Anritsu MT8850A User manual

Chapter 1 General
Page 1-0
MT8850A BlueTooth Test Set
Service Manual
Part Number 13000-00116
Rev C

Chapter 1 General
Page 1-1
WARRANTY
The ANRITSU product(s) listed on the title page is (are) warranted against defects in
materials and workmanship for one year from the date of shipment.
ANRITSU's obligation covers repairing or replacing products which prove to be defective
during the warranty period. Buyers shall prepay transportation charges for equipment
returned to ANRITSU for warranty repairs. Obligation is limited to the original purchaser.
ANRITSU is not liable for consequential damages.
LIMITATION OF WARRANTY
The foregoing warranty does not apply to ANRITSU connectors that have failed due to normal
wear. Also, the warranty does not apply to defects resulting from improper or inadequate
maintenance by the Buyer, unauthorised modification or misuse, or operation outside of the
environmental specifications of the product. No other warranty is expressed or implied, and
the remedies provided herein are the Buyer's sole and exclusive remedies.
TRADEMARK ACKNOWLEDGMENTS
V Connector and K Connector are registered trademarks of ANRITSU Company. HP 437B,
HP 438A, Deskjet, and HP 340 Deskjet are registered trademarks of Hewlett-Packard
Company. Adobe Acrobat and Acrobat Reader are trademarks of Adobe Systems
Incorporated. Microsoft Excel and Windows are trademarks of Microsoft Corporation.
NOTICE
ANRITSU Company has prepared this manual for use by ANRITSU Company personnel and
customers as a guide for the proper installation, operation and maintenance of ANRITSU
Company equipment and computer programs. The drawings, specifications, and information
contained herein are the property of ANRITSU Company, and any unauthorised use or
disclosure of these drawings, specifications, and information is prohibited; they shall not be
reproduced, copied, or used in whole or in part as the basis for manufacture or sale of the
equipment or software programs without the prior written consent of ANRITSU Company.

Chapter 1 General
Page 1-2
Notice
The information contained within this document is subject to change without notice.
Anritsu shall not be held liable for any errors or discrepancies contained within this
document, nor for any consequential damages or injury resulting from the installation or
use of the product contained within.
•Windows 95, 98, 2000, and Windows NT are US registered trademarks of Microsoft
Corporation.
•The Bluetooth trademarks are owned by Telefonaktiebolaget L M Ericsson,
Sweden.
•Adobe Acrobat and Acrobat Reader are trademarks of Adobe Systems
Incorporated.
For Safety
Always refer to the operation manual when working near locations at
which the alert mark, shown on the left, is attached. If the operation is
performed without heeding the advice in the operation manual, there is a
risk of personal injury. In addition, the equipment performance may be
reduced. This alert mark is sometimes also used with other marks and
descriptions indicating other dangers.
When supplying AC power to this equipment, connect the accessory 3-
pin power cord to a 3-pin grounded power outlet. If a grounded 3-pin or
outlet is not available, use a conversion adapter and ground the green
wire, or connect the frame ground on the rear panel of the equipment to
ground. If power is supplied without grounding the equipment, there is a
risk of receiving a severe or fatal electric shock.
WARNING The operator must not attempt to repair this equipment. Do not attempt
to remove the equipment covers or to disassemble internal components.
Only qualified service technicians with knowledge of electrical fire and
shock hazards should service this equipment. There are high-voltage
parts in this equipment presenting a risk of severe injury or fatal electric
shock to untrained personnel. In addition, there is a risk of damage to
precision components.

Chapter 1 General
Page 1-3
Safety Symbols
To prevent the risk of injury or loss related to equipment malfunction, Anritsu Company
uses the following symbols to indicate safety-related information. For your own safety,
please read this information carefully before operating the equipment.
Symbols used in Anritsu documentation
Danger Indicates a very dangerous procedure that could result in serious injury or
death if not performed properly.
Warning Indicates a hazardous procedure that could result in serious injury or death if not
performed properly.
Caution Indicates a hazardous procedure or danger that could result in light-to-severe injury,
or loss related to equipment malfunction, if proper precautions are not taken.
Safety symbols used on equipment and in associated documentation
Some or all of the following symbols may be used on Anritsu equipment. In addition,
there may be other labels attached to products that are not shown in the diagrams in
this manual.
The following safety symbols are used inside or on the equipment near operation
locations to provide information about safety items and operation precautions. Ensure
that you clearly understand the meanings of the symbols and take the necessary
precautions before operating the equipment.
This symbol indicates a prohibited operation. The prohibited operation is
indicated symbolically in or near the barred circle.
This symbol indicates a compulsory safety precaution. The required
operation is indicated symbolically in or near the circle.
This symbol indicates warning or caution. The contents are indicated
symbolically in or near the triangle.
This symbol indicates a note. The contents are described in the box.
These symbols indicate that the marked part should be recycled.

Chapter 1 General
Page 1-4

Chapter 1 General
Page 1-5
Table of Content
Chapter 1 - General Information Page
1-1 Scope of This Manual ............................…………… 1- 9
1-2 Introduction ...........................…………………...…… 1- 9
1-3 Related Manuals..............................……………..… 1- 9
1-4 Identification Number.........................………….…… 1- 9
1-5 Models, Options, And Accessories .................…..… 1-10
1-6 Service Policy ...............................……………….… 1-10
1-7 Spare Parts Listing .............................………………. 1-10
1-8 Component Handling ..........................……………… 1-11
Chapter 2 - Performance Verification
2-1 Introduction ...............................………………..….… 2-1
2-2 Test Conditions .........................…………...………… 2-1
2-3 Description of the verification procedure ……..….…. 2-1
2-4 Recommended Test equipment.............................… 2-2
2-5 Test Station set up ...........................………………… 2-3
2-6 Verification Procedure using Test Station ..............… 2-4
2-7 Partial Manual Verification Procedure ….…………… 2-4
Chapter 3 - Calibration Procedures
3-1 Introduction .............................………….....……….. 3-1
3-2 Recommended Test Equipment ............…………… 3-1
3-3 Test Conditions ...............................………..……… 3-1
3-4 Calibration Test Set up.…………….………..……… 3-2
3-5 Test Station Operation…..................………..……… 3-3
3-6 Calibration Procedure .....................………..……… 3-3
3-7 Internal 10MHz Reference Adjustment....….……… 3-4

Chapter 1 General
Page 1-6
Chapter 4 - Theory Of Operation Page
4-1 Introduction ................……..................……….…… 4-1
4-2 Product Overview .............…...............……….…… 4-1
4-3 General Operation ……………............….....…....... 4-2
4-4 Overall Block Diagram.......….……………….…...... 4-3
4-5 Radio PCB …………………..…......................…..... 4-4
4-6 Main Processor PCB …………………………….….. 4-6
4-7 Human Interface........………………....…...........…. 4-8
4-8 GPIB Operation ..............………………....….....….. 4-8
4-9 Case Construction ………………......................…... 4-8
4-10 Internal Construction ........………………....….…..... 4-9
4-11 Front Panel ……………....……………........……...... 4-9
4-12 Front Panel Connectors ..........……………...…....... 4-10
4-13 Rear Panel Connectors .................…………….….. 4-10
4-14 Power Supply Operation .................…………..…… 4-11
Chapter 5 - Firmware Updates
5-1 Introduction ...................................……………..…… 5-1
5-2 Code Loader Program ...…………................…........ 5-1
5-3 Bootload Mode ..............…………….….........…....... 5-3
5-4 Serial Interface Cable .....................….…………….. 5-5
5-5 How to change the unit serial number ……………… 5-6

Chapter 1 General
Page 1-7
Chapter 6 –Troubleshooting Page
6-1 Introduction ...............................……………………... 6-1
6-2 Trouble Shooting Flow Diagram ………………………6-2
6-3 DC supplies ….………………………………………… 6-3
6-4 Front Panel and Display .……….............................… 6-4
6-5 Transmitter Output Level and Frequency Accuracy…6-4
6-6 Transmitter Output Level Control ….……………..….. 6-6
6-7 Transmitter Attenuator Control....…..………………….6-6
6-8 Transmitter Modulation ………………………….……. 6-7
6-9 Transmitter Phase noise..………………………….…. 6-9
6-10 Receiver I/F Signal & Frequency Accuracy …………6-11
6-11 Receiver RF Level ……………………………………..6-13
6-12 Receiver Phase noise ………………………………… 6-15
6-13 Receiver Demodulation ……………………………… 6-16
6-14 Dirty Transmitter ……………………………………… 6-20
6-15 EUT Serial Control DUT BlueTooth Device………… 6-23
6-16 GPIB operation ……………………………………….. 6-25
6-17 RS232 Port ……………………………………………..6-25
6-18 Rear Panel BNC Connectors ……………………….. 6-26
6-19 Transmitter Modulation Index ………………………. 6-29
6-20 Transmitter Harmonics and Spurious ………………. 6-30
6-21 Receiver Frequency Accuracy ………………………. 6-32
6-22 BlueTooth Measurements ……………………………. 6-33
Chapter 7 - Removal and Replacement Procedures
7-1 Introduction ............................……………………....... 7-1
7-2 Complete Unit Disassembly .........……………………. 7-2
7.2.1 Main Radio PCB ............…………………...... 7-2
7.2.2 Main Control PCB............…………………...... 7-3
7.2.3 Front Panel assembly……………......…......... 7-6
7.2.4 Rear Panel assembly ......................…........... 7-7
7.2.5 Power Supply ................………………........... 7-8
7.2.6 Cable Location During Assembly ……………. 7-9

Chapter 1 General
Page 1-8
Chapter 8 – Service Mode Page
8-1 Introduction ..............................……………………...… 8-1
8-2 Accessing Service Mode ...........................…….….…. 8-1
8-3 Menu Functions Described ………………………..….. 8-1
Chapter 9 – Self Test Messages Page
9-1 Introduction ..............................……………………...… 9-1
9-2 Self Test Messages …………………………………….. 9-1
Appendix A - Connector Care And Handling
A-1 Introduction .................................…………………..…. A-1
A-2 Connector Care and Handling .....................……..….. A-1
Appendix B – Calibration and Verification Test Station
B-1 Information ..............................………………….....…. B-1
Appendix C – Calibration of the MS8604A
C-1 Information ..............................………………….....…. C-1

Chapter 1 General
Page 1-9
Chapter 1
General Information
1-1 SCOPE OF THIS MANUAL
This manual provides general information, performance verification,
calibration, theory of operation and service information for the ANRITSU
MT8850A BlueTooth Test Set.
Figure 1-1. MT8850A BlueTooth Test Set
1-2 INTRODUCTION
This chapter provides information on other related manuals, the unit
identification number, instrument options, service policies, and
component handling precautions.
1-3 RELATED MANUALS
This manual is one of a three manual set consisting of this Maintenance
Manual, the MT8850A BlueTooth Test Set Operation Manual
(ANRITSU part number 13000-000109) and the MT8850A Remote
Programming Manual (ANRITSU part number 13000-000110) .
These manuals are available on CD ROM as Adobe Acrobat™ (*.pdf)
files. The files can be viewed using Acrobat Reader™, a freeware pro-gram
provided on the CD ROM. For price and availability, contact the
nearest ANRITSU Customer Service Centre
1-4 IDENTIFICATION NUMBER
The MT8850A Series ID number is affixed to the rear panel. Please
use the complete ID number when ordering parts or corresponding
with the ANRITSU Customer Service department.

Chapter 1 General
Page 1-10
1-5 MODELS, OPTIONS, AND ACCESSORIES
The MT8850A BlueTooth Test Set is available with options, and accessories
are listed be-low.
Options
Model No. Option
MT8850A-01 Rack Mount, single unit
MT8850A-03 Rack Mount, side-by-side
MT8850A-10 Antenna for off air connection.
MT8850A-20 Extra 1 off EUT RS232 Cable
MT8850A-30 Extra 1 off Operating Manual
MT8850A/98 Z540 Calibration
MT8850A/99 Premium Calibration includes Z540
Part No. Item
760-206 Hard Sided Transit Case
D41310 Soft Sided Carry Case with shoulder strap
B41323 Serial Interface Cable
1-6 SERVICE POLICY
The service policy is to supply exchange assemblies or complete units as
required. Fault finding to module level is detailed in this manual.
All main sub assemblies in the unit will be available as service parts. This
manual details removal and replacement. Calibration, verification and trouble
shooting of the BlueTooth Test Set MT8850A unit.
1-7 SPARE PARTS LISTING
The following spare parts are available for the MT8850A Test Set.
Refer to Chapter 7 for Removal and Replacement procedures. Contact your
nearest Anritsu Customer Service or Sales Centre for price and availability
information.
ND50264 Radio PCB Assy, MT8850A
ND50265 Control PCB Assy, MT8850A
ND50266 Top Case Assy
ND50267 Bottom Case Assy
ND50268 Front Panel Assy, MT8850A
ND50269 Rear Panel Assy (Includes BNC connectors and cables)
50069 Power Supply Assy
Other spare parts may be available from the factory on request.

Chapter 1 General
Page 1-11
MT8850A

Chapter 1 General
Page 1-12

Chapter 2 Verification Procedures
Page 2-1
2-1 INTRODUCTION
Performance of the Anritsu MT8850A BlueTooth Test Set can be verified using
a Test Station defined by Anritsu EMD. Some of the equipment required must be purchased
from Anritsu EMD but most of the equipment is standard Anritsu Products. See Table 2 for full
equipment list. This chapter presents information on the Test Equipment/ Test Station, test
conditions, and the verification procedure. Verification should be performed :-
Once a year (recommended).
After Test Station calibration
After the unit has been disassembled and reassembled with or without parts
changed.
2-2 TEST CONDITIONS
All tests must be performed at a temperature of 20° C (68° F) ± 15°C and a
relative humidity of less than 90%, non-condensing.
Prior to making any precision measurements, allow all the Test Equipment and
the MT8850A to warm up for a period of 30 minutes from power on. If the
power supply is interrupted for any reason, allow a similar settling period.
2-3 DESCRIPTION OF THE VERIFICATION
The performance of the ANRITSU MT8850A BlueTooth Test Set can be fully verified using
the Test Station. Verification can be performed by a manual method. Both methods use the
same principle which is described in general terms below.
The MT8850A Radio Test Set can be split into three basic sections :-
1. Transmitter Operation.
2. Receiver Operation.
3. BlueTooth (BT) Operation.
The verification of each section is described below :-
1. Transmitter Operation
Frequency Accuracy :-
C.W. (Carrier Wave) Channel accuracy.
Level Accuracy:-
C.W. RF output level accuracy.
Level Flatness :-
Difference between Max channel RF power and Min channel RF power across
the 2.402GHz to 2.478GHz BlueTooth band.
2. Receiver Operation
Level Measurement Accuracy :-
RF is applied to the RF from +12dBm to –35dBm.
Level Measurement Flatness :-
RF is applied at different levels to test the ranges of the receiver across the BT
frequency band.
3. BlueTooth Bit and Frame Rate Error (single Slot)
This measurement requires another Standard BT device. A MT8850A can be used to
perform this function.

Chapter 2 Verification Procedures
Page 2-2
2-4 RECOMMENDED TEST EQUIPMENT
The following Test Station equipment is required to perform the procedures in this
chapter.
Instrument Critical Specification Recommended
Manufacturer/Model
Use
PC Win 95/98/2000 with
National Instruments GPIB Card
Any suitable part A,P,T
Test Programme Part Number 50104. Installation
Disk Part No 2300-257
Anritsu A,P,T
Frequency Counter High Accuracy Reference Anritsu MF2412B opt 2 or 3 A,P,T
Power Meter +20 to –60dBm, 0.1-3GHz Anritsu ML2437A A,P,T
Power Sensor +20 to –60dBm, 0.1-3GHz Anritsu MA2472A A,P,T
Signal Generator 10MHz to 3.0GHz,
+17 to –35dBm
Anritsu MG3681A
(No options required)
A,P,T
Modulation Meter BlueTooth Modulation
frequency deviation 250-
400KHz Peak to peak
Anritsu MS8604A (requires
calibration against a traceable
source e.g. Roden Schwarz
SMIQ)
A,P,T
BlueTooth Radio Operate as a slave and perform
Single Slot Bit/Frame Rate error
test.
Anritsu MT8850A A,P,T
20dB Directional Coupler 1-3GHz 20dB side arm Anritsu Part No 50283 A,P,T
1 Serial Cable Null Modem Anritsu Part No B41323 A,P,T
1 x 2 Metre RF Cable Flexible, max loss at 2.5GHz
2.5dB, N (m) to N(m)
Any Suitable part A,P,T
5 x 1 Metre GPIB Cable Standard Anritsu Part No 2100-1 A,P,T
1 x 2 Metre GPIB Cable Standard Anritsu Part No 2100-1 A,P,T
1 x Scope Probe Standard, BNC (m) to probe Any suitable part A,P,T
RF adapters As required Any suitable part A,P,T
Spectrum Analyser 0-12.5GHz,+10dBm to –60dBm Anritsu MS2602A P,T
Digital Multi-Meter DMM 6.5 digits, DC, AC volts
and Ohms
HP 34401A T
Oscilloscope 20MHz Bandwidth or better, 2
input
Any suitable part T
EUT RS232 Serial Cable Serial Cable Anritsu Part 50052 P,T
2 x 2 Metre BNC (m) to
BNC (m)
Standard Any suitable part A,P,T
Adapter M Female to N Female 50 Ohm 34NFNF50 P
Table 2-1. Required Test equipment
P = Performance Verification
A = Adjustments
T = Trouble shooting

Chapter 2 Verification Procedures
Page 2-3
2-5 Verification Test Station Set Up
Connect Frequency Counter 10MHz reference output to the Signal Generator and the
Modulation Meter 10MHz reference inputs or use a suitable external 10MHz reference for all
equipment.
20dB Coupler
Part No 50283
SIG GEN MG3861A
PWR MTR
ML24XXA
MOD
METER
MS8604A
COUNTER
MF2412B
MT8850A
Test Set
RF CABLES
PC Com Port To RS232 Conn
PWR SENSOR
MA2472A
GPIB CABLES
Figure 2-1

Chapter 2 Verification Procedures
Page 2-4
2-6 Verification Procedure Using The Test Station.
1. Connect the MT8850A under test to the test station.
2. Allow all the equipment to warm up for approximately 30 minutes.
3. Run the Test station program. Select the Verification Section.
4. Follow the on screen prompts
2-7 Manual Verification Procedure.
Transmitter
C.W. (Carrier Wave) Frequency Accuracy.
Equipment Connection
Procedure :
1. Set the MT8850A transmitter to channel 0 with the RF output enabled. Use the signal
generator function to do this. (Press “Config”, highlight MT8850A using up/down data key
pad arrows and press select, Select “Signal generator mode”. Set as below shown :-
Pattern CW
RF Power ON
channel frequency 2492 MHz
Mod Index 0.32
Sig Gen pwr lvl 0.0 dBm
Now press the soft key marked “enable”
2. Set the counter to Input 2 and a resolution of 1Hz.
3. Confirm the counter read 2.492GHz +/-1.25KHz. Record the reading in Table 2-2 at the end
of this chapter.
MT8850A BT
Test Set
MF2412B Counter
Opt 2 fitted

Chapter 2 Verification Procedures
Page 2-5
Transmitter
Power level accuracy
Connection
Procedure
1. Set the MT8850A transmitter to channel 0 with the RF output enabled. Use the signal
generator function to do this. Press “Config”, highlight MT8850A using up/down data key
pad arrows and press select, Select “Signal generator mode”. Set as shown below :-
Pattern CW
RF Power ON
channel frequency 2402MHz
Mod Index 0.32
Sig Gen pwr lvl -80.0 dBm
Now press the soft key marked “enable”
2. Perform a zero cal on the Power Meter with the sensor connected the Power Meter RF
output.
3. Connect the sensor to the MT8850A RF input /output..
4. Perform a zero on the Power Meter.
5. Set the Power Meter Cal factor to the a frequency of 2.4GHz.
6. Set the MT8850A Tx Power Level to the first value shown in Table 2-3.
7. Record the Power Meter read in a copy of Table 2-3. Confirm the level is within
specification.
8. Repeat for all the levels detailed in Table 2-3.
MT8850ABTRADIOTESTSET
POWER
SENSOR
MA2472A
POWER METER ML24XXA

Chapter 2 Verification Procedures
Page 2-6
Transmitter
Power level flatness
Connection
As for Power Level accuracy
Procedure
1. Set the MT8850A transmitter to channel 0 with the RF output enabled. Use the signal
generator function to do this. Press “Config”, highlight MT8850A using up/down data key
pad arrows and press select, Select “Signal generator mode”. Set as shown below :-
Pattern CW
RF Power ON
channel frequency 2402MHz
Mod Index 0.32
Sig Gen pwr lvl -80.0 dBm
Now press the soft key marked “enable”
2. Perform a zero cal on the Power Meter with the sensor connected the Power Meter RF
output.
3. Connect the sensor to the MT8850A RF input /output..
4. Perform a zero on the Power Meter.
5. Set the MT8850A Power Level to 0dBm.
6. Set the Power Meter Cal factor to a frequency of 2.40GHz.
7. Record the Power Meter read in a copy of Table 2-4.
8. Set the MT8850A to a frequency of 2440MHz.
9. Set the Power Meter Cal factor to the a frequency of 2.44GHz.
10. Record the Power Meter read in a copy of Table 2-4.
11. Set the MT8850A to a frequency of 2478MHz.
12. Set the Power Meter Cal factor to the a frequency of 2.48GHz.
13. Record the Power Meter read in a copy of Table 2-4.
14. Confirm that the difference between the highest and lowest values recorded is within
specification.
15. Exit “MT8850A signal generator” mode by pressing the “exit” soft key.

Chapter 2 Verification Procedures
Page 2-7
Receiver
Note : This section can only be performed if the MT8850A has version 1.10 firmware or above
installed.
Receiver Level and Flatness Accuracy
Connection
Procedure
1. Press “Config”. Select “MT8850A” and press select.
2. Select “CW Measurement” and press select.
3. Press the “enable” soft key.
4. Perform a zero cal on the Power Meter with the sensor connected the Power Meter RF
output.
5. Connect the sensor to the output end of the cable connected to the Signal Generator.
Use an N to N female adapter 34NFNF50 to do this.
6. Set the signal generator to CW output at 2.402GHz level +10dBm.
7. Turn the Signal Generator RF output off.
8. Perform a zero on the Power Meter.
9. Set the Cal factor of the Power Meter to a frequency of 2.40GHz.
10. Turn the Signal Generator RF output on.
11. Repeat the above for all the Power levels listed in Table 2-5. Record the PM levels.
12. Disconnect the Power Sensor.
13. Connect the cable to the RF input of the MT8850A.
14. Set the Signal Generator to the power level listed in Table 2-5. Record the MT8850A
Result : Power in Table 2-5.
15. Repeat for all the levels in Table 2-5.
16. The level accuracy is the difference between the Power Meter reading and the MT8850A
reading. Calculate all these values and confirm they are in specification.
Signal Generator
MG3681A
MT8850A BT
Test Set
Power Meter
ML24XXA
Power Sensor
MA2472A