Tait TBAL0 Users Manual
TB8100 base station
Calibration Kit
User’s Manual
MBA-00011-05
March 2005
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
Basic Tasks .........................................................................................................1
Using the TB8100 Calibration Kit ..........................................................1
About the Toolbar ............................................................................2
About the Status Bar ..........................................................................2
Equipment Required ..............................................................................3
Calibration Overview .............................................................................3
Field Calibration ................................................................................4
Service Center Calibration .................................................................4
Selecting the Communications Port ........................................................5
Connecting to a Reciter Outside the Subrack .........................................5
Connecting to a Reciter via the Control Panel .......................................7
Disconnecting from the Base Station/Reciter .........................................7
Troubleshooting .....................................................................................8
Adjusting the Frequency Setup ........................................................................9
Adjusting the Receiver Lock Band .........................................................9
Tuning the Receiver Front End ...........................................................10
Tuning a K-Band, H-Band, or L-Band Receiver Front End ............11
Tuning a VHF Receiver Front End .................................................12
Adjusting the Exciter Lock Band ..........................................................13
Calibrating the Reciter ....................................................................................14
Calibrating the Exciter ..........................................................................14
Automatically Tune the Frequency Control Loop (FCL) .................14
Calibrating the FCL .........................................................................14
Calibrating the VCO .......................................................................16
Calibrating the RSSI .............................................................................17
Audio Calibration ................................................................................. 18
Calibrating the Balanced Lines .........................................................18
Calibrating the Unbalanced Lines ....................................................19
Carrier Frequency Offset Adjustment
(Older Reciters) ....................................................................................21
Carrier Frequency Offset Adjustment
(Newer Reciters) ..................................................................................22
Calibrating the Power Amplifier ....................................................................24
TB8100 Calibration Kit User’s Manual Contents i
Calibrating the PA Bias ........................................................................ 24
Calibrating the Forward and Reverse Detector Bias Voltages ............... 25
Calibrating the PA Power .................................................................... 25
Troubleshooting Tips ..................................................................... 26
Calibrating the Supply Voltage ............................................................. 27
Calibrating the Power Management Unit .................................................... 28
Calibrating the PMU Output Voltage .................................................. 28
Index .................................................................................. 29
ii Contents © Tait Electronics Limited 2005
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 02.05 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 support@taitworld.com, 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 F 1 or click the Help icon on the toolbar. If you are in a dialog
box, click the Help button.
■ TB8100 Installation and Operation Manual.
■ TB8100 Service Manual (service centers only). A glossary of terms is available
in this manual.
■ TN-778 The TB8100 Calibration and Test Unit.
For additional items, see the TB8100 Installation and Operation Manual and
the TB8100 Service Kit User’s Manual or online Help.
TB8100 Calibration Kit User’s Manual Preface iii
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.
02.00 March 2004 Minor quality issues resolved and software
changes documented for Version 02.00.
02.01
(MBA-00011-03)
02.02
(MBA-00011-04)
02.05
(MBA-00011-05)
September
2004
December
2004
March
2005
Carrier Frequency Offset Adjustment
procedure for reciter version 00.03+ added.
PA store supply voltage and PMU output
voltage calibration added.
Changes for K-band reciters.
Minor changes for Calibration Kit software
version 02.05. L-band reciters.
iv Preface © Tait Electronics Limited 2005
Basic Tasks
The TB8100 Calibration Kit is a Windows-based software program that allows
you to adjust the switching ranges of Tait TB8100 base stations (both receiver
and transmitter), and to flatten the receiver response across that switching range.
The TB8100 Calibration Kit is also used to calibrate the reciter, the PA, and
the PMU after servicing.
Using the TB8100 Calibration Kit
When you start the TB8100 Calibration Kit, the main program window
appears.
Menu bar
Toolbar
Calibration
Wizards
Status bar
The main program window has four tabs. The Calibration Wizards displayed
on each tab are only visible once you are connected to the reciter or the base
station.
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, band,
and hardware version) about the currently selected module by clicking Show
Details.
Frequency Setup
tab
Reciter Calibrat ion
tab
Shows the three Calibration Wizards that take you step-by-step through the
frequency setup.
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 four calibration procedures that you can perform on the power
amplifier. The Calibration Wizard takes you step-by-step through the
procedure you have selected.
PMU Calibration
tab
Shows the procedure that you can perform on the PMU.
TB8100 Calibration Kit User’s Manual Using the TB8100 Calibration Kit 1
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
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.
Lets you select another base station to calibrate if there are multiple base stations
in the rack (not currently supported).
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
2 Using the TB8100 Calibration Kit © Tait Electronics Limited 2005
Equipment Required
You need the following equipment for field calibration:
■ Calibration and test unit (CTU) (order code TBA0ST1) which comes with
the cables you will need for connection to the reciter/PA and the PC. For
more information about the CTU, please refer to TN-778 The TB8100
Calibration and Test Unit.
Power cable
RF cable
25-way cable
15-way TaitNet
cable
BNC to BNC
cable
■ Calibration test kit (order code TBA0ST2) which comprises tuning tools
and the required screwdrivers in a tool pouch
■ 10-30 V DC power supply
■ RS-232 cable
■ RF attenuator (optional – depends on the setup)
You may need the following additional equipment for a service center
calibration:
■ Frequency counter
■ Modulation meter
■ RF signal source
■ AC millivoltmeter (one with a differential input may be required for
“Calibrating the Balanced Lines” on page 18)
Refer to the individual procedures for equipment setup diagrams.
Calibration Overview
Any calibration process creates digital values and a calibration date, which are
stored in the base station. The Service Kit can display the date of the last
calibration. Many calibration procedures initially clear the stored digital values.
If you do not complete the procedure or the stored digital values are outside
acceptable limits, the module is left uncalibrated. An uncalibrated reciter will go
into Download mode on startup and cannot be put into Run mode. An
uncalibrated PA generates a calibration invalid alarm.
If the procedure you are performing requires access to tuning holes, you need
to remove the reciter from the subrack and connect to it via the CTU.
The following tables summarise, for each procedure, whether or not you need
to remove the reciter from the subrack, and what equipment (in addition to a
PC with the TB8100 Calibration Kit software) you will need.
16-way cable
TB8100 Calibration Kit User’s Manual Equipment Required 3
Field Calibration
The following procedures can be carried out in the field.
Procedure Connection Equipment Required
Adjusting receiver lock band Outside subrack Tuning tool, CTU
Tuning the receiver Outside subrack Tuning tool (with fine metal
tip for UHF reciter), CTU
Adjusting exciter lock band Outside subrack Tuning tool, CTU
Reciter
Adjusting the carrier frequency
offset
Depends on
reciter
Tuning tool, Frequency
counter, RF attenuator (only
if using PA)
Service Center Calibration
The following additional procedures may need to be carried out after a module
has been serviced.
Note: Replacing or repairing a board module may mean that the
module’s product code, product type (frequency band), serial
number, and/or hardware version need to be re-entered or altered.
To do this, your Calibration Kit needs a dongle. The Service Manual indicates
when a module detail needs re-entering or altering.
Procedure Connection Equipment Required
Automatically tuning FCL Inside subrack None
Calibrating the FCL modulation Outside subrack Tuning tool, CTU,
modulation meter, RF
attenuator (only if using PA)
Calibrating the VCO modulation Outside subrack Tuning tool, CTU,
modulation meter, RF
attenuator (only if using PA)
Calibrating the RSSI Inside subrack RF signal source
Calibrating the balanced lines Inside subrack CTU, AC millivoltmeter
(perhaps with differential
input)
Calibrating the unbalanced lines Inside subrack CTU, AC millivoltmeter
4 Calibration Overview © Tait Electronics Limited 2005
Power Amplifier
Procedure Connection Equipment Required
Calibrating the PA bias Inside subrack None required
Calibrating the forward &
reverse detector bias voltages
Calibrating the PA power Inside subrack None required
Storing supply voltages Inside subrack Variable voltage external
Power
Management Unit
Procedure Connection Equipment Required
Output voltage calibration Inside subrack Digital multimeter
Selecting the Communications Port
Before you connect to a base station, you should first define the
communications (COM) port that you want to use.
To select the COM port
1. Select Tools > Options.
Inside subrack None required
power supply
2. Select the port that you want to use from the COM Port list.
Note: The available COM ports are detected by the program and
appear in the list.
3. Click OK.
The COM port you selected is now shown on the status bar.
Connecting to a Reciter Outside the Subrack
Field calibration procedures require access to the tuning holes, so you need to
remove the reciter from the subrack and connect to it using a CTU.
Equipment ■ Calibration and test unit (CTU)
■ An IBM compatible PC
■ 10-30 V DC power supply
■ 16-way cable
■ RS-232 cable
TB8100 Calibration Kit User’s Manual Selecting the Communications Port 5
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