Exicom EX7100 1 Users manual

EX7100 Technical Manual – VHF Fan Assembly

VHF EX7100 Fan Box (Type 8057)

1.0 General

A Fan Box has been designed to assist with the cooling of the PA Heatsink cast ing f or the VHF EX7100 product range.

The Fan Box consists of a metal enclosur e with two (2) fan assemblies that f its over (and is bolted to) the existing PA Heatsink. DC Supply for the fans is provided by the existing DC input socket on the rear of the EX7100 Terminal.

1.0.1 Date of release

All VHF EX7100 Terminals produced aft er 1 May 2001 will include the Fan Box (Product Code 61-8057-00002). It will be factory-fitted during the manufacturing process.

1.0.2 Terminal Mounting Considerations

The Fan Box fits snugly around the existing PA Heatsink casting and does not adversely affect the overall width or depth of the EX7100 Terminal but does

affect the height .

The top of the Fan Box will be approximately 40mm above the top cover of t he EX7100 Terminal. However, as it is recommended that a gap of at least 2U (89mm) is left above/below the EX7100 Terminal and any other equipment, this additional height should not become a problem for standard 19” Rack mounting.

2.0 Removal Instructions

The following sections detail the steps necessary to rem ove the Fan Box to allow access to the PA Heatsink casting.

2.0.1 Tools required

> M5 Short Arm Hex Wrench > Medium sized insulated flat-blade screwdriver

2.0.2 Procedure

1) It is necessary to isolate the EX7100 Term inal f rom any mounting shelf prior to removal of the Assembly.

(Depending on the leng ths of any antenna, telephone or DC power cables, it will probably

be necessary to remove these to allow unobstructed Terminal access)

2) Switch off the DC supply to the Terminal (if not already removed) and place the Terminal on a clean, flat surface.

3) Refer to Figure 1 (overleaf) and remove the 2x M6 socket cap screws and washers from the Fan Box Assembly using the Short arm Hex wrench. The removed screws and washers should be put to one side for future r eplacem ent.

EX7100 Technical Manual – VHF Fan Assembly

Figure 1: Assembly connected to the EX7100 Terminal

4) Remove the Fan Box DC supply cable from the rear of the EX7100 Terminal, taking careful note of the existing wire connections f or future re-assembly (the BROWN wire is connected to the +ve input and the BLUE wire is connected to the –ve input)

5) Carefully remove the Fan Box Assembly from the EX7100 Terminal. Access is now available to the PA Heatsink casting.

6) Refer to Section 7 of t he EX7100 Technical Manual for further infor mation regarding the replacement of the Heatsink casting and/or the PA Assembly.

7) Reverse the above-mentioned steps as required t o r e- assem b le t he Fan Box.

EX7100 Technical Manual - Mandatory Regulations

The following information outlines the mandatory regulations governing the installation and operation of the Exicom EX7100 digit al radio link.

Adherence to this information is necessar y to ensure regulatory compliance.

1.0 General Requirements

This equipment shall be configured only with those assemblies as specified in the Technical Manual and shall only be mounted as instructed.

1.0.1 Danger

The Modem/Controller module contains a lithium bat ter y. Ther e is a danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.

Dispose of used batteries according t o the manufacturers instructions. Do not recharg e, disassemble or incinerate.

Mandatory Regulations

1.0.2 Warning

This equipment must only be installed and maintained by service personnel.

1.0.3 Access to the Equipment

The EX7100 digital radio link should be installed in a location or environment that prevents unauthorised access.

1.0.4 Equipment Port and Connector Classifications

The EX7100 digital r adio link contains various ports and connectors t hat are classified as either Safety Extra Low Voltage (SELV) or T elecommunication Network Voltage (TNV) as follows:

SELV TNV

> DC Power Input > G.703 (3x ports) > I/O > Sync Data

> Line Interface Module Connector

> Control > LMS > Front Panel Test Pin Sockets Connect SELV circuits on this equipment

only

to other SELV compliant circuits as

defined in AS/NZS 3260 and IEC950.

Connect TNV circuits on this equipment

only

to other TNV compliant circuits as

defined in AS/NZS 3260 and IEC950

EX7100 Technical Manual - Mandatory Regulations

1.0.5 Telecom Safety Earth

The wire used for saf et y eart hing should be a minimum of 4mm2 and should preferably be directly connected to an earthing stak e dr iven into t he ground

Refer to Section 2.8 of t he Technical Manual for specific instructions

2.0 Country-specific Regulations

The following sections detail any regulations that may be required by specific countries and/or territories.

2.0.1 New Zealand Regulation - PTC 200

• “The grant of a Telepermit for any item of terminal equipment indicates only that

Telecom has accepted t hat the it em complies with minimum conditions f or connection to its network. It indicates no endorsement of the product by Telecom, nor does it provide any sort of warranty. Above all, it provides no assurance that any item will work correctly in all respects with another item of Telepermitted equipment of a different make or model, nor does it imply that any product is compatible with all of Telecom’s network services.”

• “This equipment m ay not provide for the eff ective hand-over of a call to another device

connected to the same line.”

• “IMPORTANT NOTICE

Under power failure conditions, this device may not operate. Please ensure that a separate telephone, not dependent on local power, is available for emergency use.”

• “Use of pulse dialling, when this equipment is connected to the same line as other

equipment, may give rise to bell tinkle or noise and may also cause a false answer condition. Should such problems occur, the user should NOT contact the Telecom Faults Service.”

• “Devices designed to respond to particular ringing cadences may not respond when

used with this equipment.”

• In the event of any problem with this device, it is to be disconnected and a CPE item

connected to one of its terminal ports m ay be connected directly in its place. T he user should then arrange for the product to be repair ed. Should the matter be reported to Telecom as a wiring fault, and the f ault be proven to be due to this product, a call-out charge will be incurred.”

• “Note that the receive audio line level must not be more than 3dB higher than the

transmit audio line level. (for typical installations using short telephone cable lengths, it is recommended that the receive audio line level is set for –3dBm)”

• “The maximum number of parallel CPE devices that can satisfactorily be operated on

a single port is two (2)”

• “This unit should be powered from a supply that is compliant with AS/NZS3260 and is

SELV compliant”

EX7100

TECHNICAL

MANUAL

All rights reserved. This publication is copyrig ht. No part of this work may be reproduced or copied in any form or by any means (electrical, mechanical, photocopying, microfilm ing, recording or otherwise) without the written permission of Exicom Technologies (1996) Ltd, Private Bag 50912, Porirua, New Zealand.

Confidentiality This document contains confidential information which belongs to Exicom Technologies (1996) Limited. All information is supplied to you in confidence on the basis that it must not be used by you (except for product evaluation purposes) or disclosed to any person without Exicom Technologies (1996) Limited’s prior written consent.

Any breach of the above obligation may be restrained by legal proceedings seeking remedies including injunctions, damages and costs.

Disclaimer

Exicom Technologies (1996) Limited constantly seeks to improve quality and performance. Therefore, specif ications and configurations are subject t o change without notice.

Product code: 61-8031-00002

EX7100 Technical Manual - Contents

3.4.1 Universal Parameters 3-3 Passwords 3-3 Changing the Time and Date 3-5 Operating Mode 3-5 Link ID 3-6 Terminal Descriptor 3-7 Changing the RF Channel Increment 3-7 Changing the Local Transmitter Frequency 3-8 Changing the Local Receiver Frequency 3-10 Transmitter RF Power Level 3-11 Interface Type 3-11

3.4.2 Data Terminal Parameters 3-12 Tx Data Clock Synchronisation 3-12 Sync Data Polarity 3-13

3.4.3 Exchange Terminal Parameters 3-14 Operating Mode 3-14 Channel Set-up 3-14 Payphone Metering Frequency 3-15 Transmit Audio Line Level 3-16

EX7100 Technical Manual - Contents

Page

Receive Audio Line Level 3-16

3.4.4 Subscriber Terminal Parameters 3-17 Ringer Frequency 3-17 Line Termination Impedance 3-17 Payphone Metering Frequency 3-18 Transmit Audio Line Level 3-19 Receive Audio Line Level 3-19 Telephone Loop Current 3-20

4 Monitoring and Diagnostics

4.1 General 4-1

4.2 Monitoring the EX7100’s Operation 4-1

4.2.1 RF Parameters 4-1

4.2.2 Power Supply Parameters 4-2

4.2.3 Framer Parameters 4-3

4.3 Monitoring a Remote Terminal 4-3

4.3.1 Setting up a Test Link 4-4

4.3.2 Closing the Test Link 4-5

4.3.3 Changing Operating Frequencies Remotely 4-5

4.4 EX7100 Internal Alarms 4-7

4.4.1 Acknowledging an Alarm 4-8

4.4.2 Setting Alarm Priorities 4-8

4.4.3 Link Up Time Alarm 4-9

4.4.4 Low RSSI Alarm 4-10

4.5 Diagnostic Tools 4-10

4.5.1 System Align Mode 4-10

4.5.2 Digital Loopbacks 4-11 Local Loopback 4-12 Remote Loopback 4-12 Enabling Digital Loopbacks 4-12

4.5.3 Analogue Loopbacks 4-13 Local Loopback 4-13 Remote Loopback 4-13 Enabling Analogue Loopbacks 4-14

4.6 Bit Error Rate Testing 4-14

4.6.1 General 4-14

4.6.2 BER Testing an EX7100: End-to-End 4-15

4.6.3 BER Testing an EX7100: Round-Trip 4-17

4.6.4 BER Testing an EX7100: Local Interface 4-17

4.7 Networking EX7100 Terminals 4-18

4.7.1 General 4-18

4.7.2 Interconnection of Local Terminals 4-18

Page

4.7.3 Accessing Bussed Terminals 4-19

EX7100 Technical Manual - Contents

5 Troubleshooting the EX7100

5.1 General 5-1

5.2 Configuration Issues 5-1

6 EX7100 Top and Bottom Cover Removal

6.1 Procedure 6-1

7 Module Descriptions

7.1 General 7-1

General (Non-RF) Modules 7-1 RF Modules 7-1 Line Interface Modules 7-1

7.2 Power Supply Module Type 2964 7-3

7.2.1 General 7-3

7.2.2 Testing and Fault Diagnosis 7-4 General 7-4 Accessing the Power Supply 7-5 Diagnosis 7-5

7.2.3 Alignment 7-7

7.2.4 Module Replacement Procedure 7-7

7.3 VHF Transmitter Module Type 8027 7-9

7.3.1 General 7-9

7.3.2 Testing and Fault Diagnosis 7-10 General 7-10 Accessing the VHF Transmitter Module 7-11 Diagnosis 7-11

7.3.3 Alignment 7-13 Re-tuning of the VHF Transmitter Module 7-13 Carrier Null 7-13

7.3.4 VHF Transmitter Module Replacement Procedure 7-14

7.4 UHF Transmitter Module Type 8053 7-15

7.4.1 General 7-15

7.4.2 Testing and Fault Diagnosis 7-16 General 7-16 Accessing the Transmitter Module 7-17 Diagnosis 7-17

7.4.3 Alignment 7-19 Re-tuning of the Transmitter Module 7-19 Carrier Null 7-20

EX7100 Technical Manual - Contents

Page

7.4.4 UHF Transmitter Module Replacement Procedure 7-20 Replacement of the Type 8044 Sub-Module 7-20 Removal of the Transmitter Module 7-22

7.5 VHF RF Power Amplifier Module Type 8028 7-23

7.5.1 General 7-23

7.5.2 Testing and Fault Diagnosis 7-24 VHF RF Power Amplifier Module Testing 7-24

7.5.3 Alignment 7-27

7.5.4 VHF RF Power Amplifier Replacement Procedure 7-27

7.6 UHF RF Power Amplifier Module Type 8048 7-28

7.6.1 General 7-28

7.6.2 Testing and Fault Diagnosis 7-29 UHF RF Power Amplifier Module Testing 7-29

7.6.3 Alignment 7-32

7.6.4 UHF RF Power Amplifier Replacement Procedure 7-32

7.7 VHF Receiver Module Type 8029 7-34

7.7.1 General 7-34

7.7.2 Testing and Fault Diagnosis 7-34 General 7-34 Accessing the VHF Receiver Module 7-35 Diagnosis 7-35

7.7.3 Alignment 7-37 Module Re-tuning 7-37 Receiver Maintenance Adjustments 7-38

7.7.4 VHF Receiver Replacement Procedure 7-38

7.8 UHF Receiver Module Type 8054 7-40

7.8.1 General 7-40

7.8.2 Testing and Fault Diagnosis 7-40 General 7-40 Accessing the UHF Receiver Module 7-40 Diagnosis 7-41

7.8.3 Alignment 7-43 Module Re-tuning 7-43 Receiver Maintenance Adjustments 7-44

7.8.4 UHF Receiver Replacement Procedure 7-44 Removal of the Type 8055 Front-End Module 7-44 Removal of the Receiver Module 7-46

7.9 VHF Duplex Filter Module Type 8013 7-47

7.9.1 General 7-47 VHF Connections 7-47 VHF Mounting 7-47

EX7100 Technical Manual - Contents

Page

7.9.2 Testing and Fault Diagnosis 7-48 General 7-48 Checking RF Connectors 7-48

7.9.3 Alignment 7-48 VHF Module Re-tuning 7-48

7.9.4 VHF Duplex Filter Replacement Procedure 7-50

7.10 UHF Duplex Filter Module Type 8045 7-51

7.10.1 General 7-51 UHF Connections 7-51 UHF Mounting 7-51

7.10.2 T esting and Fault Diagnosis 7-52 General 7-52 Checking RF Connectors 7-52

7.10.3 Alignment 7-52 BRBP Filter Adjustment (HPF) 7-54 BPBR Filter Adjustment (LPF) 7-54 Duplex Filter Adjustment (HPF) 7-54

7.10.4 Duplex Tuning / Perform ance checks 7-55

7.10.5 UHF Duplex Filter Replacem ent Procedure 7-56

7.11 Modem/Controller Module Type 2966 7-57

7.11.1 General 7-57

7.11.2 T esting and Fault Diagnosis 7-58 General 7-58 Accessing the Modem/Controller 7-58 Diagnosis 7-58

7.11.3 Alignment 7-60

7.11.4 Modem/Controller Module Replacement Procedure 7-60

7.12 Front Panel Module Type 2994 7-61

7.12.1 General 7-61

7.12.2 T esting and Fault Diagnosis 7-62

7.12.3 Alignment 7-63

7.12.4 Module Replacement Procedure 7-63

7.13 Line Interfaces Type 2971 and Type 2967 7-64

7.13.1 General 7-64 Isolated Power Supply Module Type 2990 7-64 Four wire + E & M Interface Type 8022 7-64

7.13.2 T esting and Fault Diagnosis 7-66 General 7-66 Accessing the Line Interface Module 7-66 Diagnosis 7-66

7.13.3 Alignment/Re-tuning 7-67

Page

7.13.4 Line Int erf ace Replacement Procedure 7-68

7.14 Isolated Power Supply Type 2990 7-69

7.14.1 General 7-69

7.14.2 Description 7-69

7.14.3 T esting and Fault Diagnosis 7-69 Accessing the Isolated Power Supply Module 7-70 Diagnosis 7-70

EX7100 Technical Manual - Contents

8 EX7100 Repeater Configuration

8.1 General 8-1

8.2 Installation 8-1

8.3 Terminal Interconnections 8-1

G.703 Interconnect 8-1 Control Interconnect 8-2

8.4 Software Configuration 8-2

8.5 Remote Monitoring 8-2

Appendix A Connector Pi n Infor mation

A.1 LMS A-1 A.2 Control A-1 A.3 G.703 A-2 A.4 Synchronous Data A-2 A.5 Input/Output A-3 A.6 Line Interface A-4 A.7 Sync Data (DB15) to V.35 (M34) Interface Cable A-6

Appendix B Options

B.1 Line Terminating Frame B-1

Primary Lightning Protection B-1

B.2 ELMS (Exicom Link Management System) B-2

EX7100 Technical Manual - Contents

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EX7100 Technical Manual - List of Figures

List of Figures

Page

1.1 Typical BER curve 1-9

2.1 Antenna Polarisation 2-2

2.2 Antenna Direction 2-3

2.3 UHF Duplexer Connections 2-6

2.4 External Alarms 2-10

2.5 EX7100 Front Panel Display - Initialisation Test 2-11

2.6 EX7100 Front Panel Display - Idle State 2-11

2.7 EX7100 Front Panel Display - Order Specified Terminal Descriptor 2-11

2.8 Antenna Alignment 2-12

3.1 EX7100 Front Panel Display and Keypad 3- 1

3.2 EX7100 Front Panel Display - RSSI Reading 3-2

4.1 Two Terminal Link 4-3

4.2 Two Terminal Link with Repeater Terminal 4-3

4.3 Digital Loopback Configurations 4-11

4.4 Analogue Loopback Configurations 4-13

4.5 End-to-end Bit Error Rate Test 4-15

4.6 Round-trip Bit Error Rate Test 4-15

4.7 Local Interface Bit Error Rate Test 4-15

4.8 Networking EX7100 Terminals 4-18

4.9 Three Terminal Bussed Site 4-18

7.1 EX7100 Terminal with Top Cover Removed 7-2

7.2 VHF EX7100 Terminal with Bottom Cover Removed 7-2

7.3 UHF EX7100 Terminal with Bottom Cover Removed 7-3

7.4 Power Supply Block Diagram 7-4

7.5 Power Supply Fault Diagnostic Tree 7-6

7.6 VHF RF Module Connection Block Diagram 7-9

7.7 VHF Transmitter Module in place within an EX7100 Terminal 7-10

7.8 VHF Transmitter Module Fault Diagnostic Tree 7-12

7.9 UHF RF Module Connection Block Diagram 7-15

7.10 UHF Transmitter Module in place within an EX7100 Terminal 7-16

7.11 UHF Transmitter Module Fault Diagnostic Tree 7-18

EX7100 Technical Manual - List of Figures

Page

7.12 Location of Loop Volts adjustment CV101 7-19

7.13 VHF RF Power Amplifier Module in Place within an EX7100 Terminal 7-23

7.14 VHF PA Module Test set-up 7-25

7.15 Bottom Cover Screws for VHF PA Removal 7-26

7.16 Heat Sink Screws for VHF PA Removal 7-26

7.17 UHF RF Power Amplifier Module in Place within an EX7100 Terminal 7-28

7.18 UHF PA Module Test set-up 7-30

7.19 Bottom Cover Screws for UHF PA Removal 7-31

7.20 Heat Sink Screws for UHF PA Removal 7-31

7.21 VHF Receiver Module in Place within Terminal 7-34

7.22 VHF Receiver Module Fault Diagnostic Tree 7-36

7.23 UHF Receiver Module in Place within Terminal 7-40

7.24 UHF Receiver Module Fault Diagnostic Tree 7-42

7.25 Location of Loop Volts adjustment CV101 7-43

7.26 VHF Duplex Filter Adjustment Locations 7-49

7.27 UHF Duplex Filter Adjustment Locations 7-53

7.28 Modem/Controller Block Diagram 7-57

7.29 Modem/Controller in Place within Terminal 7-57

7.30 Modem/Controller Fault Diagnostic Tree 7-59

7.31 Front Panel Block Diagram 7-61

7.32 Front Panel Fault Diagnostic Tree 7-62

7.33 Six Channel Line Interface Connection Block Diagram 7-64

7.34 Subscriber Line Interface in Place within Terminal 7-65

7.35 Exchange Line Interface in Place within Terminal 7-65

7.36 Six Channel Line Interface Fault Diagnostic Tree 7-67

8.1 EX7100 Repeater 8-1

EX7100 Technical Manual - Introduction

1.1 General

The EX7100 is a unique digital radio primarily designed to meet the requirements of customers who require thin route communications, especially in remote and rural locations, but also in urban areas where digital linking is required. It is an ideal solution where copper wires are too expensive or difficult to install.

The EX7100 is a 64kbit/s dig ital radio that operates within a 25kHz RF channel. It has a number of unique features including:

> On-demand operation, > Automatic fax and modem data detection ( with inter nal multiplexer installed),

1

Introduction

> G.703 and Synchronous Data interface (V.35) t o connect to external devices, > An optional internal six circuit, voice/fax/data, multiplexer, > High system gain with 2 W att or 10 Watt power amplifier options, > Inherent security through proprietary digital encoding, > Robust design to operate in a variety of environmental condit ions.

1.2 Configuration

The EX7100 is a point to point, line of sight system available in two configurations as detailed below:

1.2.1 64 kbit/s digital “pipe”

The 64kbps single channel config uration uses G.703 and/or synchronous data interfaces (V.35), for connection to external OEM multiplexers, bridges, routers, LAN’s, etc. The actual transmitted bit rate including system overheads is 68 kbit/ s, allowing a full 64 kbit/s for the user.

This congifuration is also used to provide a full duplex repeater option, based on two terminals back-to-back at G. 703 inter f ace. A r epeater enables t he user t o gr eatly increase the distance between the end terminals

EX7100 Technical Manual - Introduction

1.2.2 Six low bit rate voice/fax/data channels

With the addition of an internal multiplexer/line interface card the EX7100 provides six, low bit rate, voice/fax/data channels.

This option is designed to replicate six individual standard wireline telephone circuits and caters for both 2-wire and 4-wire + E&M (with additional card) telephone operation. Line drivers and ringers are integral to t he card, allowing telephone equipment to be situated up to 5 kilometres fr om the terminal when used with external lightning protection.

Most equipment normally connected to telephone lines may be connected to each channel of the EX7100, including payphone (12/16 kHz meter pulse or line reversal), electronic funds transfer terminals, G3 fax and data traf fic at up to 9600bps.

Note that provision of voice/fax data tr affic requires external telephone modems at each location. Modem/Fax data rate is limited to 9600bps.

The six-channel version of the EX7100 is available in two configur ations:

Exchange Terminal

Provides connection for six telephone circuits (either 2-wire or 4-wire +E&M) from the PSTN. Using two exchange terminals, t he link may be config ured in software for Point-t oPoint Data terminal operation, providing six 9600bps data channels with 4-wire + E&M interface.

Subscriber Terminal:

Provides connection for Subscriber equipment (2-wire), such as telephones, facsimile, modem, etc.

Note: The telephone interface circuit boards within these terminals are specific to each

terminal type, i.e. an Exchange terminal cannot be linked as a Subscriber terminal, or vice versa.

EX7100 Technical Manual - Introduction

1.3 About this Manual

This Manual contains all the information necessary to enable installation and configurat ion of an EX7100 as well as module and fault diagnosis information.

1.4 Terminology

The following terms and abbreviations are used throughout this manual:

BER Bit Error Rate, BERT Bit Error Rate Test, DSP Digital Signal Processing, ESN Electronic Serial Number, LCD Liquid Crystal Display LED Light Emitting Diode, LMS Link Management System, LTF Line Terminating Frame, MDF Main Distribution Frame, PA Power Amplifier POTS Plain O ld Telephone System PSTN Public Switched Telephone Network PSU Power Supply Unit, RSSI Receive Signal Str ength Indication, TCXO Temperature Controlled Crystal Oscillat or , VSWR Voltage Standing Wave Ratio.

This manual refers to “Exchange Terminal” and “Subscriber Terminal” however the installation instructions apply equally to non-telephone, or Dat a, systems.

EX7100 Technical Manual - Introduction

1.5 EX7100 Specifications

1.5.1 System Parameters

Frequency Bands (MHz) (Other bands to follow)

RF Frequency Stability Available Digital Bandwidth

Channel Data Rate

138-174, 400-520 240-270, 335-400, 800-900, 1400

± 1.5 ppm 64 kbit/s 68 kbit/s

RF Bandwidth Digital Interface

Duplexer

25kHz G.703 or V.35 synchronous VHF: Internal Notch Type UHF: External Notch Type + Band Pass

Frequency Selection Channel Selection

Maximum Transmitter power @ duplexer output (PEP)

Synthesiser in 5.0 or 6.25kHz steps Via front panel LCD or external ter m inal

UHF > +31 to +40 dBm (1.25 to 10 W) variable > +24 to +33 dBm (0.25 to 2 W) variable

VHF > +31 to +40 dBm (1.25 to 10W) variable > +24 to +30 dBm (0.25 to 1 W) variable

Duty Cycle Emission Designator

Receive Sensitivity 10-3 BER

100% @ 60 °C ambient, < 3000 feet AMSL 18K4D1WET

< -105 dBm (<1.3 µV) @ Rx input

1.5.2 Power, Mechanical and Environmental

Ambient Operating Temperature Humidity

Size of basic system (H x W x D)

-10 °C to +60 °C up to 95% relative humidity, 0 °C to +45 °C,

non-condensing VHF: (3U) 135 mm x 483 mm x 425mm UHF: (4U) 175 mm x 483 mm x 425 mm

1

Weight Physical Mounting Line Lightning Protection

Approx. 15 kg Rack Mount Secondary Lightning Protection

1

425mm depth dimension measured from front panel handle to end of rear panel bracket. Additional depth allowance

may be required to cater for connecting cables etc.

EX7100 Technical Manual - Introduction

Power Supply

1

10.8 - 30 VDC and 30 - 60 VDC, positive or negative earth for 12/24/ 48 VDC power systems

Power Consumption

Standby, 64 kbit/s config uration 35 W Standby, 6 Ch. configuration 40 W Tx 10 Watt, 64 kbit/s configuration Typical 65 W

Maximum 100 W Tx 10 Watt, 6 Ch. Configuration Typical 85 W Maximum 120 W Tx 2 Watt, 64 kbit/s configuration

Tx 2 Watt, 6 Ch. configuration (2 W figures above TO BE ADVISED)

1.5.3 Multi-channel Voice and Data Multiplexer

Purpose Integral Multiplexer Interface Number of Channels used Exchange/Subscriber Line

Connections Voice Quality

For data and low bit rate voice options Proprietary Up to six low bit rate voice/data/fax Via 50-way CHAMP connector

Near toll quality - MOS (64 kbit/s PCM MOS = 4.2, 32 kbit/s ADPCM

MOS = 3.8)

3

= 3.9

2

Voice Compression Audio Frequency Response Line Interfaces

MP-MLQ @ 6.3 kbit/s (ITU-T G 723.1) 300 to 3400 Hz typical 2-wire, 600Ω/900Ω/complex, 4-wire + E&M

(optional)

Telephone Interface (2-Wire)

2-wire, 600Ω/900Ω/complex, maximum DC loop resistance 1500Ω, 50 V DC supply

Rx/Tx Line Levels 2 Wire 4 Wire

Line Drive Current Payphone Interface Fax and data detection

Fax Speed Data Speed

1

Refer to Section 2, page 2-6 for IMPORTANT WARNINGS re the power supply

2

6 Channel Tx power consumption is maxi mum with 6 channels operational with 25 mA loop current and no ringing

3

MOS = Mean Opinion Score as defined by ITU-T Rec. P80 and tested by AT&T Study Group 15

-15 dBm to +3 dBm

-15 dBm to +3 dBm or –11 dBm to +7 dBm 25 or 45 mA selectable 12/16 kHz meter pulse and line reversal

Automatic G3 up to 9.6 kbit/s Up to 9.6 kbit/s with telephone modems

EX7100 Technical Manual - Introduction

1.5.4 Data Channel

Data Interfaces Data Rate Connections G.703 - 75 ΩΩΩΩ G.703 - 120 ΩΩΩΩ

Synch. Data

1.5.5 System Management

Basic Front Panel Metering

Configuration

System management Standard Inter-site Communications

Communications and Signalling data channel

Monitoring of site security or other alarms

Channel Selection

G.703 or V.35 synchronous 64 kbit/s BNC Connectors DB15 Connector DB15 Connector to standard V.35 connectors

on extender cable

1

LCD digital with bar graph and test points for connection of external voltmeter

Menu driven 16x2 LCD with six button control or via RS485 connection to external PC

Proprietary RS485 communications with daisy-chain

capability 1000 bit/s (not user accessible)

Six I/O Ports

Via front panel LCD or external ter m inal

System Management Functions

-3

• BER alarm set 10 adjustable

to 10-5

• Loopback on each line (6 channel)

• Repeater mode • 64 kbit/s loopback, local/remote

• Set link active excess alarm time • Set individual Receiver and

Transmitter RF frequencies

• Adjust transmit power level • Antenna alignment mode

• Audio line levels

Alarms

-3

• BER set 10

to 10-5 adjustable • Low input voltage

• Low receive signal level • Synth lock fail

• Link up time • External alarms

• Tx high VSW R and low power • Lost modem lock

• Internal voltage rail fault • Link fail alarm

• Over Temperature (UHF 10 W) •

Digital and Analogue Meter Tests and Bar Graph

• Receive signal levels • DC input voltage

• Current consumption • Internal voltage rails

• Tx Heatsink temperature

1

DB15 connector has a proprietary pin-out, refer to Appendix A sections A.3 and A.4 for details

EX7100 Technical Manual - Introduction

1.6 System Planning

Digital Radio link planning is a complex procedure req uiring a study of each site and the path between each site. Exicom T echnologies is able to assist in system planning if this is required.

Specialist software packages are used by Radio System Engineers to determine path losses and sources of interfering signals that may affect the reliability of the radio link. (Unlike an FM signal, a digital radio signal is suscept ible to interf erence and f ades, similar to those found on television broadcast systems)

The EX7100 is capable, under ideal circumstances, of providing communications over paths of more than 50 kilom et r es.

However, the following considerations must be taken into account, which will assist in determining the maximum link dist ance and system r eliability:

> Operating frequencies > Free Space loss > Terrain effects: Absorption and Reflection losses > Antenna gain and position > Cable losses > Transmit power > Receiver sensitivity > Required fade margin Further to these considerations, the system designer must be aware of factors at each

site, which may affect the reliabilit y of the radio link. These f act ors include: > Access to a reliable power source. > Antenna height. > Access to a suitable grounding system. > Lightning and surge protect ion > Other radiating and receiving systems using t he site

EX7100 Technical Manual - Introduction

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EX7100 Technical Manual - Introduction

1.00E-02

1.00E-03

1.00E-04

BER

1.00E-05

1.00E-06

VHF/UHF E X 7100 at 'nominal' operating temp range

VHF/UHF E X 7100 at 'extreme' operating temp range

-10 to +45 C

-30 to +60 C

1.00E-07

-108 -107 -106 -105 -104 -103 -102 -101 -100 -99 -98 -97 -96 -95

Receive level (dBm )

Figure 1.1: Typical BER curve

EX7100 Technical Manual - Introduction

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EX7100 Technical Manual - Installation of Antenna and Equipment

Installation of Antenna and Equipment

2.1 General

2

Although EX7100 Radio Link terminals can be installed in any order, the following sequence should be followed to ensure that minimum t im e is spent on installation.

> Install Exchange antenna (Section 2.3), > Mount the Exchange terminal (Sections 2.4 and 2.5), > Connect power, antenna and interface cables to the Exchange t er m inal (Section 2.6), > Configure and test Exchange ter m inal ( Sect ion 3) , > Repeat the above steps for the installation of the Subscriber antenna, Subscriber

terminal and cabling (Sections 2.3 to 2.6 inclusive and Section 3) , > Final antenna alignment at Subscriber site ( Sect ion 2.11), > Final antenna alignment at Exchange site (Section 2. 11) .

THIS EQUIPMENT MUST ONLY BE INSTALLED AND MAINTAINED BY SERVICE PERSONNEL

WARNING

> Establish a test link to confir m oper at ion of system (Sections 4.3.1 and 4.3.2),

Note: Ensure that the correct terminal is dispatched to the appropriate site (Terminal

information can be found on a label on the side of the packing box).

2.2 Antenna Sites

Antenna sites for the EX7100 installat ion should have been chosen as part of the system planning process (Refer to Section 1.6). If they have not been selected, contact your Exicom International Supplier.

Radio path planning is a highly technical procedure and should only be performed by a qualified person.

EX7100 Technical Manual - Installation of Antenna and Equipment

2.3 Mounting the Antenna

The antenna should be mounted high enough so that it is in "line-of-sight" with the antenna at the other radio site (antenna heig ht may have been determined during system planning). The antenna should be placed at least 10 m etres (VHF) or 3.5 metres (UHF) from any metallic or conductive objects to avoid possible impaired operation of the EX7100 link and fastened securely to protect against the effect s of strong winds.

When mounting the antenna, ensure it is pointing in the correct direction with the correct polarisation. Final adjustments to t he antenna direction are made af ter both terminals are installed. Refer to Section 2. 11 " Final Antenna Alignment".

2.3.1 Antenna Polarisation

The site plan should include details of antenna polar isation. If it doesn't, use t he following information as a guide:

The antenna may be mounted with either vertical or horizontal polarisation. Figure 2.1 shows an antenna mounted with vertical polarisation (top) and horizontal polarisation (bottom). In general, either polarisation can be used although each antenna must identical polarisation.

have

Note: Vertical antenna polarisation is prefer red if the r adio link is to be used over a body

of water such as a lake or sea.

Figure 2.1: Antenna Polarisation

EX7100 Technical Manual - Installation of Antenna and Equipment

2.3.2 Antenna Direction

The site plan should include details of antenna direction. If it doesn't, use the following information as a guide:

Refer to a map with the antenna sites marked. The antennas must point towards each other in a straight line for the link to operate eff ectively. Take a compass bearing of each antenna as shown in Figure 2.2. This is the direction the antenna should point towards when mounted.

Figure 2.2: Antenna Direction

2.3.3 Antenna Cable Grounding Kits

To assist with lightning protection, coaxial cable grounding kits should be used at each site. Grounding of the cable is recommended at the tower top, tower bottom and at the entrance to the equipment shelter .

A range of grounding kits are available. Contact your Exicom International Supplier for details.

2.4

f

EX7100 Technical Manual - Installation of Antenna and Equipment

Positioning the EX7100 Terminal

Before deciding on the position of the terminal, consider the following: > The antenna coaxial cable should be as short as practical to m inimise transmission

losses, > The EX7100 requires good ventilation to allow generated heat t o escape. Although

the maximum temperature environment f or the EX 7100 is +60°C, lower temperatur es

will assist with trouble-free operation, as is the case with most elect r onic equipment,

Always allow a gap of at least 2U

1

(89mm) above/below the terminal and any other

equipment, > The EX7100 should be mounted close to a source of power, telephone wires (if

required) and the antenna cable. Note: Ensure that sufficient room for any cables

(including adequate bend radius etc) is present prior to positioning the terminal > Access to a good earth is essential (separate t o m ains ear t h) r efer to Section 2.8, > It may be necessary during the installation process (or subsequent servicing) to

access the rear panel of the term inal. Sufficient room should therefore be provided

around the terminal to allow access to any connections (such as the RS485 port that

may be used for PC control during test ing and set-up).

2

Ensure that the equipment racks are stable and capable o supporting the weight of the EX7100 terminal before equipment installation. Note t hat unsecur ed rack s may tip over, causing damage to equipment or personal injury

WARNING

1

One U = 44.5 mm or 1 ¾ inch

2

Terminal depth of 425mm is measured from front panel handle to end of rear panel bracket. Additional

depth allowance may be required to cater for connecting cables etc.

EX7100 Technical Manual - Installation of Antenna and Equipment

2.5 Mounting the Terminal in the Rack

The EX7100 is compatible with the industry standard 19" rack system and occupies 3U1 (VHF) or 4U (UHF) of vertical space.

> Attach the handles to the EX7100 front panel using the handle kit supplied. > Attach the front panel to t he r adio t erminal using the six screws supplied. > Mount the terminal to the r ack using the f our front panel mounting points. Due to the

weight of the EX7100 terminal (approx. 15 kg), it is highly recommended that the

terminal be supported with the use of angled side rails. These rails are commonly

found in 19” racking systems (but are not > Ensure that the terminal’s chassis ground is connected to the equipment rack’s

ground via the chassis earth screw terminal. (Refer to Section 2.8)

included with EX7100 terminals).

2.6 Cable Connections

2.6.1 General

Cable configuration is dependent on the variant of the terminal being installed, i.e. Data, Exchange, or Subscriber. (Refer t o section 1.2)

However, there are some generic connections required, r egardless of variant type: > The RF connection, > The power supply connection, > The earth connection.

RF Connection

VHF system cable to the N-type socket mark ed ‘ANT’.

UHF system: antenna’s coaxial cable to the N-type antenna socket on the lid of the terminal. If the duplexer leads have been disconnected from RF connectors on the rear panel, it is important they are reconnected correctly.

The connector marked thus: is connect ed to the Transmitter. (RF out) .

: The VHF EX7100 uses an internal duplexer Connect t he antenna’s coaxial

The UHF EX7100 uses an externally mounted duplexer. Connect the

The connector marked thus: is connect ed t o the Receiver. (RF in).

1

One U = 44.5 mm or 1 ¾ inch

EX7100 Technical Manual - Installation of Antenna and Equipment

If the terminal’s transmitter frequency is higher t han it’s receiver frequency, the RF output connector should be connected to the high-pass side of the duplexer.

If the terminal’s tr ansmitter frequency is lower than it’s receiver frequency, the RF output connector should be connected to the low-pass side of the duplexer.

Figure 2.3 below shows the RF connections for a UHF duplexer.

Tx or Rx Tx or RxA ntenna

1234567

BRBP

Band Reject

Band Pas s

Filte r

(H PF)

A B C

High

4 Cavit y Duplex filter

D E F G

adjustment

High pass

Figure 2.3: UHF Duplexer Connections

Low

BPBR

Band Pas s

Band Reject

Filter

(LPF)

H I J

adjustment

low pass

A suitable lightning arrestor must

be installed at all times in the coax cable between the EX7100 terminal and the antenna.

EX7100 Technical Manual - Installation of Antenna and Equipment

The arrester must have a direct earth connect ion and must be mounted at either the base of the antenna mast or where the coax cable enters the building. For further detail on mounting the antenna, refer to the documentation that accompanies it.

Note: Ensure that any coaxial connectors exposed to the weather are adequately

protected with suitable weatherproof t ape that com pletely seals the connect or f rom moisture.

DC Power Input

The EX7100 terminal is supplied with two variants of internal power supply: > 10.8 VDC – 30 VDC Input > 30 VDC – 60 VDC Input If the terminal is to be powered by an existing DC power supply, ensure the voltage

supplied by the power supply system falls within one of the ranges detailed above.

Note: The terminal has a built-in sensing circ uit and will not operate if t he supply voltage

or polarity is incorrect.

NOTICE

Supply power to this equipment must be provided via an approved power supply whose output voltages are in accordance with the Safety Extra Low Voltages (SELV) limits as specified in IEC950.

Failure to operate this equipment with this type of power supply would void safety approvals

DC Input cabling should be capable of carrying 15 Am ps @ 12V, 7.5 Amps @ 24V, and

4.0 Amps @ 48V. The maximum

Note: The terminal requires an external fuse (not supplied

permitted voltage drop in the cable is 200mV.

) within the DC Input cabling.

Fuse ratings vary depending on the nominal DC input voltage used:

Nominal DC Input Voltage Fuse Rating

12 V DC 60 Amp HRC type 24 V DC 30 Amp HRC type 48 V DC 20 Amp HRC type

HRC fuses should be used with a minimum current breaking capacity of 5000

Amps (as lead acid batteries are likely to be used to back up the DC supply)

EX7100 Technical Manual - Installation of Antenna and Equipment

Connect the power supply cable to the 3-way connector marked ‘- GND +’. The DC input lines on this connector are floating and have no power connection to the chassis ground (neither the positive nor the negative term inal is connected to the EX7100 chassis). This enables the EX7100 to be powered from either a positive or negative ground supply.

The centre term inal of the DC input connector is connect ed to the EX7100’s chassis and may be strapped to the side of the DC input t hat is at station ground potential.

2.7 Terminal Type Specific Connections

The EX7100 is supplied as one of three types, Data, Exchange, or Subscriber. (Ref er to section 1.2). The interface connections to each terminal type are diff er ent.

Connection details for the three t er minal types are as follows:

2.7.1 Digital Data Terminal Connections

The EX7100 provides both synchronous Data, e.g . V.35 and CCIT T G.703 co-dir ectional, digital interfaces. The terminal automatically detects the presence of a digital interface card.

Selection of the interf ace req uired is m ade in soft ware using the front panel keypad. Refer to Section 3.4.1 for configuration details.

Synchronous Data V.35

Once selected, the synchronous Data interface is m ade available on the DB15 connector labelled ‘SYNC DATA’ on the ter minal’s rear panel. Detailed pin-out information can be found in Appendix A.4.

Various adapter cables are available to cater for V. 35, RS-232 conversion. Contact your Exicom International Supplier for det ails.

G.703

Once selected, the G.703 interface is made available on the DB15 connector labelled ‘G.703’ (for detailed pin-out information refer to Appendix A.3) and also on the pair of BNC connectors labelled ‘G.703’, on the ter m inal’s r ear panel.

The DB15 connector provides a 120 Ohm co-directional interface, whereas the BNC connectors provide a 75 Ohm co-directional interf ace. It should be noted that the arrows alongside the BNC connectors indicate the data flow to and from the terminal.

2.7.2 Exchange Terminal Connections

The EX7100 Exchange terminal allows connection of six 2-wire telephone circuits; six 4wire+E&M telephone circuits, or six 4-wire+E&M data circuits (up to 9600bps).

All circuits are connect ed to t he terminal via the 50-way Champ connector, labelled ‘LINE INTERFACE’, on the terminal’s rear panel. (For detailed pin-out information refer to Appendix A.6)

The Exchange Terminal may be supplied with a 3 or 10 metre cable that can be plugged directly into this connector. The other end of this cable should be terminated into the PSTN’s MDF. Contact your Exicom International Supplier for details.

EX7100 Technical Manual - Installation of Antenna and Equipment

Note: The EX7100 automatically detects the presence of an Exchange interface card.

The terminal is conf ig ured f or 2-wire or 4-wire+E&M, in software via the f ront panel keypad. Refer to Section 3.4. 3 for configuration details.

The Exchange terminal may also be soft ware config ured, via the fr ont panel keyboard, as a point to point Data terminal. Refer to Section 3.4.3 f or configuration details.

2.7.3 Subscriber Terminal Connections

The EX7100 Subscriber terminal provides six 2-wire telephone circuits for connection to equipment such as telephones, payphones, EFT-POS t erminals, etc.

These circuits are accessed from the terminal via the 50-way Champ connector, labelled ‘LINE INTERFACE’, on the terminal’s rear panel. (For detailed pin-out information refer to Appendix A.6)

The Subscriber terminal may be supplied with a 3 or 10 metre cable that can be plugged directly into this connector. The un-terminated end of the cable may be either wired directly to the user equipment, to an existing MDF, or to Exicom’s optional Line Terminating Frame (LTF). Contact your Exicom International Supplier for details

Note: The EX7100 automatically detects the presence of a Subscriber inter face card.

The LTF is available with various connector options, as well as optional Primary Lightning Protection circuitry. Contact your Exicom Int ernational Supplier for fur ther details.

2.8 Earthing the Terminal

The provision of a suitable earth f or the terminal is the responsibility of the installer. The EX7100 has a screw terminal on the rear panel to connect the t er m inal to earth.

This will assist in preventing damage to the terminal from lightning strikes, particularly strikes to the telephone cables. Protection from strikes to the antenna system may be provided by fitting the recommended antenna lightning arrester.

For these protective measures to be effective, the system requires a good earth connection. Mains earth is not

adequate, nor is a thin wire or any wire with bends or twists

in it. The best earth connection is using a suitably heavy wire (e.g. >4 mm

connected straight to an earthing stake driven into the ground If this is not possible, connect the ear t h cable t o the equipment rack ground system .

2.9 Other Rear Panel Connections

2

copper cable)

The EX7100 is f itted with several other rear panel connect ors as detailed below. Some of these connectors will not be used for all applications, however descriptions of their functions are detailed below.

Note: Detailed pin-out infor m ation can be found in Appendix A.

EX7100 Technical Manual - Installation of Antenna and Equipment

2.9.1 Control

A DB9 connector provides access to the internal RS-485 bus for future expansion of the EX7100, and for back-to-back repeater connection. This connector will allow system control of externally mounted interface cards that are yet to be developed. The Control bus is not

user accessible.

2.9.2 LMS

A DB9 connector provides access to the internal RS-485 bus to allow daisy chaining of multiple terminals and connection to an external Link Management device - ELMS. Refer Appendix B-2.

2.9.3 I/O

A DB25 connector provides high and low priority alarm outputs, and six input/output contacts for connection of non-latching externally generated site alarms that are sent across the radio link when triggered.

Important Note: The I/O port is optically isolated. Details of maximum voltages and currents are given in Appendix A.5. Failure to comply with this criteria may cause damage to the I/O port.

External Site Alarms

The EX7100 provides the facility to connect up t o six non-latching external alar m contacts which, when triggered, are sent across the radio link. Alarms may include: Site door alarm, site fire alarm , or generator fuel low alarm.

When an external alarm cont act closes, the alarm is sent across the link, via the engineering channel, and the corresponding output at all intermediate ter m inals ar e triggered. An external alarm appear s on the front panel along with standard alarms.

Received

Burgla r Alarm

External output 0 goes low

Burgla r Alarm

External output 0 goes low

I/O

o o

o

o o

o

o o

EX7100

EXICOM

EX7100

EXICOM

2.9.4 RF

Allows connection to an externally mounted Duplexer, if required. (For example, UHF Duplexer Type 8045)

Transmitted

I/O

o o

Direction of Alarm

Received

Burgla r Alarm

External output 0 goes low

RS -485

o o o o o o

EX7100

EXICOM

o o

o

o o

o

o o

Repeater

Figure 2.4: External Alarms

I/O

EX7100

EX7100EX7100

EXICOM

Burgla r Alarm

External input 0 goes low External output 0 goes low

o o

o

o o

o

o o

EX7100

EX7100 Technical Manual - Installation of Antenna and Equipment

2.10 Powering up the Terminal

2.10.1 General

Before powering up, ensure that all cables are connect ed correctly and that there is DC power to the EX7100 terminal. Pay particular attention to the RF cable assembly, ensuring all connections are tight.

The EX7100 on/off switch is located on t he r ear panel.

Note: This switch has an interlocking feature that prohibits accidental switch off. To

toggle the switch on or off you must pull the switch gently forward.

2.10.2 Procedure

Turn on the EX7100 terminal with the on/of f switch. The EX7100 will perform an internal initialisation test, befor e set tling to its idle state.

Figure 2.5: EX7100 Front Panel Display - Initialisation Test

In this idle state, the f ront panel LCD will display:

initialising

■■■■■■■■■

Figure 2.6: EX7100 Front Panel Display – Idle State

Exicom EX7100

1 Jan 1210:01

Note: ‘Exicom EX7100’ is the factory default t erminal descriptor. This descriptor can be

any 16 character string , and may be changed at any time (Ref er to Section 3.4.1) . If this descriptor was specified at time of order, the display will reflect that. For example:

Figure 2.7: EX7100 Front Panel Display – Order Specified Terminal Descriptor

Exchange no 1

1 Jan 1210:01

If the Operating Mode is configured as ‘100%’ mode, the ‘Tx on’ LED will light and the system will attempt to establish a link with the remote ter minal. This condition will continue until a link has been established, indicated by the ‘Rx lock’ LED being lit.

If the Operating mode is configured as ‘on-demand’ the terminal will not turn on its transmitter until a valid req uest is sent f r om the r elevant user int erf ace, e.g . t elephone of f hook.

EX7100 Technical Manual - Installation of Antenna and Equipment

It is now recommended that you proceed to Section 3 ‘Configuring the Terminal’, to ensure that the EX7100 terminal has been configured for your specif ic applicat ion.

2.11 Final Antenna Alignment

2.11.1 General

This part of t he installation req uires t wo people, or one person with an analogue voltm eter plugged into the terminals front panel monitoring point. The voltmeter leads need to be long enough for the inst aller t o view the display while rotating the ant enna.

You will also need to refer to Section 3 of this Manual for instructions on using the EX7100’s front panel.

Do not stand in front of the antenna, as electromagnetic radiation may be hazardous to your health. Leave at least 1 metre between the installer and the antenna as shown below

Figure 2.8: Antenna Alignment

2.11.2 Alignment Sequence

1) Set up a Test Link by following the procedure outlined in Section 4.3.1.

2) Use the up and down arrow keys to make sure the →→→→ is next to Antenna Align and then press ‘Enter’

12345678 →antenna align

EX7100 Technical Manual - Installation of Antenna and Equipment

3) The local terminal’s transmitter will turn off (Tx LED will go off), allowing the user to adjust the antenna safely. T he r em ot e Tx will remain on for up to 60 minutes. RSSI is now displayed on the screen as well as on the voltmeter inputs on the front panel.

4) While one person watches the RSSI level, the other should move the antenna direction slightly until the RSSI level is at its highest. This is the optim um antenna alignment. Make sure you stand at least one metre behind the active element while taking a reading so as not to cause interference. Tig hten the mounting bolts. (Note: One person can do both tasks if a voltmeter with long leads is connected to the jacks on the front panel.

5) Press ‘Escape’. T he link will restart and the menu will return to Antenna Align. Press ‘Escape’ again then use the up and down arrows to make sure the →→→→ is next to End Remote Tests and then press ‘Enter’.

RSSI: -95 DBM

■■■■■■■■■

RSSI: -90 dbm

■■■■■■■■■■■

Start tests →end remote tests

This completes the installation of the terminal. Repeat this “Final Antenna Alignment” procedure for the other ter minal.

EX7100 Technical Manual - Installation of Antenna and Equipment

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EX7100 Technical Manual - Configuring the Terminal

3.1 General

In many cases, the terminal will have been configured in the factory, however it is recommended that certain operating parameters be checked and corrected as required before attempting to set-up a link.

The EX7100 is equipped with a powerful configuration, monitoring, and diagnostic, system that may be accessed using the six-button keypad and LCD on the f ront panel. The front panel also has four LED's that indicate the operating status of the terminal, as well as any alarms being generated by the terminal.

3.2 Using the Keypad

3

Configuring the Terminal

The EX7100 six-button keypad allows the user to scroll through the user interface menu, and then select, or change, the relevant parameters.

A password is required to allow access to the menu system. This password is ‘1111’, and

cannot be changed

operating parameters. This password may be changed at any time from the Exicom default value of ‘1234’. Refer to Section 3.4.1 for details.

Direction Buttons

The four direction buttons provide up and down scrolling, as well as moving the cursor left and right along any particular line.

Example: To change the default second level password from ‘1234’ to ‘2222’

(Refer to Section 3.4.1 for full details):

> Use the right arrow key to position the ↑↑↑↑ under the ‘1’. > Press the up arrow key once to change the ‘1’ to a 2.

Exicom EX7100 1 Jan 1200.01

. A Second Level password is required to allow amendment of

Figure 3.1: EX7100 Front Panel Display and Keypad

> Press the right arrow key twice to position the ↑↑↑↑ under the ‘3’. > Press the down arrow key once to change the ‘3’ to a 2. > Press the right arrow key once to position the ↑↑↑↑ under the ‘4’. > Press the down arrow key twice to change the ‘4’ to a 2. > Press ‘Enter’ to accept changes.

EX7100 Technical Manual - Configuring the Terminal

Note: The user menu is not

a continuous loop. Once the cursor reaches the bottom of the menu, you must use the up arrow to step back up to the top. Similarly, once the cursor reaches the top of the menu you must use the down arrow to step back down.

‘Enter’ Key

The ‘Enter’ key operates the same as a computer keyboard ‘Enter’ key. This will accept any changes you have made to a parameter, or access the next menu level if available. This will be indicated by a →→→→ symbol.

‘Escape’ Key

The ‘Escape’ key enables the user to back out of a menu location.

3.3 The User Interface Menu

The 16x2 digit display lets the user see two lines of the menu at once. As the user scrolls up or down through the menu, the →→→→ symbol will indicate which line will b e selected if the ‘Enter’ key is pressed.

When viewing certain parameters, the LCD will give a numerical reading as well as a graphical display. For example, an RSSI reading may look like this:

RSSI: -95 DBM

■■■■■■■

Figure 3.2: EX7100 Front Panel Display – RSSI Reading

3.4 Changing Parameters

This section is split into four areas:

Universal Parameters (refer to Section 3.4.1)

This section explains how to check and reconfigure certain oper ating parameters, which are generic to all EX7100 terminals, whether Data, Exchange, or Subscriber.

Data Terminal Parameters (refer to Section 3.4.2)

This section explains how to check and reconfigure certain oper ating parameters, which are specific to 64kbps Data terminals only.

Exchange Terminal Parameters (refer to Section 3.4. 3)

This section explains how to check and reconfigure the operation of certain parameters that are specific to Exchange terminals only.

Note that an Exchange terminal normally connects t o the PST N or a PABX . W hen used in conjunction with a Subscriber terminal the system provides six replacement telephone circuits.

EX7100 Technical Manual - Configuring the Terminal

Two Exchange terminals may also be configured as a 4-wire Point to Point system. In this mode, the system provides six, 4-wire trunked audio circuits with E & M wire control signalling.

Subscriber Terminal Parameters (refer to Section 3.4.4)

This section explains how to check and reconfigure the operation of certain parameters, which are specific to Subscriber terminals only.

3.4.1 Universal Parameters

Passwords.

EX7100 is protected by two levels of passwording. The Low Level password is required to access the front panel menu system and is factory

fixed as ‘1111’. This cannot be changed by the user. The High (or Second) Level password (required to change important operating

parameters) may be changed from the Exicom factory default setting of ‘1234’ to any fourdigit number.

Note 1: If the high level password is changed and the new password subsequently

forgotten, you will need to contact Exicom for a backdoor password.

Note 2: It is possible to disable either/both passwords as detailed below. It

should be noted however, that disabling the passwords will allow any unauthorised person to change the terminal’s configuration.

Changing the Second Level Password.

1) From idle, press ‘Enter’ You will be asked to enter the password. Note

this is the First Level password

which is factory fixed at ‘1111’

Use the arrow keys to enter ‘1111’, then

press ‘Enter’.

(Note: the up and down arrows increase

or decrease the number above the ↑↑↑↑ symbol)

2) Use the up and down arrow keys to make sure the →→→→ is next to Controller.

Press ‘Enter’

3) Use the up and down arrow keys to make sure the →→→→ is next to Passwords.

Press ‘Enter’

4) Use the up and down arrow keys to make sure the → is next to Change Password. Press ‘Enter’

Password ∗ ∗ 1 ∗ ↑

→Controller

RF PARAMETERS

Set Time / date

→passwords

→change password

disable lo p/word

EX7100 Technical Manual - Configuring the Terminal

4) You will be asked to enter the old Second Level password. If this is still set to the factory default value, use the arrow keys to enter ‘1234’, then press ‘Enter’

5) You will be asked for the new

Second Level password. Use the arrow keys to change the old password to the required new password and press ‘Enter’

6) You will be asked to confirm the new password. Use the arrow keys to re-enter the new Password, and press ‘Enter’

7) The new Second Level password is now set. Press ‘‘Escape’’ until the display returns to idle.

Disabling the Passwords.

1) From idle, press ‘Enter’

You will be asked to enter the password. Note

this is the First Level password

which is factory fixed at ‘1111’

Use the arrow keys to enter ‘1111’, then

press ‘Enter’.

(Note: the up and down arrows increase

or decrease the number above the ↑↑↑↑ symbol)

2) Use the up and down arrow keys to make sure the →→→→ is next to Controller.

Press ‘Enter’

3) Use the up and down arrow keys to make sure the →→→→ is next to Passwords.

Press ‘Enter’

4) Use the up and down arrow keys to make sure the → is next to ‘Disable Lo Lvl’, or ‘Disable Hi Lvl’.

Press ‘Enter’

5) You will be asked to enter the old

Second Level password. If this is still set to the factory default value, use the arrow keys to enter ‘1234’, then press ‘Enter’

6) The password has now been disabled. To re-enable the password, follow the same process.

Old p/word: 0* * * ↑

New p/word: 0* * * ↑

Confirm p/w: 0*** ↑

Password ∗ ∗ 1 ∗

↑

→Controller

RF PARAMETERS

Set Time / date →passwords

change password →Disable lo lvl

Old p/word: 0* * * ↑

EX7100 Technical Manual - Configuring the Terminal

Changing the Time and Date.

The Time and Date should be changed to reflect local settings. Note that the date f ield follows the UK format: DD/MM/YY.

1) From idle, press ‘Enter’

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to Controller.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the →→→→ is next to Set Time/Date.

Press ‘Enter’

4) The current time and date is displayed. As in the example at the start of this section, use the arrow keys to change the time and date to the required local settings and then press ‘Enter’

The new time takes effect when the ‘Enter’

key is pressed.

5) Press ‘‘Escape’’ unt il t h e display returns to idle

Password ∗ ∗ 1 ∗ ↑

→Controller

RF PARAMETERS

Operating mode →set time/date

1201:01 01/01/98 ↑

Operating Mode.

Ensure that this parameter is set to either: > Terminal 100% (link is continually up), > Terminal On Demand (link is up only with traffic), > Repeater 100% (terminal configured as a repeater transmitting continually), > Repeater On Demand (terminal configured as a repeater transmitting only with

traffic).

1) From idle, press ‘Enter’

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to Controller.

Press ‘Enter’.

3) The screen will read Operating Mode.

Press ‘Enter’

Password ∗ ∗ 1 ∗ ↑

→Controller

rf parameters

→operating mode set Time / date

EX7100 Technical Manual - Configuring the Terminal

4) Use the up and down arrow keys to choose the required operating mode and then press ‘Enter’. Note that the current setting is indicated by an asterisk.

5) Press ‘‘Escape’’ unt il t h e display returns to idle.

Link ID.

The Link ID is the identification number f or the link. There are 99 possible numbers from 1-99. (The factory default setting is 01)

Both terminals in the link must have the same Link ID setting. (If a repeater conf iguration is used, see Section 8, all

terminals must have the same link ID).

1) From idle, press ‘Enter’

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to Controller and then press ‘Enter’.

3) Use the up and down arrow keys until the →→→→ is next to Change Link ID and then press ‘Enter’.

4) Use the arrow keys to enter the required

link identification number (0-99)

Note: all term inals in a link must

have the

same Link ID (including repeaters).

Press ‘Enter’ to accept changes.

5) Press ‘Escape’ until the display returns to idle.

→terminal 100% term on demand

Password ∗ ∗ 1 ∗

↑

→Controller

rf parameters

Change password →change Link id

Link id: 01 ↑

Terminal Descriptor.

If required, a 16-character description of the terminal can be set. If changed from the factory default setting, the terminal descriptor will be displayed on the front panel while the user interface is idle, and will be displayed instead of the ESN when being accessed from a remote location.

1) From idle, press ‘Enter’ Use the arrow keys to enter the First Level

Password ∗ ∗ 1 ∗ ↑

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to Controller.

→Controller rf parameters

Press ‘Enter’.

EX7100 Technical Manual - Configuring the Terminal

3) Use the up and down arrows until the →→→→ is next to Terminal Desc. Press ‘Enter’

4) Use the keypad to set the required terminal description and then press ‘Enter’.

5) Press ‘Escape’ until the display returns to idle.

Changing the RF Channel Increment.

The EX7100 provides RF Frequency increments of either 6.25 kHz (Exicom factory default setting), or 5.0 kHz. Depending on the operating frequencies you require, it may be necessary to change this setting to the other value.

Example: If your required frequencies are not divisible by 6.25 k Hz you will need to set the channel increments to 5.0 kHz.

The procedure below is particular to a link at idle. If a link is alr eady established, or you wish to change the channel increment remotely, the ‘Change Frequency’ command must be used to action the changes. Refer to Section 4.3.3 for details.

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to RF Parameters.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the →→→→ is next to Chan Increment.

Press ‘Enter’.

4) An asterisk (*) shows which increment setting is currently in use. If required, use the up and down arrow keys to toggle between the two settings. Press ‘Enter’ to accept the change.

5) If t he current operating frequencies are incompatible with the new channel increment, the terminal will display an error message. The operating frequencies will need to be adjusted as required to suit.

6) Press ‘Escape’ until the display returns to idle.

Change link ID →terminal desc

Exicom ex7100 ↑

Password ∗ ∗ 1 ∗ ↑

Controller

→RF PARAMETERS

→chan increment

Tx frequency

→ 5 khz * 6.25 khz

Error: tx,rx not On 25khz step

EX7100 Technical Manual - Configuring the Terminal

Changing the Local Transmitter Frequency.

Ensure the Transmitter is set to operate on the required frequency.

Notes:

- This procedure is specific to a local

transmitter. To change the frequency of a

remote transmitter refer to Section 4.3.3.

- The EX7100’s front panel tuning range is limited. If a frequency change of more than 100kHz

is required, it will be necessary to manually retune some parts of the RF Section of the radio. Transmitter module re-tuning instructions are detailed in Sections 7.3.3 (VHF) and 7.4.3 (UHF). Duplexer module re-tuning instructions are given in Sections 7.9.3 (VHF) and 7.10.3 (UHF).

In addition, it may be necessary to replace the Duplexer module if a large chang e

in frequency is required. Refer Section 7.9.4 (VHF) and 7.10.5 (UHF).

Reserved Frequencies

- There are a number of internationally agreed frequencies that have been reserved exclusively for Distress and Safety Communications.

It is therefore necessary to prevent transmission on the reserved frequencies (as

well as the frequencies one channel either side of the reserved frequencies)

Affected VHF frequencies

:

156.525 MHz (± 5 or 6.25 kHz) & 156.800 MHz (± 5 or 6.25 kHz)

Affected UHF frequency

:

406.000 MHz (± 5 or 6.25 kHz)

It is not possible to enter the above frequencies during the Tx frequency change

procedure outlined below (note that this only affects the Tx frequency procedure, the Rx frequency procedure will allow selection of the frequencies but the corresponding transmitter cannot be set)

1) The local transmitter must not be transmitting. Setting the terminal to “Ondemand” operating mode will ensure the transmitter is idle as long as there is no data traffic .

From idle, press ‘Enter’ Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Controller.

Press ‘Enter’.

Password ∗ ∗ 1 ∗ ↑

→Controller

rf parameters

EX7100 Technical Manual - Configuring the Terminal

3) Use the up and down arrow keys to make sure the → is next to Operating mode.

Press ‘Enter’.

4) Use the up and down arrow keys to make sure the → is next to Term On Demand.

Press ‘Enter’. (The Tx On LED will

extinguish after 10 seconds).

5) Press ‘Escape’ to return to the main menu. Select RF parameters and press ‘Enter’.

6) Use the up and down arrow keys to make sure the →→→→ is next to Tx Frequency.

Press ‘Enter’

7) The current frequency setting is displayed. Press ‘Enter’ to change the frequency.

8) You will be asked for the Second Level password. Exicom’s factory default is ‘1234’. If the default password does not give access, see your System Engineer as the password may have been changed (refer to Section 3.4.1 for details).

9) The current frequency is displayed. Using the arrow keys, change the frequency to the required setting. Press ‘Enter’

(Note: When the cursor is under the least

significant digit, the frequency will increase/decrease by the channel spacing). The new frequency has now been set.

Press ‘Escape’ until the main menu is

displayed.

10) If required, repeat steps 3 and 4 to return the terminal to 100% operation.

Press ‘Escape’ until the menu returns to

idle.

→Operating Mode SET TIME/date

Terminal 100% →Term on demand

Controller →RF parameters

chan increment →tx frequency

Tx: 150.01275 mhz →change Freq

Password 1 ∗ ∗ ∗ ↑

Tx: 150.01275 mhz ↑

EX7100 Technical Manual - Configuring the Terminal

Changing the Local Receiver Frequency.

Ensure the Receiver is set to operate on the required frequency.

Notes:

- This procedure is specific to terminals in their idle state. To change the Rx frequency while a link is established, see 4.3.3.

- The EX7100’s front panel tuning range is limited. If a frequency change of more than 100kHz

is required, it will be necessary to manually retune some parts of the RF Section of the radio. Receiver module re-tuning instructions are detailed in Sections 7.7.3 (VHF) and 7.8.3 (UHF). Duplexer module re-tuning instructions are given in Sections 7.9.3 (VHF) and 7.10.3 (UHF).

In addition, it may be necessary to replace the Duplexer module if a large chang e

in frequency is required. Refer Section 7.9.4 (VHF) and 7.10.5 (UHF).

1) From idle, press ‘Enter’ Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to RF Parameters.

Press ‘Enter’

3) Use the up and down arrow keys to make sure the →→→→ is next to Rx Frequency.

Press ‘Enter’

4) The current frequency setting is displayed. Press ‘Enter’ to change the frequency.

5) You will be asked for the Second Level password. Exicom’s factory default is ‘1234’. If the default password does not give access, see your System Engineer as the password may have been changed (refer to Section 3.4.1 for details).

6) The current frequency is displayed. Using the arrow keys, change the frequency to the required setting. Press ‘Enter’

(Note: When the cursor is under the least

significant digit, the frequency will increment/decrement by the channel spacing).

7) Press ‘Escape’ until the menu returns to idle. The frequency change is now complete.

Password ∗ ∗ 1 ∗ ↑

Controller →rf parameters

Tx frequency →rx frequency

rx 155.01275 mhz →change freq

Password 1 ∗ ∗ ∗ ↑

rx 155.01275 mhz ↑

EX7100 Technical Manual - Configuring the Terminal

Transmitter RF Power Level.

Ensure the transmitter power level is set as required. The power level is selectable in 3dB steps (0.25W, 0.5W, 1W, and 2W for a 2Watt system, and 1.25W, 2.5W, 5W, and 10W for a 10Watt system).

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrows until the →→→→ is next to RF Parameters and then press ‘Enter’.

3) Use the up and down arrows until the →→→→ is next to Tx Power and then press ‘Enter’.

Password ∗ 1 ∗ ∗ ↑

→Rf parameters

framer

rssi →Tx power

4) The current Tx Power will be displayed. Press the down key followed by ‘Enter’ to

change the power level.

8) You will be asked for the Second Level password. Exicom’s factory default is ‘1234’. If the default password does not give access, see your System Engineer as the password may have been changed (refer to Section 3.4.1 for details).

6) The new setting is now in effect.

Press ‘Escape’ until the display returns to

idle.

Interface Type.

Check that the terminal is set for either, G.703 (Codir or Contra), Synchronous Data, Exchange, or Subscriber as required for connection to your external equipment. This may be checked on the Framer menu location.

1) From idle, press ‘Enter’

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrows until the →→→→ is next to Framer and then press ‘Enter’

Tx pwr: 2.5 W →set rf level

Password 1 ∗ ∗ ∗ ↑

Password ∗ ∗ 1 ∗ ↑

Rf parameters →framer

3) Use the up and down arrow keys to make sure the → is next to Interface and press

→interface Tx Data Clock

‘Enter.’

EX7100 Technical Manual - Configuring the Terminal

4) Use the up and down arrow keys to make sure the → is next to the required interface type. Press ‘Enter’ to accept. Note that the currently selected setting is indicated by an asterisk.

5) Press ‘‘Escape’’ unt il t h e display returns to idle.

3.4.2 Data Terminal Parameters

Transmit Data Clock Synchronisation.

For each digital interface, the 64kbps transmitted data may be synchronised to one of three options. These are:

1) Sync to Rx: Synchronise to clock from incoming data: (slave operation),

2) Ext sync clock: Synchronise to external network clock (external clock operation,

3) Internal Ref: Synchronise to EX7100 internal clock (master operation).

→ G.703 codir G.703 contra

The selection made will depend on the equipment being connected to the EX7100 terminal. Setting the clock synchronisation to ‘Sync to Rx’ will suit most applicat ions that use external equipment as the clock source (Exicom factory default setting).

Note: The six channel version of the EX7100 uses automatic internal synchronisation,

and does not need to be configured.

1) From idle, press ‘Enter’

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make

sure the → is next to Framer.

Press ‘Enter’.

3) Use the up and down arrow keys to make

sure the → is next to Tx Data Clock.

Press ‘Enter’.

4) Use the up and down arrows to select the

digital interface being used.

Press ‘Enter’.

5) Select the synchronisation source

required. Press ‘Enter’. Note that the currently selected setting is indicated by an asterisk.

6) Press ‘Escape’ until the menu returns to

idle.

Password ∗ ∗ 1 ∗ ↑

Rf parameters →framer

Interface

→Tx Data Clock

→G.703

Sync data

int ref →Sync to rx

EX7100 Technical Manual - Configuring the Terminal

Sync Data Polarity.

When using the synchronous data interface (e.g. V.35), the polarity of the clock signals may become critical to the successful interfacing of EX7100 to external devices. Many V.35 devices, especially those manufactured in North America, may have their clock and/or data signals inverted. For this reason, EX7100 allows the user to select either normal or inverted clock signals.

1) From idle, press ‘Enter’

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make

sure the → is next to Framer.

Press ‘Enter’.

3) Use the up and down arrow keys to make

sure the → is next to Tx Data Clock.

Press ‘Enter’.

4) Use the up and down arrows to select the

sync data interface.

Press ‘Enter’.

5) Use the up and down arrow keys to make

sure the → is next to Tx Polarity or Rx Polarity (as required)

Press ‘Enter’.

6) Select the polarity required. Press ‘Enter’.

Password ∗ ∗ 1 ∗ ↑

Rf parameters →framer

Interface →Tx Data Clock

G.703 →Sync data

Clock source

→tx polarity

→normal

inverted

Note: Some V.35 devices also require that the Data signals be inverted. This may be

achieved by simply swapping the (+) and (-) legs of the Tx Data and/or Rx Data connections.

EX7100 Technical Manual - Configuring the Terminal

3.4.3 Exchange Terminal Parameters

If a terminal contains an Exchange Int erface card, an Exchange menu becomes available containing the following parameters:

Operating Mode.

An Exchange terminal can be supplied to operate either with a Subscriber terminal: as a six-channel telephone system, or with another Exchange terminal: as a six-channel, trunked point-to-point, 4-wire+E&M system. The latter mode enables the user to link PABX or PSTN trunks using the E&M signal wires as control lines.

1) From idle, press ‘Enter’. Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Exchange.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the → is next to Operating Mode.

Press ‘Enter’.

4) Use the up and down arrow keys to select the mode required. Press ‘Enter’. Note that the currently selected setting is indicated by an asterisk.

5) Press ‘Escape’ to back out of the menu.

Password ∗ ∗ 1 ∗ ↑

PSU monitoring

→Exchange

→Operating mode

Channel setup

Point to point →Ex to Sub

Channel Set-up.

Each of the six telephone circuits may be set for 2-wire, or 4-wire+E&M interface, and the line impedance may be set for either 600 ohm s, 900 ohms, or complex (actual complex impedance network required must be specified: factory standard = BT3), as required by the PSTN or external device.

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Exchange.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the → is next to Channel Set-up.

Press ‘Enter’.

Password ∗ ∗ 1 ∗ ↑

PSU monitoring →Exchange

Operating mode →Channel setup

EX7100 Technical Manual - Configuring the Terminal

4) Use the keypad to position the ↑ below the channel number and use the up and down arrow keys to select the required channel.

For each channel, use the same method to

select the interface and line impedance required. Press ‘Enter’ to accept changes to each channel.

5) When all channels have been checked/set,

press ‘Escape’ to exit menu.

Payphone Metering Frequency.

If Meter Pulse payphone operation (12kHz or 16kHz) may be enabled in pairs of channels. Note that a channel with metering enabled will still operate with a standard telephone circuit. Note also that line reversal payphone detection is automatic and does not need to be configured from the front panel.

Ch:1 2W 600Ω ↑

Ch:2 4W 600Ω ↑

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Exchange.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the → is next to Metering.

Press ‘Enter’.

4) Select ‘Frequency’ to set the metering to either 12 or 16 kHz.

Select ‘Enable’ to turn on the metering

facility for each channel.

NB: All channels can be turned on or off by

selecting ‘ALL’.

5) When all channels have been checked/set,

press ‘Escape’ to exit menu.

Password ∗ ∗ 1 ∗ ↑

PSU monitoring →Exchange

Channel setup

→Metering

→Frequency

enable

EX7100 Technical Manual - Configuring the Terminal

Transmit Audio Line Level.

For each channel, the transmit audio line level is selectable in 0.5dB steps from

-15dBm to +3dBm.

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Exchange.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the → is next to Tx Level.

Press ‘Enter’.

4) Use the keypad to set the required Tx audio

line level for each channel. Press ‘Enter’ to accept changes for each channel.

NB: All channels may be set to the same

value by selecting ‘ALL”.

(Note: Within a terminal the Tx line level

should not be set lower than the Rx line level. For typical applications with short telephone cable runs, a Tx line level of 0dBm is recommended)

5) Press ‘Escape’ to back out of the menu.

Password ∗ ∗ 1 ∗ ↑

PSU monitoring →Exchange

Metering →tx level

Ch: 1 lv: 0 dBm ↑

Receive Audio Line Level.

For each channel, the received audio line level is selectable in 0.5dB steps from

-15dBm to +3dBm.

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Exchange.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the → is next to Rx Level.

Press ‘Enter’.

Password ∗ ∗ 1 ∗ ↑

PSU monitoring →Exchange

Tx level →rx level

EX7100 Technical Manual - Configuring the Terminal

4) Use the keypad to set the correct Rx audio line level for each channel. Press ‘Enter’ to accept changes for each channel.

NB: All channel may be set to the same

value by selecting 'ALL’.

(Note: Within a terminal the Rx line level

should not be set higher than the Tx line level. For typical applications with short telephone cable runs, an Rx line level of

–3dbm is recommended)

3.4.4 Subscriber Terminal Parameters.

If a terminal is configured as a Subscriber Terminal, the following parameters should be checked:

Ringer Frequency.

The EX7100 is able to be configured to provide either 18Hz or 25Hz ringing frequency.

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Subscriber.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the → is next to Ring.

Press ‘Enter’.

4) Use the up and down arrow keys to select the ringing frequency required. Press ‘Enter’. Note that the currently selected setting is indicated by an asterisk.

5) Press ‘Escape’ to back out of the menu.

Ch: 1 lv: 0 dbm ↑

Password ∗ ∗ 1 ∗ ↑

PSU monitoring

→Subscriber

→ring

termination

→18hz 25hz

Line Termination Impedance.

Each of the six channels may have a line impedance of 600Ω, 900Ω, or complex (actual complex impedance network must be specified: factory standard = BT3).

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

Password ∗ ∗ 1 ∗ ↑

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Subscriber.

PSU monitoring →Subscriber

Press ‘Enter’.

EX7100 Technical Manual - Configuring the Terminal

3) Use the up and down arrow keys to make sure the → is next to Termination.

Press ‘Enter’.

4) Use the keypad to set the line impedance

for each channel. Press ‘Enter’ to accept changes for each channel.

NB: All channels may be set the same by

selecting 'ALL’.

5) Press ‘Escape’ to back out of the menu.

Payphone Metering Frequency.

As for the Exchange Terminal, check that the correct payphone metering frequency is selected (12 kHz or 16 kHz) for each channel pair. Note that line reversal detection is automatic and does not need to be configured.

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Subscriber.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the → is next to Metering.

Press ‘Enter’.

4) Select ‘Frequency’ to set the metering to either 12 or 16 kHz.

Select ‘Enable’ to turn on the metering

facility for each channel.

NB: All channels can be turned on or off by

selecting ‘ALL’.

5) Press ‘Escape’ to back out of the menu.

Ring →termination

Ch: 1 600 Ω ↑

Password ∗ ∗ 1 ∗ ↑

PSU monitoring →Subscriber

termination →Metering

Frequency

→

Enable

Transmit Audio Line Level.

For each channel, the transmit audio line level is selectable in 0.5dB steps from

-15dBm to +3dBm.

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

Password ∗ ∗ 1 ∗ ↑

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Subscriber.

PSU monitoring →Subscriber

Press ‘Enter’.

EX7100 Technical Manual - Configuring the Terminal

3) Use the up and down arrow keys to make sure the → is next to Tx Level.

Press ‘Enter’.

4) Use the keypad to set the required Tx audio line level for each channel. Press ‘Enter’ to accept changes for each channel.

NB: All channels may be set to the same

value by selecting ‘ALL’.

(Note: Within a terminal, the Tx line level

should not be set lower than the Rx line level. For typical applications with short telephone cable runs, a Tx line level of 0dBm is recommended.)

5) Press ‘Escape’ to back out of the menu.

Receive Audio Line Level.

For each channel, the received audio line level is selectable in 0.5dB steps from

-15dBm to +3dBm.

1) From idle, press ‘Enter’.

Use the arrow keys to ‘Enter’ the First

Level password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Subscriber.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the → is next to Rx Level.

Press ‘Enter’.

4) Use the keypad to set the correct Rx audio line level for each channel. Press ‘Enter’ to accept changes for each channel.

NB: All channels may be set to the same

value by selecting ‘ALL’.

(Note: Within a terminal, the Rx line level

should not be set higher than the Tx line level. For typical applications with short telephone cable runs, an Rx line level of 3dBm is recommended.)

5) Press ‘Escape’ to back out of the menu.

metering →tx level

Ch: 1 lv: 0 dBm ↑

Password ∗ ∗ 1 ∗ ↑

PSU monitoring →Subscriber

Tx level →rx level

Ch: 1 lv: 0 dbm ↑

EX7100 Technical Manual - Configuring the Terminal

Telephone Loop Current.

If the telephone cabling is excessively long, the loop current may need to be increased to provide extra microphone and ringing current. The loop current m ay be set t o either 25mA or 45mA, but should be left at 25mA if cabling is short.

1) From idle, press ‘Enter’

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the → is next to Subscriber.

Press ‘Enter’.

3) Use the up and down arrow keys to make sure the → is next to Loop Current.

Press ‘Enter’.

4) Use the keypad to set each channel to the loop current required. Press ‘Enter’ to accept changes for each channel.

NB: All channels may be set to the same

value by selecting ‘ALL’.

5) Press ‘Escape’ to back out of the menu.

Password ∗ ∗ 1 ∗ ↑

PSU monitoring →Subscriber

Rx Level →loop current

Ch: 1 25 ma ↑

EX7100 Technical Manual - Configuring the Terminal

Exicom EX7100

Time Date

Enter Password

Controller

RF Parameters

Framer

PSU Monitoring

(X)

Mux Card

Remote Tests

Alarms

Operating Mode

Set T ime / Da te

Passwords

Change Li nk ID

Terminal Desc

ESN

S/W Ver sion

Align Mode

Start Tests

End Remote Tests

Change Freqs

Current Al arms

Alar m Log

Alar m Pri orities

Link Up Time

Ter mi nal 100%

Term On De m and

Repeater 100%

Rptr On De mand

RSSI

Tx Po w e r

Chan Incr ement

Tx Frequency

Rx Frequency

Tx Temperature

Loop Volts

Refer 4.3.1 Setti ng up a

Test Link

VSWR Alarm

Tx Powe r Drop

Low RSSI

Synth Loss

BER

Mode m L o c k

I/P Volts Fault

Int. Rail Fau lt

5kHz 6.25kHz

Interface

Tx Data Clock

Loopback

List of ESNs

Antenna Al i gn

BER

Off

1 Hr

3 Hrs

6 Hrs

9 Hrs

12 Hr s

18 Hr s

24 Hrs

Inpu t Voltage

+24 VDC Rail

+15 VDC Ra il

-15 VDC Ra il

+5 VDC Raill

-5 VDC Rail

Char ge Curr ent

Input Current

G703 Codi r

G703 Contra

Sync Data

Subscri ber

Exchange

G703

Sync Da ta

Local

Remote

Starti ng remote menu

session

(X)

Inter nal Ref

Sync to Rx

Ext Sync Clk

Clock So u rce

Tx Pola rity

Rx Polarity

Controller

RF Parameters

Framer

PSU Monitori ng

(X)

Mux Card

Alar ms

See Page 2 if Internal M ux card is fitted.

Operating Mode

Set Time/Date

Change Li nk ID

Terminal Desc

ESN

S/W Version

Current A larms

Alar m Log

Alarm Pri orities

Link Up Time

Termi nal 100%

Term On De ma n d

Repeater 100%

Rptr On De ma n d

RSSI

Tx Power

Chan Increment

Tx Frequency

Rx Frequency

Tx Temperature

Loop Volts

Interface

Tx Data Clock

BER

Loopback

VSWR Al ar m

Tx Powe r Drop

Low RSSI

Synth Loss

BER

Modem Lock

I/P Volts Fault

Int. Ra il Fault

5kHz 6 .2 5 k Hz

G703 Codi r

G703 Contra

Sync Data

Subscri ber

Exchange

G703

Sync Data

Local

Remote

Off

1 Hr

3 Hrs

6 Hrs

9 Hrs

12 Hrs

18 Hrs

24 Hrs

Inter nal Ref

Sync to Rx

Ext Sync Clk

Clock S o urce

Tx Pola rity

Rx Polarity

Inpu t Voltage

+24 VDC Raill

+15 V DC Ra il

-15 VDC Rail

+5 VDC Ra ill

-5 VDC R ail

Char ge Curr ent

Input Current

EX7 100 System User M enu F low diagram (P age 1 of 2)

EX7100 Technical Manual - Configuring the Terminal

Point to P o int

Exchange

(X)

Subscr i ber

(X)

See Page 1 fo r main me n u location.

(X)

Operati ng Mode

Channel Setup

Metering

Tx Leve l

Rx Level

Loopback

Ring

Termination

Metering

Tx Leve l

Rx Level

Loop Cur rent

Loopback

Ex to S u b

Ch: 1 2 W 6 0 0

Ch: 1 & 2 O ff

Ch: 1 L vl: 0 d B

Ch 1 L vl: 0 d B

Ch: 1 O ff

Ch: 1 T e rm: 6 0 0

Ch: 1 & 2 O ff

Ch: 1 L vl: 0 d B

Ch: 1 25 mA

Ch: 1 O ff

Ω

18 Hz

25 Hz

Ω

EX7100 System User Menu Flow diagram (Page 2 of 2)

EX7100 Technical Manual – Monitoring and Diagnostics

4.1 General

The EX7100 is equipped with a powerful monitoring and diagnostic system that may be accessed using the six button keypad and LCD on the front panel. (Refer to Section 3.2 for information on how to use the Front Panel User Interface).

The front panel also has four LED's that indicate the operating status of the terminal, as well as any alarms being generated by the terminal.

It is possible, via the front panel, to view how t he terminal is configured (refer to Section

3), monitor various operating parameters (Refer to Section 4.2), and set up the terminal to generate and log alarms for those parameters that may potentially cause link failure.

4

Monitoring and diagnostics

This facility also allows the user to access any remote terminals within the local terminal’s RF path. (Refer to Section 4.3 Monitoring a Remote Terminal). With the addition of the optional ELMS (Exicom Link Management System) software, monitoring of multiple terminals is possible (Refer to Appendix B.1).

4.2 Monitoring the EX7100’s Operation

The EX7100 User Interface allows the user to monitor the operation of the various modules that make up the radio terminal.

This Section details the monitoring method for various parameters as follows:

Note: Many of the instructions listed are similar to the configuration instructions

previously given in Section 3. It is possible to view having to actually change

4.2.1 RF Parameters

> Channel Increment > Tx Frequency > Rx Frequency > Tx Power

it.

a changeable parameter without

> Tx Temperature (Displays the temperature of the Power Amplifier heatsink) > RSSI > Synthesiser Loop Volts (Displays the loop voltage of the Rx and Tx frequency

synthesisers – Refer RF alignment within Section 7 as required.

EX7100 Technical Manual – Monitoring and Diagnostics

1) From idle, press ‘Enter’. Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrows until the →→→→ is next to RF Parameters and then press ‘Enter’.

3) Use the up and down arrows to position the →→→→ next to the required parameter and then press ‘Enter’ to view.

4) Press the ‘Escape’ key to back out of the menu system. Pressing ‘Escape’ three times will return the display to idle.

4.2.2 Power Supply Parameters

The power supply provides the monitoring system with the status of all voltage rails, as well as DC input voltage and Input current drawn.

Password ∗ ∗ 1 ∗ ↑

→rf parameters framer

RSSI →tx power

> +5 VDC Rail > -5 VDC Rail > +15 VDC Rail > -15 VDC Rail > +24 VDC Rail > DC Input Voltage > Input Current > Charge Current.

1

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrows until the →→→→ is next to PSU Monitoring and then press ‘Enter’.

3) Use the up and down arrows to position the →→→→ next to the required parameter and then press ‘Enter’ to view.

4) Press the ‘Escape’ key to back out of the menu system.

Password ∗ ∗ 1 ∗ ↑

framer →psu monitoring

+5 VDC rail →-5 VDC Rail

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Requires an external shunt to operate. The shunt is not supplied as standard, it will need to be purchased separately.

EX7100 Technical Manual – Monitoring and Diagnostics

4.2.3 Framer Parameters

> Bit Error Rate (BER)

1) From idle, press ‘Enter’.

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to Framer and then press ‘Enter.’

3) Use the up and down arrows until the →→→→ is next to BER and then press ‘Enter’.

Password ∗ ∗ 1 ∗ ↑

RF parameters →framer

Tx Data Clock →ber

4) The value of BER is displayed. Press ‘Enter’ to change the BER Alarm trigger point.

5) Press the ‘Escape’ key to back out of the menu system.

4.3 Monitoring a Remote Terminal

From any terminal, it is possible to access the conf iguration, monitoring and diagnostics system of any other terminal in the RF path.

Example (1) A two terminal link.

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EXICOM

EX7100

Local Terminal

Example (2) A link with a repeater.

EXICOM

Local Terminal

Data or Six Channel Two Data Terminals strapped as Repeaters Data or Six Channel

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EX7100

o o o o o o

EX7100

o

o o

o

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EX7100

Figure 4.1: Two Terminal Link

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EX7100

EXICOM

EX7100

Data

Terminal

Figure 4.2: Two Terminal link with Repeater Terminal

EXICOM

Ber: <1 x10E →set alarm point

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EX7100

Data

Terminal

-6

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EX7100

EXICOM

EX7100

Remote Terminal

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EXICOM

EX7100

Remote Terminal

EX7100 Technical Manual – Monitoring and Diagnostics

4.3.1 Setting Up a Test Link

To perform remote monitoring it is necessary to set up a Test Link with the terminal to be interrogated, even if a link is alr eady established due to normal traff ic. A test link ensures that the radio link remains in place irrespective of whether there is traffic or not.

Refer to the menu tree diagram at the end of Section 3. Following the path: Enter Password→Remote Tests→Start Tests→

• If a link is already established due to user traffic:

There will be a short delay while the

system checks for other terminals in the RF path

1) A list of terminal ESNs

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or terminal descriptors (if set) found will be displayed with the closest terminal at the top of the list. Choose the required terminal and then press ‘Enter’

→ please wait getting chain

→ 12345678 23456789

• If a link is not already established:

1a) If any Link IDs in the path are unknown,

a Test Link can be established by selecting Ignore Link ID: and then pressing ‘Enter’.

1b) If all Link IDs in the path are known, a

Test Link can be established by selecting Use Link ID: and then pressing ‘Enter’.

2) The link will take a few seconds to establish a link.

3) A list of terminal ESNs

1

or terminal descriptors (if set) found will be displayed with the closest terminal at the top of the list. Choose the required terminal and then press ‘Enter’

The menu now displays the main menu of the remote terminal. All monitoring, diag nostic, and configuration parameters are now available for that terminal. The menu layout looks identical to that of a local terminal menu.

→ ignore link id use link id:xx

Ignore link id → use link id: xx

Please wait Setting up link

→ 12345678 23456789

1

If a terminals Terminal Descriptor has been changed from default (Refer to Section 3.4.1) it will be displayed instead of

the terminal’s ESN.

EX7100 Technical Manual – Monitoring and Diagnostics

Note 1: If the remote terminal is unable to be contact ed, due to a faulty link or if another

user is accessing the terminal, a message will be displayed:

Couldn’t contact Remote terminal

Note 2: When accessing a remote menu there will be a short delay between pressing a

key and the menu changing, due to the limited data speed of the engineering channel.

4.3.2 Closing the Test Link

When you have finished the remote interrogation, you should close down the test link, even if the link was already established (with data or telephone t raffic). If a test link is not closed down manually it will be shut down automatically after 10 minutes.

1) Press the ‘Escape’ key until the menu display is as shown. Use the up and down

Start tests →end remote tests

arrow keys to make sure the →→→→ is next to End Remote Tests and then press ‘Enter’.

2) If there is no telephone or dat a traffic using the system, the EX7100 will close down the link (both the Tx and Rx LED’s will go out).

If there is telephone or data traffic using the system, the EX7100 will close down the test

link, but the link will continue to operate (both the Tx and Rx LED’s will remain on).

3) Press ‘Escape’ until the display returns to idle.

Important Note:

While a terminal is being remotely accessed, it will not be able to be accessed locally. The remote terminal display will read:

Remote access Keyboard locked

4.3.3 Changing Operating Frequencies Remotely

As previously discussed in Section 3.4.1, it is possible to configure an EX7100 terminal remotely, with the process being identical to configuring a local terminal.

There is however, a slight change in process when changing the Operating Frequencies or Channel Increment remotely, or locally with a link established.

Consider a link operating on Tx 450.000 MHz and Rx 455.000 MHz, with a requirement to change this to Tx 450.050 MHz and Rx 455.050 MHz.

If we followed the procedure outlined in Section 3.4.1 for an idle terminal, the local terminal’s frequencies would change but there would be no means of setting up a link with the remote terminal, as the new local frequencies would no longer match the remote terminal’s frequencies.

EX7100 Technical Manual – Monitoring and Diagnostics

Therefore, we would be unable to change the remote terminal’s frequencies unless we visited the remote site. Similarly, if it were possible to change the remote terminals frequencies, and an error was made in doing so, it would not be possible to remotely access the terminal to amend the error.

For this reason, the EX7100 has a ‘smart’ Change Frequency command. If it is necessary to change the frequencies of a working link, this procedure must be used.

This command allows the user to enter the new frequencies of all t he terminals in the RF path, and then issue the command to change them all simultaneously. I f the link is unable to be established on the new frequencies, the system automatically returns the link to the original frequencies.

Important Note: The EX7100’s front panel tuning range is limited. If a frequency change of more

than 100kHz is required, it will be necessary to manually retune some parts of the RF Section of t he radio.

Transmitter module re-tuning instructions are detailed in Sections 7.3.3 (VHF) and

7.4.3 (UHF). Receiver module re-tuning instructions are detailed in Sections 7.7.3 (VHF) and 7.8.3 (UHF). Duplexer module re-tuning instructions are given in Secti ons

7.9.3 (VHF) and 7.10.3 (UHF). In addition, it may be necessary to replace the Duplexer module if a large change in

frequency is required. Refer Sections 7.9.4 (VHF) and 7.10.5 (UHF). Procedure:

A) Use the procedure detailed in Section 4.3.1 ‘Setting Up a Test Link’, to gain access to

the remote terminal’s menu system.

B) Use the procedure detailed in Section 3.4.1 ‘Changing the Local Transmitter

Frequency’ (steps 2-9), to change the remote terminal’s Tx frequency.

Note: Although the new frequency will be displayed, it will not actually change until the

Change Frequency command is given.

C) Use the procedure detailed in Section 3.4.1 ‘Changing the Receiver Frequency’, to

change the remote terminal’s Rx frequency.

Note: Althoug h the new frequency will be displayed, it will not actually change until the

Change frequency command is given.

D) If the link contains a repeater

, press the ‘Escape’ key until the list of terminal ESNs is displayed. Select the most remote repeater terminal and repeat st eps B and C. Press the ‘Escape’ key until the list of terminal ESNs is displayed. Select the other repeater terminal and repeat steps B and C.

If the link does not contain a repeater, ignore this step. E) Press the Escape key to back through the menu. F) Use the up arrow key to make sure the →→→→ is next to RF Parameters, and press

‘Enter’.

EX7100 Technical Manual – Monitoring and Diagnostics

G) Repeat steps B and C. This will enter the Local Terminal’s new frequencies. H) Repeat step E. I) Use the down arrow key to make sure the →→→→ is next to Remote Tests. Press ‘Enter’. J) Use the down arrow key to make sure the →→→→ is next to Change Freqs. Press ‘Enter’. K) Enter the Second Level Password and press ‘Enter’.

The link will shut down briefly, and then attempt to set-up a link using the new frequencies. If it is successful, the link will continue to operate using the new frequencies. If it is unable to set-up a link (i.e. one or more frequencies is incompatible) the link will again shut down briefly, then set-up the link using the old frequencies.

Note: If the frequency change is successful, the following message is displayed:

Change freqs ok. Using new freqs

This message refers only to the local RF hop. If a multi-hop frequency change has

been attempted it is recommended that the user access the terminals again, to check that the new frequencies are correct.

If the frequency change is unsuccessful, the following message is displayed:

Change freqs fail. Using old freqs

The procedure will need to be repeated. Note: Any traffic using the link during a Change Frequency command will be lost.

L) Use the Close Link procedure detailed in Section 4.3.2 to close down the Test Link.

4.4 EX7100 Internal Alarms

The EX7100 terminal generates the following internal alarms: > Input Voltage (DC input voltage out of range: approx. 5% from shutdown voltages) > Low RSSI (Adjustable alarm set point, refer to Section 4.4.4) > Tx Power Drop (3dB drop below current menu setting) > High VSWR > High BER (Adjustable alarm set point, refer to Section 4.2.3) > Modem Lock (Modems not synchronised) > Synth Loss (Rx or Tx frequency not locked) > Link Up Too Long > Link Failed (Locally generated link failure)

EX7100 Technical Manual – Monitoring and Diagnostics

> Internal Voltage Rails (Internal voltage rails out of range: approx. ± 10%) > Over Temperature Alarm (UHF 10 Watt system only, activates if Heatsink

temperature exceeds 60°C)

The user is able to assign either a high or a low priority to each of these alarms. When a high priority alarm occurs, an opto-isolated output closes. When a low priority alarm occurs, a second opto-isolated output closes. In either case, an alarm message is sent out of the LMS port.

If a high priority alarm is triggered, a link set-up is attempted (if a link is not already in place) and the alarm transported to the remote end. At the remote end, and any intermediate repeater sites, the high priority output is act ivated and an alarm message is sent out to the LMS port. At any site, the user is able to scroll through active local and remote alarms via the front panel LCD.

When any alarm event occurs, local or remote, the alarm LED on the front panel flashes red. When the user acknowledges the alarm using the front panel, the LED stops flashing but continues to glow red.

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4.4.1 Acknowledging an Alarm

To acknowledge an alarm, follow the menu path: Enter Password→Alarms→Current Alarms

Use the up and down arrow keys to scroll through the current alarms until t he new alarm is displayed. This is recognisable by the flashing * in the bottom left corner.

Press ‘Enter’ to acknowledge the alarm.

When the alarm clears, the front panel LED extinguishes. If more than one alarm is present at one time, the above conditions apply until all alarms are acknowledged, and then cleared.

Alarm events (either activating or clearing of any local or remote alarm) are stored in a log. Each entry includes a time and date stamp. The user is able to scroll through the alarm log.

Note: The alarm log can hold 32 events. W hen the alarm log is full, the oldest alarm is

overwritten. In the event of a power failure, the alarm log will be lost.

4.4.2 Setting Alarm Priorities

To set Alarm Priorities (high or Low), follow the menu path:

Local alarm ‘*’ Low RSSI

Note: To view the time and date stamp of the alarm toggle the left or right arrow key.

Enter Password→Alarms→Priorities

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Any remote alarm(s) will be cleared whenever the link closes down, either by a user-action or a link failure.

EX7100 Technical Manual – Monitoring and Diagnostics

1) Press ‘Enter’. You will be given a list of all alarms available within the terminal

2) Use the up and down arrow keys to select

the alarm you wish to set and then press ‘Enter’ to select.

3) The asterisk (*) indicat es which priority is set for that alarm. Use the left and right arrow keys to change the priority and then press ‘Enter’ to accept the change.

4) Continue t o check/set the priorities for each alarm and then press ‘Escape’ until the display returns to idle.

4.4.3 Link Up Time Alarm

The EX7100 provides an alarm to indicate when the link has been up longer than the set time limit. This may be useful in the case where a site is battery/solar powered and it is necessary to know if the link is being held up for any reason.

The Link Up Time Alarm may be set for the following times: Off, 1 Hour, 3 Hours, 6 Hours, 9 Hours, 12 Hours, 18 Hours, 24 Hours.

Alarm Log → Priorities

Low RSSI →Tx Power drop

Tx power drop * low High

To set the Link U p Time Alarm:

1) From idle, press ‘Enter’ Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to Alarms and then press ‘Enter’

3) Use the up and down arrow keys to make sure the →→→→ is next to Link Up Time and then press ‘Enter’.

4) Use the up and down arrow keys to choose the required alarm time and then press ‘Enter’ to accept.

Note that the currently selected option is

indicated by an asterisk.

5) Press ‘Escape’ until the display returns to idle

Password ∗ ∗ 1 ∗ ↑

Remote tests →Alarms

Priorities →Link up time

Off →1 hour

EX7100 Technical Manual – Monitoring and Diagnostics

4.4.4 Low RSSI Alarm

The user may set an RF level (-40 dBm to -106 dBm) at which the Low RSSI Alarm will trigger. To set this trigger point:

1) From idle, press ‘Enter’ Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys until the →→→→ is next to RF Parameters and then press ‘Enter’

3) Use the up and down arrow keys to position the →→→→ next to RSSI and then press ‘Enter’.

4) Press the down arrow key then press

‘Enter’.

5) Use the up and down arrow keys to

select the required alarm trigger point, then press ‘Enter’.

The currently selected setting is indicated by an asterisk.

6) Press ‘Escape’ until the display returns to idle

Password ∗ ∗ 1 ∗ ↑

→rf parameters

framer

→RSSI Tx power

Rssi : -75dbm →set alarm point

* -100 dbm →-98 dbm

4.4.5 Over Temperature alarm

The UHF 10 Watt system requires fan assisted cooling, due to the extra heat generated by the power amplifier. Two fans are controlled by the transmitter CPU. If the heatsink temperature exceeds 45°C one fan will be turned on.

Every 40 hours (approx) the CPU will switch between the two fans to ensure an even lifecycle. If the heatsink temperature continues to rise above 55°C, bot h fans will be turned on simultaneously. If the heatsink temperature exceeds a maximum permitted level of 60°C, normally due to a total fan failure, an alarm will be generated.

4.5 Diagnostic Tools

4.5.1 System Align Mode

To enable the user to retune the EX7100’s RF section with the minimum of external test equipment, the terminal may be put into an Align Mode.

In this mode, the internal modem is set to output fixed data patterns, with a constant AGC level, and the transmitter is keyed on. The user is then able to retune the Transmitter module as per the instructions in Section 7.

Note: Two modes can be used to retune the RF Modules.

EX7100 Technical Manual – Monitoring and Diagnostics

The ‘CW’ mode provides a carrier output only. This enables the user to verify the transmitter operating frequency using a standard frequency counter.

The ‘DSBSC’ mode provides a double side band, suppressed carrier output, to enable the user to adjust the transmitter carrier null, and also to measure Transmitter RF Power (PEP).

1) Align Mode cannot be accessed if the link is established or the Transmitter is on. Ensure this is not the case by setting the Terminal’s Operating Mode to “Ondemand”.

2) From idle, press ‘Enter’ Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

3) Use the up and down arrow keys to make sure the →→→→ is next to Controller and then press ‘Enter’

4) Use the up and down arrow keys to make sure the →→→→ is next to Align Mode and then press ‘Enter’.

5) Use the keypad to select the required modulation and Tx power level, then press ‘Enter’.

6) Press ‘Escape’ to disable and exit out of Align Mode.

Password ∗ ∗ 1 ∗ ↑

→Controller

Rf Parameters

S/w version

→Align Mode

→mod: ∗ cw dsbsc tx: ∗ low norm

Key: MOD = Modulation. CW = Carrier only. DSBSC = Double side band at +/- 8kHz from carrier. Tx = Transmit power level. Low = Set to lowest menu setting. Normal = Set to current user setting.

4.5.2 Digital Loopbacks

The EX7100 is able to loopback the 64kbps digital data in the following configurations:

Transmit Data

Local Loopback

Received Data

Framer

Figure 4.3: Digital Loopback Configurations

EX7100

RF Section

Received RF

Remote Loopback

Transmit RF

EX7100 Technical Manual – Monitoring and Diagnostics

Local Loopback

In Local loopback mode, the transmit 64kbps digital data stream, from the user interface, is looped within the framer to the receive 64kbps digital data stream, back to the user equipment. This enables the user to check the interface between the EX7100 and the user equipment.

Notes: Local loopback operates for both G.703 and Synchronous Data inputs.

Remote Loopback

In Remote Loopback mode, the received RF into the EX7100 terminal is looped to the transmit RF line. This enables the user to check the radio path of the system.

Both loopbacks can be enabled for the local terminal as well as the remote terminal.

Enabling Digital Loopbacks

1) From idle, press ‘Enter’. Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to Framer and then press ‘Enter’.

3) Use the up and down arrow keys to make sure the →→→→ is next to Loopback and then press ‘Enter’.

4) Use the up and down arrow keys to choose the required loopback and then press ‘Enter’.

5) Use the keypad to enable the loopback function.

Password ∗ ∗ 1 ∗ ↑

RF parameters →framer

ber →loopback

local →remote

off →on

Note: Ensure that the loopback mode is disabled when testing is completed. Warning: Digital loopbacks should only be used with the system set for G.703 or V.35

(sync data) input. Do not attempt to use the digital loopbacks when the EX7100 interface is set to Exchange or Subscriber. Doing this may cause the subscriber telephones to ring continuously.

EX7100 Technical Manual – Monitoring and Diagnostics

4.5.3 Analogue Loopbacks

The six channel telephone version of the EX7100 is equipped with the ability to loop back the audio on each of the six analogue lines. This f unction is done within the digital audio processing section of the line interface card and therefore is transparent to the interface confi guration (2-wire or 4- wire+E&M).

LINE 1…6

Figure 4.4: Analogue Loopback Configurations

DSLAC

LOCAL LOOPBACK

REMOTE LOOPBACK

DSPs

Local Loopback

Each channel may be put into local loopback mode from the front panel of the EX7100 terminal. In this mode, the transmit audio (into the EX7100 terminal) is looped back to the received audio (out of the terminal), within the DSLAC (Dual Subscriber Line Audio Circuit) device.

The user is now able to send an analogue signal into the radio and monitor it across the same line (using a suitable test instrument with built in hybrid network). It is possible to perform a similar test using a standard telephone connected to the line, but due to echo cancellation effects, the received audio will sound distorted.

This feature enables a technician to confirm that the EX7100 line interface circuitry is operating correctly.

Remote Loopback

Each analogue channel may be put into remote loopback mode from the front panel of the EX7100. In this mode, the received audio from the remote t erminal is looped back to the transmit audio path.

From the remote terminal, a technician is able t o send a signal down the line and monitor it from the same location (using suitable test equipment with built in hybrid network).

EX7100 Technical Manual – Monitoring and Diagnostics

This feature allows a technician to distinguish whether a fault is within the radio equipment, or on the external telephone line.

Enabling Analogue Loopbacks

1) From idle, press ‘Enter’ Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to Exchange/Subscriber and then press ‘Enter’

3) Use the up and down arrow keys to make sure the →→→→ is next to Loopback and then press ‘Enter’.

4) Use the keypad to set the required channel to the required loopback mode and then press ‘Enter’ to accept.

5) Press ‘Escape’ until the display returns to idle

Password ∗ ∗ 1 ∗ ↑

Psu monitoring →Subscriber

Loop current →loopback

Ch: 1 off ↑

Note: During loopback testing the channel is not available to user traffic. Ensure that the

loopback mode is disabled when testing is complete.

4.6 Bit Error Rate Testing

4.6.1 General

At some time after installation of the EX7100, the user may wish to perform a bit error rate test in order to confirm that the system is operating correctly.

A BER test may be performed on both configurations of EX7100: 64kbps data or telephone.

Testing of a telephone system is possible by performing the test at the 64kbps digital level using the G.703 or Synchronous data interface.

There are a number of levels of BER testing that may be performed on the EX7100 to enable the user to pin-point the location of a potential fault.

A) End-to-End one direction test: This requires a Bit Error Rat e Tester (BERT) at both

ends of the link.

B) Full round-trip test: This may be perf ormed using a single BERT (capable of sending

and receiving simultaneously) utilising the remote digital loopback feature of the EX7100.

C) Local Interface test: As per B) above, but utilising the local loopback feature of the

local EX7100 terminal.

It should be noted that the results obtained from a round trip test will produce a BER twice that of a single direction test.

EX7100 Technical Manual – Monitoring and Diagnostics

Important Note:

During the BER test, the radio link will not be available to normal traffic.

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BE R T BE R T

EXICOM

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EX7100

EX7100 EX7100

EXICOM

Bit error rate tester set to transmit.

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EX7100

Bit error rate tester set to receive.

Figure 4.5: End-to-End Bit Error Rate Test

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BE R T

Bit error rate tester set to

EXICOM

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EX7100 EX7100

EX7100

EXICOM

EX7100 set for remote loopback

transmi t and receive.

Figure 4.6: Round-Trip Bit Error Rate Test

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BE R T

Bit error rate tester set to

EXICOM

EX7100 set for local loopback

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EX7100

transmi t and receive.

Figure 4.7: Local Interface Bit Error Rate Test

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EX7100

4.6.2 BER Testing an EX7100: End-to-End

A) Connect the BERT equipment to the digital interface port of both EX7100 terminals

(G.703, or Sync Data) as required. B) Set the sending BERT equipment to provide the clocking source for the test. C) Set the interfaces of both EX7100 terminals to match the interface of the BERT

equipment - G.703 or V.35 (sync data) - as follows:

1) From idle, press ‘Enter’ Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrows until the →→→→ is next to Framer and then press ‘Enter’

3) Use the up and down arrow keys to make sure the → is next to Interface and press ‘Enter.’

Password ∗ ∗ 1 ∗ ↑

Rf parameters

→framer

→interface

Tx Data Clock

EX7100 Technical Manual – Monitoring and Diagnostics

4) Use the up and down arrow keys to make sure the → is next to the required interface type. An ∗ indicates the current interface.

Press ‘Enter’ to accept.

5) Press ‘Escape’ once to return to the previous menu.

D) Set the EX7100 terminals so that the Transmitted data is clocked from the received

data stream, as follows:

1) Use the up and down arrow keys to make

sure the → is next to Tx Data Clock.

Press ‘Enter.’

2) Use the up and down arrows to select the

digital interface being used.

Press ‘Enter.’

3) Select the synchronisation source

required.

Press ‘Enter.’

4) Press ‘Escape’ until the main menu is

displayed.

→G.703 codir G.703 contra

Interface

→Tx Data Clock

→G.703

Sync data

int ref →Sync to rx

E) Set both EX7100 terminals to 100% operation as follows:

1) Use the up and down arrow keys to make sure the →→→→ is next to Controller.

Press ‘Enter.’

2) The screen will read Operating Mode.

Press ‘Enter’

3) Use the up and down arrow keys to choose Terminal 100%, and press ‘Enter’

4) Press ‘Escape’ until the display returns to idle.

F) The BER test may now begin. When complete, return each terminal to its original

configuration.

→controller rf parameters

→operating mode set Time / date

→terminal 100% term on demand

EX7100 Technical Manual – Monitoring and Diagnostics

4.6.3 BER Testing an EX7100: Round-Trip

A) Connect a BERT, set to send and receive simultaneously, to the local EX7100

terminal.

B) Follow steps B-E above to set the EX7100 terminals for the correct interface, clock

sync, and 100% operation.

C) Set the remote EX7100 terminal to Dig ital Rem ote Loopback mode by fir st setting up

a remote test link and accessing the remote terminal (refer to Section 4.3.1) then following the procedure below:

1) From idle, press ‘Enter’

Use the arrow keys to enter the First Level

password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrow keys to make sure the →→→→ is next to Framer and then press ‘Enter’

3) Use the up and down arrow keys to make sure the →→→→ is next to Loopback and then press ‘Enter’.

4) Use the up and down arrow keys to choose the required loopback and then press ‘Enter’.

5) Use the keypad to turn the loopback function on.

Password ∗ ∗ 1 ∗ ↑

RF parameters →framer

ber →loopback

local →remote

off →on

D) The BER test may now begin. Remember to disable the loopback, close the t est link,

and return the EX7100 terminals to their original configurations when finished.

4.6.4 BER testing an EX7100: Local Interface.

A) Connect a BERT, set to send and receive, to the local EX7100 terminal. B) Set the EX7100 terminal to the correct interface and clock sync using the steps in

Section 4.6.2.

C) Using the instructions given earlier as a guide, set the EX7100 terminal to Digital

Local Loopback mode.

D) The BER test may now begin. Remember to disable the loopback and return the

terminal to its original configuration when finished.

EX7100 Technical Manual – Monitoring and Diagnostics

4.7 Networking EX7100 Terminals

4.7.1 General

It is possible to create a small network of EX7100 link s by connecting the management channel of multiple terminals toge ther at a local site. This enables a user to monitor and configure any other terminal in the network, from an ELMS conf igured PC, using the onboard remote diagnostic feature.

When combined with ELMS (Exicom Link Management System – refer to Appendix B) an extensive alarm logging system can be established.

o o

o

o o

o

o o

EX7100

o o

o

o o

o

o o

EX7100

EXICOM

EX7100

EXICOM

o o

o

o o

o

o o

EX7100

o o

o

o o

o

EXICOM

o o

o

o o

o

o o

EX7100

EXICOM

o o

o

o o

o

o o

EX7100

EXICOM

o o

o

o o

o

o o

EX7100

EXICOM

Repeater

EX7100

o o

o

o o

o

o o

EX7100

o o

o

o o

o

o o

EX7100

EXICOM

o o

o

o o

o

o o

EX7100

o o

o

o o

o

o o

EX7100

EXICOM

o o

o

o o

o

o o

EX7100

Figure 4.8: Networking EX7100 terminals

4.7.2 Interconnection of Local Terminals.

Interconnection of each EX7100 terminal’s management channel is achieved by simply daisy-chaining the RS-485 Bus which appears on the LMS port of each local terminal. Cabling should be screened and pin-out information is detailed in Appendix A.1.

Example: Three terminal bussed site.

o o

EXICOM

Terminal 1 LMS Port

o o o o

EX7100

EXICOM

o o

o

o o

o

o o

EX7100

EX7100 EX7100

Terminal 2 LMS Port

o o

EXICOM

RS-485

o o o o o o

EX7100

o o

o

o o

o

o o

EX7100

EXICOM

EX7100

Local Site

o o

o

o o

o

o o

Terminal 3 LMS Port

EX7100

ELMS PC

EXICOM

Figure 4.9: Three Terminal Bussed Site

EX7100 Technical Manual – Monitoring and Diagnostics

The following table shows the pin to pin connections required for the LMS port connector

Terminal 1 – Terminal 2 Terminal 2 – Terminal 3 Terminal 3 – ELMS PC

Pin 1 - Pin 1 Pin 1 - Pin 1 Pin 3 - RS232 Tx Pin 2 - Pin 2 Pin 2 - Pin 2 Pin 4 - RS232 Rx Pin 5 - Pin 5 Pin 5 - Pin 5 Pin 5 – RS232 ground

Note: The ELMS PC connects to terminal three using RS-232. The terminals

communicate with each other using RS-485

4.7.3 Accessing Bussed Terminals.

Using an ELMS configured PC, the user may access any local terminal, or the remote terminal of any link. An instruction on how to use ELMS is provided within the program.

EX7100 Technical Manual – Monitoring and Diagnostics

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EX7100 Technical Manual - Troubleshooting

Trouble Shooting the EX7100

5.1 General

This chapter describes some methods of identifying problems with the EX7100 and suggests possible solutions.

The EX7100 has powerful fault diagnosis tools built in. Internal alarm monitoring, metering and configuration information are available on the front panel and at remote terminals. Refer to Section 4 for more details on the use of t hese diagnostic tools.

5.2 Configuration Issues

Configuration problems ar e not normally an issue with links that are already in operation, but an initial mis-configuration can prevent an EX7100 link from oper ating.

5

When changing modules within the EX7100, configuration problems can arise. This is because the modules carry the configurat ion information relevant to them – e.g. the Line Module carries line level and the other configuration variables relevant to the Line Module. An exception is that all RF configuration parameters are carried on the Transmitter module.

EX7100 Technical Manual - Troubleshooting

This page left intent ionally blank.

EX7100 Technical Manual - Troubleshooting

Symptoms Possible Causes How To Fix Additional Comments

Low transmit power, low RSSI and

Antenna or feeder fault . Replace faulty antenna and/or

poor VSWR

Duplexer faulty or out of alignment.

Transmit and/or receive frequency incorrect.

Low transmit power, VSW R &

Transmit power set low. Set terminal to the correct transmit

RSSI OK Low transmit power, high bit error

rate, VSWR & RSSI OK. Higher than usual bit error rate or

poor sensitivity, transmit power,

Faulty Transmitter module or Power Amplifier module.

Transmitter or receiver may have drifted off frequency.

RSSI & VSWR OK. Low RSSI reading. Can be caused by low transmit

power, feeder and/or antenna problems, antenna alignment and receiver problems.

feeder. Check, align or replace Duplex

Filter. Set terminals to correct transmit

and receive frequencies.

power level. See Sections 7.3 to 7.6.

Return to Exicom for alignment.

Refer to the appropriate sect ions of this manual.

Low transmit power or poor receiver sensitivity usually cause problems in one direction only. Feeder and antenna problems effect both direct ions of the link.

EX7100 Technical Manual - Troubleshooting

Symptoms Possible Causes How To Fix Additional Comments

Rx Lock frequently lost. Interference, intermittent

connector/feeder/antenna fault. Marginal RF path.

A communications scanning receiver can be very useful to identify interference sources.

A high power attenuator can be used to confirm the available fade

margin. Measurements of transmit power at antenna, substitution of feeders and antennas.

Problems with repeater operation. G703 coaxes not crossed over. Crossover coaxes. No dial tone, Rx Lock present. Line connections to EX7100. Line

Interface module f ault .

Check line connections. Refer to Section 7.13 for details.

Is the fault common t o all six lines?

Loop back testing of t he line

interfaces can be a useful

diagnostic tool.

Link will not set-up, Tx LED not on System configured for On-demand

Refer to Section 3.4.1 for details

Mode

EX7100 Technical Manual - Cover Removal

6

EX7100 Top and Bottom Cover Removal

The Terminal contains semi-conductor components that are sensitive to electrostatic damage.

Electrostatic sensitive devices should only be stored and transported inside electrically conductive static shielding bags. Fault finding and module replacement must be performed at “electrostatically safe work stat ions” where the work bench surface; soldering iron and the operator are all earthed to prevent the build up of harmful electrostatic charges.

6.1 Procedure

To gain service access to any of the modules, the top or bottom covers must be removed as follows:

1. Isolate the EX 7100 Terminal fr om the incoming DC supply by removing the DC input wires from the rear panel terminal block. It may also be necessary to remove any signalling and antenna cabling.

2. Remove either cover as required by removing the screws. Keep all screws in a safe

place for later replacement.

Warning: The VHF Duplexer module is attached to the under side

care must be tak en when removing this cover so as not to damage the RF cabling connecting the duplexer to the modules within the ter m inal.

The UHF Duplexer and associated filters are attached to the outside

top cover. Before disconnecting the RF cables to the rear panel, care should be taken to note the correct cable connect ion.

of the top cover. Extra

of the

EX7100 Technical Manual - Cover Removal

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EX7100 Technical Manual - Module Descriptions

7.1 General

The EX7100 Terminal consists of the following Modules:

General (Non-RF) Modules

> Power Supply Module Type 2964, > Modem/Controller Module Type 2966, > Front Panel Type 2994,

RF Modules

7

Module Descriptions

> VHF Transmitter Module Type 8027 or UHF Transmitter Module Type 8053, UHF CPU Module Type 8044 (sub-module of UHF Tx Module Type 8053), > VHF RF Power Amplifier Module Type 8028 or UHF RF Power Amplifier Module Type 8048 (10 Watt), > VHF Receiver Module Type 8029 or UHF Receiver Module Type 8054, > VHF Front-End Module Type 8018 (sub-module of VHF Rx Module Type 8029) or UHF Front-End Module Type 8055 (sub-module of UHF Rx Module Type 8054), > VHF Duplexer Module Type 8013 or UHF Duplexer (& Filters) Module Type 8045,

Line Interface Modules: (pr esent in t he six channel variant only)

> Two wire 6-Channel Exchange Line Interface Module Type 2967, Four wire Module Type 2967 (optional sub-module of Interface Type 2967), > Two wire 6-Channel Subscriber Line Interface Module Type 2971, > Isolated Power Supply Type 2990 (sub-module of each Line Interface module)

Refer to Figures 7.1 to 7.3 for module locations (Front Panel Type 2994 and Duplexer modules are not shown).

EX7100 Technical Manual - Module Descriptions

Line Interface Type

2967 or 2971

Isolated Power

Supply Type 2990

Modem/Controller

Type 2966

Figure 7.1: EX7100 Terminal with Top Cover Removed

Note: VHF and UHF Terminals are identical with the Top Cover removed.

PA Type 8028

Transmitter Type

8027

Receiver Type

8029

Power Supply Type

2964

PSU Measurement

Board Type 2998

Receiver Front-End

Type 8018

Figure 7.2: VHF EX7100 Terminal with Bottom Cover Removed

EX7100 Technical Manual - Module Descriptions

Transmitter Type

8053

PA Type 8048

Transmitter CPU

Type 8044

Receiver Type

8054

Figure 7.3: UHF EX7100 Terminal with Bottom Cover Removed

7.2 Power Supply Module Type 2964

7.2.1 General

The Power Supply module (PSU) converts the incoming DC input from the rear panel to the voltages needed to operate the circuitry within the EX7100 terminal.

Power Supply Type

2964

PSU Measurement

Board Type 2998

Receiver FrontEnd Type 8055

There are two variants of the Power Supply

1

: > 10.8 VDC - 30 VDC Input > 30 VDC - 60 VDC Input

The incoming supply may be positive earth, negative earth or floating (with no earth connection).

Refer to Figure 7.4. The f irst stag e of t he power supply is an isolated “forward” converter. This converts the incoming DC voltage to +24 volts, negative earth. The +24 volt supply is used as required within t he EX7100 terminal and is used to supply a second stage “f lyback” converter that provides ±5 and ±15 volt output s.

1

Refer to Section 2, page 2-6 for IMPORTANT WARNINGS re the power supply

EX7100 Technical Manual - Module Descriptions

+24V

+15V

DC Input

From Rear

Panel

Forward

Converter

Figure 7.4: Power Supply Block Diagram

The PSU Measurement Board connected to t he Power Supply provides various metering functions via the terminal’s f ront panel display (Refer to Sect ion 7.2.2 for details). This is calibrated to the Power Supply and is considered an integral part of the Power Supply.

7.2.2 Testing and Fault Diagnosis

Note: Refer to Section 5 “Troubleshooting the EX7100” before reading this Section.

The module contains semi-conductor components that are sensitive to electrostatic damage.

Electrostatic sensitive devices should only be stored and transported inside electrically conductive static shielding bags. Fault finding and module replacement must be performed at “electrostatically safe work stat ions” where the work bench surface; soldering iron and the operator are all earthed to prevent the build up of harmful electrostatic charges.

-15V +5V

-5V

Isolation

Barrier

Flyback

Converter

General

Front panel diagnostics are available to measure the power supply’s input and output voltages, and the input current.

To access the PSU Monitoring from idle:

1) From idle, press ‘Enter’ Use t he ar r ow keys to enter the First

Password ∗ ∗ 1 ∗ ↑

Level password ‘1111’ and then press ‘Enter’.

2) Use the up and down arrows until the →→→→ is next to PSU Monitoring and then press

framer →psu monitoring

‘Enter’

3) Use the up and down arrows to position the →→→→ next to the required parameter and

+5 VDC rail →-5 VDC Rail

then press ‘Enter’ to view

EX7100 Technical Manual - Module Descriptions

4) Press t he ‘Escape’ key to back out of the menu system.

The power supply can be considered to be operating satisfactor ily if the supply rails are within the ranges specified within Table 7.1 below.

Front Panel Measurement Typical Reading Range

Input DC Voltage 10.8 to 30V (LV variant), 30 to 60V (HV variant) +24 Volt Rail 22.8 to 25.2V +15 Volt Rail 14 to 16V

-15 Volt Rail -14 to -16V +5 Volt Rail 4.8 to 5.2V

-5 Volt Rail -4.7 to -5.3V Input Current Up to: 9A (LV variant), 3A (HV variant)

Table 7.1: Typical Power Supply Measurement Ranges

If the display is not operating or the power supply rails are not within the expected voltage, follow the steps outlined in Figur e 7. 5 overleaf.

Accessing the Power Supply

To gain service access to the power supply module, remove the bottom cover of the terminal as described in Section 6.1.

Before commencing cover removal, switch the r ear panel power switch off electrolytic capacitors are discharged bef or e pr oceeding.

AND isolate the fused supply to the unit. Check that

Diagnosis

With the unit de-powered, check the power supply visually for signs of damage such as burnt tracks, or components. If no damage is apparent, apply power to the t erminal and check the voltages in Table 7.2.

Note: Measurements should be made with an isolated dig ital multi-meter to prevent the

possibility of injury to servicing personnel or damage to the terminal.

EX7100 Technical Manual - Module Descriptions

Begin

DC i/p present

on Terminal

Rear Panel?

Yes

Switch on EX7100 Terminal

PSU Met er

Readings ok as

per Table 7.1?

No

Remove EX7100 Bottom Cover

Does internal Relay

operate with Rea r

Panel Switch?

Yes

No

Yes

Check DC i /p

supply, ext ernal

Fus e, Wiring &

Connections

PSU Module

appears to be

fault-free

Refer t o

Caution

notes

Replace PSU module

No

Voltages on all

internal Fuses

ok?

Yes

PSU appea r s

fault-free,

Suspect that

another Module

is faulty

Finish

No

Replac e an y blown F u ses

Any/all i nternal

Fuses blown?

Yes

Figure 7.5: Power Supply Fault Diagnostic Tree

EX7100 Technical Manual - Module Descriptions

Test Number

1 TB1 +ve terminal. T B1 - ve terminal. Input voltage ± 0. 5V. 2 10 A Fuse F1, bot h ends. Chassis Ground 22.8 to 25.2V. 3 2 A Fuse F2, both ends. Chassis Ground 14 to 16V. 4 1 A Fuse F3, both ends. Chassis Ground -14 to -16V. 5 5 A Fuse F4, both ends. Chassis Ground 4.8 to 5.2V. 6 250 mA Fuse F5, both ends. Chassis Gr ound -4.7 to -5.3V.

Fuse Rating

Positive Probe Negative Probe Expected Voltage

Table 7.2: Typical Power Supply Test Point Voltages

7.2.3 Alignment

The Power Supply requires no alignment and has no user adjust m ents. Two potentiometers ar e provided: RV301 & RV302. They are factory set to t he required

under-voltage and over-voltage shut down thresholds and should not be adjusted The PSU Measurement board has factory set metering coefficients. These cannot be

adjusted in the field.

7.2.4 Module Replacement Procedure

.

1. Isolate the EX 7100 Terminal fr om the incoming DC supply by removing the DC input wires from the rear panel terminal block.

2. Remove the bottom cover as described in Section 6.1.

3. Note the connector positions and the way that the cables ar e run (it is important that all cables are replaced as they were initially run before the module replacement procedure).

4. Disconnect t he remote on/off switch loom by unplugging SK301. Remove the wiring loom plug from PL1 and remo ve the cable from SK6.

5. Loosen the screws of the terminal block TB1 and remove the DC input wires. Caution: Remove the six f errite beads (two per wire) and keep in a safe place for future replacement.

6. Check, using a multimeter, placed between the eart h (on TB1) and the fuse carriers on the PCB, that the filter capacitors have safely discharged.

7. Remove the nine M3 screws and bushes from the heat-sink mounted semiconductors. Keep them in a safe place.

8. Remove the six M4 screws and washers holding the PCB and keep them in a safe place. Carefully lift the PCB out of its housing. Do not carry the PCB by the pr oject ing semiconductors. The PCB can be safely carried by grasping T1 (the largest transformer) or by holding it by the edges of the board.

EX7100 Technical Manual - Module Descriptions

9. Remove the thermal pads and the insulating bushes and discard them. Inspect the new pads and bushes carefully for any foreign m atter. Small specks of dirt or metal filings can cause the pad to be punctured when the semiconductors are clamped down.

10. Carefully remove all foreign matter from the mating surfaces of the new Power Supply’s semiconductors and the heat-sink contact area.

11. Align new pads with the holes in the heat-sink contact area. Place the new power supply PCB in its cavity and alig n the boar d with its mounting holes. Replace the nine semiconductor mounting screws and bushes. Do not fully tig ht en the screws.

12. Replace t he six M4 PCB mounting screws and washers. Tighten the screws caref ully (do not over tighten as this can strip the internal screw threads). Tighten the semiconductor mounting screws.

13. Using a multimeter, measure the resistance from the tab of each semiconductor to the aluminium casting. All readings should be more than 400Ω (ensure that PL1 is not plugged in when measuring). If any reading is lower, remove the heat-sink components and check them all caref ully for the cause of the short circuit. Caution: do not proceed with the installation until this insulation test has been passed successfully or the power supply will be damaged.

14. Replace the six ferr ite beads (two per wire) on the main power cables and insert into terminal block TB1. Ensure that the polarity is correct. Carefully tight en the screws of the terminal block.

15. Re-connect the cable loom plug into PL1 and the cable into connect or SK6.

16. Re-connect the r emote on/ of f switch loom t o SK301. Ensure that all

cables are run as

they were prior to removal.

17. Inspect the EX 7100 terminal to ensure that it is free of foreign mater ial. Remove and clean as required.

18. Connect the ant enna to the terminal. Check the external

DC supply fuse, to ensure it

is not blown and replace if required (refer to Section 2.6.1 for fuse types and ratings)

19. Apply power to the EX7100 rear panel and switch the terminal on. Measure the output rails with a multimeter and verify that they are all within the specifications as detailed in Table 7.1.

20. Replace the bottom cover, taking care to t ighten every screw. No screws should be left over at the end of the job.

21. Re-install t he EX 7100 into its r ack and re- connect all necessary power, sig nalling and antenna cabling.

EX7100 Technical Manual - Module Descriptions

7.3 VHF Transmitter Module Type 8027

7.3.1 General

The VHF Transmitter module accept s data f r om the Modem Controller module Type 2966 (via the VHF Receiver module Type 8029). This data is f iltered, modulated with a locally generated carrier, amplif ied and then f iltered ag ain ready for am plificat ion by the VHF RF Power Amplifier Module (PA) Type 8028.

A microcontroller on the Transmitter Module provides control and metering for the Transmitter, PA, Receiver and Receiver Front-End (FE). The microcontroller on the Transmitter module also stores configuration information for the Transmitter, Receiver and RF PA modules.

Figure 7.6 below shows the connections between the RF modules and the Modem/Controller module. This diagram should be referred t o when reading the VHF RF module sections following.

W102

Data & Comms

PL101

PL103

Data & Comms

Modem/Controller

Transmitter

Module

Metering

Receiver

Module

AGC

PL108

Tx Drive

RF

Metering

PL100

RF PA

Module

PL102

Tx RF

Duplex Filt er

(Duplexer)

Receiver

Front End (FE)

W101

Rx RF

AGC, Control & Metering

SK102

Module

SK101

Rx RF

Figure 7.6: VHF RF Module Connection Block Diagram

Antenna

EX7100 Technical Manual - Module Descriptions

Figure 7.7: VHF Transmitter Module in Place within an EX7100 Terminal

7.3.2 Testing and Fault Diagnosis

General

Note: Refer to Section 5 “Troubleshooting the EX7100” before reading this Section.

The Transmitter module provides control t o the Receiver module, t he Receiver Front-End module and the Transmitter RF Power Amplifier. It collects measurements from all of these modules and interacts with the Modem/Controller module.

For this reason, a faulty Transm itter module m ay cause symptoms that appear elsewhere while faults elsewhere may cause symptoms to appear at the Transm it t er m odule.

The module contains semi-conductor components that are sensitive to electrostatic damage.

Electrostatic sensitive devices should only be stored and transported inside electrically conductive static shielding bags. Fault finding and module replacement must be performed at “electrostatically safe work stat ions” where the work bench surface; soldering iron and the operator are all earthed to prevent the build up of harmful electrostatic charges.

The RF Power Amplifier module must not be run without a 50Ω load on its output. Failure to meet this condition may damage the amplifier.

EX7100 Technical Manual - Module Descriptions

The RF devices used in the Power Amplifier module may contain beryllium dioxide. These devices must not be broken, ground, hammered or t ampered with in any way, and should be disposed of in a safe manner as specified in local environmental and safety legislation. If safe disposal is a problem, they should be sealed in an appropriate container and returned to Exicom for disposal. In this case, it is the senders’ responsibility to ensure that all precautions are taken to ensure safe delivery to Exicom.

Accessing the Transmitter Module

To gain service access to the Transmitter module, remove the bottom cover as per Section 6.1.

Diagnosis

With the unit de-powered, check the Transmitter module visually for signs of damage such as burnt tracks or components. Check that all connectors are fully mat ed and that all socketed ICs are fully home. If no damage is apparent, apply power and follow the steps outlined in Figure 7.8.

EX7100 Technical Manual - Module Descriptions

Antenna

Begin

Caution:

output

terminated i n 50 Ohms

mus t be

Module RF output on correct frequency &

at correct level ?

Yes

Pow er, Tx

Temperature &

VSWR

measurements ok?

Yes

Transmitter module

appears to be fault-free,

suspect that another

Module is faulty

Output Fi lter

correctly

No

tuned?

Yes

Suspect that

Transmitter module is

faulty

Suspect that

Transmitter module is

faulty

No

Tune Transmitter

output

Replace Transmitter

m odule

Replace Transmitter

m odule

Finish

Figure 7.8: VHF Transmitter Module Fault Diagnostic Tree

Exicom EX7100 1 Users manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Mandatory Regulations

Contents

Introduction

Installation of Antenna and Equipment

Configuring the Terminal

Monitoring and diagnostics

Trouble Shooting the EX7100

EX7100 Top and Bottom Cover Removal

Module Descriptions