Tektronix DSA8300 Digital Serial Analyzer,Modules Service

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DSA8300

ZZZ

Digital Serial Analyzer and Modules

Service Manual

*P077057200*

077-0572-00

DSA8300

ZZZ

Digital Serial Analyzer and Modules

Service Manual

www.tektronix.com

077-0572-00

Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions.

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Speciﬁcations and price change privileges reserved.

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

Contacting Tektronix

Tektronix, Inc. 14150 SW Karl Braun Drive P.O. B o x 5 0 0 Beaverto USA

For product information, sales, service, and technical support:

n, OR 97077

In North America, call 1-800-833-9200. Worl dwid e, visi t www.tektronix.com to ﬁnd contacts in your area.

Warranty

Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product. Parts, modules and replacement products used by Tektronix for warranty work may be n the property of Tektronix.

ew or reconditioned to like new performance. All replaced parts, modules and products become

In order to o the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage result b) to repair damage resulting from improper use or connection t o incompatible equipment; c) to repair any damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modiﬁed or integrated with other products when the effect of such modiﬁcation or integration increases the time or difﬁculty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

TRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE

TEK AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

[W2 – 15AUG04]

btain service under this warranty, Customer must notify Tektronix of the defect before the expiration of

ing from attempts by personnel other than Tektronix representatives to install, repair or service the product;

Table of Contents

General Safety Summary ......................................................................................... vi

Service Safety Summary.............. .................................. ................................ ......... viii

Preface .............................................................................................................. ix

Related Documentation ....................................................................................... x

Operating Information

Operating Information ........................................................................................... 1-1

Windows Safe Mode ........... .................................. ................................ ........... 1-1

Where to Find User Information ........................................................................... 1-1

Theory of Operation

Theory of Operation............................... ................................ ............................... 2-1

Mainframe Overview........................................................................................ 2-2

Electrical Sampling Modules .............................. ................................ ................. 2-4

Optical Sampling Modules ...... ................................ .................................. ......... 2-6

80A01 Trigger Prescale Preampliﬁer Module .......................................................... 2-13

80A02 EOS/ESD Protection Module.................................................................... 2-14

80A05 Electrical Clock Recovery Module.............................................................. 2-14

82A04 Phase Reference Module......................................................................... 2-15

Adjustment Procedures

Adjustment Procedures .......................................................................................... 3-1

Required Equipment.............................. ................................ ........................... 3-1

Equipment Hookup............. ................................ ................................ ............. 3-2

Main Instrument Adjustments ........................... .................................. ................. 3-2

DC Calibrator Adjust ................................................................................... 3-2

DC Calibrator Adjust Veriﬁcation..................................................................... 3-3

Internal 10 MHz Adjust ................... .................................. ........................... 3-4

Maintenance

Maintenance....................................................................................................... 4-1

Preventing ESD .............................................................................................. 4-1

Inspection and Cleaning........................ ................................ ............................. 4-1

Removal and Installation ............... ................................ .................................. ....... 4-5

Required Equipment.............................. ................................ ........................... 4-5

External Assemblies......................................................................................... 4-6

Line Fuses and AC Power Cord....................................................................... 4-7

DSA8300 Digital Serial Analyzer and Modules Service Manual i

Table of Contents

Front-Panel Kn

Trim and Carrying Handle ............................................................................. 4-9

Bottom Cover............................... ................................ ........................... 4-10

Left and Right Covers ................................................................................ 4-10

Internal Assemblies................... ................................ .................................. ... 4-11

Front-Panel Assembly................. ................................ ............................... 4-12

Front Panel Board..................................................................................... 4-13

Front Panel Keypad............................................ ................................ ....... 4-14

Display Assembly.................................. ................................ ................... 4-14

Display Adapter Board ............................................................................... 4-16

Standby/On Switch Flex Circuit .................................................................... 4-18

USB Assembly........................................................................................ 4-19

Hard Disk Drive....................................................................................... 4-20

CD-RW/DVD Drive Assembly...................................................................... 4-22

CD-RW/DVD and Hard Disk Drive Mounting Frame............................................ 4-24

ATX Assembly ........................................................................................ 4-25

Power PC Board............................ ................................ ........................... 4-28

Power Side Board ........................ ................................ ............................. 4-30

Bridge Board ................. ................................ .................................. ....... 4-30

Fan Assembly ......................................................................................... 4-31

Low-Voltage Power Supply....................... .................................. ................. 4-33

Module Slot Doors................................... ................................ ................. 4-40

Electrical Sampling Modules .............................. ................................ ............... 4-45

Optical Sampling Modules ...... ................................ .................................. ....... 4-48

80A00 and 82A00 Series Modules ............... ................................ ....................... 4-48

Troubleshooting................................................................................................. 4-50

Required Equipment....................................................................................... 4-50

Check for Common Problems............................................................................ 4-50

Isolating Failures to the 80E0X/80C0X Modules or the Mainframe................ ................. 4-53

Isolating to a Board If Power Will Not Come Up................... .................................. . 4-54

Checking the Power Supply Voltages ................................................................... 4-55

PPC and ATX PC Diagnostics................. .................................. ......................... 4-56

BIOS Beep Codes................................. .................................. ....................... 4-57

Firmware Updates ......................................................................................... 4-58

After Repair ................... ................................ ................................ ............. 4-58

Installing the Instrument Model and Serial Number .... . ..... . ..... ..... . ..... . ..... . .... . ..... . ..... . 4-59

Repackaging Instructions ...................................................................................... 4-60

obs..... ................................ ................................ ................. 4-8

Replaceable Parts L ist

Replaceable Parts List............................................................................................ 5-1

ii DSA8300 Digital Serial Analyzer and Modules Service Manual

List of Figures

Figure 2-1: DSA8300 block diagram .......................................................................... 2-2

Figure 4-1: External assemblies ............. ................................ .................................. . 4-6

Figure 4-2: Knob removal........ ................................ .................................. ............. 4-8

Figure 4-3: Internal assemblies ............................................................................... 4-11

Figure 4-4: J1 ﬂex cable connector removal ................................................................ 4-13

Figure 4-5: Display assembly removal........................ ................................ ............... 4-16

Figure 4-6: Display adaptor board removal ................................................................. 4-17

Figure 4-7: Display adaptor board replacement............................ ................................ . 4-18

Figure 4-8: USB assembly removal .......................................................................... 4-19

Figure 4-9: Hard disk drive removal ......................................................................... 4-21

Figure 4-10: CD-RW/DVD assembly removal............... ................................ ............... 4-22

Figure 4-11: CD-RW/DVD drive removal................................................................... 4-23

Figure 4-12: Hard drive and CD-RW/DVD drive mounting frame removal............................. 4-25

Figure 4-13: ATX assembly removal.................................... ................................ ..... 4-27

Figure 4-14: Power PC board removal....................................................................... 4-29

Figure 4-15: Fan assembly removal ................... ................................ ....................... 4-32

Figure 4-16: Acquisition System ............................................................................. 4-35

Figure 4-17: T-10 screws and threaded posts....................... .................................. ....... 4-36

Figure 4-18: Module slot door removal......................................... ............................. 4-41

Figure 4-19: Module ejector handles removal .............................................................. 4-43

Figure 4-20: Spring arm position ..... . ..... . ..... . ..... . ..... . ... . . . .... . . .... . ..... . ..... . ..... . ..... . ..... . 4-44

Figure 4-21: Sample of electrical module hardware removal ............................................. 4-46

Figure 4-22: 80A00 and 82A00 series parts removal (80A01 shown) ................................... 4-49

Figure 4-23: Location of debug pins ...... ................................ .................................. . 4-54

Figure 5-1: External parts ............ ................................ .................................. ......... 5-5

Figure 5-2: Drives... ................................ ................................ ............................. 5-7

Figure 5-3: Front panel and processors ........................................................................ 5-9

Figure 5-4: ATX assembly ......... ................................ ................................ ........... 5-11

Figure 5-5: Power supply...................................................................................... 5-13

Figure 5-6: Acquisition system ... . . . .... . ..... . ..... . ..... . ..... . ..... ..... . ..... . ..... . ..... . ..... . ... . . . ... 5-15

Figure 5-7: Time base delay cables........................................................................... 5-16

Figure 5-8: Electrical front end cables....................................................................... 5-17

Figure 5-9: Optical front end cables............................. .................................. ........... 5-18

Figure 5-10: 80E01, 80E02, 80E03, and 80E04 modules................................... ............... 5-20

Figure 5-11: 80E05 module (Option 10G shown) .......................................................... 5-21

Figure 5-12: 80E06 module ................ .................................. ................................ . 5-22

Figure 5-13: 80E07, 80E08, 80E09, and 80E10 modules................................... ............... 5-23

Figure 5-14: Optical modules................................................................................. 5-24

Figure 5-15: 80A01 module................................................................................... 5-25

DSA8300 Digital Serial Analyzer and Modules Service Manual iii

Table of Contents

Figure 5-16: 82

Figure 5-17: 80A06 module................................................................................... 5-28

A04 module................................................................................... 5-26

iv DSA8300 Digital Serial Analyzer and Modules Service Manual

List of Tables

Table 4-1: Required equipment for Removal and Replacement............................................. 4-5

Table 4 -2: P

Table 4-3: BIOS beep codes................................................................................... 4-57

Table 4-4: Action required for assembly replaced ............................... ........................... 4-58

Table 5-1: Mainframe cable connections ...................................................................... 5-3

Table 5-2: External replaceable parts ......... ................................ ................................. 5-4

Table 5-3: Drives replaceable parts...................... ................................ ....................... 5-6

Table 5 -4

Table 5-5: ATX assembly replaceable parts list............................................................. 5-10

Table 5-6: Power supply replaceable parts list ....................... .................................. ..... 5-12

Table 5-7: Acquisition system replaceable parts list..... . ..... . ... . . ..... . ..... . .... . ..... . ..... . ... . . ..... 5-14

Table 5-8: Time Base delay cables replaceable parts list ................... ............................... 5-16

Table 5-9: Electrical Front End cables replaceable parts list ......... ................................ ..... 5-17

Table

Table 5-11: 80E01, 80E02, 80E03, and 80E04 modules replaceable parts list ................... ....... 5-19

Table 5-12: 80E05 module replaceable parts list ........................................................... 5-21

Table 5-13: 80E06 module replaceable parts list ........................................................... 5-22

Table 5-14: 80E07, 80E08, 80E09, and 80E10 modules replaceable parts list .......................... 5-23

Table 5-15: Optical modules replaceable parts list ......................................................... 5-24

ble 5-16: 80A01 module replaceable parts list ........................................................... 5-25

Table 5-17: 80A04 module replaceable parts list ........................................................... 5-26

Table 5-18: 80A06 module parts list ......................................................................... 5-27

ossible causes of instrument failure............................................................ 4-50

: Front panel and processors replaceable parts list................................................. 5-8

5-10: Optical Front End cables replaceable parts list ............................................... 5-18

Table of Contents

DSA8300 Digital Serial Analyzer and Modules Service Manual v

General Safety Summary

General Safet

To Avoid Fire or Personal

Injury

ySummary

Review the fo this product or any products connected to it.

To avoid pot

Only qualiﬁed personnel should perform service procedures.

While using this product, you may need to access other parts of a larger system. Read the safety sections of the other component manuals for warnings and cautions r

Use proper power cord. Use only the power cord speciﬁed for this product and certiﬁed for the country of use.

Connect and disconnect properly. Do not connect or disconnect probes or test leads while they are connected to a voltage source.

Ground the product. This product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded.

llowing safety precautions to avoid injury and prevent damage to

ential hazards, use this product only as speciﬁed.

elated to operating the system.

Observe all terminal ratings. To avoid ﬁre or shock hazard, observe all ratings and markings on the product. Consult the product manual for further ratings information before making connections to the product.

The inputs are not rated for connection to mains or Category II, III, or IV circuits.

Do not apply a potential to any terminal, including the common terminal, that exceeds the maximum rating o f that terminal.

Power disconnect. The power switch disconnects the product from the power source. See instructions for the location. Do not block the power switch; it must remain accessible to the user at all times.

Do not operate without covers. Do not operate this product with covers or panels removed.

Do not operate with suspected failures. If you suspect that there is damage to this product, have it inspected by qualiﬁed service personnel.

Avoid exposed circuitry. Do not touch exposed connections and components when power is present.

Use proper fuse. Use only the fuse type and rating speciﬁed for this product.

Wear eye protection. Wear eye protection if exposure to high-intensity rays or

laser radiation exists.

vi DSA8300 Digital Serial Analyzer and Modules Service Manual

General Safety Summary

TermsinThisManual

Symbols and Terms on the

Product

Do not operate i

Do not operate in an explosive atmosphere.

Keep product surfaces clean and dry.

Provide prop

on installing the product so it has proper ventilation.

These terms may appear in this manual:

WAR NI NG .

in injury or loss of life.

CAUTION

damage to this product or other property.

These t

erms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the ma

n wet/damp conditions.

er ventilation. Refer to the manual's installation instructions for details

Warning statements identify conditions or practices that could result

. Caution statements identify conditions or practices that could result in

rking.

WARNING indicates an injury hazard not immediately accessible as you

the marking.

read

CAUTION indicates a hazard to property including the product.

The following symbol(s) may appear on the product:

DSA8300 Digital Serial Analyzer and Modules Service Manual vii

Service Safety Summary

Service Safet

y Summary

Only qualiﬁe Safety Summary and the General Safety Summary before performing any service procedures.

Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering ﬁrst aid and resuscitation is present.

Disconnect Power. To avoid electric shock, switch off the instrument power, then disconnect the power cord from the mains power.

Use Care When Servicing With Power On. Dangerous voltages or currents may exist in disconnect test leads before removing protective panels, soldering, or replacing components.

To avoid electric shock, do not touch exposed connections.

d personnel should perform service procedures. Read this Service

this product. Disconnect power, remove battery (if applicable), and

viii DSA8300 Digital Serial Analyzer and Modules Se rvice Manual

Preface

This is the service manual for the DSA8300 Digital Serial Analyzer and the modules that install in the instrument (except for the 80A03 module).

Manual Structure

Manua

l Conventions

NOTE. The 80

servicing information.

Read this p andwhereyoucanﬁnd other information related to servicing this product. Read the Introduction following this preface for safety and other important background information needed before servicing this product.

This manual is divided into sections, whic h are made up of related subordinate topics. These topics can be cross referenced as sections.

Be sure to read the introductions to all procedures. These introductions provide important information needed to do the service correctly, safely, and efﬁciently.

This manual uses certain conventions that you should become familiar with before beginning service.

A03 instruction manual contains its own speciﬁcations and

reface to learn how this manual is structured, what conventions it uses,

emblies and Modules

Ass

Replaceable Parts

Safety

DSA8300 Digital Serial Analyzer and Modules Service Manual ix

Throughout this manual, the term assembly appears. An assembly is composed of electrical and mechanical assemblies, circuit c ards, interconnecting cables, and a user-accessible front panel. References to an assembly are different

an references to a module such as “Sampling modules,” “Phase Reference

th modules,” or “Accessory modules,” which are products installed in the instrument compartments.

This manual refers to any ﬁeld-replaceable assembly or mechanical part by its name or generically as a replaceable part. In general, a replaceable part is any circuit board or assembly, such as a hard disk drive, or a mechanical part, such as I/O port connectors, that is listed in the replaceable parts list.

Symbols and terms related to safety appear in the General Safety Summary and the Service Safety Summary found at the beginning of this manual.

Preface

Related Documentation

The following documents relate to the instruments this service manual supports:

DSA8300 Quick Start User manual. Tektronix part number 071-2897-XX. This document also contains speciﬁcation changes when using the 82A04 Phase Reference module.

DSA8300 Speciﬁ cations and Performance Veriﬁcation manual. Tektronix part number 077-0571-XX.

DSA8300 Online Help. An online document accessed from the instrument Help menu.

DSA8300 Programmer Guide. An online document accessed from the instrument Help menu.

80E01, 80E02, 80E03, 80E04, and 80E06 Electrical Sampling Modules User manual. Tektronix part number 071-0434-XX.

80E07, 80E08, 80E09, and 80E10 Electrical Sampling Remote Modules User manual. Tektronix part number 071-2038-XX.

80C00 Series Optical Sampling Modules User manual. Tektronix part number

071-0435-XX.

80A01 Trigger Prescale Limiting Preampliﬁer Module User manual.

Tektronix part number 071-0873-XX.

80A02 EOS/ESD Protection Module Instructions. Tektronix part number 071-1317-XX.

80A03 TekConnect Probe Interface Module Instructions. Tektronix part number 071-1298-XX.

80A05 Electrical Clock Recove ry Module User manual. Tektronix part number 071-1467-XX.

82A04 Phase Reference Module User manual. Tektronix part number 077-0345-XX.

Rackmount Kit Instructions. Te ktronix part number 071-0696-XX.

TDR Z-Meas Application Online Help. Ships with this product on a separate

disc. Provides information about this TDR Impedance Measuring application that implements the TDR calibration procedures speciﬁed by the IPC TM-650 test method.

Fast NRZ Application Online Help. Ships with this product on a separate disc. Provides information about this application that improves throughput for optical eye-pattern mask testing.

x DSA8300 Digital Serial Analyzer and Modules Service Manual

Operating Information

CAUTION. Keep the bottom of the instrument clear of obstructions to allow proper

cooling.

Windows Safe Mode

If the instrument is turned off before the operating system boots, or if you’ve installed a third-party product with a driver that is not compatible with the instrument start-up, Windows will open in Safe mode. The touch screen will not operate; you must install the standard-accessory keyboard and mouse. Information about ins Tektronix part number 071-2897-00.

talling these accessories is in the DSA8300 Quick Start User Manual,

When you

have removed any barrier to Windows start-up, you can reboot. If the instrument no longer boots to Safe mode, you can remove the keyboard and mouse if desired.

WheretoFindUserInformation

CAUTION. Be sure to read all safety information, warnings, and cautions in the

manuals that relate to the information you use there.

user

Some topics of interest when servicing the product are listed in the following

le. The manuals are available at www.tektronix.com/manuals.

tab

Location of user topics

Manual Topic

DSA8300 Quick Start User Manual, Tektronix part number 071-2897-00

Your sample-module user manual. (Module manual part numbers are provided in the preface o f this manual.)

Environmental requirements (site considerations, operating requirements,

ckmount requirements)

aximum conﬁguration

onnecting peripherals such as monitor,

C printer, keyboard, and mouse

Powering the instrument on and off

System hard drive rebuild

Diagram of rear-panel connectors

Installing sampling modules

Installing probes and other accessories to the sampling modules

DSA8300 Digital Serial Analyzer and Modules Service Manual 1–1

Operating Information

Location of user topics

Manual Topic

DSA8300 Speci Veriﬁcation manual, Tektronix part number

077-0571-00

Product software install instructions, Tektronix p with the product software disc.

ﬁcations and Performance

art number 071-2050-02. Shipped

System diagno

System hard drive rebuild procedure

Software r elease notes

Software installation

Operating system reinstallation

stics procedure

1–2 DSA8300 Digital Serial Analyzer and Modules Service Manual

Theory of Operation

This chapter describes the electrical operation of the instrument and sampling modules.

The instrument contains many digital logic circuits. This manual refers to these circuits with standard logic s ymbols and terms. Unless otherwise stated, all logic functions a the two logic levels is the high (1) state, and the more negative level is the low (0) state. Signal states may also be described as "true", meaning their active state, or "false", meaning their nonactive state. The speciﬁc voltages that constitute a high or low state vary among the electronic devices.

The instrument control system is a dual Wintel/PowerPC based processor board. The platform features XGA resolution ﬂat-panel display, transparent touch screen and user front-panel with direct access to commonly used oscilloscope functions. The inst advanced functions.

re described using the positive-logic convention: the more positive of

rument is also equipped with a mous e and keyboard for access to more

DSA8300 Digital Serial Analyzer and Modules Service Manual 2–1

Theory of Operation

Mainframe Ove

rview

This mainframe overview describes the basic operation o f each functional circuit block as shown in the following ﬁgure:

Figure 2-1: DSA8300 block diagram

2–2 DSA8300 Digital Serial Analyzer and Modules Service Manual

Theory of Operation

Input Signal Path

Asignalenters connector on a sampling module, or a real time probe connected to the sampling module channel.

Acquisition system. The acquisition system conditions the input signals, samples them, converts them to digital signals, and controls the acquisition process under direction of the processor system.

The acquisition system includes the multi-source trigger, acquisition time base, and acquisition mode generation and control circuitry. The acquisition boards are located in the bottom compartment of the instrument and can accommodate four small slot sampling plug-ins, two large slot plug-ins and a trigger/holdoff subsystem. Up to eight vertical channels are accommodated simultaneously. Channels 1, 2, 3, and 4 can be either large or small slots. The presence of an assembly in one or both large slots displaces the small slot functionality in the corresponding small slots. The external trigger and all small slot channels feature a Tekprobe Level 2 probe power connector for a dditional front end signal conditioning functions like high input-impedance real-time probes, if equipped on the sampling module.

Processor system. The processor system contains a dual Wintel/PowerPC

The basic instrument conﬁguration supports up to eight channels labeled Ch 1 through Ch 8, provides two external trigger inputs for direct and prescaled/clock triggering through built-in prescaler and is able to support four optional internal trigger sources associated with the large slot channels.

the instrument through a direct coaxial connection to the input

Display Panel

Front Panel

Color LCD display Active-matrix touch panel.

Display system. The display system sends the text and waveform information to the display panel

Touch panel. The touch panel sends information to the processor. Any changes in their settings are reported to the processor system.

The front panel board reads the front-panel switches and knob sensors. Any changes in their settings are reported to the Windows system. The front panel board also turns the LEDs on. One USB port is also accessible from the front panel.

Front-panel menu switches are also read by the front-panel microcontroller. The microcontroller sends any changes in menu selections to the Windows system. The ON/STBY switch is one of the menu switches. However, it is not read by the front panel board, but passes through the front panel board to the Wintel motherboard.

The CD-RW/DVD drive enables you to load software to customize your instrument for your measurement needs and to save data to a writable CD.

DSA8300 Digital Serial Analyzer and Modules Service Manual 2–3

Theory of Operation

Rear Panel

Low Voltage Power Supply

Fans

The removable h

ard drive contains the product software and operating system software. It also provides capability to store and access waveform data. The GPIB allows for external control of the instrument.

You can make hard copies on the GPIB and RS-232 ports. Other ports are outputs from the ATX board: DVI-I, USB (4), sound, serial, Ethernet, mouse, and keyboard.

The low voltage power supply is a switching power converter with active power factor control. It supplies power to all of the circuitry in the instrument.

The principal POWER switch, located on the rear panel, controls all power to the instrument including the Low Voltage Power Supply. The ON/STBY switch, located on the front panel, also controls all of the power to the instrument except for part of the circuitry in the Low Voltage Power Supply and stand-by power on the motherboard.

The power supply sends a power fail (~PF) warning to the proces sor system if the power is going down.

The fan assembly provides forced air cooling for the instrument.

The fans are controlled by the PPC processor.

Electrical Sampling Modules

80E01, 80E02, 80E03,

80E06, 80E07, and 80E09

Sampling Modules

The electrical sampling m odules (non-TDR capable) are one- and two-channel sampling modules. Their basic features are listed in the following table. (The TDR capable sampling modules are describe later.)

Electrical sampling module features

ature

Number

o independent channels

Bandwidth

Selectable bandwidths

Signal connectors

Remote sampler

E01

122122

50 GHz 12.5 GHz 20 GHz 70 GHz 30 GHz 60 GHz

N.A. N.A. N.A. N.A.

2.4 mm female

N.A. N.A. N.A. N.A. 2 meter

E02

3.5 mm female

E03

3.5 mm female

E06

1.85 mm (V) female

E07

20 GHz, 30 GHz

2.92 mm (K) female

cable

E09

40 GHz, 30 GHz, 60 GHz

1.85 mm (V) female

2 meter cable

2–4 DSA8300 Digital Serial Analyzer and Modules Service Manual

Theory of Operation

80E04, 80E08, and 80E10

TDR/Sampling Modules

For the two-cha

nnel modules, a single strobe delivered from the instrument mainframe to both acquisition channels controls the timing of the strobe assertion to both channels. If channel-to-channel deskew is zero and the channel delays (if equipped) are matched, the sampling coincidence between channels is very close. Acquisition deskew function is carried out either by making separate acquisitions over individual acquisition windows or by adjusting Channel Delay (if equipped).

For the one-channel modules, an individual strobe delivered from the instrument mainframe to the acquisition channel controls the timing of the strobe assertion to the chan

nel. Acquisition deskew function is carried out by moving the strobe timing for the channel to a unique acquisition window or by adjusting Channel Delay (if equipped).

Most electrical channels feature a Tekprobe Level 2 probe power connector for attachment of a real time probe. The control of this probe is a mainframe function.

All module calibration signals are derived from a 2.5 V precision voltage reference internal to the sampling module. Settings derived from this reference are stored in a nonvolatile EEPROM in the sampling module, although the responsibility for the execution of these settings is with the mainframe.

The TDR/Sampling modules are low noise samplers, with each channel capable of generating its own Time Domain Reﬂectometry (TDR) step. The basic features of these modules are listed in the following table.

TDR sampling module features

ture

Fea

ber of

Num independent channels

Number of TDR

annels

Bandwidth

Selectable bandwidths

Signal connectors 3.5 mm female 2.92 mm (K) female 1.85 mm (V) female

Remote sampler N.A. 2 meter cable 2 meter cable

80E

222

0GHz

N.A.

80E

0GHz

20 GHz, 30 G Hz 40 GHz, 30 GHz,

80E

0GHz

50 GHz

For these modules, a single strobe d elivered from the instrument mainframe to both acquisition channels controls the timing of the strobe assertion to both channels. If channel-to-channel deskew is zero and the channel delays (if equipped) are matched, the sampling coincidence between channels is very close. Acquisition deskew function is carried out by making separate acquisitions over acquisition windows or by adjusting Channel Delay (if equipped).

Each electrical channel features a Tekprobe Level 2 probe power connector for attachment of a real time probe. The control of this probe is a mainframe function.

DSA8300 Digital Serial Analyzer and Modules Service Manual 2–5

Theory of Operation

All module cali internal to the sampling module. Settings derived from this reference are stored in a nonvolatile EEPROM in the sampling module, although the responsibility for the execution of these settings is with the mainframe.

When used in the acquisition mode (that is, with the TDR step generator turned off) each channel functions as a normal sampling input. In the TDR mode, a fast rise time step is generated internally for each channel and applied to the input signal path for that channel. The acquisition part of the TDR/sampling module remains functional for monitoring the primary step and its reﬂected components. The sampling module provides two self-contained TDR channels. The polarity of the output step can be selected independently for each channel. This allows differential or common mode testing of two coupled lines as well as independent testing of isolated lines.

Optical Sampling Modules

80CXX and 80CXX-CR optical modules share the same mechanical package and are built with a common circuit board. D ifferent functionality within the m odules (current and future modules) is achieved by installing different O/E modules, ﬁlters and clock recovery boards along with setting the sampler bandwidth as demanded. The key features supported in the module are:

bration signals are derived from a 2.5 V precision voltage reference

A one channel, low noise, adjustable bandwidth sampler allowing multiple bandwidth settings for optimizing noise versus bandwidth demands.

An ampliﬁed or nonampliﬁed O/E converter.

Support for internal RF switches in the signal path with a straight-through path and three hardware-ﬁltered reference receiver paths between the O/E converter and the sampler.

An average optical power meter.

Integral clock recovery option with internal coaxial connection to the mainframe trigge

Communication with the mainframe for identiﬁcation, control and calibration/compensation storage.

The "system response" depends on all of the c omponents in the signal path from the front panel to the sampler. Bandwidth and reference receiver responses are calibrated at the factory with a sub-picosecond optical impulse applied to the front panel connector or with an optical heterodyne system. This ensures that all components are included, but also means that components cannot be replaced without performing calibration.

Compensation performs a DC transfer curve characterization for each bandwidth/reference receiver setting. The curve data is stored in the module EEPROM and used to generate a look-up table in the mainframe. This data corrects for linearity, gain and offset errors in the sampler.

r, front panel clock and data output (not all have data).

2–6 DSA8300 Digital Serial Analyzer and Modules Service Manual

Theory of Operation

Reference rece

ivers can be created in any of the following ways:

Ahardwareﬁlter inserted between the O/E and the sampler and dominates the res ponse.

No ﬁlter is used, but the bandwidth of the sampler is adjusted.

The O/E bandwidth is adjusted and dominates the response.

Information about the available bandwidth and reference receiver selections, and the method used to set the bandwidth for the optical modules is in the Optical Sampling Module section. (See page 2-8.)

The power monitor is a second measure of the photo-diode current that is independent of the sampler signal path. Analog circuitry continuously senses the current ﬂowing into the bias side of the photo diode. The signal is ampliﬁed by a programmable gain ampliﬁer and input to an 8-bit AD converter. The AD

converter and ampliﬁer are controlled through the I

C interface. Compensation performs two functions in the power meter: First, two offset inputs are adjusted in the ampliﬁer so that the signal stays in range for all of the gain settings. Next, offset is measured for all gain s ettings and stored so it can be subtracted from the raw measured current. Because the m easurements are made through independent paths the power monitor is useful in debugging module/mainframe problems.

The main board of the module only provides power and control bits to the clock recovery board. A small fraction of the input signal is split off and applied to the clock recovery components. The type of splitter for each module is shown in the foll

owing table.

Module optical/electrical split

Module Optical Split Electrical Split

C01

C02

C03

C04

C07

C07B

C08

C08B

C08C

C09

C11

C12

The recovered clock is routed in coaxial cable through the rear connector of the module to the Optical Front End board in the mainframe. The Optical Front End board has a switch that selects which modules clock is applied to the trigger. The control signal for that switch comes from the optical module.

DSA8300 Digital Serial Analyzer and Modules Service Manual 2–7

Theory of Operation

80C01 Optical Sampling

Module

The 80C01 modul (1100-1650 nm) signals at 622, 2488, and 9953 Mb/s a s well as general purpose testing up to 20 GHz optical bandwidth. Bandwidth and reference receiver calibration is performed with a sub-picosecond optical impulse and a Fourier transform method.

OC12: The electrical sampler is adjusted to approximately 7.5 GHz (-3 dB) bandwidth and signal is routed through a hardware ﬁlter designed to result in the combined system having an OC12 (STM-4) Reference Receiver response.

OC48: The electrical sampler is adjusted to 7.5 GHz (-3 dB) bandwidth and signal is routed through a hardware ﬁlter designed to result in the combined system having an OC48 (STM-16) Reference Receiver response. These adjustmentsmustbemadeatthefactory.

OC192: The electric al sampler is adjusted to give the desired response, and s ignal is not routed through any ﬁlter (signal is sent through the straight-through path). The sampler bandwidth and response is optimized during the calibration such that the combined system will have an OC192 (STM-64) Reference Receiver response.

12.5 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >12.5 GHz.

20 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >20 GHz.

e supports conformance testing of long wavelength

80C02 Optical Sampling

Module

The 80C02 module is optimized for testing of long-wavelength (1100-1650 nm) signals at (9.953 Gb/s) SONET OC-192 / SDH STM-64 standards. With its high optical bandwidth (>30 GHz) it is also well suited to general purpose high-performance optical component testing.

12.5 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >12.5 GHz.

20 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >20 GHz.

30 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >30 GHz.

2–8 DSA8300 Digital Serial Analyzer and Modules Service Manual

Theory of Operation

80C03 Optical Sampling

Module

The 80C03 modul (700-1650 nm) signals at 1.063, 1.250, and 2.488 Mb/s as well as general purpose testing with >2.3 GHz optical bandwidth. Its ampliﬁed optical to electrical converter design enables the user to examine very low-level optic al signals.

OC48: The electrical sampler is adjusted to approximately 12.5 GHz (-3 dB) bandwidth and signal is not routed through any ﬁlter (signal is sent through the straight-through path). The O/E converter is designed by the vendor to match the OC48 reference receiver response curve. The span adjustment provides l factory so that the combined system will have an OC48 (STM-64) Reference Receiver response. This mode is synonymous with the 2.3 GHz maximum bandwidth setting.

FC1063: The electrical sampler is adjusted and O/E converter span volta ge are the same values as in the OC48 mode. The signal is routed through a hardware ﬁlter designed to result in the combined system having an FC1063 (1.0625 Gb/s Fibre Channel) Reference Receiver response.

GBE: The electrical sampler is adjusted and O/E converter span voltage are the same values as in the OC48 mode. The signal is routed through a hardware

designed to result in the combined system having an GBE (1.25 Gb/s

ﬁlter Gigabit Ethernet) Reference Receiver response.

0C03 module can be conﬁgured with clock recovery that supports Fibre

The 8 Channel 1063 (1.063 Gb/s) and OC-48 / STM-16 (2.488 Gb/s) standards.

e supports conformance testing of both short and long bandwidth

imited adjustment of the frequency response. It is adjusted at the

80C04 Optical Sampling

ule

Mod

The 80C04 module is optimized for testing of long wavelength (1100-1650 nm)

nals at either 9.953 Gb/s or 10.664 Gb/s. With its high optical bandwidth

sig >28 GHz, it is also well suited to general-purpose, high-performance optical component testing.

OC192 or 10.664 Gb/s: The electrical sampler is adjusted to give the desired response, and signal is not routed through any ﬁlter (signal is sent through the straight-through path). The sampler bandwidth and response is optimized during the calibration such that the combined system will have an OC192 (STM-64) or 10.66 Gb Reference Receiver response.

20 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >20 GHz.

30 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >28 GHz.

The 80C04 can be optionally conﬁgured with clock recovery (Opt. CR-1) that supports 9.953 Gb/s telecom standards.

DSA8300 Digital Serial Analyzer and Modules Service Manual 2–9

Theory of Operation

80C05 Optical Sampling

Module

80C06 Optical Sampling

Module

80C07 Optical Sampling

Module

The 80C05 modul Thismoduleisintendedtobeusedasatestandmeasurementtoolforhigh bandwidth telecommunications with its high optical bandwidth >40 GHz.

OC192: There is one Reference Receiver setup selectable for 9.95328 Gb/s SONET/SDH standard.

There is no clock recovery option available.

The 80C06 module is designed to test long wavelength (1520-1580 nm) signals. Thismoduleisintendedtobeusedasatestandmeasurementtoolforhigh bandwidth telecommunications with its high optical bandwidth >55 GHz.

55 GHz: There is only a single bandwidth selection available, no Reference Receiver setups selectable.

There is no clock recovery option available.

The 80C07 module is designed to test both long and short wavelength (700-1650 nm) signals. This module is intended to be used as a test and measurement tool for high bandwidth telecommunications with its high optical bandwidth >2.3 GHz.

e is designed to test long wavelength (1520-1580 nm) signals.

80C07B Optical Sampling

Module

80C08 Optical Sampling

Module

Filtered rates are OC-3, OC-12; unﬁltered rate is OC-48.

There is clock recovery option available (155/622/2488 Multi-rate).

The 80C07B module is designed to test both long and short wavelength (700-1650 nm) signals. This module is intended to be used as a test and measurement tool for high bandwidth telecommunications with its high optical bandwidth >2.3 GHz.

Supported standards or data ﬁltering rates include OC-3, OC-12, OC-48, ENET2500/2GBE, GBE, FC1063, FC2125, and Inﬁniband.

Clock recovery options are available (155/622/1063/1250/2125/2488/2500/2666).

The 80C08 module is designed to test both long and short wavelength (700-1650 nm) signals. This module is intended to be used as a test and measurement tool for high bandwidth telecommunications with its high optical bandwidth >9.0 GHz.

10.0 GHz: No ﬁlter is used and the sampler bandwidth is adjusted; the O/E bandwidth is adjusted and dominates the response (9.953/10.3125 Gb/s Multi-rate).

There is clock recovery option available (9.953/10.3125 Gb/s Multi-rate).

2–10 DSA8300 Digital Serial Analyzer and Modules Service Manual

Theory of Operation

80C08B Optical Sampling

Module

80C08C Optical Sampling

Module

The 80C08B modu (700-1650 nm) signals. This module is intended to be used as a test and measurement tool for high bandwidth telecommunications with its high optical bandwidth >9.5 GHz.

10.0 GHz: No ﬁlter is used and the sampler bandwidth is adjusted; the O/E bandwidth is adjusted and dominates the response (9.953/10.3125 Gb/s Multi-rate).

Clock recovery options are available (9.953/10.3125/10.51875 Gb/s Multi-rate).

The 80C08C module is designed to test both long and short wavelength (700-1650 nm) signals. This module is intended to be used as a test and measurement tool for high bandwidth telecommunications with its high optical bandwidth >10 GHz.

10.0 GHz: No ﬁlter is used and the sampler bandwidth is adjusted; the O/E bandwidth is adjusted and dominates the response

/10.3125/10.518/10.66/10.709/11.1/11.317 Gb/s).

(9.953

Clock recovery options are available (9.953/10.3125/10.518 Gb/s and

nuous-rate from 9.8 Gb/s to 12.6 Gb/s).

Conti

le is designed to test both long and short wavelength

80C09 Optical Sampling

Module

80C10 Optical Sampling

Module

The 80C09 module is d esigned to test long wavelength (1100-1650 nm) signals. This module is intended to be used as a test and measurement tool for high

dwidth telecommunications with its high optical bandwidth >30 GHz.

ban

Supported standards or data ﬁltering rates include OC-192 and FEC10.709.

Clock recovery options are available (OC-192 and FEC10.709).

The 80C10 module is designed to test long wavelength (1310 and 1550 nm) signals. This module is intended to be used as a test and measurement tool for high bandwidth telecommunications with its high optical bandwidth >65 GHz.

Supported standards or data ﬁltering rates include OC-768 and FEC43.02 (G.709).

30 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >30 GHz.

65 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >65 GHz.

There is no clock recovery option available.

DSA8300 Digital Serial Analyzer and Modules Service Manual 2–11

Theory of Operation

80C10B Optical Sampling

Module

80C11 Optical Sampling

Module

The 80C10B modu signals. This module is intended to be used as a test and measurement tool for high bandwidth telecommunications with its high optical bandwidth >80 GHz.

Supported standards or data ﬁltering rates include OC-768 and FEC43.02 (G.709).

30 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >30 GHz.

65 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >65 GHz.

80 GHz: The sampler bandwidth and response is set during the calibration such that the combined system will have an Optical Bandwidth (-6 dB) >80 GHz.

There is no clock recovery option available.

The 80C11 module is designed to test long wavelength (1100-1650 nm) signals. Thismoduleisintendedtobeusedasatestandmeasurementtoolforhigh bandwidth telecommunications with its high optical bandwidth >20 GHz.

le is designed to test long wavelength (1310 and 1550 nm)

80C12 Optical Sampling

Module

Supported standards or data ﬁltering rates include

9.953/10.31/10.518/10.66/10.71/11.1 Gb/s.

Clock recovery options are available (9.953/10.66/10.71 Gb/s and Continuous-rate from 9.8 Gb/s to 12.6 Gb/s).

The 80C12 module is designed to test both long and short wavelength (700-1650 nm) signals. This module is intended to be used as a test and measurement tool for high bandwidth telecommunications with its high optical bandwidth >10 GHz.

There are three Reference Receiver ﬁlters selectable that are customer speciﬁed from the following list of ﬁve rates: 1FC (FC1063) for 1.0625 Gb/s Fibre Channel, 2FC (FC2125) for 2.125 Gb/s Fibre Channel, 10GBase-X4 for 3.125 Gb/s, VSR-5 for 3.31776 Gb/s, and 4FC (FC4250) for 4.25 Gb/s Fibre Channel. Filterless, full-bandwidth settings (8.5 GHz and 9 GHz) are also ava ilable.

In addition, this module offers the option to support 10 Gb/s optical standards as well. This option is mutually exclusive with the sub-10 Gb/s ﬁlter options. The standard reference receiver ﬁlter rates offered with the Option 10G are SONET/SDH OC-192/STM-64, 10GBase-W, 10 Gb Ethernet (9.95338 Gb/s), 10GBase-R (10.3125 Gb/s), 10G Fibre Channel (10.51875 Gb/s), G.975 FEC (10.66 Gb/s), G.709 FEC (10.71 Gb/s), 10GBE FEC (11.0957 Gb/s),

2–12 DSA8300 Digital Serial Analyzer and Modules Service Manual

Theory of Operation

80C14 Optical Sampling

Module

80C25GBE Optical

Sampling Module

8G FibreChanne ﬁlter settings require no hardware ﬁlters.

An electrical the Tektronix 80A05 or 80A07 for clock recovery.

The 80C14 Series Optical Sampling Module is a high-performance optical module that suppor Fibre Channel and 14.063 Gb/s Inﬁniband.

The 80C14 s (8.500 Gb/s), OC-192/STM-64 (9.953 Gb/s), 10GBase-W (9.953 Gb/s), 10GBase-R (10.31 Gb/s), 40GBase-R4 (10.31 Gb/s), 100GBase-SR10 (10.31 Gb/s), 10GFC (10.52 Gb/s), ITU-T G.975 FEC (10.664 Gb/s), ITU-T G.709 (10.709 Gb/s), 10 GbE FEC (11.1 Gb/s), 10GFC FEC (11.3 Gb/s), Super FEC (12.5 Gb/s), 16GFC (14.025 Gb/s), 14G Inﬁniband FDR (14.062

Clock recovery is supported with the use of the CR175A or CR286A Clock Recove

The 80C25GBE module is designed to test long wavelength (1310 and 1550 nm) signals. This module is intended to be used as a test and measurement tool for high

ts high bandwidth telecom and datacom standards, including 16 GFC

5Gb/s).

ry instrument (purchased separately).

bandwidth telecommunications with its high optical bandwidth >65 GHz.

l (8.5 Gb/s), 10G FibreChannel FEC (11.317 Gb/s). These

clock recovery output signal is provided that can be routed to

upports the following standards and data ﬁltering rates: 8GFC

Supported standards or data ﬁltering rates include 25.781 Gb/s 100GBase-xR4

27.739 Gb/s 100GBase-xR4 FEC.

and

65 GHz: The sampler bandwidth and response is set during the calibration

ch that the combined system will have an Optical Bandwidth (-6 dB)

su >65 GHz.

ere is no clock recovery option available.

80A01 Trigger Prescale Preampliﬁer Module

The 80A01 module is designed to increase the sensitivity of the prescale trigger input of the DSA8300 to ≤200 mV

The major function block of the module is a high sensitivity, high gain RF ampliﬁer. The input and output to this a mpliﬁer are routed to two identical SMA, female connectors, labeled Input and Output at the module front panel.

The module receives power from the main instrument through a single connector at the rear of the module. The power LED indicates the module is receiving power through the interface connector.

p-p

DSA8300 Digital Serial Analyzer and Modules Service Manual 2–13

Theory of Operation

80A02 EOS/ESD

Protection Module

The 80A02 EOS/ESD (Electrical Over Stress/Electro-Static Discharge) protection module works with any DSA8300 instrument and provides static electricity damage prote elements.

The 80A02 EO to provide static protection to a sensitive single input channel of a sampling oscilloscope with very minimal speed degradation.

The 80A02 EOS/ESD module is designed to work with either the Tektronix P8018 probe for manual test station static protection as well as automated test stations.

ction to vulnerable sampling head input stages and/or other sensitive

S/ESD module has a 26 GHz bandwidth, making it possible

80A05 Electrical Clock Recovery M odule

The electrical clock recovery module is capable of performing clock recovery on the input signal (signal input must meet data rate and format requirements), and provides this signal as a trigger source to the DSA8300.

Front panel connectors provide a replica of the recovered clock signal.

Themoduleusesoneoftwoseparateclock recovery circuits dependant on the speciﬁed data rate. The single-ended or complementary input signals are split with a 1:2 divider and routed to the two circuits.

The low bandwidth circuit recovers clock and data from input data in the 50 Mb/s to 2.7 Gb/s range. The recovered clock from this circuit is routed directly to the front panel and internal trigger.

The high bandwidth circuit recovers clock a nd data from input data in the 2.7 Gb/s to 12.6 Gb/s range. The recovered clock to the front panel and internal trigger

gnals are always clock/16.

With option 10G, the 10G recovered clock is also routed to the front panel.

There is one front panel indicator LED - Clock Recovery Enable. It indicates the clock recovery circuitry is on and programmed to the requested bit rate.

2–14 DSA8300 Digital Serial Analyzer and Modules Service Manual

Theory of Operation

82A04 Phase Re

ference Module

The 82A04 Phase Reference Module is designed to decrease horizontal position uncertainty with data signals, when a r eference clock signal synchronized to the data signal, both channels in that slot.

The Phase Co unit circle location information for the phase of the data sample, and triggered, where the module, in conjunction with the trigger signal, provides both base positioning, and reﬁned positioning, for the data sample.

The input is precision 1.85 mm. Phase correction works over the range of 2.5 GHz

- 25 GHz (82A04), or 2.5 GHz - 60 GHz (82A04-60G). The LED indicates the module is being utilized for phase correction.

is available. It consumes a small slot, and displaces operation of

rrection modes available are free run, where the module provides

DSA8300 Digital Serial Analyzer and Modules Service Manual 2–15

Theory of Operation

2–16 DSA8300 Digital Serial Analyzer and Modules Service Manual

Adjustment Procedures

This section contains an adjustment procedure for your instrument. The purpose of this procedure is to return the instrument conformance to its speciﬁcations.

Adjustment interval. The voltage and timing references inside the instrument are very sta time you should perform the Adjustment Procedures is if the instrument fails any of the mainframe performance veriﬁcation checks provided in the DSA8300 Speciﬁcations and Performance Veriﬁcation manual.

Adjustment environment. The instrument must be adjusted in a 20°C to 30 °C ambient t up at least 20 minutes in this environment b efore you begin the adjustment procedure.

Required Equipment

The adjustment procedure requires the speciﬁc test equipment and materials listed in the following table.

ble over time and should not need routine adjustment. The only

emperature environment. The instrument and signal source must warm

Category Speciﬁc equipment required Quantity

Signal source Signal generator 50 MHz to 1 GHz,≤ 1 ppm frequency accuracy

Frequency counter Frequency resolution 12 digits 1 ea

Meter Digital Multimeter, with 6.5 plus digits 1 ea

Instrument controller (only one of these conﬁgurations required)

Divider

Adapter

Coaxial cables 50Ω, male-to-male SMA connectors

GPIB cables GPIB cable, 1 m min length, Tektronix part number 002-0991-01

Depending on other USB devices attached to the instrument, a USB hub may also be required. Consult your National

Instruments documentation for more information.

PC-compatible computer with National Instruments GPIB Controller card and software, running Windows 95/98 or NT

National Instruments USB GPIB Controller card for Windows 98 and National Instruments NI-488.2 for Windows software (to install in the instrument)

Power, 50Ω, SMA "T" male Tektronix 015-0565-00

SMA "T", male to 2 SMA female Tektronix part number 015-1016-00

SMA male to BNC female, Tektronix part number 015-0554-00

BNC to dual banana plug, Tektronix part number 103-0095-00

1ea

3ea

1ea

DSA8300 Digital Serial Analyzer and Modules Service Manual 3–1

Adjustment Procedures

Equipment Hookup

1. Connect the equipment as shown in the following ﬁgure:

2. Set the National Instruments GPIB Interface command software to allow

GPIB communications between the PC controller and DSA8300, device under test (DUT).

3. Allow the test equipment and DUT to warm up for at least 20 minutes before starting the adjustment procedures.

Main Instrument Adjustments

DC Calibrator Adjust

1. Use the equipment connection shown in the preceding ﬁgure. Make sure that the equipment has warmed up for at least 20 minutes.

2. Run the compensation routine.

3. Verify communication between the controller and DUT by entering the

following GPIB command:

The instrument should respond with Tektronix and Firmware Version.

4. Turn off the instrument cal constant protection by entering the following GPIB command:

5. Set the instrument DC calibrator offset cal constant to 0 by entering the following GPIB command:

6. Wait 8 seconds, and then set the instrument DC calibrator Lsb cal constan to 1.0 by entering the following GPIB command:

"DcCalLsbAdj",1.0

*IDN

SYST:PROT OFF

CALCOMP:DOUBLE "DcCalOffsetAdj",0.0

CALCOMP:DOUBLE

7. Wait 8 seconds, and then set the instrument DC calibrator output to 0 Volts by entering the following GPIB command:

8. Record the DMM reading.

3–2 DSA8300 Digital Serial Analyzer and Modules Service Manual

CALIBRATE:DCCALIBRATOR 0.0

Adjustment Procedures

9. Set the instrum reading by entering the following GPIB command:

"DcCalOffsetAdj",(-1.0 * the DMM reading)

ent DC calibrator o ffset cal constant to -1 * DMM

CALCOMP:DOUBLE

Example: CALCOMP:DOUBLE "DcCalOffsetAdj", 3.2e-4

10. Set the inst command:

11. Record the D

rument calibrator to 1.0 V by entering the following GPIB

CALIBRATE:DCCALIBRATOR 1.0

MM reading (reading1).

12. Set the instrument calibrator to -1.0 V by entering the following GPIB

ALIBRATE:DCCALIBRATOR -1.0

command:

13. Record the DMM reading (reading2).

14. Calculate the cal constant using the following equation: (–1.0 * Reading2

+ Reading1) ÷ 2.

15. Set the instrument calibrator Lsb cal constant by entering the following GPIB command:

calcul

ated in previous step)

CALCOMP:DOUBLE "DcCalLsbAdj", (cal constant

16. Wait 8 seconds, and then save the DC adjustments by entering the following GPIB c

ommand:

CAL:SAVE:FACT:MAIN

17. Update the mainframe calibration time/date/temperature stamp by entering

ollowing GPIB command:

the f

CAL:UPDATEINFO:MAIN

DC Calibrator Adjust

Veriﬁcation

18. Turn on the instrument cal constant protection by entering the following com

mand:

SYST:PROT ON

To verify that the DC calibration adjustment was successful, complete the

lowing:

fol

1. Set the instrument DC calibrator to -1.0 V by entering the following GPIB

mmand:

CALIBRATE:DCCALIBRATOR -1.0

2. Verify that the DMM reads -1.0 V ±1 mV

3. Set the instrument DC calibrator to 1.0 V by entering the following GPIB

command:

CALIBRATE:DCCALIBRATOR 1.0

4. Verify that the DMM reads 1.0 V ±1 mV

5. Set the instrument DC calibrator to 0.0 V by entering the following GPIB

command:

CALIBRATE:DCCALIBRATOR 0.0

6. Verify that the DMM reads 0.0 V ±0.1 mV

DSA8300 Digital Serial Analyzer and Modules Service Manual 3–3

Adjustment Procedures

Internal 10 MHz Adju st

Connect the DSA

8300 to a signal generator and frequency counter as shown

in the following ﬁgure:

1. Set the signal generator as follows

Frequency to 1 GHz

Amplitude to 1.0 V peak to peak

Output to on

2. Set the frequency counter as follows:

Frequency to 200 kHz

Number of digit

sto9

3. Set the DSA8300 as follows:

Trigger source to TDR

Clock rate to 200 kHz

TDR Trigger mode to External (select Advance Trigger mode, and then

select External Trigger for TDR mode)

4. Enter the following GPIB command to turn the instrument cal constant protection off:

“SYST:PROT OFF”

5. Set the calibration value to the default by entering the following GPIB command:

“CALCOMP:DOUBLE "Internal10MHzRefFreq",

10e6

6. Measure the TDR Clock Out frequency (Reading 1).

7. Set the DSA8300 trigger mode to Internal.

8. Measure the TDR Clock Out frequency (Reading 2).

9. Enter the following GPIB command:

“Internal10MHzRefFreq”,

(Reading2/Reading1 * 10M)

“CALComp:DOUBLE

3–4 DSA8300 Digital Serial Analyzer and Modules Service Manual

Adjustment Procedures

10. Measure the TDR

Clock Out frequency. (Recheck)

11. Verify that the 10 MHz measurement is within 2 kHz.

12. Save the mainframe factory calibration constants by entering the following

GPIB command:

“CAL:SAV:FACTORY:MAIN”

13. Update the mainframe calibration time/date/temperature stamp by entering the following GPIB command:

“CAL”UPDATEINFO:MAIN”

14. Enter the following GPIB command to turn the instrument cal constant protection on:

SYST:PROT ON

End of Procedure

DSA8300 Digital Serial Analyzer and Modules Service Manual 3–5

Adjustment Procedures

3–6 DSA8300 Digital Serial Analyzer and Modules Service Manual

Maintenance

This section contains the information needed to do periodic and corrective maintenance on the mainframe, electrical modules, and optical modules, as well as repackaging instructions for returning the products to Tektronix for service.

Preventing

ESD

Before servicing this product, read the General Safety Summary and Service Safety Summary at the front of the manual, and familiarize yourself with the

following

CAUTION. Electrostatic discharge can damage any semiconductor component

in this instrument.

When performing any service that requires internal access to the instrument, adhere to the fol their components due to electrostatic discharge:

1. Minimize handl

2. Transport and store static-sensitive assemblies in their static protected

3. Discharge th

4. Do not place anything capable of generating or holding a static charge on the

electrostatic discharge (ESD) information.

lowing precautions to avoid damaging internal assemblies and

ing of static-sensitive circuit boards and components.

containers or boards.

wrist strap while handling these assemblies. Service static-sensitive assemblies only at a static-free w ork station.

work station surface.

on a metal rail. Label any package that contains static-sensitive

e static voltage from your body by wearing a grounded antistatic

5. Handle circuit boards by the edges when possible.

6. Do not sli

7. Avoid handling circuit boards in areas that have a ﬂoor or work-surface

coverin

de the circuit boards over any surface.

g capable of generating a static charge.

Inspection and Cleaning

tion and cleaning are done as preventive maintenance. Preventive

Inspec maintenance, when done regularly, may prevent instrument malfunction and enhance its reliability.

Preventive maintenance consists of visually inspecting and cleaning the instrument and using general care when operating it.

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–1

Maintenance

General Care

Flat Panel Display Cleaning

How often to do m the instrument is used. A proper time to perform preventive maintenance is just before instrument adjustment.

The cabinet h place when operating the instrument.

WARNING. To avoid personal injury due to electric shock, power off the instrument

and disconnect it from line voltage before performing any procedure that follows.

The mainframe display is a soft plastic display and must be treated with care during cleaning.

CAUTION. Improper cleaning agents or methods can damage the ﬂat panel

display.

To avoi to clean the display surface.

Do not s

Do not scrub the display with excessive force.

d damage, do not use abrasive cleaners or commercial glass cleaners

pray liquids directly on the display surface.

aintenance depends on the severity of the environment in which

elps keep dust out of the instrument and should normally be in

Exterior Cleaning

Clean the ﬂat-panel display surface by gently rubbing the display with a clean-room wipe (such as WypAll Medium Duty Wipes, #05701, available from

erly-Clark Corporation).

Kimb

If the display is very dirty, moisten the wipe with distilled water or a 75%

propyl alcohol solution and gently rub the display surface. Avoid using excess

iso force or you may damage the plastic display surface.

CAUTION. To prevent getting moisture inside the instrument during external

cleaning, use only enough liquid to dampen the cloth or applicator.

Do not use chemical cleaning agents that might damage the plastics used in

his instrument. Use only deionized water when cleaning the menu buttons or

t front-panel buttons. Use a 75% isopropyl alcohol solution as a cleaner and rinse with deionized water. Before using any other type of cleaner, consult your Tektronix Service Center or representative.

4–2 DSA8300 Digital Serial Analyzer and Modules Service Manual

Maintenance

Exterior Inspection

Clean the exter

ior surfaces of the chassis with a dry lint-free cloth or a soft-bristle brush. If any dirt remains, use a cloth or swab dipped in a 75% isopropyl alcohol solution. Use a swab to clean narrow spaces around controls and c onnectors. Do not use abrasive compounds on any part of the chassis that might damage the chassis.

Clean the On/Standby switch using a dampened cleaning towel. Do not spray or wet the switch directly.

Use the following table to inspect the outside of the instrument for damage or missing parts. Immediately repair defects that could cause personal injury or lead to further damage to the instrument.

External inspection checklist

Item Inspect for Repair action

Cabinet, front panel, and cover

Front-panel knobs Missing, damaged, or loose

Connectors

80C0X male ﬁber connections

Carrying handle and cabinet feet

Accessories

Cracks, scratches, deformations, damaged hardware.

knobs.

Broken shells, cracked insulation, and deformed contacts. Dirt in connectors.

Lint or dust on all male ﬁber connections.

Correct operation. Repair or replace defective

Missing items or parts of items, bent pins, broken or frayed cables, and damaged connectors.

Repair or replace defective assembly.

Repair or replace missing or defective knobs.

Repair or replace defective assemblies. Clear or wash out dirt.

Clean all male ﬁber connections with a lint-free cleaning cloth.

assembly.

Repair or replace damaged or missing items, frayed cables, and defective assemblies.

Interior Inspection

To access the inside of the instrument for inspection and cleaning, refer to the removal and installation procedures. (See page 4-5, Removal and Installation.)

Inspect the internal portions of the instrument for damage and wear, as shown in the following table. Repair defects immediately.

CAUTION. To prevent damage from electrical arcing, make sure that the circuit

boards and components are dry before applying power to the instrument.

NOTE. If you repair or replace any circuit board, check to see if it is necessary to

adjust the instrument. (See Table 4-4 on page 4-58.)

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–3

Maintenance

Interior Cleaning

Internal inspe

Item Inspect for Repair action

Circuit board

Resistors Burned, cracked, broken, blistered

Capacitors

Wiring and cables Loose plugs or connectors.

Chassis Dents, deformations, and

ction checklist

Loose, broken, or corroded solder connections. boards. Burned, broken, or cracked circuit-run plating.

condition.

Damaged or leaking cases. Corroded solder on leads or terminals.

Burned, br

damaged h

Burned circuit

oken, or frayed wiring.

ardware.

Remove and replace damaged circu

Remove and replace damaged circuit board.

Firmly seat connectors. Repair or r modules with defective wires or cables.

Straighten, repair, or replac hardware.

it board.

eplace

e defective

1. Blow off dust with dry, low-pressure, deionized air (approximately 9 psi).

2. Remove any remaining dust with a lint-free cloth dampened in isopropyl

alcohol (75% solution) and rinse with warm deionized water. (A cotton-tipped applicator is useful for cleaning in narrow spaces and on circuit boards.)

Lubrication

NOTE. If, after performing steps 1 and 2, an assembly is clean upon inspection,

skip the remaining steps.

3. Gain access to the parts to be cleaned by removing easily accessible shields and panels. (See page 4-5, Removal and Installation.)

4. Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the majority of the alcohol to evaporate.

5. Use hot (120 °F to 140 °F) deionized water to thoroughly rinse them.

6. Dry all parts with low-pressure, deionized air.

7. Dry all components and assemblies in an oven or drying compartment using

low-temperature (125 °F to 150 °F) circulating air.

There is no periodic lubrication required for this instrument.

4–4 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

WAR NI NG . Before performing any procedure in this section, disconnect the power

cord from the or death.

Only Qualiﬁed personnel should perform service procedures. Before performing this procedure, read the General and Service Safety summaries at the beginning of this manual. To prevent possible injury to service personnel or damage to electrical components, read Preventing ESD. (See page 4 -1.)

NOTE. Read the cleaning procedure before disassembling the instrument for

cleaning.

If you replace any circuit board, check to see if it is necessary to adjust the instrument. (See Table 4-4 on page 4-58.)

Removal and Installation

line voltage source. Failure to do so could cause serious injury

Required Equipment

Most assemblies in this instrument can be removed with a screwdriver handle mounted with a size T-15, Torx® screwdriver tip. Use this tool whenever a procedure step instructs you to remove or install a screw unless a different size screwdriver is speciﬁed in that step.

Table 4-1: Required equipment for Removal and Replacement

Item No. Name Description Part number

3T-10Torxtip

4T-15Torxtip

9 Angle-Tip Tweezers

Screwdriver handle Accepts Torx®-driver bits General Tool: 620-440

Screwdriver handle, extended length, 10.5 to 12 inches

T-20 Torx tip

3/16 inch socket tip Used for removing the 3/16 inch hex posts from the

1/8 inch ﬂat-bladed screwdriver Screwdriver for unlocking cable connectors. Standard tool

#0 phillips screwdriver Screwdriver for removing small phillips screws, CD

3/16 inch open-end wrench

Accepts Torx®-driver bits and 3/16 socket tip. Used for removing the T-10 screws and 3/16 inch hex posts from the electrical and optical module slots.

Torx®-driver bit for T-10 size screw heads, used for removing the electrical or optical module chassis.

Used for removing most the screws. Torx®-driver bit for T-15 size screw heads.

Used for removing the handle hardware. Torx®-driver bit for T-20 size screw heads.

electrical and optical module slots.

and hard drive.

Used to remove front panel knobs. Standard tool

Used to remove the rear panel nut posts.

Standard tool or Xcelite 99X10 V N/S#48706

General Tool: 640-235

General Tool: 640-247

General Tool: 640-250

Standard tool

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–5

Removal and Installation

Table 4-1: Required equipment for Removal and Replacement (cont.)

Item No. Name Description Part number

5/16 inch open-end wrench

Coaxial cable connector tool Used to remove coaxial connectors from

Used to remove the rear panel nut posts.

d-subminiature connector housings.

Standard tool

Amp: 58095-1

External Assemblies

WARNING. Before performing any procedure in this section, disconnect the power

cord from the line voltage source. Failure to do so could cause serious injury or death

Figure 4-1: External assemblies

4–6 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Line Fuses and AC Power

Cord

You will need a ﬂ

CAUTION. Power off the instrument before servicing the line fuses or power cord.

Power off the instrument using the Windows shut down procedure, and then turn off the power switch located on the rear of the instrument (or remove the power cord). Powering down the instrument without using the Windows shut down procedure c

1. Power off the instrument using the Windows shut-down process, and then push the re power from the mainframe.

2. Place the you. Locate the two line fuse caps and the AC power cord near the center of the rear panel.

3. To remove line fuses: Remove both fuse caps by turning them counterclockwise using a ﬂat-bladed screwdriver, and remove the line fuses. Reverse the procedure to reinstall.

4. To remove line cord: Disconnect the AC power cord from the rear-panel connector to remove the AC power source.

at-bladed screwdriver.

an corrupt the software on the hard disk.

ar panel power switch or disconnect the AC power cord, to remove

bottom of the instrument on the work surface, with the rear facing

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–7

Removal and Installation

Front-Panel Knobs

You will need an

NOTE. If you are not removing the front panel, you do not need to remove the

front-panel knobs; you can proceed to trim removal.

1. To remove a knob:

a. Hold the kno

front panel about 1/4 inch to create some clearance between the base of the knob and the front panel.

b. Insert the angled-tip tweezers between the knob and front panel and use

them to remove the knob. (See Figure 4-2 on page 4-8.)

c. For replacement knob part numbers, refer to the exploded view and

replaceable parts table. (See Figure 5-3 on page 5-9.)

gled-tip tweezers.

bthatyouwanttoremoveandpullitstraightoutfromthe

Figure 4-2: Knob removal

CAUTION. To prevent damage to the encoders located on the circuit board, apply

pressure to the backs of the encoders while pushing the knob on the shaft.

3. To reinstall a knob:

lign the knob to the shaft.

a.A

b. While applying pressure to the back of the encoder, push the knob in

until it snaps.

4–8 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Trim and Carrying Handle

You will need a T

1. To remove the top cover trim:

a. Remove the ac

b. Remove the four T-15 Torx drive screws that attach the top cover trim to

the instrum the top cover. (See Figure 5-1 on page 5-5.)

c. Hold the ba

to release it from the front panel trim.

d. Pull the f

2. To remove the carrying handle and the right and left side trim panels:

a. Remove the two T-20 Torx drive screws that attach the handle to the

instrument. Remove the handle from the instrument.

b. Slide the side trim panels toward the rear of the instrument allowing the

tabs to clear the cover openings, then pull out to remove the panels from the ins

3. To remove the front panel trim:

a. Hold the trim ring by its top edge and pull toward you to detach the three

plastic snaps. (Alternatively, you can use a ﬂat-bladed screwdriver or othe

-15 Torx driver and a T-20 Torx driver.

cessory pouch; it snaps off. (See Figure 4-1 on page 4-6.)

ent. The T-15 Torx drive screws also attach the snap studs to

ck of the top cover trim and swing it upward and toward you

ront cover trim away from you and remove it from the instrument.

trument.

r small prying tool to help you detach the snaps.)

b. Swing the bottom of the ring up and off the front panel.

4. To remove the acquisition trim:

a. Remove the six T-15 Torx drive screws that attach the acquisition trim to

the instrument. (See Figure 5-1 on page 5-5.)

b. Remove the knobs from the electrical and optical ejector levers (hold the

knobs with your ﬁngers and pull straight out). (See Figure 4-19.)

c. Remove the acquisition trim from the instrument.

CAUTION. Over-tightening the handle screws may cause the handle to break off

from the cabinet. Use a torque wrench to tighten the screws to 8-10 in.lb.

5. To reinstall the covers and handle: Reve rse the steps. Use a torque wrench to tighten the handle screws to 8–10 in. lb.

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–9

Removal and Installation

Bottom Cover

Left and Right Covers

You will need a T

1. To remove the bottom cover: (See Figure 4-1 on page 4-6.)

a. Place the top of the instrument on the work surface, with the bottom

facing you.

b. Remove the ﬁve T-15 Torx drive screws that attach the bottom cover to

the instrument. (See Figure 5-1 on page 5-5.)

c. Remove the bottom cover from the instrument.

2. To rein s ta

You will need a T-15 Torx driver.

1. To access the covers, remove these assemblies:

Trim (all) (See page 4-9.)

Bottom

2. Remove the left and right covers as follows:

NOTE.

mounting hole.

All mounting screw holes are indicated by a star etched around the

-15 Torx driver.

ll the bottom cover: Reverse the steps.

cover(Seepage4-10.)

a. Plac

b. Rem

c. Re

d.P

e. Pull the top-left c over upward and slide to the left to remove from the

CAUTION. Be careful not to bind or snag the covers on the internal cabling of

the instrument as you remove or install the covers.

3. To reinstall the left and right covers: Reverse the steps.

e the rear of the instrument o n the work surface, with the front facing

you.

ove the thirteen T-15 Torx drive screws that attach the covers to the

top and both sides of the chassis. (See Figure 5-1 on page 5-5.)

move the nine T-15 Torx drive screws that attach the covers to the

bottom of the chassis.

ull the bottom-right c over down and slide to the right to remove from

the instrument.

instrument.

4–10 DSA8300 Digital Serial Analyzer and Modules Service Manual

Internal Assemblies

Removal and Installation

Before removing internal assemblies, you must remove the e xternal assemblies. (See page 4-6, External Assemblies.)

Figure 4-3: I nternal assemblies

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–11

Removal and Installation

Front-Panel Assembly

You will need a ﬂ USB port in place, and a 1/8 inch ﬂat-bladed screwdriver.

1. To access the a

Front-Panel trim (See page 4-9.)

CD-RW/DVD drive and trim (See page 4-22.)

2. To remove the Front-Panel assembly: (See Figure 4-3 on page 4-11.)

a. Place the bottom of the instrument on the work surface, with the front

panel facing you.

b. Remove the six T-15 Torx drive screws that attach the Front-Panel

assembly to the front chassis. (See Figure 5-3 on page 5-9.)

c. Hold the bottom of the Front-Panel assembly and pull it toward you

until it catches.

d. From the side, insert the tip of a ﬂat-blade screwdriver directly above the

USB port and below the Front-Panel assembly. There is a piece of ﬂexible metal there that keeps the front panel from slipping over the USB port.

e. Push up on the ﬂexible piece of metal as you pull the Front-Panel

assembly forward and away from the instrument.

at-bladed screwdriver to hold up the metal tab that holds the

ssembly, remove these assemblies:

f. Use the1/8 inch ﬂat-bladed screwdriver to carefully lift up the J1 cable

connector lock. Pull up on the J1 ﬂex cable to disconnect it from the display module assembly. (See Figure 4-4 on page 4-13.) Note the

ition of the pin 1 index mark on the connector and the black stripe

pos on the cable for later reassembly.

g. Pu

3. To reinstall the Front-Panel assembly: Reverse the steps.

ll the Front-Panel assembly forward and remove it from the instrument.

4–12 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Figure 4-4: J1 ﬂex cable connector removal

Front Panel Board

You wil

1. To access the board, remove these assemblies:

2. To r

3. To reinstall the Front-Panel board: Reverse the steps. Verify that the plastic

l need a small ﬂat-bladed screwdriver for prying, and a T-15 Torx driver.

Front-Panel knobs (See page 4-8.)

Front-Panel trim (See page 4-9.)

CD-RW/DVD drive and trim (See page 4-22.)

Front-Panel assembly (See page 4-12.)

emove the Front Panel circuit board: (See Figure 4-3 on page 4-11.)

(See Figure 5-3 on page 5-9.)

a. Re

board to the Front-Panel assembly.

b. Pr

in the pry point access holes to pry the board up from the assembly.

c.R

bezel is ﬂush against the sheet metal. If it is not, the board might not be seated properly over the plastic posts.

move the eight T-15 Torx drive screws that attach the Front-Panel

y the board up off the alignment studs. Place a ﬂat bladed screwdriver

emove the board from the assembly.

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–13

Removal and Installation

Front Panel Keypad

You will need a p

1. To access the assembly, remove these assemblies:

Front-Panel knobs (See page 4-8.)

Front-Panel trim (See page 4-9.)

CD-RW/DVD drive and trim (See page 4-22.)

Front-Panel assembly (See page 4-12.)

Front-Panel board (See page 4-13.)

CAUTION. When removing or installing the keypad, make sure you do not

touch the switch contact with your ﬁngers. The oils in your ﬁngers will degrade or damage the switch contacts. To help prevent damage to the keypad use cotton gloves when removing or installing the keyboard pad.

2. To remove the Front Panel keypad:

a. Use the tweezers to pull on each of the keypad support guides and separate

the keypad from the Front-Panel board.

b. Remove the keypad from the Front-Panel b oard. (See Figure 5-3 on

page 5-9.)

air of tweezers or equivalent tool.

Display Assembly

3. To reinstall the front panel keypad: Reverse the steps. Make sure that the keypad is properly aligned on the Front-Panel board and that the ribbon cable is routed correctly when installing the Front-Panel in the chassis. Refer to

cable connections table for information about where to connect cables.

the (See Table 5-1.)

You will need a T-15 Torx driver.

OTE. You can replace the entire Display assembly. You can also replace the

Display Adapter circuit board individually (it is also a part of the Display assembly).

Other components that make up the Display assembly (such as the LCD display and the Standby/On switch ﬂex circuit) cannot be individually ordered or replaced. If there is a problem with one of these components, return the instrument to Tektronix for repair. See the Contacting Tektronix information at the front of this manual.

4–14 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

1. To access the as

Front-Panel trim (See page 4-9.)

Toptrim(Seepage4-9.)

2. To remove the Display assembly: (See Figure 4-5 on page 4-16.)

a. Place the bottom of the instrument on the work surface, with the front

panel facing you.

b. Remove the four T-15 Torx drive screws that attach the Display assembly

to the chassis.

c. Hold the top and bottom edges of the Display assembly and pull forward

far enough to allow a ccess to the ribbon cable connector.

d. Disconnect the J2 and J3 ribbon cables from the Display assembly.

CAUTION. Do not set the Display assembly on a work surface. Sliding the

instrument over the edge of the work surface could break off the Standby/On switch assembly.

sembly, remove thes e assemblies:

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–15

Removal and Installation

e. Remove the Disp

f. To reinstall the Display assembly: Reverse the steps. Refer to the cable

connections t Table 5-1 .)

g. To rei n s tal

connections table for information about where to connect cables. (See Table 5-1 .)

l the Display assembly: Reverse the steps. Refer to the cable

lay assembly from the instrument.

able for information about where to connect cables. (See

Figure 4-5: Display assembly removal

Display Adapter Board

4–16 DSA8300 Digital Serial Analyzer and Modules Service Manual

You will need a T-15 Torx driver.

1. To access the board, remove these assemblies:

Display assembly (See page 4-14.)

2. To remove the Display Adapter Board from the Display assembly:

a. Disconnect the cables from the Display Adapter board. (See Figure 4-6.)

b. Remove the four T-15 Torx drive screws that attach the Display Adapter

board to the Display assembly. (See Figure 5-3.)

c. Remove the Display Adapter board from the Display assembly.

3. To reinstall the Display Adapter board: Reverse the steps. (See Figure 4-7.)

Removal and Installation

Figure 4-6: Display adaptor board removal

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–17

Removal and Installation

re 4-7: Display adaptor board replacement

Figu

Standby/On Switch Flex

cuit

Cir

4–18 DSA8300 Digital Serial Analyzer and Modules Service Manual

The Standby/On switch ﬂex circuit is a part of the Display assembly, and is not

ividually customer-replaceable. If this component must be replaced, you

ind must return the instrument to Tektronix for repair. See the Contacting Tektronix information at the front of this manual. For reference, refer to the exploded view. (See Figure 5-3.)

Removal and Installation

USB Assembly

You will need a T

1. To remove the USB assembly: (See Figure 4-8 on page 4-19.)

a. Place the bottom of the instrument on the work surface, with the front

panel facing you.

b. Detach the J1 cable.

c. Remove the T

d. Pull the USB assembly toward you to detach it from the instrument.

2. To reinstall the USB assembly: Reverse the steps. Refer to the cable

connections table for information about where to connect cables. (See Table 5-1

-15 Torx driver.

-15 Torx drive screw.

Figure 4-8: USB assembly removal

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–19

Removal and Installation

Hard Disk Drive

You will need a #

CAUTION. Do not remove the replaceable hard disk drive when the mainframe is

powered on; if you do so, damage can occur to the drive and mainframe. Power off the instrument and then turn off the power switch located on the rear of the instrument (or remove the power cord).

2. To remove the hard disk drive assembly:

a. Verify that the chassis is powered down.

b. Place the

panel facing you.

c. Locate th

(See Figure 4-3 on page 4-11.)

d. Remove t

assembly.

e. Hold th

3. To remove the hard disk drive from the assembly: (See Figure 4-9 on

-21.)

page 4

0 Phillips screwdriver.

bottom of the instrument on the work surface, with the rear

e hard disk drive assembly on the rear panel of the instrument.

he two thumbscrews from the front of the hard disk drive

e hard disk drive assembly and slide it out of the instrument.

a. Remove the four #0 Phillips screws that fasten the hard disk drive to the

ridge.

cart

b. Carefully remove the hard disk drive from the cartridge.

4. To reinstall the hard disk drive:

a. Verify that the chassis is powered down.

b. Install the hard disk drive into the cartridge.

c. Slide the assembly into the instrument.

nstall the two thumbscrews to attach the ass embly to the instrument.

d.I

Refer to the cable connections table for information about where to connect cables. (See Table 5-1.)

4–20 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Figure 4-9: Hard disk drive removal

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–21

Removal and Installation

CD-RW/DVD Drive

Assembly

You will need a #

1. To access the assembly, remove these assemblies:

Trim (all) (See page 4-9.)

Bottomcover(Seepage4-10.)

Left and right covers (See page 4-10.)

2. To remove the CD-RW/DVD disk drive assembly: (See Figure 4-3 on page 4-11.) (See Figure 4-10 on page 4-22.)

a. Place the instrument bottom on the work surface, with the front panel

facing you.

b. Remove the two Phillips screws that hold the CD-RW/DVD drive trim to

the mounting frame and remove the trim.

c. Place one thumb on each side of the front of the CD-RW/DVD drive and

your foreﬁngers on the back of the drive.

d. Pull the drive straight toward you until the drive detaches from the CD/HD

interface board.

0 Phillips screwdriver.

Figure 4-10: CD-RW/DVD assembly removal

4–22 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

3. To re m ove the CD

page 4-23.)

a. Remove the fou

to the mounting frame.

b. Remove the d

4. Detach the interface circuit board from the CD-RW/DVD drive.

5. To reinstall the assembly: Reverse the steps. Refer to the cable connections

table for information about where to connect cables. (See Table 5-1.)

-RW/DVD drive from the cartridge: (See Figure 4-11 on

r small Phillips screws that fasten the CD-RW/DVD d rive

rive from the mounting frame.

Figure 4-11: CD-RW/DVD drive removal

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–23

Removal and Installation

CD-RW/DVD and Hard Disk

Drive Mounting Frame

1. To access the fr

Trim (all) (See page 4-9.)

Bottomcover(Seepage4-10.)

Left and right covers (See page 4-10.)

CD-RW/DVD(Seepage4-22.)

Hard drive (See page 4-20.)

2. To remo v e t

a. Place the instrument bottom on the work surface, so that you can access

the mount

b. Remove the six T-15 Torx drive screws that attach the mounting frame

to the AT

c. Remove the CDD/HDD drive cable from the hard drive.

d. Remove the CD-RW/DVD drive cable from the CD-RW/DVD drive.

e. Hold both far side corners of the drive frame; lift up and toward the rear

of the instrument simultaneously.

f. Gently shift the frame from side to side as you pull it to the rear until you

can remove it completely.

ame, remove these assemblies:

he mounting frame:

ing drive frame. (See Figure 4-12.)

Xchassis.

3. To reinstall the mounting frame: Reverse the steps. Refer to the cable connections table for information about where to connect cables. (See Table 5-1 .)

4–24 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Figure 4-12: Hard drive and CD-RW/DVD drive mounting frame removal

ATX Assembly

YouwillneedaT-15Torxdriver.

You can remove and reinstall the ATX as sembly if necessary to gain access to mechanical parts that are replaceable. However, the ATX circuit board is not customer-replaceable and cannot be ordered from Tektronix.

NOTE. If this circuit board or chassis must be replaced, you must return the

product to Tektronix for repair and calibration. See the Contacting Tektronix information at the front of this manual.

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–25

Removal and Installation

1. To access the as

Trim (all) (See page 4-9.)

Bottomcover(Seepage4-10.)

Left and right covers (See page 4-10.)

CD-RW/DVD and hard drive mounting frame (See page 4-24.)

2. To remove the ATX Assembly: (See Figure 4-13.)

a. Place the i

facing you.

b. Remove th

the chassis.

c. Remove t

rear chassis.

d. Hold th

disconnect the R iser Adapter from the edge connector of the PC Processor board.

e. Detach the cable from the USB56 connector on the ATX board.

sembly, remove these assemblies:

nstrument bottom on the work surface, with the side panel

e three T-15 Torx drive screws that attach ATX assembly to

he six T-15 Torx drive screws that attach ATX assembly to the

e front edge of the ATX assembly and pull up on the assembly to

f. Detac

g. Remo

h. To reinstall the ATX assembly, reverse the steps. Refer to the cable

h the cables from the following connectors on the Microprocessor

board: J183, J180, J410, and J510.

ve the ATX assembly from the instrument.

nections table for information about where to connect cables. (See

con Table 5-1 .)

4–26 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Figure 4-13: ATX assembly removal

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–27

Removal and Installation

Power PC Board

You will need a T

1. To access the Power PC board, remove these assemblies:

Trim (all) (See page 4-9.)

Bottomcover(Seepage4-10.)

Left and Right covers (See page 4-10.)

CD-RW/DVD

ATX Assembly (See page 4-25.)

Power Side board (See Figure 5-3.)

2. To remove the Power PC board: (See Figure 4-14.)

a. Set the instrument with the bottom down on the work surface and the

top panel facing you.

b. Disconnect the ribbon cables from the Power PC board.

c. Remove the ten T-15 Torx drive screws securing the Power PC board to

the chassis support.

d. Remove the two 3/16 inch securing nuts that attach the GPIB connector

to the rear of the support bracket.

-15Torxdriveranda3/16inchnutdriver.

and Hard Drive mounting frame (See page 4-24.)

e. Remove the two 3/16 inch securing nuts that attach the Video out

connector to the rear of the support bracket.

f. Lift the Power PC board out of the instrument.

3. To r

einstall the Power PC board: Reverse the steps. Refer to the cable connections table for information about where to connect cables. (See Table 5-1 .)

4–28 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Figure 4-14: Power PC board removal

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–29

Removal and Installation

Power Side Board

1. To access the Po

Rightsidetrim(Seepage4-9.)

Bottomcover(Seepage4-10.)

Right cover (See page 4-10.)

2. To remove the Power Side board:

a. Set the instrument with the bottom down on the work surface and the

right side facing you.

b. Pull the Side Power board our far enough so that you can reach the cables

on the inside-facing front side of the board. Pull the board straight out, disconnecting it carefully from the Low-Vo ltage Power Supply and the Power PC board. (See Figure 5-3 on page 5-9.)

c. Disconnect all of the cables from the Power Side board.

d. Remove the Side Power board completely from the instrument.

3. To replace the Power Side board: Reverse the steps. Refer to the cable

connections table for information about where to connect cables. (See Table 5-1.) Be careful to align the connectors on the Side Power board with the connectors on the Low-Voltage board and the Power PC board.

wer Side board, remove these asse mblies:

Bridge Board

NOTE. Make sure that the connectors on J11, J12, and J13 are fully seated and

the latches are engaged.

that

Reconnect the Power Side board to the Power PC board and the Low-Voltage

er supply carefully, making sure that a ll of the pins match up with the

Pow connectors and are fully seated.

o access the Bridge board, remove these assemblies:

1.T

Trim (all) (See page 4-9.)

Left cover (See page 4-10.)

CD-RW/DVD and Hard Drive mounting frame (See page 4-24.)

2. ToremovetheBridgeboard:(See Figure 4-15 on page 4-32.)

a. Set the instrument with the bottom down on the work surface.

b. Disconnect the cables from the Bridge board.

c. Lift the Bridge board up and out from the chassis.

3. To reinstall the Bridge board: Reverse the steps. Refer to the cable

connections table for information about where to connect cables. (See Table 5-1.) Make sure that the cables are fully seated.

4–30 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Fan Assembly

You will need a T

1. To access the fan assembly, remove these assemblies:

Trim (all) (See page 4-9.)

Bottom cover

Left cover (See page 4-10.)

2. To remove the fan assembly: (See Figure 4-15 on page 4-32.)

CAUTION. Be careful when handling the fan assembly; the fan blades can be

damaged e

a. Set the instrument with the bottom down on the work surface.

b. Disconnect the left and right fan cables from the left and right extender

c. Remove the two T-15 Torx drive screws that attach the fan assembly to

d. Lift the fan assembly up and out from the chassis.

asily.

cables.

the top main chassis.

15 Torx driver.

(See page 4-10.)

3. To reinstall the fan assembly: Reverse the steps. Be sure to connect the cable marked “Left” to the cable extender matched with J391. Connect the cable marked “Right” to the cable extender matched with J390. Refer to the

e connections table for more information about where to connect cables.

cabl (See Table 5-1.)

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–31

Removal and Installation

Figure 4-15: Fan assembly removal

4–32 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Low-Voltage Power Supply

You will need a T

NOTE. See also Checking the Power Supply Voltages in the Troubleshooting

section. (See page 4 -55, Checking the Power Supply Voltages.)

1. To access the Low-Voltage Power Supply, remove these assemblies:

Trim (all) (See page 4-9.)

Bottom cover (See page 4-10.)

Left and Ri

Power Side board (See page 4-30.)

Disconnect the cable (Tektronix part number 174-4241-01) from J01 on

the Electrical Front-E nd board, allowing the clip that holds the cable to remain i

CAUTION. Do not remove the clip that holds the cable in place. To do so

can cause EMI issues.

2. Remove the low-voltage power supply as follows:

-15 Torx driver.

ght covers (See page 4-10.)

nplace.

a. Set the instrument with the bottom on the work surface and the right side

facing you.

b. Disconnect J611 ribbon cable connector from the PC Processor board.

(See Figure 5-4.)

c. Remove the two T-15 Torx drive screws securing the low-voltage power

supply to the right-side chassis support.

d. Remove the three T-15 Torx drive screws securing the low-voltage power

supply to rear chassis.

e. Hold the low-voltage power supply and carefully slide the assembly out

of the mainframe.

3. To reinstall the power supply: Reverse the steps. Refer to the cable connections table for information about where to connect cables. (See Table 5

-1.)

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–33

Removal and Installation

Acquisition System

The Acquisitio Electrical Front-End circuit board and chassis, and the Optical Front-End circuit board and chassis. The circuit boards are not customer replaceable.

If any of these circuit boards must be replaced, return the instrument to Tektronix for repair. However, you can remove the assemblies temporarily, to gain access to cables or mechanical parts that are customer-replaceable. Refer to the Replaceable Parts list to ﬁnd part numbers of replaceable parts.

Removing a circuit board assembly to gain access to mechanic al parts and then reinstalling the same circuit board assembly should not affect the board calibration if you are careful not to loosen or damage any parts.

CAUTION.

instrument operation and calibration.

Before removing the assembly, be sure that this will not affect your product warranty.

n system consists of the Time Base circuit board and bracket, the

Use care not to loosen or damage any parts. This could disrupt

4–34 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

ure 4-16: Acquisition System

Fig

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–35

Removal and Installation

CAUTION. Make sure you reinstall the Torx drive screw and threaded posts in the

correct posit mounting holes. Interchanging the threaded posts with the Torx drive screws could cause damage to your module connector. (See Figure 4-17.)

Do not interchange the small and large sampling module threaded posts. The large slot sampling module threaded posts are single threaded posts and the small slot sampling module posts are double threaded posts. Installing the double threaded posts into the large module slot could damage the large module connector.

One of the nine T-10 Torx screws secures a 5/16 inch hex nut and grounding lug to the inside chassis. When removing the top right T-10 Torx drive screw, make sure this ground nut is retained for later reassembly.

ion. The 3/16 inch hex threaded posts have etched lines around their

ure 4-17: T-10 screws and threaded posts

Fig

4–36 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Time Base circu

The Time Base circuit board is not customer-replaceable and cannot be ordered from Tektroni

1. To access the Time Base circuit board, remove these assemblies:

Trim (all) (See page 4-9.)

Bottom cover (See page 4-10.)

Left and Right covers (See page 4-10.)

2. To remove the Time Base circuit board: (See Figure 4-16 on page 4-35.)

a. Set the in

instrument bottom facing you.

b. Read all

(See page 4-34, Acquisition System.)

c. Remove

are going to replace.

(See F

(See Figure 5-7 on page 5-16.)

it board. You will need a T-15 Torx driver and a 5/16 nut driver.

x. (See page 4-34, Acquisition System.)

strument with the top down on the work surface and the

of the instructions and cautions in the Acquisition System sec tion.

parts as necessary to access the cable or mechanical part that you

igure 5-6 on page 5-15.)

(See Figure 5-8 on page 5-17.)

(See Figure 5-9 on page 5-18.)

3. To reinstall the Time Base assembly: Reverse the steps. Be sure to connect the front-panel screws properly. (See Figure 4-17.) Refer to the cable connections table for information about where to connect cables. (See Table 5-1.)

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–37

Removal and Installation

Electrical Fro

a T-15 driver. You will also need a coaxial cable connector tool, item 12 in the Required Equipment table, to disconnect the coaxial cables from the d-sub connectors on the Electrical Front-End circuit board. (See Table 4-1.)

This circuit board and chassis are not customer-replaceable and cannot be ordered from Tektronix. (See page 4-34, Acquisition System.)

1. To access the Electrical Front-End Assembly, remove these assemblies:

CAUTIO

can cause EMI issues.

nt-End assembly. You will need 1/4” and 5/16” socket drivers, and

Trim (all) (See page 4-9.)

Bottom cov

Left and Right covers (See page 4-10.)

Time Base circuit board (See page 4-37.)

Disconnect the cable (Tektronix part number 174-4241-01) from J01 on

the Electrical Front-End board, allowing the clip that holds the cable to remain in place.

N. Do not remove the clip that holds the cable in place. To do so

er (See page 4-10.)

2. To remove the Electrical Front-End assembly:

a. Set the instrument with the top down on the work surface and the front

facing you.

b. Read all of the instructions and cautions in the Acquisition System sec tion.

(See page 4-34, Acquisition System.)

c. Remove parts as necessary to access the cable or mechanical part that

you are going to replace. (See Figure 5-6 on page 5-15.) (See Figure 5-8 on page 5-17.)

3. To reinstall the Electrical Front-End assembly: Reverse the steps. Be sure to connect the front-panel screws properly. (See Figure 4-17.) Refer to the cable co Table 5-1 .)

nnections table for information about where to connect cables. (See

4–38 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Optical Front-

a coaxia l cable connector tool, item 12 in the Required Equipment table, to disconnect the coaxial cables from the d-sub connectors on the Electrical Front-End circuit board. (See Table 4-1.)

This circuit board and chassis are not customer-replaceable and cannot be ordered fromTektronix. (Seepage4-34,Acquisition System.)

1. To access the Optical Front-End assembly, remove these assem blies:

CAUTION. Do not remove the clip that holds the cable in place. To do so

can ca

End assembly. You will need a T-15 driver. You will also need

Trim (all) (See page 4-9.)

Bottom cov

Left and Right covers (See page 4-10.)

Time Base assembly (See page 4-37.)

Electrical Front-End assembly (See page 4-38.)

Disconnect the cable (Tektronix part number 174-4241-01) from J01 on

the Electrical Front-E nd board, allowing the clip that holds the cable to remain in place.

use EMI issues.

er (See page 4-10.)

2. To remove the Optical Front-End assembly:

a. Place the instrument upside-down on the work surface, with the rear of

the instrument facing you.

b. Read all of the instructions and cautions in the Acquisition System section.

(See page 4-34, Acquisition System.)

c. Remove parts as needed to access the cable or mechanical assembly that

you want to replace. (See Figure 5-6 on page 5-15.) (See Figure 5-9 on page 5-18.)

3. To replace the Optical Front-End assembly: Reve rse the steps. Be sure to connect the front-panel screws properly. (See Figure 4-17.) Refer to the cable connections table for information about where to connect cables. (See Table 5

-1.)

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–39

Removal and Installation

Module Slot Doors

You will need an

NOTE. Before you proceed, please see the information about removing the

Electrical Front-End, Optical Front-End, and Time Base parts. (See page 4-38.) (See page 4-39.) (See page 4-37.)

1. To access the module slot doors, remove these assemblies:

Trim (all) (See page 4-9.)

Bottom cov

Left and Right covers (See page 4-10.)

Power Side board (See Figure 5-3.)

Time Base assembly (See page 4-37.)

Electrical Front-End assembly (See page 4-38.)

Optical Front-End assembly (See page 4-39.)

2. To remo

a. Place the Optical Front-End chassis on the work surface so that you are

looki

gled-tip tweezers.

er (See page 4-10.)

ve the module doors:

ng into the chassis. (See Figure 4-18.)

b. Use the angled-tip tweezers to push in on one of the module door spring

so that the spring will disconnect from the chassis.

arms

c. Repeat with the other spring arm, and remove the module door from the

ssis.

cha

4–40 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

re 4-18: Module slot door removal

Figu

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–41

Removal and Installation

3. To remo v e t h e m o

a. Set the optical chassis so the module ejector levers are facing you.

b. Remove both T-10 Torx drive screws that attach the ejector lever to the

optical chassis. (See Figure 4-19.)

c. Remove both brass washers, ejector lever and ejector spring.

4. Reinstall the ejector levers and module slot doors as follows:

a. Place the ejector spring over the PEM nut standoffs (pivot and slider).

One spring arm is positioned next to the ejector lever spring tab. The other spring arm is positioned to the left-side of the stud post.

b. Place the ejector lever over the ejector spring and PEM nut standoffs

(pivot and slider).

NOTE. Make sure the ejector lever is positioned correctly. The ejector lever

has a di the ejector lever this dimple must be facing up from the optical chassis. (See Figure 4-19.)

c. Place brass shoulder washers over both pivot and slider mounting

mple protruding to accommodate the snap-on handle. When installing

positions.

dule ejector levers:

d. Install both T-10 and Torx drive screws to attach the pivot and slider

mounting positions.

e. Move the left spring arm to the right-side of the stud post. The right spring

arm must be on the left of the lever tab. (See Figure 4-20 on page 4-44.)

4–42 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Figure 4-19: Module ejector handles removal

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–43

Removal and Installation

Figure 4-20: Spring arm position

4–44 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

Electrical Sa

Removing the Cover

mpling Modules

Do not attempt component-level repair of any sampling m odules.

If your electrical sampling module requires repair or replacement, remove the module cover and keep the cover and the attaching hardware. Return the sampling module chassis to Tektronix for service.

The 80E07, 80E08, 80E09, and 80E10 Electrical Remote Sampling modules are exceptions: for these modules, return the entire module assembly to a Tektronix service ce

You can exchange the sampling module at your local Tektronix service center or through t Tektronix information at the front of this manual.

When the cover on the new chassis, using the following instructions.

NOTE. The 80E07, 80E08, 80E09, and 80E10 Electrical Remote Sampling

module

CAUTION. Static discharge can damage any semiconductor in the instrument or

sampling mod modules. Make sure that service is performed only in a static-free work station by aqualiﬁed service technician. Minimize handling of static-sensitive components.

nter without removing the cover.

he central Tektronix exchange in Beaverton, Oregon. See the Contacting

repaired or replacement module chassis is returned to you, install your

s should not be disassembled. Return the entire module assembly.

ule. Wear wrist and foot grounding straps while handling sampling

1. Set the sampling module with the left side down on the work surface and the right side facing you. Refer to the exploded views in the next section, if necessary, for details of speciﬁc electrical modules.

2. Remove the cover: (See Figure 4-21.)

a. Remove the screws that attach the front panel to the cover. Remove the

front p anel.

b. Remove the screws that attach the cover to the chassis and slide the

chassis out toward the rear of the cover.

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–45

Removal and Installation

Figure 4-21: Sample of electrical module hardware removal

Replacing the Chassis

CAUTIO

Transport the sampling module chassis in the original container and store the sampl

When handling the exposed chassis sampling module only, do not touch any expo the circuit board or the rear or front housings.

1. Rei

WARNING. Do not install or remove any sampling modules while the instrument

is powered on. Electrical shock may occur. Always power the instrument down before attempting to remove or insert any sampling module to avoid potential injury from shock.

N. Transport the sampling module chassis with terminations on the inputs.

ing modules on a metal or conductive surface.

sed component on the circuit board. Hold the exposed module by the edges of

nstall the chassis into the cover by reversing the removal procedure. (See

page 4-45, Removing the Cover.)

2. Install the electrical sampling module into one of the instrument small module compartments.

4–46 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

3. Connect one end

of a GPIB cable to the GPIB port of the instrument. Connect

the other end of the cable to the GPIB port of a PC.

CAUTION. For the next step, make sure that you do not have any user interface

dialogs active. Dialogs such as Compensation, System properties will prevent the instrument from responding to GPIB commands.

5. Enter the following GPIB commands to program the serial number (printed on the sampling module cover) into the replacement sampling module chassis:

SYSTem:PROTect OFF

b. SYSTem:PROPerties:CH(1-8):SERialnum <s erialNum_string>

Example: SYST:PROP:CH3 :SER "B010123"

NOTE. For a 2-channel sampling module, either channel can be speciﬁed in

step b. For an 80E01 sampling module, use only the lower numbered channel number, such as CH1 or CH3.

c. SYSTem:PROTect ON

6. Verify the serial number change: Pull down the Utility menu, and then select System Properties, Sampling Modules. Click the channel you want to

fy, such as C3 or C4. This display will conﬁrm the sampling module

veri serial number.

7. Run

compensation from the Utilities menu to verify that the instrument meets

its accuracy speciﬁcations.

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–47

Removal and Installation

Optical Sam pl

ing Modules

When an optical module requires repair or replacement, return the entire module to Tektronix. Do not remove the cover to reuse the serial number as with electrical sampling mod

80A00 and 82A00 Series Modules

1. Set the mod side facing you.

CAUTION. Static discharge can damage any semiconductor in the instrument o r

sampling module. To prevent damage from static discharge wear wrist and foot grounding straps while handling the module chassis. Make sure that service is performed in a static-free work station by a qualiﬁed service technician. Minimize handlin

2. To remove the front panel: (See Figure 4-22.)

g of static-sensitive components.

a. Remove two coaxial terminators on the front panel connectors.

b. Remove two screws that attach the front panel to the cover. Remove the

front panel.

ules.

ule with the left side down on the work surface and the right

3. To remove the cover: (See Figure 4-22 on page 4-49.)

a. Remove the six screws that attach the cover to the chassis.

b. Slide the chassis out toward the rear of the cover.

4–48 DSA8300 Digital Serial Analyzer and Modules Service Manual

Removal and Installation

4. To re move t h e lo

a. Remove the two screws that attach the bracket to its mount. Remove

the bracke t.

b. Lift out the lock-down shaft.

5. To reassemble the module: Perform steps 2 through 4 in reverse to reassemble

the module, considering the following sub-steps as they apply:

a. If installing a replacement front panel, perform the following steps before

installing the front panel:

Remove the backing from the front panel label.

Align the holes and attach the label to the new front panel.

b. If installing a replacement cover, perform the following steps before

replacing the cover:

Remove the backing from the antistatic label.

Install the antistatic label to the replacement cover.

ck-down shaft and bracket: (See Figure 4-22 on page 4-49.)

Figure 4-22: 80A00 and 82A00 series parts removal (80A01 shown)

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–49

Troubleshooting

Required Equipment

This section contains information and procedures designed to help you isolate faulty modules in the instrument. If an assembly must be replaced, follow the removal inst

ructions. (Seepage4-5,Removal and Installation.)

You will nee

d a digital voltmeter to check power supply voltages. (See page 4-55.)

Testing might also be required to correct some faults. In this case, you need the test equip

ment listed in the Adjustment Procedures in this manual.

Check for Common Problems

Use the f

Table 4-2: Possible causes of instrument failure

Failure symptom Possible cause(s) / solutions

Mainframe will not power on

Front panel light comes on (mainframe powers on), but one or more fans will not operate

Mainframe powers on but no signal displayed Wrong channel is selected; select correct channel from front-panel channel

ollowing table to quickly isolate possible failures.

Power cord not plugged in.

Failed fuse.

Faulty power supply.

Faulty modules.

Main power switch (rear panel) not on.

Front panel power switch not on.

Monitor not connected properly.

Faulty fan cable.

Defective fan assembly.

Faulty power supply.

selector or vertical setup menu.

Module not fully installed in the slot.

Signal cable not connected properly.

Wrong trigger input; check trigger cable connection to either direct or prescale trigger input and make sure that the corresponding trigger source is selected in the Trigger Setup menu.

4–50 DSA8300 Digital Serial Analyzer and Modules Service Manual

Troubleshooting

Table 4-2: Possible causes of instrument failure (cont.)

Failure symptom Possible cause(s) / solutions

Controller appears "dead"; power light comes on, but monitor screen(s) is (are) blank

Flat LCD panel display blank Check for a defective cable from Front-Panel board to Bridge board.

Front panel LEDs do not light Replace the Front-Panel board.

Hard disk drive related symptoms

SO DIMMs incorrectly installed or missing.

Defective ATX board.

Check for a defective cable from Power PC board to Front-Panel board.

If an external monitor is plugged in to the DVI-I rear-panel output connector, check for a display on the external monitor:

If there is no display, verify that the monitor is powered on. If the monitor is

powered on, the ATX circuit board assembly might need to be replaced.

If there is a display, the LCD assembly or the Power PC assembly might need to

be replaced.

Defective hard disk drive.

Replaceable hard disk drive not installed.

Power supply failure.

Replaceable hard disk drive or optionally ﬁeld installed ﬁxed hard disk drive not

conﬁgured as bootable (slave) master hard disk drive.

Faulty benchtop controller.

CD-RW/DVD related symptoms Defective CD-RW/DVD.

Defective CD-RW/DVD drive cable.

Diagnostic errors

Compensation errors Verify that each module is completely installed in the slot.

Modules not recognized

Remove all electrical and optical modules from the instrument, then run diagnostics again. If the instrument passes diagnostics, check for the electrical and optical module that is causing the failures. Then run diagnostics again.

If the instrument fails the diagnostics without the installed modules, replace the Time Base assembly, and then run diagnostics again.

Remove all electrical and optical modules from the instrument, and then run compensation again. If the instrument passes compensation, check for the electrical and optical module that is causing the failure.

If the instrument still fails compensation, replace the Time Base assembly.

Module ﬁrm ware incompatible with mainframe software version.

Faulty module. Refer to appropriate module service manual for further troubleshooting information.

Module not fully installed in the slot.

DSA8300 Digital Serial Analyzer and Modules Service Manual 4–51

Troubleshooting

Table 4-2: Possible causes of instrument failure (cont.)

Failure symptom Possible cause(s) / solutions

80C0X modules have no signals displayed Module not fully installed in the slot.

Wrong channel is selected, Waveform Selector and Setup menus.

Signal cable not connected properly.

Replace optical cables.

Replace optical module or Time Base assembly.

80C0X modules; poor noise performance Male ﬁber-ﬁber connections need to be cleaned.

80C0X modules; frequency response exhibits a steep negative "droop" in its plot.

BIOS error messages Refer to the BIOS error message table. (See Table 4-3.)

Instrument locks up

Bad internal O/E RF ampliﬁer de-coupling. Check tightness of all rigid cable

interconnects.

Power off the instrument, and then restart.

Replace the ATX assembly.

Replace the Power PC circuit board assembly.

4–52 DSA8300 Digital Serial Analyzer and Modules Service Manual

Tektronix DSA8300 Digital Serial Analyzer,Modules Service

Specifications and Main Features

Frequently Asked Questions

User Manual