Tait TEL0009 User Manual 8

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Document Description	8
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Document Title	8

TAIT ELECTRONIC“; LIMITED
ID: CASTEIL0009. SERVICE MANUAL
T850 Series II
Base Station Equipment
Service Manual
Preliminary Issue
November 1997
(Not For Resale)
Copyright TEL
November 1997
Head Office
New Zealand
Tait Electronics le
558 Wairakei Road
R0. Box 1645
Christchurch
New Zealand
Phone 64 3 358-3399
Fax: 64 3 35873636
Radio lnfrnslruclure Division
535 Walrakel Road
PO. Box 1645
Christchurch
New Zgaland
Phone: 64 3 358-3399
Fax 64 3 358-2825
Australia
Tait Electmnics (Aust) Pty Ltd
186 Granite Street
Geebung Qld 4034
PO Box 679
Virginia
Queensland 4014
Australia
Phone: 61 7 35657799
Toll Free: 1800 0777112
Fax: 61 7 38654990
Canada
Tait Mobile Radio Inc
Unit 5, 158 Andersun Avenue
Markham
Ontarlo L6E1A9
Canada
Phone 1 905 472-1100
Toll Free 1 800 890-5245
Fax 1 905 47275300
Funce
Tait France Sail
2 Avenue dc Ia Cristallerle
92 316 Sevres, Cedex
France
Phone: 331 41 14—05-50
Fax 33 141 14—05-55
Germany
Tait Mobilfunk GmbH
Willst’atlerstmfie 50
D-90449 Numberg 60
Germany
Phone. 49 911 96 7460
Fax 49 911 96 746-79
Hong Kong
Tait Mnbile Radio (HK) Ltd
Room 703A
New East Ocean Centre
9, Science Museum Road
Tsim Sha Tsui East
Hong Kong
Phone: 852 2369—3040
Fax 852 2369-3009
N ew Zeahnd
Tait Communications Ltd
Umt 4, 75 Blenheim Road
P 0, Box 1185
Christchurch
Phone: 64 3 34873301
Fax: 64 3 3430558
Singapore
Tait Elenroniis (Far East) Pie Ltd
4 bang Kee Road
SIS Building MOSrllA
Singapore 159088
Phone: 55 4714555
Fax: es 4797773
Taiwan
Tait Elenmmcs (Taiwan) Ltd
11041 ND. 142 Chung Hslao E4 Rd
Sec. 4
Taipei
Taiwan
Phone: 886 2 731-1290
Fax 8362 711£351
Thailand
Tait Mobile Radm Ltd
14/1 Suwan Tower
Ground Floor
Soi Saladaengl
North Szihnm Road
Bangrak
Bangkok 10500
Thailand
Phone. 662 267-6290-2
Fax: 662 267—6293
United Kingdom
Tait Mobile Radio Ltd
Ermine Business Park
Ermine Road
lluntlngdon
Cambridgahire PEIB 6YA
Uniled Kingdom
Phone 44 143052255
Fax 44 14804111996
USA
Tail Electronics (USA) inc
9434 Old Katy Rnad
Suite 110
Hnusmn
Texas 77055
USA
Phone 1713 984-8684
Toll Free 1 500 2224255
Fax: 1 713 4656944
November 1997
Copyright TEL
About This Manual
Scope This manual contains preliminary servicing information on TBSO
Series ll 25W, 50W and 100W base stations which comprise the
followmg equipment:
25W base station \/ TESS receiver
T856 25W transmitter
50W base station ‘ T855 receiver
T8537 exciter
TESS 50W power amplifier
100W base station T855 receiver
T8557 exciter
T859 100W power amplifier
Contents Part A contains information on the followmg procedures:
- changing the operating frequency
- re-tuning the module after changing frequency
. configuring the audio processor
Parts B to G contain the following PCB information:
' parts lists
grid reference indexes
PCB layout diagrams
test points & options diagrams (T857 only)
circuit diagrams
Part H contains the following information on the TBOD-ZZ-OOOO
rack frame:
0 general information
' circuit operation
- parts lists
- PCB layout diagrams
Part I contains the following information:
- TBSO Series 1 /H compatibility
Copyright TEL November 1997
Technical Information
Any enquiries regarding this manual or the equipment it describes should be addressed
in the first instance to your nearest approved Tait Dealer or Service Centre. Further
technical assrstance and copies of this manual may be obtained from the Customer Sup-
port Group, Radio Infrastructure Division, Tait Electronics Ltd, Christchurch, New Zea?
land.
Date Of Issue
TBSO Series II Preliminary Servrce Manual published November 1997
November 1997 Copyright TEL
Table Of Contents
Part Title
Changing The Operating Frequency Of The TBDO Series II
TESS Receiver Preliminary PCB information
T856 Transmitter Preliminary PCB Information
T557 Exciter Preliminary PCB Information
TSSB Power Amplifier Preliminary PCB Information
T559 Power Amplifier Preliminary PCB Infomation
T850 VCO Preliminary PCB Information
T800-22-000ll Rack Frame
T8543 Series IIII Compatibility
Copyright TEL November 1997
Using The Parts Lists
In this manual there are separate parts lists for each product type. The table below
shows which lists to use for each product type.
To refer to the parts list for a 4 , ‘ use the following
sections . . .
Dssx-moooo
TSSX-lO xssxm-oooo
D85X-13-0000
XSSX-l 3-0000
DSSX—lS—OOOO
TBSX'IS xasx-ls-oooo
T85X-13
DBSX-ZO-OOOO
TSSX'ZO xssx-zomoo
DESX-ZS—OOOU
T85X'23 xssx-zsmoo
_J
Dasx-zs-oooo
TBSX'ZS xssx-zsmoo
‘v
use the fullewing
To refer to the parts list for a . . . .
sechons . . A
T853
T859
T850 VCO
Novembef 1997 Copyright TEL
Changing the Operating Frequency of the T850 Series”
Overview
Introduction When you receive the T800 module it will be run up and working on a pan
ticular frequency. Sometimes you may want to change the operating fre—
quency. In some cases, when you change the operating frequency, it will
also be necessary to re-tune the radio to ensure correct operation,
_—______._.—.——-—
Purpose of this It IS the purpose of this document to familiarise you with the steps
document involved in changing the operating frequency, checking the radio is still
operating correctly, and how to reAtune the radio when this is not the ease,
—_____._—_—-———
In this document This document covers the following topics:
Topic See page
Selecting a new operating frequency 2
How (0 determine if the T855/856/857 is still operating 3
How to reAlune the T855 4
Configuring the T855 Audio Processor 8
How to re-tune the T856/857 11
Configuring the T8561857 Audio Processor 15
___________________——-——-————
turret? m WW Page l
Changing the Operating Frequency of the T850 Series II
Selecting a new Operating frequency
Description
After changing the
operating frequency
What is the
switching hand?
There are two possible ways of changing the operating frequency:
Method 1 By using a computer running PGMStmwtn nnd
- Changing the default channel in the existing setup
or
- Reprogramming the radio channel frequencies and then select—
ing a default channel
NUI'E: Please refer to the T850 service manual and the PGMSOOWIN
programming manual for funher instruction
Method 2 By uleclinga new channel using the nip switch an the mt ofthe
PCB Bultplane nr sum other form of installed channel change
switch Le. BCD, Intern-ll DIP switch.
_______—__._———
Having changed the operating frequency of the T850 there are two differ-
ent scenarios you will be faced with:
- You will change the frequency and the T850 will continue to operate
correctly. In this case you have changed to a frequency within the
switching band of the radio,
- You will change the frequency and the T850 will not operate or will not
operate correctly. In this case you have changed to a frequency outside
of the switching band.
Note: The radio must now be re~tuned (see “How [0 re—tune the T855" and
“How to re~tune the T856/857"sections).
__—__.___.———
Because of the high RF performance of the T800 series there is a limit to
the amount of frequencies that the radio can switch to before re‘tuning
must occur The limit is referred to as the switching bandwidth.
~ The TBSO Rx can switch up to SMHz.
- The T850 Tx can swttch up to SMHZ.
—____—___.—.———————
t \|tmnMyix<1isito»Rimminunnfl'ithtten mu JK/lfv'l7
Page 2
Changing the Operating Frequency of the T850 Seriesll
So if the T850 is optimally tuned to a centre frequency (which is often the
case when sent from the factory) then the Rx or Tx will be able to switch
half the swrtching band either side of that frequency.
Example
A TSSO receiver has been tuned optimally for 460MHZ. Therefore, its
switching range is 460—1.5MHz to 460+145MH1. 1.e.458.5MHzto
461,5MHZ.
How to determine if the T855/856/857 is still operating
Introduction If the radio was working fine and you want to check that it is still operat-
ing correctly, after changing the operating frequency, follow the steps
listed below
Procedure Follow the steps below to perform a quick check of correct operation.
Step Action
1 Remove the top cover of the module (the side closest to the han-
dle).
2 Connect a high tmpedattce voluneter lo the long lead 0th in the
VCO (lhlS measures the synthesiser loop voltage.
3 Ensure the measured DC voltage is between 3 & 16V.
Note: If the T855 Receiver is not operating this will be indicated by a
slow flashing of the Green Supply light, This should be used as a visual
check followed by the more definitive check given above,
———_—_—__—_
; ‘mvnltvhvmxmpnlrm'm‘y-m il\\0w\r|\ W 3mm: pugC 3
Changing the Operating Frequency of the T850 Series [I
How to re-tune the T855
Introduction The service manual has a section which describes a full Initial Tuning and
Adjustment procedure. This must be used if a repair has been made or
some other major characteristic has been changed. If the only adjustment
made has been to select an operating frequency outside the switching
band, then the steps below should be followed
- Change the operating frequency (refer to page 2).
- Lock the VCO.
- Align the front end,
- Set the noise mute.
- Set the line output level.
The procedure is described on the next page.
______—_._-—-———
Equipment required You will need:
Computer with PGM800Win installed.
T800 programming kit.
TSOO test & calibration unit.
Digital multimeter.
Audio signal generator.
RF signal generator.
Audio voltmeter.
Smad meter.
or
Computer with PGMSOOWin installed.
TSOO programming kit,
TSOO test & calibration unit.
RF test set.
__—____—.__——-—-——
. trot“ V u m MW Page 4
Changing the Operating Frequency of the T850 Series"
How to re-tune the T855 cont
Before you start ' Remove the top cover of the module (the side closest to the handle).
' Set up the test equipment as shown below
Sinifl Mdtu
Meter Vultmailr
«A; o
Lune
RF In
RF Signal
Generator Hemmer Um 6000
External
Modulatmn
‘ Win an at
‘em a, ‘ mum
Connection to camputnt
vta macaw
' Set the jumpers in the audio section of the module as required (see
“Configuring the T855 Audio Processor“ section).
' Connect the computer to the module using the PGMSOOWin program-
ming kit,
Procedure Follow the steps below to re-tune the T855 if the frequency has been
changed and the radio stops operating.
Step Action
Lonk the VCO i
] Connect a high impedance voltmeter to the long lead of L! in lhc
VCO (thts measures the synthesnser loop voltage)
Continued on nexrpage
tm.m...t
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