5V 10 Tx digital in/out 1

(TX_AUX_GPIO5)

11 Tx audio input audio input 12 Tx digital in/out 2

(TX_AUX_GPIO6)

13 ground ground 14 Rx gate output open collector 15 Tx key input active low 16 Rx relay (comm) output 17 Rx relay (NO or NC) output 18 Rx Inhibit input 0 to 3.3V, active low 19 Rx digital in/out 1

(RX_AUX_GPIO5)

20 Tx Opto input + input input voltage range 10VDC to 21 Tx Opto input – input 22 Rx digital in/out 2

(RX_AUX_GPIO6)

23 Digital output/ Tx relay output active low, sinks up to 250mA 24 Rx audio output output <4.4V 25 13.8 volt output power output resetable SMD fuse 1.5A

input high ≥1.7 V, low ≤0.7 V

input output: high ≥3.1 V (no load),

low <0.6 V (10mA sink) input: high ≥1.7 V, low ≤0.7 V

input/output output: high ≥3.1 V (no load),

low <0.6 V (10mA sink) input: high ≥1.7 V, low ≤0.7 V

input/output output: high ≥3.1 V (no load),

low <0.6 V (10mA sink) input: high ≥1.7 V, low ≤0.7 V

opto-isolated

input/output output: high ≥3.1 V (no load),

low <0.6 V (10mA sink) input: high ≥1.7 V, low ≤0.7 V

60VDC

input/output output: high ≥3.1 V (no load),

low <0.6 V (10mA sink) input: high ≥1.7 V, low ≤0.7 V

Serial Data Connector (IOIOI)

external view

Programming/Micro phone Connector (PROG/MIC)

The serial data connector (J1054) labelled IOIOI is a 9-way female D-range connector, which provides a data connection to the base station.

Pin Signal Name Signal Type Notes

1 not connected not use d 2 receive data output data transmitted by TB7100 3 transmit data input data received by TB7100 4 not connected not use d 5 ground ground 6 not connected not use d 7 ready to transmit output request to send 8 clear to send input clear to send 9 not connected not use d

The PC running the programming and calibration application is connected to the base station via the programming/microphone connector (SK3) of the UI board. The programming/microphone connector is an 8-way RJ45 socket.

Use the TPA-SV-006 or the T2000-A19 programming lead and a TMAA20-04 adapter to connect the PC to the base station. It is possib le to plug the RJ11 directly into the RJ45 so ck et without the use of the ad apter , but this is not recommended. A microphone can also be connected to the base station via this connector.

12345678

external view

Pin Signal Name Signal Type Notes

1 not connected not connected 2 + 13V8_SW output +13.8V, 250mA 3 TXD input transmit data 4 PTT input PTT 5 MIC_AUD_IN input voice band (mic r op hon e) inp ut 6 GND ground 7 RXD output receive data 8 not connected not connected

70 Connections TB7100 Installation and Operation Manual

6.2 Internal Connectors

6.2.1 Transmitter and Receiver Connectors

The internal connectors of the transmitter and receiver are the same for both modules.

Note The signals on the user interface connectors are different for the

transmitter and the receiver.

RF Connectors The RF connectors of the transmitter and the receiver are N-type

connectors with an impedance of 50

Ω.

DC Power Connectors

50W/40W

external view

1 2 3 4

external view

25W

The DC power connectors of the transmitter and the receiver are the interface for the primary 13.8V power source. There are different DC power conn ectors for the 50W/40W and 25W versions.

Pin Signal name Signal type Notes

1AGND ground 2 SPK– analog output not connected 3 SPK+ analog output not connected 4 13.8VDC DC power input

Auxiliary Connectors

external view

User Interface Connector

The auxiliary connectors of the transmitter and receiver are 15-way standard-density D-range sock ets.

Pin Signal Name Signal Type Notes

1 AUX GPIO7 2 AUX GPIO4 3 AUX RXD input 4 AUX GPI3 5 AUX GPI2 6 RSSI output 7 AUX TAP IN input 8 13.8VDC SW output 9 AUX GPIO6 10 AUX GPIO4 11 AUX TXD output 12 AUX GPI1 13 AUD TA P OUT output 14 AUX MIC AUD input 15 AGND ground

The user interface connectors (SK100) of the transmitter and the recei v er is a 15-way moulded plastic connector.

9 7

external view

pin 1 closest to PCB

Pin Signal Name

1 RX AUD no connection no connection no connection 2 13.8VDC no connection output +13V8DC for UI board 3 CH TXD input input programming data 4 CH PTT input no connection microphone PTT 5 CH MIC AUD input output audio from micr oph one 6 AGND ground ground analog ground 7 CH RXD output output programming data 8 DGND ground ground digital ground 9 CH ON OFF output output digital ground 10 VOL WIP DC input input volume control 11 CH SPI D0 output output 12 CH LE output output 13 CH GPIO1 output output digital ground 14 3.3VDC no connection output +3V3DC for UI board 15 CH SPI D1 input input 16 CH SPI CLK output output 17 SPK- no connection output speaker audio 18 SPK+ no connection output speaker audio

Signal Type

Notes

Transmitter Receiver

72 Connections TB7100 Installation and Operation Manual

6.2.2 SI Board Connectors

DC Power Connectors

external view

System Interface Connector to Transmitter

1615

external view

The two DC p ower connectors (J102 and J103) on the SI boar d are heavyduty M4 screw terminals. J102 (if fitted) accepts pow er from the internal AC pow er supply unit. J103 dis tributes the DC pow er to the transmitter and the receiver.

Pin Signal Name Signal Type Notes

1 Tx and Rx 13.8VDC J102 :input

J103: output

2 Tx and Rx ground J102 :input

J103: output

The system interface connector (J101) to the transmitter is a 16-w ay surfacemounted connector.

Pin Signal Name Signal Type Notes

1 TX_AUX_GPIO7 output Tx key signal 2 TX_AUX_GPIO6 bidirectional digital input/output 3 TX_AUX_GPIO5 bidirectional digital input/output 4 TX_AUX_GPIO4 bidirectional digital input/output 5 TX_AUX_RXD input data 6 TX_AUX_TXD output data 7 TX_AUX_GPI3 input digital input 8 TX_AUX_GPI1 input digital input 9 TX_AUX_GPI2 input digital input 10 TX_AUD_TAP_OUT no connection 11 TX_RSSI no connection 12 TX_MIC_AUD output 13 TX_AUD_TAP_IN output Tx audio 14 TX_GND ground ground 15 TX_13V8 no connection 16 N/C no connection

System Interface Connector to Receiver

1615

external view

The system interface connector (J100) to the receiver is a 16-way surfacemounted connector.

Pin Signal Name Signal Type Notes

1 RX_AUX_GPIO7 input gate signal 2 RX_AUX_GPIO6 bidirectional digital input/output 3 RX_AUX_GPIO5 bidirectional digital input/output 4 RX_AUX_GPIO4 bidirectional digital input/output 5 RX_AUX_RXD input data 6 RX_AUX_TXD output data 7 RX_AUX_GPI3 input digital input 8 RX_AUX_GPI1 input digital input 9 RX_AUX_GPI2 input digital input 10 RX_AUD_TAP_OUT input receive audio 11 RX_RSSI input RSSI 12 RX_MIC_AUD no connection 13 RX_AUD_TAP_IN no connection 14 RX_GND ground ground 15 RX_13V8 no connection 16 N/C no connection

74 Connections TB7100 Installation and Operation Manual

6.2.3 UI Board Connectors

User Interface Connector to Transmitter

external view

The user interface connector (SK1) to the transmitter is a 16-way MicroMaTch connector.

Pin Signal Name Signal Type Notes

1 TX_RX_AUD no connection no connection

2 TX_+13V8_SW no connection no connection 3 TX_CH_TXD output programming data 4 TX_CH_PTT output microphone PTT 5 TX_MIC_AUD_OUT output audio from microphone 6 TX_AGND ground analogue ground 7 TX_CH_RXD input programming data 8 TX_DGND ground digital ground 9 TX_CH_ON_OFF input digital ground 10 TX_VOL_WIP_DC output no connection 11 TX_CH_SPI_D0 input 12 TX_CH_LE input 13 TX_CH_SPIO1 input digital ground 14 TX_+3V3 no connection no connection 15 TX_CH_SPI_DI output 16 TX_CH_SPI_CLK input 17 TX_CH_SPK- no connection no connection 18 TX_CH_SPK+ no connection no connection

User Interface Connector to Receiver

external view

The user interface connector (SK2) to the receiver is a 16-w ay MicroMaTch connector.

Pin Signal Name Signal Type Notes

1 RX_RX_AUD no connection no connection

2 RX_+13V8_SW input +13V8DC for PCB 3 RX_CH_TXD output programming data 4 RX_CH_PTT no connection no connection 5 RX_MIC_AUD_OUT input no connection 6 RX_AGND ground analogue ground 7 RX_CH_RXD input programming data 8 RX_DGND ground digital ground 9 RX_CH_ON_OFF input dig ital ground 10 RX_VOL_WIP_DC output volume control 11 RX_CH_SPI_D0 input 12 RX_CH_LE input 13 RX_CH_GPIO1 input digital ground 14 RX_+3V3 input +3V3DC for PCB 15 RX_CH_SPI_DI output 16 RX_CH_SPI_CLK input 17 RX_CH_SPK- input speaker au dio 18 RX_CH_SPK+ input spea k er audio

76 Connections TB7100 Installation and Operation Manual

7 Preparation for Operation

7.1 Introduction

The base station operation can be modified by the use of links and programmable settings.

The base station can be configured for operation in the following basic modes of ope r at ion:

■ Line-contr oll ed b ase: Th e bas e st at ion tra nsmit audio and key is deriv e d

via the system interface. Audio response is link-selectable.

■ Talk through repeater (voice): The receiver audio is directly connected

to the transmitter and the transmitter is keyed by the receiver gate. Audio response in this mode is software-selectable.

■ Data repeater: The received data line is connected to the transmit data

line. receiver gate and transmitter k ey signals are not used.

■ RF modem: Data on the serial interface is connected to the transmitter

and the receiver.

■ Tait Net tru n king.

7.2 Mode of Operation

This section show s how to set up the base station for various modes of operation.

Examples are:

■ line-contr olled base

■ talk through repeater

■ RF modem

■ data repeater

■ Tait Net tru n king.

Where applicable , the pr ocedur e for setting an y of the audi o levels or other adjustment points will be described, along with the procedure for measuring a variety of parameters commonly monitored.

To verify the operation of the base station it is best to configure it as a linecontrolled base first. In this mode of operation the receiver and transmitter modules can be independently tested because all the audio inputs and outputs are accessible via the system interface connector. When the base station has been tested as a line-controlled base, it is then a simple process to change the links to the re quired mode of operation and perform any additional functional testing required for that mode of operation.

7.3 Line-controlled Base

In the line-controlled base mode the audio and control signals are routed from the external 25-way D-range connector t hrough the system interface to the receiver and transmitter modules. External equipment is used to control the operation of the base station.

Figure 7.1 Line-controlled base

RF In RF Out

Receiver Transmitter

7.3.1 Test Equipment Required

The following test equipment is used to setup the base station for linecontrolled base operation:

■ TBA0STU calibratio n test unit (CTU) which includes the CTU adaptor

and CTU cable, or

■ TBA0ST1 calibration test unit (CTU), TBB0STU-TBB CTU adaptor

(220-02068-xx) and CTU cable (219-02888-xx)

■ PC, prog ramming cables and the TB7100 programming application

■ digital voltmeter

■ DC power supply (not necessary with internal AC power supply unit

option)

Rx Gate

Rx Audio

System Interface

Tx Key

Tx Audio

■ RF test set with:

■ RF power meter

■ modulation analyser

■ RF signal generator

■ sinad meter

■ audio distortion meter

78 Preparation for Operation TB7100 Installation and Operation Manual

■ audio level meter

■ audio signal generator .

Calibration T est Unit (CTU)

The CTU is used to configure and test the base station. The same CTU is used for TB8000 and TB9000 base station equi pment, so only some of the features on the CTU apply to the TB7100 base station. The CTU adaptor is plugged into the system connector of the CTU. The CTU cable is plugged into the system connector of the base station.

For more information on the CTU refer to the TBA0STU/TBA0STP Calibration and Test Unit Operation Manual (MBA-00013-xx).

7.3.2 Test Equipment Setup

1. Connect the PC to the programming port on the front panel of the base station. S e e “Connecting to the PC” on page 105.

2. Plug the adaptor into the system connector on the CTU . Connect the adaptor cable to the system connector of the base station.

Note Connections betw een the CTU and t he t est equipment will vary

and are described in the relevant test steps.

3. Ensure all switches on the CTU are in the 1 or OFF position (inactive).

4. Connect the receiver N-type connector to the RF test set (signal generator) output port.

5. Connect the transmitter N-typ e connector to the RF test set (power and modulation meter) input port, check the test set is rated for the transmit power of the base station.

6. Connect the 13.8V power supply to the DC input on the base station, ensuring correct polarity.

7.3.3 Link Settings

Remov e the co v er as detailed in “Removing the Bas e Station and Opening

the Tray” on page 54 and set the following links on the SI board.

Links of the mandatory settings must be in the position indicated. Links of the optional settings m ust b e in one of the po siti ons list ed. Th e defaults ar e generally recommended.

Replace the cover as detailed in “Final Reassembly” on page 63.

Table 7.1 Line-controlled base—mand atory settin gs

LINK Name Pins Position Function Comments

J400 Tx Key

Source

J502 Tx Audio

Source

J503 Rx Audio

Destination

W401 W402

Table 7.2 Line-controlled base—optiona l settings

J500 Line Out

J501 Line In

J507 Line In

TOI 9V Enable TOI 4.5V Enable22

LINK Name Pins Position Function Comments

Frequency Response

Destination

3 1-2 Line-controlled Base mode External PTT signal to transmitter

3 1-2 Line-controlled Base mode Balanced and unbalanced audio

inputs to transmitter

3 2-3 Line-controlled Base mode Received audio to balanced and

unbalanced audio outputs

Not fitted

31-2

2-3

31-2

2-3

31-2

2-3

Tone on Idle disable Refer “Tone On Idle (TOI)” on

page 118 to enable idle tone.

Flat response De-emphasis

Tx Line In to Aux Mic Tx Line In to Audio Tap In

Default position is 2-3

Default position is 2-3. Position 1-2 is usually used only by trunking systems.

J206 Fan Control 1 3 1-2

2-3

J207 Fan Control 2 3 1-2

2-3

80 Preparation for Operation TB7100 Installation and Operation Manual

Fan controlled by J207 Fan always on

Fan Tx key-controlled Fan temperature-controlled

Default position is 1-2

Default position is 2-3

Figure 7.2 System interface link positions

J207 W401

W402

J206 J507 J501

7.3.4 Applying Power

Before turning on the base station, check that:

■ all looms and cables at the front and rear of the base station are fitted

correctly

■ all connectors are secure

■ the 20A fuse is fitted.

Turn on the power supply and check that the base station powers up correctly:

■ The power LE D on the user interface lights up.

■ The LCD indicates the current channel number.

J400J500 J502J503

7.3.5 Programming

To program a base station for line-controlled base operation follow the instructions below. Do not add CTCSS or any additional settings at this stage. These are covered in “Programmable Features” on page 105. See

“Connecting to the PC” on page 105 before beginning.

Transmitter 1. Place the transmit/receive programming switch on the user interface

into the tr ansmit posit ion.

2. Read the transmitter or start with a new transmit ter data file.

3. Use the reset to defaults command under the file menu to ensure all the mandatory and recommended settings are in their correct default states.

4. Open the specifications form and select the correct RF band, not required if the transmit ter file was read.

5. Open the channels for m and add as many channels as are required. For each channel enter the:

■ transmit frequency

■ Tx subaudible signalling value (leave as “None”)

■ power level

■ bandwidth.

6. Open the key settin gs form and select the required fu nction for each function key. For example:

■ FN1 = Preset Channel

■ FN2 = Preset Channel

■ FN3 = Preset Channel

■ FN4 = None

7. Program the transmitter.

Receiver 1. Place the transmit/receiv e p r ogramming switch on the user interface

into the receive position.

2. Read the receiver or start with a new receiver data file.

3. Use the reset to defaults command under the file menu to ensure all the mandatory and recommended settings are in their correct default states.

4. Open the specifications form and select the correct RF band, not required if the r eceiver file w as read.

5. Open the channels for m and add as many channels as are required. For each channel enter:

82 Preparation for Operation TB7100 Installation and Operation Manual

■ receive frequency

■ Rx subaudible signalling value (leave as “None”)

■ squelch setting

■ bandwidth.

6. Open the key s ettings form and select the required fun ction for each

function key. For example:

■ FN1 = Preset Channel (same as transmitter)

■ FN2 = Preset Channel (same as transmitter)

■ FN3 = Preset Channel (same as transmitter)

■ FN4 = Monitor / Squelch override

7. Program the receiver.

7.3.6 Receiver Audio Level Adjustment

Unbalanced Line 1. Connect the unbalanced output from the CTU to the audio input

port on the test set and set up the test set to measure the audio level.

2. Set the RF signal generator to the correct RF frequency, modulated

with a 1kHz audio tone at 60% of full system deviation.

3. Set the RF output level to -70dBm.

4. Verify that the receiver gate opens and the busy LED turns on.

5. Adjust RV502 (UNBAL OUT) on the rear panel to set the

unbalanced output to the required level (t ypically 1Vp-p).

Balanced Line 1. Connect the line output from the CTU to the audio input port on

the test set and set up the test set to measure the audio le vel.

2. Turn the CTU 600 ohm switch on.

3. Set the RF signal gen e rator to the co rrect RF freq uency modulated

with a 1kHz audio tone at 60% of full system deviation.

4. Set the RF output level to -70dBm.

5. Verify that the receiver gate opens and the busy LED turns on.

6. Adjust RV503 (BAL OUT) on the rear panel to set the balanced

output to the requir ed level (typically -10dBm).

7.3.7 Receiver Functional Testing

This section describes how to test some parameters which are commonly monitored.

Sensitivity The sensitivit y can be measured using either the balanced or unbalanced

audio output.

1. Connect the requir ed audio output fr om the CTU to the aud io input port on the test set.

2. Connect the RF output fr om the test set to the Rx input o n the r ear panel.

3. Set up the test set to measure the SINAD level.

4. Set the RF signal genera tor to the correct RF frequency, modulated with a 1kHz audio tone at 60% of full system de viation.

5. Set the RF output level to -70dBm.

6. Verify that the receiver gate opens and the busy LED turns on.

7. Reduce the RF leve l until 12dB SINAD is obtained.

Note This level will vary depending on the bandwidth and frequency

response of the channel. Consult the specifications manual for v alues.

Note If the mute closes before 12dB SINAD is reached then squelch

override may be programmed to a function key. Pressing this key will prevent the mute from closing.

RSSI Level 1. Connect a voltmete r to the RSSI test point on the CTU.

2. Set the RF signal generator to the correct RF frequency.

3. Set the RF level to -100dBm .

4. Verify the RSSI voltage is 1.1V

±300mV.

Note If necessary adjust the RF level from –50dBm to –115dBm and

verify that the RSSI voltage changes at 25mV/dB.

Mute Thresholds The mute thresholds can be measured using either the balanced or

unbalanced output.

1. Connect the requir ed audio output fr om the CTU to the aud io input port on the test set.

2. Set up the test set to measure the SINAD level.

84 Preparation for Operation TB7100 Installation and Operation Manual

3. Set the RF signal generator to the correct RF frequency, modulated

with a 1kHz audio tone at 60% of full system deviation.

4. Set the RF output level to –70dBm.

5. Verify that the receiver gate opens and the busy LED turns on.

6. Reduce the RF lev el until t he mute closes. This RF le v el is the m ute

close threshold.

7. Increase the RF lev el until the m ute opens. This RF lev el is the mu te

open threshold.

8. The difference between these two levels is the mute hysteresis. Note The mute thresholds are determined by the squelch setting pro-

grammed in the receiver’s channel table.

Note If the thresholds ar e not suitab le use the calibration application to

change the squelch setting on the channel table.

Distortion The Rx Distortion can be measured using either t he balanced or unbalanced

output. Note Before beginning this test verify the test set is rated to handle the

transmit power being tested.

1. Connect the r equired audio output fr om the CTU to the audi o input

port on the test set.

2. Set up the te s t set to measure th e di s tortion level.

3. Set the RF signal generator to the correct RF frequency, modulated

with a 1kHz audio tone at 60% of full system deviation.

4. Set the RF output level to –70dBm.

5. The measured distortion level should be within the receiver

specifications as detailed in the specifications manual.

7.3.8 Transmitter Audio Level Adjustment

Balanced Line 1. Set up the test se t to measure the transmitter modulati on l evel.

2. Connect the CTU line input to the audio out put port on the test set.

3. Set up the test set audio outpu t to be 1kHz at the required line le vel

(typically –10dBm).

4. Activate the Tx Key switch and verify that the transmission is at the

programmed power and frequency.

5. Adjust RV500 (BAL IN) on the rear panel to the required deviation (typically 60% of full system deviation).

Unbalanced Line 1. Set up the test set to measure the transmitter modula tion level.

2. Connect the CTU unbalanced input to th e audio output port on the test set.

3. Set up the test set audio output to be 1kHz at the required line level (typically 1Vp-p).

4. Activat e the Tx Key switch an d verify that the transmission is at the programmed po wer level and frequency.

5. Adjust RV501 (UNBAL IN) on the rear panel to the required deviation (typically 60% of full system deviatio n).

7.3.9 Transmitter Functional Testing

This section describes how t o test some parameters commonly found on RF channel test sheets.

Tx Power and Frequency

1. Set up the test set to measure frequency and power leve l.

2. Activate the Tx Key switch on the CTU.

3. Verify that the measured power level and frequency match the programmed settings, within the expected accuracy of the test set and taking into account cable losses.

Note If the measured value does not agree with the programmed set-

tings, the transmitter module is either faulty or needs r ecalibrating.

Audio Distortion When measuring the transmitter audio distortion, the audio input signal can

be via either the balanced or unbalanced audio input.

1. Connect the audio output from the test set to the required CTU audio input.

2. Set up the modulation analyser in the test set to measure the distortion of the modulated audio signal.

3. Set up the test set audio generator ou tput to be 1kHz an d at the level required to produce 60% full system deviation (this is the same level used in the audio level adjustment section).

4. Activate the Tx K e y s witch and verify that the measured deviation is 60% of full system deviation.

5. The measured distortion level should be within the transmitter specifications as detailed in the specifications manual.

86 Preparation for Operation TB7100 Installation and Operation Manual

Note If the measured value does not agree with the pro grammed set-

tings, the transmitter module is either faulty or needs r ecalibrating.

Maximum Deviation

When measuring the maximum deviation, th e audio input signal can be via either the balanced or unbalanced audio input.

If CTCSS is to be added, this should be done before carrying out this test. Refer to “Enabling Subaudible Signalling” on page 115 for instructions.

1. Set up the te st set to measure the deviatio n of the RF signal.

2. Connect the audio output from the test set to the requir ed CTU

audio input.

3. Set up the te s t set audio gen e rator outpu t to be 1kHz and a t the

required level to produce 60% full system deviation (this is the level used in the audio level adjustment section).

4. Activ ate the Tx K ey s witch and verify that the measured deviation is

60% of full system deviation.

5. Increase the test set audio generator output level by 20dB and sweep

the audio frequency from 100Hz to 4kHz.

6. The maximum measured deviation level should not exceed the full

system deviation programmed for the channel.

Note If the measured value exceeds the pr o grammed settings, the trans-

mitter module is either faulty or needs recalibrating.

7.4 Talk Through Repeater

Once the base station has been set up and tested as a line-controlled base, it is simple to convert it into a talk through repeater. In this mode of operation the received audio and receiver gate from the receiver module are looped back to the transmitter .

Figure 7.3 Talk through repeater

RF In

7.4.1 Test Equipment Required

The following test equipment is used to setup the base station for talk through re peater operation:

■ PC, prog ramming cables and the TB7100 programming application

■ digital voltmeter

Receiver Transmitter

Rx Gate

Rx Audio

System Interface

Tx Key

RF Out

Tx Audio

■ DC power supply

■ RF test set with:

■ RF power meter

■ modulation analyser

■ RF signal generator

■ sinad meter

■ audio distortion meter

■ audio level meter

■ audio signal generator.

88 Preparation for Operation TB7100 Installation and Operation Manual

7.4.2 Test Equipment Setup

1. Connect the PC to the programming port on the front panel of the

base station. S e e “Connecting to the PC” on page 105.

2. Connect the receiver N-type connector to the RF test set (signal

generator) output port.

3. Connect the transmitter N-typ e connector to the RF test set (power

and modulation meter) input port, check the test set is rated for the transmit power of the base station.

4. Connect the 13.8V power supply to the DC input on the base station,

ensuring correct polarity.

7.4.3 Link Settings

Remov e the co v er as detailed in “Removing the Base S tation and Opening

the Tray” on page 54 and set the following links on the SI board.

Links of the mandatory settings must be in the position indicated. Links of the optional settings must be in one of the positions listed. The defaults are generally recommended.

Replace the cover as detailed in “Final Reassembly” on page 63.

Table 7.3 Talk through repeater—mandatory settings

LINK Name Pins Position Function Comments

J400 Tx Key

Source

J502 Tx Audio

Source

J503 Rx Audio

Destination

W401 W402

Table 7.4 Talk through repeater—optional settings

TOI 9V Enable TOI 4.5V Enable22

LINK Name Pins Position Function Comments

3 2-3 Talk Through Repeater

mode

3 2-3 Talk Through Repeater

mode

3 1-2 Talk Through Repeater

mode

Not fitted

Tone on Idle disable Tone on idle not used in repeater

Receiver gate keys transmitter

Transmitter audio taken from the receiver

Received audio to the transmitter

configuration

J507 Line In

Destination

J206 Fan Control 1 3 1-2

J207 Fan Control 2 3 1-2

31-2

2-3

Tx Line In to Aux Mic Tx Line In to Audio Tap In

Fan controlled by J207 Fan always on

Fan Tx key-controlled Fan temperature- controlled

Default position is 2-3

Default position is 1-2

Default position is 2-3

Note By default the audio frequency response will be flat.

Figure 7.4 System interface link positions

7.4.4 Applying Power

Before turning on the base station, check that:

■ all looms and cables at the front and rear of the base station are fitted

correctly

■ all connectors are secure

■ the 20A fuse is fitted.

Tur n on the power supply and check that the base station powers up correctly:

■ The power LED on the user interface lights up.

■ The LCD indicates the current channel number.

7.4.5 Programming

No changes to the values programmed for line-contr olled base operation are required. See “Programming” on page 82 for details.

J400J500 J502J503 J501

Note If a soft tail setting is required see later in this chapter “Soft Off

(Tx Tail Time)” on page 118.

90 Preparation for Operation TB7100 Installation and Operation Manual

7.4.6 Audio Level Adjustment

There is no audio lev el adjustment necessary in repeater mode. The internal linking is designed to produce a repeater with no talk through gain. If talk through gain is requ ired it can be implemented by linking back the audio using a DB25 connector on the system interface and setting the audio levels as required, see “Alternate Talk Through Repeater Configuration” on

page 92 for a more detailed explanation.

7.4.7 Talk Through Repeater Functional Testing

The basic operation of the base station has already been tested as a linecontrolled base. This section describes the additional functional tests required to verify that the base station is operating correctly as a repeater.

Repeater Key With the test set in duplex mode:

1. Set up the test set to measure the transmitter power and frequency

output.

2. Set the RF signal generator to the correct frequency for the receiver. Note If subaudible signalling has been a dd ed, al so modulate th e carrier

with the required signal.

3. Set the RF level to -70dBm.

4. The receiver busy LED turns on and the transmitter keys up and

transmits at the programmed power level and frequency. When the RF source is removed, the transmitter will stop transmitting.

Talk Through With the test set in duplex mode:

1. Set up the te st set to measure the modulation level and frequenc y.

2. Set the RF signal generator to the correct fr equency for the r e ceiver.

3. Modulate the RF carrier with a 1kHz audio tone at 60% full system

deviation.

Note If subaudible signalling has been a dd ed, al so modulate th e carrier

with the required signal.

4. Set the RF level to –70dBm.

5. The receiver busy LED turns on and the transmitter keys up and

transmits at the programmed power level and frequency. The transmitted signal will be the same as received. If subaudible signalling has been enabled, the required sub-tone will also be transmitted.

6. Ensure the deviation is at the desired level.

7.4.8 Alternate Talk Through Repeater Configuration

Audio Frequency Response

Repeater Talk Through Gain

When a talk through repeater is cr eated by linking the audio path using links J502 and J503, the default frequency response is flat audio. The pre/deemphasis links J500 and J501 are not in the audio path and have no effect.

When a talk through repeater is cr eated by linking the audio path using links J502 and J503, the repeater will have no talk through gain. If talk through gain is required internally link the base station for line-controlled base operation. Then externally configure it to operate as a repeater by linking the following pins on a 25pin male D-range connector and plugging the connector into the system connector on the rear panel of the base station.

Pins Function

1 to 5 Rx Line Out+ to Tx Line In+ 4 to 8 Rx Line Out- to Tx Line In14 to 15 Rx Gate to Tx Key

When configured as described above:

■ The base station will operate as a repeater.

■ The Talk through gain can be set by adjust ing the line output level and

line input sensitivity RV500 (BAL IN) and RV503 (BAL OUT) on the rear panel.

■ The pre/de emphasis links J500 and J501 can be used to set the audio

frequency respon s e.

92 Preparation for Operation TB7100 Installation and Operation Manual

7.5 RF Modem

In RF modem mode the transmitter and receiver are connected to the serial interface and any data on the serial interface is transmitted. Any data received is forwarded to the PC.

Figure 7.5 RF modem

RF In

7.5.1 Test Equipment Required

The following test equipm ent is used to setup the base station for RF modem operation:

Receiver Transmitter

Rx Data

Serial Interface

RF Out

Tx Data

■ TBA0STU calibration test u nit (CTU) which includes the CTU adaptor

and CTU cable, or

■ TBA0ST1 calibration test unit (CTU), TBB0STU-TBB CTU adaptor

(220-02068-xx) and CTU cable (219-02888-xx)

■ PC, programming cables and the TB7100 programming application

■ digital voltmeter

■ DC power supply

■ RF test set with:

■ RF power meter

■ modulation analyser

■ RF signal generator

■ sinad meter

■ audio distortion meter

■ audio level meter

■ audio signal generator

Calibration T est Unit (CTU)

The CTU is used to configure and test the base station. The same CTU is used for TB8000 and TB9000 base station equipment, so only some o f the features on the CTU apply to the TB7100 base station. The CTU adaptor is plugged into the system connector of the CTU. The CTU cable is plugged into the system connector of the base station.

For more information on the CTU refer to the TBA0STU/TBA0STP Calibration and Test Unit Operation Manual (MBA-00013-xx).

7.5.2 Test Equipment Setup

1. Connect the PC to the programming port on the front panel of the base station. See “Connecting to the PC” on page 105.

2. Connect the receiver N-type connector to the RF test set (signal generator) output port.

3. Connect the transmitter N-type connector to th e RF test set (power and modulation meter) input port, check the test set is rated for the transmit power of the base stat i o n.

4. Connect the 13.8V power supply to the DC input on the base station, ensuring correct polarity.

7.5.3 Link Settings

Remov e the co v er as detailed in “Removing the Bas e Station and Opening

the Tray” on page 54 and set the following links on the SI board.

Links of the mandatory settings must be in the position indicated. Links of the optional settings m ust b e in one of the po siti ons list ed. Th e defaults ar e generally recommended.

Replace the cover as detailed in “Final Reassembly” on page 63.

Table 7.5 RF modem—mandatory settings

LINK Name Pins Position Function Comments

J221 RS232 Loop

Back

J400 Tx Key

Source

3 1-2 RS-232 out data connector

3 1-2 External Tx key source Use this setting because the

transmitter will automatically key up when there is data to send so should not be keyed by the receiver gate.

94 Preparation for Operation TB7100 Installation and Operation Manual

Table 7.6 RF modem—optional settings

LINK Name Pins Position Function Comments

J206 Fan Control 1 3 1-2

2-3

Fan controlled by J207 Fan always on

Default position is 1-2

J207 Fan Control 2 3 2-3 Fan temperature-controlled Do not use position 1-2 (Tx key-

activated fan). The transmitter will automatically key up when there is data to send. This will not activate the Tx key line and therefore will not activat e the fan .

Figure 7.6 System interface link positions

J221

7.5.4 Applying Power

Before turning on the base station, check that:

■ all looms and cables at the front and rear of the base station are fitted

correctly

■ all connectors are secure

■ the 20A fuse is fitted.

Turn on the power supply and check that the base station powers up correctly:

■ The power LE D on the user interface lights up.

■ The LCD indicates the current channel number.

7.5.5 Programming

Please see the line-controlled base “ Programming” on page 82 for details on how to program the base station for RF modem operation.

7.5.6 Audio Level Adjustment

In this configuration the system interface connector is not used, so it is not necessary to set the line output level or line input sensitivity.

7.5.7 Programming for FFSK Operation

To program a base station for FFSK operation:

Transmitter 1. Read the transmitter or start with a new transmitter data file.

2. Use the reset to defaults command under the file menu to ensure all the mandatory and recommended settings are in their correct default states.

3. Open the specifications form and select the correct RF band

4. Open the channels form summary tab. Add as many channels as are required and for each channel enter the following:

■ transmit frequency

■ Tx subaudible signalling value

■ power level

■ bandwidth.

5. Open the channels form details tab and for each channel check the Use channel for data check box.

6. Open the key settin gs form and select the required fu nction for each function key. For example:

■ FN1 = Preset Channel

■ FN2 = Preset Channel

■ FN3 = Preset Channel

■ FN4 = None.

7. Open the data form and in the general tab:

■ In the command mode section disable all check boxes.

■ In the transparent mode section select transparent mode enabled

and de-select the other check boxes.

■ Set Power Up State to FFSK transparent mode.

8. Open the data form and in the serial communications tab:

■ In the serial communications setup field set the FFSK transpar ent

96 Preparation for Operation TB7100 Installation and Operation Manual

mode baud rate to 1200, the Flow control to None and the data port to the required data port.

■ Ensure hardware flow control is set to None.

9. Open the data form RF modems tab. The THSD modem set tings do

not apply and can be ignor ed. In the FFSK modem s ection set up the following:

■ Ignore CTCSS/DCS can be disabled (CTCSS/DCS is not used

in this example).

■ Enable Check Packet Length.

■ Disable FFSK Tone Blanking.

■ FFSK Lead-In Delay default of 500ms is suitable but can be

changed.

■ FFSK Lead-Out Delay default of 200ms is suitable but can be

changed.

10. Program the transmitter

Receiver 1. Read the receiver or start with a new receiver data file.

2. Use the reset to defaults command under the file menu to ensu re all

the mandatory and recommended settings are in their correct default states.

3. Open the specifications form and select the correct RF band.

4. Open the channels form summary tab. Add as many channels as are

required and for each channel enter the followi ng:

■ receive frequency

■ Rx subaudible signalling value

■ squelch setting

■ bandwidth.

5. Open the channels form details tab and for each channel check the

use channel for data check box.

6. Open the key s ettings form and select the required fun ction for each

function key. For example:

■ FN1 = Preset Channel (same as transmitter)

■ FN2 = Preset Channel (same as transmitter)

■ FN3 = Preset Channel (same as transmitter)

■ FN4 = Monitor / Squelch override

7. Open the data form and in the general tab:

■ In the command mode section disable all check boxes.

■ In the transparent mode section select transparent mode enabled

and de-select the other check boxes.

■ Set Power Up State to FFSK transparent mode.

8. Open the data form and in the serial communications tab:

■ In the serial communications setup field set the FFSK transpar ent

mode baud rate to 1200, the Flow control to None and the data port to the required data port.

■ Ensure hardware flow control is set to None.

9. Open the data form RF modems tab. The THSD modem settings do not apply and can be ignored. In the FFSK modem s ection set up the following:

■ Ignore CTCSS/DCS can be disabled (CTCSS/DCS is not used

in this example).

■ Enable Check Packet Length.

■ Disable FFSK Tone Blanking.

■ FFSK Lead-In Delay default of 500ms is suitable but can be

changed.

■ FFSK Lead-Out Delay default of 200ms is suitable but can be

changed.

10. Program the receiver.

7.5.8 Programming for THSD Operation

Transmitter 1. Read the transmitter or start with a new transmitter data file .

2. Use the reset to defaults command under the file menu to ensure all the mandatory and recommended settings are in their correct default states.

3. Open the specifications form and select the correct RF band.

4. Open the channels form summary tab. Add as many channels as are required and for each channel enter the following:

■ transmit frequency

■ Tx subaudible signalling value = Ignored in THSD Mode

■ power level

■ bandwidth.

5. Open the channels form details tab and for each channel check the use channel for data check box.

6. Open the key settin gs form and select the required fu nction for each function key. For example:

■ FN1 = Preset Channel

■ FN2 = Preset Channel

■ FN3 = Preset Channel

■ FN4 = None

98 Preparation for Operation TB7100 Installation and Operation Manual

7. Open the data form and in the general tab:

■ In the command mode section disable all check boxes.

■ In the transparent mode section select transparent mode enabled

and THSD modem enabled and de-select the ignore escape sequence check box.

■ Set Power Up State to THSD transparent mode.

8. Open the data form and in the serial communications tab:

■ In the serial communications setup field set the THSD tra nsparent

mode baud rate to 9600, the Flow control to None and the data port to the required data port.

■ Ensure hardware flow control is set to None.

9. Open the data form RF modems tab. The FFSK modem s ettings do

not apply and can be ignored. In the THSD mode m section set up the following:

■ Wide band modem enabled

■ Layer 2 Pro tocol enabled

■ Forward Error Correct i on di s a ble d

■ THSD Lead-in Delay default of 30ms is acceptable.

10. Program the transmitter.

Receiver 1. Read the receiver or start with a new receiver data file.

2. Use the reset to defaults command under the file menu to ensu re all

the mandatory and recommended settings are in their correct default states.

3. Open the specifications form and select the correct RF band.

4. Open the channels form summary tab. Add as many channels as are

required and for each channel enter the followi ng:

■ receive frequency

■ Rx subaudible signalling value = Ignored in THSD Mode

■ squelch setting

■ bandwidth.

5. Open the channels form details tab and for each channel check the

use channel for data check box.

6. Open the key s ettings form and select the required fun ction for each

function key. For example:

■ FN1 = Preset Channel (same as transmitter)

■ FN2 = Preset Channel (same as transmitter)

■ FN3 = Preset Channel (same as transmitter)

■ FN4 = Monitor / Squelch override.

7. Open the data form and in the general tab:

■ In the command mode section disable all check boxes.

■ In the transparent mode section select transparent mode enabled

and THSD modem enabled and de-select the ignore escape sequence check box.

■ Set Power Up State to THSD transparent mode.

8. Open the data form and in the serial communications tab:

■ In the serial communications setup field set the THSD transpar ent

mode baud rate to 9600, the Flow control to None and the data port to the required data port.

■ Ensure hardware flow control is set to None.

9. Open the data form RF modems tab . The FFSK mo dem settin gs d o not apply and can be ignored. In the THSD modem section set up the following:

■ Wide band modem enabled

■ Layer 2 Protocol enabled

10. Program the receiver.

7.5.9 Verification

In order to verify the correct operation as an RF modem a basic functional test can be carried out by sending data betw een the TB7100 base station and a TM8000 mobile radio.

The following equipment will be required:

■ DC power supply

■ antenna for receiver input

■ dummy load for transmitter output

■ a PC running the terminal application connected to the serial data port

■ a second PC running the terminal application connected to a TM8000

■ Forward Error Correction disabled

■ THSD Lead-In Delay default of 30ms is acceptable.

on the base station with a 9-pin serial cable

mobile radio which has been programmed to send and receive the required data modu lation (FFSK or THSD).

The test setup is shown in “RF modem test setup” on page 101.

100 Preparation for Operation TB7100 Installation and Operation Manual

Tait TB7100 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Tait Contact Information

Contents

Preface

Scope of Manual

Enquiries and Comments

Updates of Manual and Equipment

Copyright

Disclaimer

Document Conventions

Associated Documentation

Publication Record

1Introduction

1.1 Frequency Bands

1.2 RF Output Power

1.3 Power Supply Options

1.4 Mechanical Configurations

1.5 Product Codes

2 Mechanical Description

2.1 Tray

2.2 UI Board

2.3 Receiver Module

2.4 Transmitter Module

2.5 SI Board

2.6 AC Power Supply Unit

3 Functional Description

3.1 Receiver Operation

3.1.1 RF Hardware

3.1.2 Digital Baseband Processing

3.1.3 Audio Processing and Signalling

3.2 Transmitter Operation

3.2.1 Audio Processing and Signalling

3.2.2 Frequency Synthesizer

3.2.3 RF Power A mplifier

3.3 User Interface Operation

3.4 System Interface Operation

3.4.1 Internal Power Distribution

3.4.2 Serial Data

3.4.3 General Purpose IO

3.4.4 Receiver Audio Processing

3.4.5 Tone On Idle

3.4.6 Transmitter Audio Processing

3.4.7 Opto Isolated Keying

3.4.8 Relay Out put

3.4.9 Fan Control

3.4.10 RSSI

3.4.11 Receiver Gate

3.4.12 Receiver Inhibit

3.5 Fan Operation

4 Installation

4.1 Personal Safety

4.1.1 Lethal Voltages

4.1.2 Explosive Environments

4.1.3 Proximity to RF Transmissions

4.1.4 High Temperatures

4.2 Equipment Safety

4.2.1 ESD Precautions

4.2.2 Antenna Load

4.2.3 Equipment Grounding

4.2.4 Installation and Servicing Personnel

4.3 Regulatory Information

4.3.1 Distress Frequencies

4.3.2 FCC Compliance

4.3.3 Unauthorised Modifications

4.3.4 Health, Safety and Electromagnetic Compatibility in Europe

4.4 Environmental Conditions

4.4.1 Operating Temperature Range

4.4.2 Humidity

4.4.3 Dust and Dirt

4.5 Grounding and Lightning Protection

4.5.1 Electrical Ground

4.5.2 Lightning Ground

4.6 Recommended Tools

4.7 Ventilation

4.7.1 Cabinet and Rack Ventilation

4.8 Installing the Base Station

4.8.1 Unpacking the Equipment