Tait TB8100 User manual

Calibration Kit
User’s Manual
MB8100-90-00-806
June 2003
TB8100 base station

TB8100 Calibration Kit User’s Manual Contents i
Contents
Preface ..............................................................................................................iii
Enquiries and Comments ..................................................................iii
Updates of Manual and Equipment ...................................................iii
Copyright .........................................................................................iii
Disclaimer ........................................................................................iii
Typographical Conventions ..............................................................iii
Associated Documentation ...............................................................iii
Publication Record ..........................................................................iv
About TB8100 Calibration Kit ...........................................................................5
Tour of TB8100 Calibration Kit .............................................................5
About the Toolbar ............................................................................6
About the Status Bar ..........................................................................6
Basic Tasks .........................................................................................................7
Equipment Required ..............................................................................7
Tuning Tool .....................................................................................7
Reciter Tuning Holes .............................................................................8
Holes for Tuning the Receiver VCO and Exciter VCO ....................8
Holes for Tuning the Receiver Front-End .........................................8
Configuring TB8100 Calibration Kit ......................................................9
Selecting the Communications Port ...................................................9
Connecting to the Base Station ...............................................................9
Connecting to the Reciter Outside the Subrack ..............................10
Connecting to the Reciter/PA in the Subrack .................................11
Disconnecting from the Base Station/Reciter .......................................12
Basic Troubleshooting ..........................................................................12
Adjusting the Frequency Setup ......................................................................13
Adjusting the Receiver Lock Band .......................................................13
Tuning the Receiver ............................................................................14
Adjusting the Exciter Lock Band ..........................................................15
Calibrating the Reciter ....................................................................................17
Calibrating the Exciter ..........................................................................17
Automatically Tune the Frequency Control Loop (FCL) .................17
Calibrating the FCL Modulation .....................................................17
Calibrating the VCO Modulation ....................................................18
Calibrating the RSSI .............................................................................19
Audio Calibration .................................................................................21
Calibrating the Balanced Lines .........................................................21
Calibrating the Unbalanced Lines ....................................................22
Calibrating the TCXO .........................................................................23

ii Contents MB8100-90-00-806 © TEL 2003
Calibrating the Power Amplifier ................................................................... 25
Calibrating the PA Bias ........................................................................ 25
Calibrating the PA Power .................................................................... 26
Troubleshooting Tips ..................................................................... 27
Calibrating the Forward and Reverse Detector Bias Voltages ............... 27
Index .................................................................................. 29

TB8100 Calibration Kit User’s Manual Preface iii
Preface
Welcome to the TB8100 Calibration Kit User’s Manual. This manual provides
you with information about the Tait TB8100 Calibration Kit in PDF format.
You can view it online or print it if you want a paper copy. It describes how to
use Version 1.0 of the Calibration Kit.
Enquiries and Comments
Any enquiries regarding this manual as well as any comments, suggestions and
notifications of errors should be sent to [e-mail], or addressed
to the Support Group Manager, Tait Electronics Limited, PO Box 1645
Christchurch, New Zealand.
Updates of Manual and Equipment
In the interests of improving the performance, reliability or servicing of the
equipment, Tait Electronics Limited reserves the right to update the equipment
or this manual or both without prior notice.
Copyright
All information contained in this manual is the property of Tait Electronics
Limited. All rights are reserved. This manual may not, in whole or in part, be
copied, photocopied, reproduced, translated, stored, or reduced to any
electronic medium or machine-readable form, without prior written
permission from Tait Electronics Limited. All trade names referenced are the
service mark, trademark or registered trademark of the respective
manufacturers.
Disclaimer
There are no warranties extended or granted by this manual. Tait Electronics
Limited accepts no responsibility for damage arising from use of the information
contained in the manual or of the equipment and software it describes. It is the
responsibility of the user to ensure that use of such information, equipment and
software complies with the laws, rules and regulations of the applicable
jurisdictions.
Typographical Conventions
‘File > Exit’ means ‘click File on the menu bar, then select Exit’.
Associated Documentation
■Online Help. The Calibration Kit also has online Help. It contains more or
less the same information as this manual. To view it, start the Calibration
Kit, then press F1 or click the Help icon on the toolbar. If you are in a dialog
box, click the Help button.
■TB8100 Installation Guide.
■TB8100 Installation and Operation Manual.
■TB8100 Service Manual (service centers only). A glossary of terms is available
in this manual.

iv Preface MB8100-90-00-806 © TEL 2003
■TB8100 Service Kit User’s Manual. The Service Kit is a Windows-based
software program that makes it easy to monitor and configure a Tait
TB8100 base station. You can also use it to carry out diagnostic tests on the
base station and to update its firmware. The Service Kit also has online Help.
Technical notes are published from time to time to describe applications for
Tait products, to provide technical details not included in manuals, and to offer
solutions for any problems that arise. Look for them on Tait's technical support
website. The following have been published or are in development:
■TN-742 Remotely Monitoring and Configuring the Tait TB8100.
■TN-743 Using the Tait TB8100 as a Talk-Through Repeater.
■TN-745 Using the Tait TB8100 in TaitNet Trunked Networks.
■TN-744 Using the Tait TB8100 as a Line-Connected Base Station.
Publication Record
Version Date Description
1.0 June
2003
First release of the manual for Version 1.0.0
of the Tait TB8100 Calibration Kit software.

TB8100 Calibration Kit User’s Manual Tour of TB8100 Calibration Kit 5
About TB8100 Calibration Kit
The TB8100 Calibration Kit is a Windows-based software program that allows
you to adjust the switching ranges of the receiver and transmitter, and flatten
the receiver response across the switching range.
Accredited Tait service centers can use the TB8100 Calibration Kit to calibrate
the reciter and the PA after servicing.
Tour of TB8100 Calibration Kit
When you start the TB8100 Calibration Kit, the main program window
appears.
The main program window has three tabs. The Calibration Wizards displayed
on each tab are only visible once you are connected to the reciter and/or base
station.
Frequency Setup
tab Shows the three Calibration Wizards that take you step-by-step through the
frequency setup.
ReciterCalibration
tab
Shows the seven calibration procedures that you can perform on the reciter.
The Calibration Wizard takes you step-by-step through the procedure you
have selected.
PA Calibration tab Shows the three calibration procedures that you can perform on the power
amplifier. The Calibration Wizard takes you step-by-step through the
procedure you have selected.
When the TB8100 Calibration Kit is connected to the reciter or base station,
you can view further details (such as module number, type, serial number, and
band) about the currently selected reciter and/or PA by clicking Show Details.
Menu bar
Toolbar
Calibration
Wizards
Status bar

6 Tour of TB8100 Calibration Kit MB8100-90-00-806 © TEL 2003
About the Toolbar
The toolbar gives you quick access to commonly used menu commands. For
example, instead of selecting Base Station > Calibrate, you can click the
Calibrate icon on the toolbar.
Connect Connects the TB8100 Calibration Kit to the base station and opens the
communication channels.
Switch Base
Station Lets you select another base station to calibrate if there are multiple base stations
in the rack.
Calibrate Runs the Calibration Wizard for the currently selected task.
Options Allows you to set the COM port and default calibration mode.
Help Opens the online help for the window you are currently in.
About the Status Bar
The status bar provides you with useful information that supplements the
display in the main window.
Miscellaneous messages COM port in use

TB8100 Calibration Kit User’s Manual Equipment Required 7
Basic Tasks
Before you start tuning and calibrating the base station, make sure that:
1. You have all the necessary equipment for the particular procedure(s) that
you want to perform, and
2. Your PC is connected to the base station or reciter.
If you want to define the switching range for a base station (if this has not
already been done), start here: “Adjusting the Frequency Setup” on page 13.
Equipment Required
You need the following equipment to tune and calibrate the base station:
■AC millivoltmeter (one with a differential input may be required for
“Calibrating the Balanced Lines” on page 21)
■Calibration test unit (CTU) (order code XBA0ST1)
■Calibration test kit (order code XBA0ST1-CBL) which comprises the
cables you will need to connect the CTU to the reciter/PA and the PC, and
a tuning tool
■Frequency counter
■Modulation meter
■RF attenuator (optional—depends on the setup)
■RF signal source
Refer to the individual procedures for equipment setup diagrams.
For more information about the calibration test unit, please refer to the TB8100
Service Manual.
Tuning Tool
The recommended tuning tool (for adjusting the front-end helical filters and
the VCOs in the reciter) is included in the calibration test kit (see Equipment
Required). It can also be ordered separately (order code 937-00012-00)
25-way cable
15-way TaitNet
cable
16-way cable
Power cable
RF cable
BNC to BNC
cable
20 mm
Bit shape:
Blade diameter: 2.2 mm Blade thickness: 0.4 mm

8 Reciter Tuning Holes MB8100-90-00-806 © TEL 2003
Reciter Tuning Holes
The following topics show the location of the holes for tuning the front-end
helical filters, and the VCO (Voltage Controlled Oscillator) in the reciter.
Adjusting the
frequency
When you tune the VCOs and the front-end helical filters, turn the tuning tool:
■Clockwise to reduce the frequency
■Anti-clockwise to increase the frequency
Holes for Tuning the Receiver VCO and Exciter VCO
The holes for tuning the receiver VCO and exciter VCO are shown below.
Holes for Tuning the Receiver Front-End
When running the Tune Receiver Wizard, you will need to tune the front-end
helical filters using the tuning tool as follows:
1. Insert the tuning tool into the first hole of the first triplet (see photograph).
2. Tune each of the resonators once to give the best response.
3. Do the same for the second triplet.
Exciter VCO
tuning hole
Receiver VCO
tuning hole