Tektronix TPS2000B Series Service Manual

Download

TPS2000B Series

ZZZ

Digital Storage Oscilloscopes

Service Manual

*P077044701*

077-0447-01

TPS2000B Series

ZZZ

Digital Storage Oscilloscopes

Service Manual

This document supports ﬁrmware version 1.00 and above.

Warning

The servicing instructions are for use by qualiﬁed personnel only. To avoid personal injury, do not perform any servicing unless you are qualiﬁed to do so. Refer to all safety summaries prior to performing service.

Revision A

www.tektronix.com

077-0447-01

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 . Bo x 50 0 Beaverto USA

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

n, OR 97077

In North America, call 1-800-833-9200. World wide , vi sit www.tektronix.com to ﬁnd contacts in your area.

Table of Contents

General Safety Summary .......................................................................................... v

Service Safety Summary...................................... .................................. ................. vii

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

Products.................. .................................. ................................ .................... ix

Related Manuals .... .................................. ................................ ........................ ix

Probe Safety. ................................ .................................. ................................ . x

Speciﬁcations ............................ ................................ .................................. ......... 1

Signal Acquisition System. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. .. . .. ... .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . 1

Time Base System .......................... ................................ ................................ ... 3

Triggering System .................. ................................ .................................. ......... 4

Display............... ................................ ................................ ........................... 7

Batteries.......................... ................................ .................................. ............. 7

External DC Input ............................................................................................. 8

External Interfaces ............................................................................................. 8

Mechanical Characteristics ................................................................................... 9

Environmental Performance.................................................................................. 9

Operating Information ............................................................................................ 11

Theory of Operation. ................................ ................................ .............................. 13

Acquisition Board .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. .. . .. . .. ... . 14

Power Supply and Battery System.......................................................................... 16

Display Module ..... ................................ .................................. ........................ 16

Front Panel .... ................................ ................................ ................................ 16

Performance Veriﬁcation ............... ................................ .................................. ........ 19

Required Equipment.. .................................. ................................ ...................... 19

Test Record ...... .................................. ................................ ............................ 20

Self Test ................................................................................................... 23

Self Calibration....... .................................. ................................ .................. 23

Check DC Gain Accuracy............................................................................... 24

Check DC Measurement Accuracy .................. .................................. ................ 25

Check Bandwidth .................... ................................ .................................. .. 27

Check Sample Rate and Delay Time Accuracy....................... ................................ 28

Check Edge Trigger Sensitivity ... .. . .. .. . .. . .. .. . .. . .. .. . .. .. . .. .. . .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . . 29

Check External Edge Trigger Sensitivity.. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. .. . 30

Adjustment Procedures ........................................................................................... 33

Required Equipment.. .................................. ................................ ...................... 33

Adjustment Procedure........................................................................................ 34

Maintenance........................................................................................................ 41

Preparation........... ................................ .................................. ........................ 41

Preventing ESD............................................................................................... 41

TPS2000B Series Digital Storage Oscilloscopes Service Manual i

Table of Contents

Inspection and

Removal and Installation Procedures................................... ................................ .... 45

Rear Case ................................................................................................. 47

Fan................................. ................................ .................................. ...... 49

I/O Board ................................................................................................. 50

Acquisition Board. . .. .. . .. . . . .. .. . .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. .. . .. . .. .. . . . .. . .. .. . .. .. . 51

Display Ada

Front-Panel Knob ........................................................................................ 54

Front Case ................................................................................................ 54

Front-Panel Board ....................................................................................... 56

Display Module .......................................................................................... 57

Compact Flash Board.................................................................................... 58

Keypad ...... ................................ .................................. ............................ 5

Troubleshooting......... ................................ ................................ ...................... 60

Troubleshooting Tree.................................................................................... 61

Lithium-Ion Battery Maintenance .......................................................................... 66

Repackaging Instructions .... ................................ .................................. .............. 69

Diagrams ........................................................................................................... 71

aceable Parts.. ................................ .................................. .............................. 73

Repl

Parts Ordering Information .......... ................................ .................................. ...... 73

Using the Replaceable Parts List............................................................................ 74

Cleaning.... ................................ .................................. ................ 42

pter Board .................................................................................. 52

ii TPS2000B Series Digital Storage Oscilloscopes Service Manual

List of Figures

Figure 1: TPS2000B Series module-level block diagram. Remove CH3 and CH4 for a 2-channel

version . ................................ ................................ .................................. ...... 13

Figure 2: Adjustment setups ................... .................................. ................................ 35

Figure 3: Re

Figure 4: Modules accessed from the rear of the oscilloscope . .. .. . .. .. . .. .. . .. . .. .. . .. .. . .. ... .. . .. .. . .. ... 50

Figure 5: Using a screwdriver to remove the Acquisition board .. .. . .. .. . .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . . 52

Figure 6: Removing the BNC cover, shell, and retaining nuts ............................................... 54

Figure 7: Removing the front case .............................................................................. 55

Figure 8: Removing the Front-Panel module................................. ................................ .. 56

Figure 9

Figure 10: Removing and installing the keypad . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. 59

Figure 11: Oscilloscope troubleshooting tree (page 1 of 4). .. . .. . .. .. . .. . .. . .. .. . .. . .. . .. .. . .. . .. .. . .. . .. ... . 61

Figure 12: Oscilloscope troubleshooting tree (page 2 of 4). .. .. . .. . .. .. . .. . .. ... .. . .. ... .. . .. ... .. . .. ... .. . .. 62

Figure 13: Oscilloscope troubleshooting tree (page 3 of 4). .. .. . .. . .. .. . .. . .. ... .. . .. ... .. . .. ... .. . .. ... .. . .. 63

Figure 14: Oscilloscope troubleshooting tree (page 4 of 4). .. .. . .. . .. .. . .. . .. ... .. . .. ... .. . .. ... .. . .. ... .. . .. 64

re 15: TPS2000B Series block diagram ................................................................... 71

Figu

Figure 16: Exploded view diagram.............................................................................. 78

moving and installing the rear case . . .. . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . . 48

: Removing the Display module ....................................................................... 57

TPS2000B Series Digital Storage Oscilloscopes Service Manual iii

Table of Contents

List of Tables

Table 1: Signal acquisition system . . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. ... .. . .. .. . .. .. . .. . .. .. . .. .. . .. . .. .. . .. .. . .. 1

Table 2 : Tim

Table 3: Triggering system ............................. ................................ ........................... 4

Table 4: Display .................................................................................................... 7

Table 5: Batteries .............................. ................................ ................................ ..... 7

Table 6: External DC input......................... ................................ ............................... 8

Table 7: External interfaces ....................................................................................... 8

Table 8 : M

Table 9: Environmental performance ............................................................................ 9

Table 10: Required equipment ................................................................................... 19

Table 11: Test record.......... .................................. ................................ .................. 20

Table 12: Required equipment ................................................................................... 33

Table 13: Adjustments (steps 73-108 are for 4-CH models only).............................. .............. 37

14: Internal inspection checklist.......................................................................... 43

Table

Table 15: List of error codes ..................................................................................... 65

Table 16: Parts list column descriptions .................. ................................ ...................... 74

Table 17: Replaceable parts list.................................................................................. 75

e base system ............. ................................ .................................. ......... 3

echanical characteristics ........... .................................. ................................ . 9

iv TPS2000B Series Digital Storage Oscilloscopes Service Manual

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.

Connect and disconnect properly. Connect the probe output to the measurement instrument before connecting the probe to the circuit under test. Connect the probe r eference lead to the circuit under test before connecting the probe input. Disconnect the probe input and the probe reference lead from the circuit under test before disconnecting the probe from the measurement instrument.

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

ormation before making connections to the product.

inf

Do not apply a potential to any terminal, including the common terminal, that

ceeds the maximum rating of that terminal.

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

moved.

Do not operate with suspected failures. If you suspect that there is damage to this

roduct, have it inspected by qualiﬁed service personnel.

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

Replace batteries properly. Replace batteries only with the speciﬁed type and rating.

Recharge batteries properly. Recharge batteries for the recommended charge cycle only.

Use proper AC adapter. Use only the AC adapter speciﬁed for this product.

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

laser radiation exists.

TPS2000B Series Digital Storage Oscilloscopes Service Manual v

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:

WARNING.

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:

vi TPS2000B Series Digital Storage Oscilloscopes Service Manual

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.

UseCareWhenServicingWithPowerOn. Dangerousvoltagesorcurrentsmay 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

TPS2000B Series Digital Storage Oscilloscopes Service Manual vii

Service Safety Summary

viii TPS2000B Series Digital Storage Oscilloscopes Service Manual

Preface

Products

This service manual for the TPS2000B Series Digital Storage Oscilloscopes provides instructions to verify the performance of, calibrate, troubleshoot, and repair the os

cilloscopes to the module level.

Unless noted otherwise, the term "oscilloscope" refers to all of the models in the TPS2000

BSeries.

Related Manuals

This manu

al covers the following products:

TPS2012B Digital Storage Oscilloscope

TPS2014B Digital Storage Oscilloscope

TPS2024B Digital Storage Oscilloscope

These manuals contain additional documentation for the oscilloscopes. They are available at www.tektronix.com/manuals.

ammer manual part

Progr

Language User manual part number

ish

Engl

French 071-2734-XX

Italian 071-2735-XX

German

Spanish

panese

Portuguese 071-2739-XX

Simpliﬁed Chinese

Traditional Chinese

Korean 071-1450-XX

Russian 071-2743-XX

These manuals contain a language overlay for the front-panel controls.

2733-XX

071-

-2736-XX

071

-2737-XX

071

1-2738-XX

071-2740-XX

071-2741-XX

number

0444-XX

077-

TPS2000B Series Digital Storage Oscilloscopes Service Manual ix

Preface

Probe Safety

A guard around the probe body provides a ﬁnger barrier for protection from electric shock.

WARNING. To avoid electric shock when using the probe, keep ﬁngers behind the

guard on the probe body, and do not touch metallic portions of the probe head while it i

Connect the probe output to the oscilloscope before connecting the probe to the cir from the circuit under test before disconnecting the probe from the measurement instrument.

s connected to a voltage source.

cuit under test. Disconnect the probe input and the probe reference lead

x TPS2000B Series Digital Storage Oscilloscopes Service Manual

Speciﬁcations

ignal Acquisition System

Table 1: Signal acquisition system

These speciﬁcations apply to all TPS2000B Series oscilloscopes. To verify that an oscilloscope meets speciﬁcations, it must ﬁrst meet the following conditions:

The oscilloscope must have been operating continuously for twenty minutes within the speciﬁed operating temperature range. (See Table 9.)

You must perform the Do Self Cal operation, accessible through the Utility menu, if the operating temperature changes by more than 5 °C.

The oscilloscope must be within the factory calibration interval of one year.

The V/div speciﬁcations apply with the probe calibration set to 1X probe mode.

Speciﬁcations begin in the following table. All speciﬁcations are guaranteed unless noted "typical." Speciﬁcations that are marked with the

symbol are

checked in the Performance Veriﬁcation section.

Characteristic Description

Number of Input Channels Two (TPS2012B) or four (TPS2014B, TPS2024B) identical channels, digitized simultaneously

Input Coupling DC, AC, or GND

AC coupling connects a capacitor in series with the input circuitry. The DC input impedance becomes very high, since capacitance is in series with all paths to ground.

Ground coupling mode provides a reference waveform derived from the values identiﬁed during SPC. This reference waveform shows visually where signal reference (ground) is expected to be.

Input Impedance, DC Coupled 1 MΩ ±2%inparallelwith20pF±3pF

Maximum Input Voltage (between Signal and Reference at input

BNC)

Maximum Float Voltage

Number of Digitized Bits 8-bit resolution (except when set to 2 m V/div), each channel sampled simultaneously.

Overvoltage Category

CAT I and CAT II

CAT III

At front panel connector, 300 V AC at 3 MHz and above.

All inputs are rated 300 V CAT II, signal to ﬂoating common.

Derate at 20 dB/decade above 100 kHz to 13 V peak AC at 3 MHz and above. For nonsinusoidal waveforms, peak value must be less than 450 V. Excursion above 300 V should be less than 100 ms duration. RMS signal level, including any DC component removed through AC coupling, must be limited to 300 V. If these values are exceeded, damage to the oscilloscope may result. Refer to the Overvoltage Category description. (See Table 9 on page 9.)

Rated 600 V

Between instrument common (chassis) and BNC shell. Using rated connectors or accessories.

RMS

CAT II.

RMS

Maximum Voltage

300 V

RMS

150 V

RMS

; derate at 20 dB/decade above 100 kHz to 13 V peak

TPS2000B Series Digital Storage Oscilloscopes Service Manual 1

Speciﬁcations

Table 1: Signal acquisition system (cont.)

Characteristic Description

Supported Voltage Probe Attenuation Factors

Supported Current Probe Scales 1 mV/mA, 5 mV/mA, 1 mV/A, 10 mV/A, 20 mV/A, 50 mV/A, 100 mV/A, 200 mV/A

Acquisition Modes

DC Gain Accuracy

DC Measurement Accuracy,

ge Acquisition Mode

Avera

DC Voltage Measurement Repeatability, Average Acquisition Mode

Analog Bandwidth

Analog Bandwidth in Sample and Average modes at BNC or with probe set to 10X, DC Coupled, typical

Analog Bandwidth in Peak Detect mode (50 s/div to 5 ms/div), DC coupled, typical

Lower Frequency Limit, AC Coupled

1X, 10X, 20X, 50X, 100X, 500X, 1000X

This adjusts the display scale factor of the instrument to accommodate v arious probe types.

Accuracy of the probe used must be added to the accuracy speciﬁcations of instrument.

The Tektronix probe Interface is not provided, so the user m ust adjust the setting to match the probe characteristics.

This adjusts the display scale factor of the instrument to accommodate v arious probe types.

Accuracy of the probe used must be added to the accuracy speciﬁcations of instrument.

The Tektronix probe Interface is not provided, so the user m ust adjust the setting to match the probe characteristics.

Sample, Peak Detect, and Average

Envelope mode not provided

±3% for Sample or Average acquisition mode, 5 V/div to 10 mV/div

±4% for Sample or Average acquisition mode, 5 mV/div and 2 mV/div

Measurement Type Accuracy

Average of ≥16 waveforms with vertical position at zero

Average of ≥16 waveforms with vertical position not at zero for 2 mV to 200 mV/div.

Average of ≥ 16 waveforms with vertical position not at zero for >200 mVto5V/div.

Change in measured volts between any two averages of ≥ 16 waveforms acquired under the same setup and ambient conditions.

(3% of |reading| + 0.05 div)

Deﬁned in Section 4.6 of IEEE std 1057. The difference between the upper and lower frequencies, at which the amplitude response, as seen in the data record, is 0.707 (-3 dB) of the response seen in the data record at the speciﬁed reference frequency. Speciﬁed only –3 dB point, does not include in-band response.

TPS2012B and TPS2014B TPS2024B

DC to 100 MHz for all V/div settings with bandwidth limit at full.

DC to ≥75 MHz for all V/div settings with bandwidth limit at full.

≤10 Hz at BNC

≤1 Hz when using a 10X passive probe

±(3% × |reading| + 0.1 div + 1 mV)

±[3% × (|reading + vertical position|) + 1% of |vertical position| + 0.2 div + 2 mV]

±[3% × |reading + vertical position| + 1% of |vertical position| + 0.2 div + 50mV]

DC to 200 MHz for all V/div settings 5 mV and above, for operating temperatures from 0°C to 40 °C. DC to 180 MHz for all V/div settings 5 mV/div and above, for operating temperatures from 40 °C to 50 °C

2 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Speciﬁcations

Table 1: Signal acquisition system (cont.)

Characteristic Description

Rise Time at BNC, typical

Peak Detect Response

Vertical P osition Range

Vertical Position Accuracy

Rejection, typical

Channel-Channel Common Mode

Rejection Ratio, typ ical

Channel-to-Channel Crosstalk

Waveform acquisition Rate, typical Up to 180 waveforms per second, per channel (Sample acquisition mode, no measurements)

The maximum peak-to-peak voltage that can be displayed is 40 V

TPS2012B and TPS2014B TPS2024B

<3.5ns <2.1ns

Rise time is generally calculated from the following formula: Rise time in ns = 350 / Bandwidth in MHz

Captures 50% or greater amplitude of pulses ≥12 ns wide typical (50 s/div to 5 μs/div) in the center 8 vertical divisions

2 mV/div to 200 mV/div, ±1.8 V

>200 mV/div to 5 V/div, ± 45 V

2 mV/div to 200 mV/div, ± (1% × selected value +0.1 div + 2 mV) within the range ±1.8 V

>200 mV/div to 5 V/div, ±(1% × selected value +0.1 div + 50 mV) within the r ange ±45 V

Greater than 1000:1 up to 50 MHz, derated to 400:1 at 200 MHzSingle Channel Common Mode

Sine wave with VOLTS/DIV setting at 5 mV. Signal applied between the channel (signal and signal reference) and chassis. Ratio of the acquired signal amplitude to the amplitude of the signal.

100:1 at 60 Hz, reducing to 10:1 with 50 MHz sine wave, with equal volts/div and coupling settings on each channel.

With the same signal applied to each channel, this is the ratio of the acquired signal amplitude to the amplitude of the MATH difference waveform, CH1–CH2, CH2–CH1, CH3–CH4, or CH4–CH3.

TPS2012B and TPS2014B TPS2024B

50 MHz:≥100:1 100 MHz:≥100:1

Measured on one channel, with test signal applied between signal and common of the other channel, and with the same VOLTS/DIV and coupling settings on each channel.

with 1x attenuation.

p-p

Time Base System

Table 2: Time base system

Characteristic Description

TPS2012B and TPS2014B TPS2024BSample Rate Range

5S/sto1GS/s 5S/sto2GS/s

Waveform Interpolation (sin x)/x

Waveform interpolation is activated for sweep speeds of 100 ns/div and faster.

Record Length

Sample Rate and Delay Time

Accuracy

TPS2000B Series Digital Storage Oscilloscopes Service Manual 3

2500 samples for each channel

TPS2012B and TPS2014B TPS2024BSeconds/Division Range

5 ns/div to 50 s/div, in a 1, 2.5, 5 sequence 2.5 ns/div to 50 s/div, in a 1, 2.5, 5 sequence

±50 ppm over any ≥1mstimeinterval

Speciﬁcations

Table2: Timebasesystem(cont.)

Characteristic Description

Position Range

2.5ns/divto10ns/div:(-4div×s/div)to20ms

25 ns/div to 100 ms/div: (-4 div × s/div) to 50 ms

250 μs/div to 10 s/div: (-4 div × s/div) to 50 s

25 s/div to 50 s/div: (-4 div× s/div) to 250 s

Delta Time Measurement Accuracy (Full Bandwidth)

Conditions

Single-shot, sample mode ±(1 sample interval + 100 ppm × |reading|

>16 averages

The limits apply for signals having amplitude > 5 divisions, slew rate at the measurement points of > 2.0 divisions/ns, and acquired > 10 mV/Div.

Sample interval is the time between the samples in the waveform record.

Triggering System

Accuracy

+0.6ns)

±(1 sample interval + 100 ppm × |reading| +0.4ns)

Table 3: Triggering system

Characteristic Description

Holdoff Range

External Trigger Input Impedance

External Trigger Maximum Input Voltage

External Trigger Maximum Float Voltage

500 ns to 10 s

The ability to set large values of Holdoff is limited by the difﬁculty in adjusting the Holdoff at Sec/Div settings less than 100 ms/div. This is because Holdoff cannot be set in Scan Mode, which begins at 100 ms/div when Trigger Mode is AUTO. By adjusting Trigger Mode to NORMAL, the Scan Mode operation is turned off, and Holdoff can be adjusted at larger Sec/Div settings.

1M±2%inparallelwith20pF±3pF

300 V

150 V

CAT 1 and CAT II

RMS

CAT III

RMS

At front panel connector, signal input to BNC shell, 300 V 100 kHz to 13 V peak AC at 3 MHz and above.

Based upon sinusoidal or DC input signal. For nonsinusoidal waveforms, peak value must be less than 420 V. Excursion above 300 V should be less than 100 ms duration. RMS signal level must be limited to 300 V. If these values are exceeded, damage to the instrument may result.

Input is rated 300 V CAT II, signal to ﬂoating common.

Rated 600 V CAT II.

Instrument chassis is normally considered to be at earth ground.

Between instrument chassis and BNC shell

; derate at 20 dB/decade above

RMS

4 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Table 3: Triggering system (cont.)

Characteristic Description

Trigger Sens

itivity, Edge Trigger

Type. DC Coupled

Trigger Sensitivity, Edge Trigger

Type, typical

SET LEVEL TO 50%, typical Operates with input signals equal to or greater than 50 Hz

Trigger Level Range

Trigger Source Sensitivity

All products

TSP2012B

1 div from DC to 10 MHz

1.5 div from 10 MHz to 100 MHz

TPS2014B

TSP2024B 1.5 div from 10 MHz to 100 MHz

2 div from 100 MHz to 200 MHz

EXT

from 50 Hz to 100 MHz

p-p

from 100 MHz to 200 MHz

p-p

EXT/5 5X the value of EXT

EXT/10 10X the value of EXT

The m inimum signal levels required for stable edge triggering of an acquisition when the trigger Source is DC coupled. A stable trigger is one that results in a uniform, regular visual display, triggered on the selected slope. The trigger point must not switch between opposite slopes on the waveform, and the display must not “roll” across the screen on successive acquisitions.

Trigger Frequency Readout typically stabilizes at 25% more signal than generates a stable visual display. At 5 mV/div, 50% additional signal is typically required.

Coupling Sensitivity

AC Same as DC-coupled limits from 50 Hz and above

NOISE REJ Reduces the DC-coupled trigger sensitivity by 2 times for greater

than 10 mv/div to 5 V/div

HF REJ

Same as the DC-coupled limit from DC to 7 kHz, attenuates signals above 80 kHz

LF REJ

Same as the DC-coupled limits for frequencies above 300 kHz, attenuates signals below 300 kHz

Using a 10 M probe will not affect the operation of this function.

Source

CH1, CH2, C H32,

CH4

Range

±8 divisions from center of screen

EXT ±4 V

EXT/5

EXT/10

±20 V

±35 V

The adjustable resolution for Trigger Level is 0.02 division for Ch1 or Ch2 source, (and Ch3, Ch4 for the TPS2014B, TPS2024B)

20 mV for Ext source

100 mV for Ext/5 source

200 mV for Ext/10 source

Speciﬁcations

TPS2000B Series Digital Storage Oscilloscopes Service Manual 5

Speciﬁcations

Table 3: Triggering system (cont.)

Characteristic Description

Trigger Level Accuracy, typical

Default Settings, Video Trigger Coupling is AC and Auto except for a single sequence acquisition

Signal Formats and Field Rates, Video Trigger Type

Sensitivity, Video Trigger Type, typical

Pulse Width Trigger

Pulse Width Trigger modes

Pulse Width Trigger Point

Pulse Width Range

Pulse Width Resolution 16.5 ns or 1 part per thousand, whichever is larger

Equal Guard Band t > 330 ns: ±5% ≤ guard band < ±(5.1% + 16.5 ns)

Not Equal Guard Band t > 330 ns: ±5% ≤ guard band < ±(5.1% + 16.5 ns)

Trigger Frequency Counter

Readout Resolution 6 digits

Accuracy, typical

Accuracies are for signals having rise and fall times ≥20 ns

Source

Internal

EXT

EXT/5 ±(6% of setting + 500 mV) for signals less than ±10 V

EXT/10 ±(6% of setting + 1 V) for signals less than ±20 V

A sine wave with 20 ns rise time corresponds to about 18 MHz.

Supports NTSC, PAL, and SECAM broadcast systems for any ﬁeld or any line

Composite video signal

Source

Internal

EXT

EXT/5 5 V of composite video

EXT/10 10 V of composite video

A 2 division composite video signal will have a 0.6 division sync tip.

Trigger when < (Less than), > (Greater than), = (Equal), or ≠ (Not Equal)

Positive pulse or Negative pulse

Equal: The oscilloscope triggers when the trailing edge of the pulse crosses the trigger level.

Not Equal: If the pulse is narrower than the speciﬁed width, the trigger point is the trailing

edge. Otherwise, the oscilloscope triggers when a pulse continues longer than the time speciﬁed as the Pulse Width.

Less than: The trigger point is the trailing edge.

Greater than (also called time-out trigger): The oscilloscope triggers when a pulse continues

longer than the time speciﬁed as the Pulse Width.

Selectable from 33 ns to 10 s

t ≤ 330 ns: guard band = ±16.5 ns

165 ns < t ≤ 330 ns: guard band = -16.5 ns ±33 ns

t ≤165 ns: guard band = ±16.5 ns

±51 ppm including all frequency reference errors and ±1 count errors

Accuracy

±(0.2div+5mV)within±4divisions from center screen having rise and fall times of >20 ns.

±(6% of setting + 250 mV) for signals less than ±2 V

Range

Peak-to-peak amplitude of 2 div

1 V of composite video

6 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Table 3: Triggering system (cont.)

Characteristic Description

Frequency Range

AC coupled, 10 Hz minimum to rated bandwidth.

Signal Source Pulse Width/ Edge Trigger: all available trigger sources.

Frequency Counter measures trigger source at all times, including when the oscilloscope acquisition is halted due to changes in the run status, or acquisition of a single shot event has completed.

Pulse Width Trigger: The oscilloscope counts pulses of signiﬁ cant magnitude inside the 250 ms measurement window that qualify as triggerable events, such as narrow pulses in a PWM pulse train if set to < mode and the width is set to a relatively small time.

Edge Trigger: The oscilloscope counts all edges of sufﬁcient magnitude and correct polarity.

Video Trigger: The Frequency Counter does not operate.

Available only on 4-channel oscilloscopes.

TPS2024B only.

Display

Speciﬁcations

Table 4: Display

Characteristic

Type

Resolution 320 horizontal by 240 vertical pixels

Brightness, typical

Backlight Intensity

Available through the display menu.

Description

11.5 cm (W) x 8.64 cm (H), 14.38 cm diagonal, ¼ VGA, active TFT color liquid crystal display (LCD) with color characters/waveforms on a black background. Surface anti-glare (3H) treatment

400 typical, 320cd/m

min.

Three strings of 5 LEDs in series.

Variable minimum is 14.85 V.

Variable maximum is 18.15 V.

Typical current is 25 mA for each of the three strings.

Batteries

Table 5: Batteries

Characteristic

Real-Time Clock Battery

Real-Time Clock Battery The battery maintains time-of-day information when the oscilloscope is powered off.

Li Ion Battery Packs

Description

The battery is sized to provide 5 years of service life.

The estimated time that the clock will remain powered from the battery is 5 years. Environmental conditions, especially humidity, affect the number. The battery is not user-replaceable.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 7

Speciﬁcations

Table 5: Batteries (cont.)

Characteristic

Type

Nominal Capacity

Battery Life

Charge time, nominal

Description

System supports 2 type NI2040 Li Ion Battery Packs

6600 mAH

5.5 hours per battery, 2 channel models

4.5 hours per battery, 4 channel models

300 charge/discharge cycles.

Battery will still have 80% of rated capacity after 300 charge cycles.

Instrument nonoperating: 4.5 hours

Instrument operating: 6.5 hours

External DC Input

Table 6: External DC input

Characteristic

Voltage 15 V, ±1 V

Current consumption

Connector type

Description

The input is not protected from the electrically harsh automobile electrical system. Operation from a vehicle requires a speciﬁcally designed external power supply.

Typical Power draw from External DC input:

2 channel models, charging a battery: 21 W

2 channel models, no battery: 13 W

4 channel models, charging a battery: 30 W

4 channel models, no battery: 18 W

Charging only, instrument OFF: 28 W

Maximum power draw from AC line by AC Adapter, 36 watts

2.5 mm male. Use a mating connector with a 2.5 mm barrel hole.

Center conductor: positive

Outer conductor: negative

External Interfaces

Table 7: External interfaces

Characteristic Description

Interfaces for data communication and probe compensation

Probe Compensator output voltage, typical

Probe Compensator output frequency, typical

8 TPS2000B Series Digital Storage Oscilloscopes Service Manual

RS-232, Parallel port, Compact ﬂash, Probe compensation

5 V p-p, ±10% into ≥1MΩ load

1kHz

Speciﬁcations

Mechanical Ch

aracteristics

Table 8: Mechanical characteristics

Characteris

tic

Weight, approximate

Dimensions, without

front prot

Dimensi

ective cover

ons, with front

protective cover

ng method

Cooli

Description

Instrument only

1 battery installed

2 batteries installed

Height

Width

Depth

Height

Width

Depth

rature controlled fan. Intake vents on the bottom; exhaust on the right side.

Temp e

2.7kg(6.0lb

3.2kg(7.0l

3.7kg(8.0

lbs)

161 mm (6.3

336 mm (13

130 mm (5.

164 mm (6

347 mm (

135 mm (

1in)

.45 in)

13.65 in)

5.3 in)

bs)

3in)

.24 in)

Environmental Performance

Table 9: Environmental performance

Characteristic

Temperature

Humidity

Altitude, Operating and

Nonoperating

Pollution Degree 2

Random Vibration

Mechanical Shock,

operating

Charge battery packs between 0 °C and 45 °C (32 °F to 113 °F). Charging battery packs outside this range can damage cells or cause them to leak. Battery packs are rated to operate between -10 °C and +50 °C (-14 °F and +122 °F) with less than 80% relative humidity. Operating outside this range can

cause damage. Battery discharge capacity drops signiﬁcantly at temperatures below 0 °C (32 °F) and above 45 °C (113 °F). Max wet bulb. With one battery pack installed.

Description

Operating

0°C to 50 °C (32 °F to 122 °F), with 5°C/minute maximum gradient,

Nonoperating

-40 °C to +71 °C (-40 °F to 159.8 °F), with 5°C/minute maximum gradient.

noncondensing, up to 3000 altitude.

Operating

5% to 90% relative humidity (%RH) at up to +30 °C (86 °F )

5% to 60% relative humidity (%RH) at up to +50 °C (122 °F)

Nonoperating

5% to 90% relative humidity (%RH) at up to +30 °C (86 °F)

5% to 60% relative humidity (%RH) between +30 °C (86 °F) and +71 °C ( 160 °F) noncondensing.

3,000 m (10,000 ft)

Altitude is limited by possible damage to the LCD at higher altitudes. This damage is independent of operation.

Operating

0.31 g

from 5 Hz to 500 Hz, 10 minutes

RMS

on each axis, 3 axes (30 minutes total).

Nonoperating

2.46 g

from 5 Hz to 500 Hz, 10 minutes on each axis,

RMS

3 axes (30 minutes total).

Half-sine mechanical shocks, 50 g peak amplitude, 11 ms duration, 3 drops in each direction of each axis (18 total)

TPS2000B Series Digital Storage Oscilloscopes Service Manual 9

Speciﬁcations

10 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Operating Information

For information on installing and operating your TPS2000B Series Digital Storage Oscilloscope, refer to the TPS2000B Series Digital Storage Oscilloscope User Manual.(See

page ix, Related Manuals.)

TPS2000B Series Digital Storage Oscilloscopes Service Manual 11

Operating Information

12 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Theory of Operation

This section describes the electrical operation of the TPS2000B Series oscilloscopes to the module level. It describes the basic operation of each functional c

ircuit block shown in the following ﬁgure.

Figure 1: TPS2000B Series module-level block diagram. Remove CH3 and CH4

r a 2-channel version

TPS2000B Series Digital Storage Oscilloscopes Service Manual 13

Theory of Operation

Acquisition Board

The Acquisition board of the TPS2000B Series four-channel oscilloscope is essentially a dual, two-channel oscilloscope tied together through a common microprocessor, and some special interconnects. This allows the combining of the display and trigger systems. The focus of this Acquisition board discussion is on the two-cha

At a minimum, the Acquisition board contains the following components:

Attenuators

ASIC ampliﬁer

Isolation circuit

Digitizer-trigger system ASIC

nnel system, with differences noted as necessary.

Acquisition System

Signal-

RAM

FLASH ROM

Microprocessor

Internal peripheral interface

Power supplies

For a the other aspects o f the circuitry are the same as for the two-channel oscilloscope.

Signals from the CH 1, CH 2, and other input connectors pass through attenuators

danAC-couplingswitchtotheampliﬁer ASIC. The EXT TRIG input uses

an an abbreviated version of this path, without some of the attenuator settings and the AC coupling switch.

The ampliﬁer ASIC contains buffers and variable gain ampliﬁ ers, as well as ﬁlters that provide 20 MHz bandwidth limiting. The task of the ampliﬁer ASIC is to convert from a 1 MΩ single-ended environment in the input to a much lower impedance differential (and thus less noise-sensitive) environment for the isolation and acquisition process. The ampliﬁer ASIC assures that the input signal is ampliﬁed to approximately the correct level to allow the fullest possible use of the isolation circuit and digitizer.

processing/display/system services ASIC

four-channel oscilloscope, the attenuators and ASICs are duplicated. Most of

The isolation circuit uses a modulation clock to transfer the input signal across the isolation boundary via an isolation transformer. The input signal is demodulated and sent to the acquisition ASIC. Control of the ampliﬁer ASIC across the isolation boundary is provided by an optocoupler. Power is provided to each ampliﬁer A S IC and associated circuits by an isolated switching power supply, dedicated to each channel.

14 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Theory of Operation

Processing and Display

System

Each acquisiti converter, and the trigger logic. The digitized waveform samples are transferred to the processing and display ASIC. In four-channel systems, the two acquisition ASICs are interconnected so that a trigger on one ASIC c an produce a trigger on the other.

The processor system adds the microprocessor and FLASH ROM to the processing and display system. The processor system interprets the front-panel control changes detected by the display ASIC, provides control parameters based upon user s the internal and external peripherals. Saved setups, waveforms, and calibration constants are stored in nonvolatile memory (NVRAM). The processor system shares DRAM with the display system.

The processing and d isplay system consists of the display ASIC, DRAM, and system oscillator. Digitized acquisition samples are received by the display ASIC and stored in DRAM. Once data are received by the display ASIC, various corrections are applied, display rasterization is performed, and the waveform is placed into a display buffer. At the same time, the waveform is being read from

splay buffers and written to the LCD. Additional circuitry in the display

the di ASIC supports scanning of the front panel, provides DRAM refresh, p rocesses the clock, and performs various memory mapping tasks required by all elementary microprocessor-based systems. In a four-channel system, the two display ASICs are interconnected so that one ASIC may provide display information for the second.

on ASIC contains samplers and peak detectors, an ampliﬁer, an A/D

etting requests, computes waveform measurements, and manages

Probe Compensation

Acquisition Board Power

The processing and display system handles some of the computational tasks. Other tasks are performed by the processor system. Since all array processing

performed in the processing and display system, no computations can be

is performed that involve data from two different channel sets. Thus, subtracting channel 3 data from channel 2 is prohibited.

The PROBE COMP and ground terminals are provided for probe adjustment.

The IO board supplies the Acquisition board with 5.0, 3.0, 3.3, and 15 VDC.These sources are used directly or as sources for other converters on the Acquisition board. The Acquisition board supplies 35 volts used for series-strings of LEDs on the front panel for button illumination.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 15

Theory of Operation

Power Supply a

Display Module

nd Battery System

The IO board accepts the power input for the oscilloscope from either a 15 V external supply or from one of two internal Lithium-Ion battery packs. The battery pack

A microcontroller manages the routing of power from the DC input and the two battery pac the Acquisition board.

The instru on and off, having its voltage varied by signals from the Acquisition board.

Power for dimming voltage, derived from a PWM pulse train and RC low-pass ﬁlter, controls the brightness o f the backlight.

RS-232 and Parallel port signals are passed from the Acquisition board through the IO board to their rear-mounted connectors.

The Liquid Crystal Display pattern consists of 320 columns with 3 subcolumns and 240 rows, and has associated drivers and a backlight.

s are SMBus compliant and user replaceable.

ks. It also manages the charging of batteries and communication to

ment cooling fan is powered by the IO board. The fan can be switched

the LCD Backlight Inverter board is supplied by the IO board. A

Front Panel

Oscilloscopes

Four-Channel

Oscilloscopes

Two-

Channel

All switches, position encoders, and LEDs are mounted on the Front Panel board of the two-channel oscilloscope. Additionally, an IC on this board provides buffering and multiplexing of switch signals for the Acquisition board. (Two

gnals and a sense line are provided by the Acquisition board to support the front

si panel.) One of these signals resets the scan, and a second clocks the scan to the next position. The sense line receives the current state of the selected switch or encoder position.

For the encoders, some amount of debouncing occurs inside the front-panel IC. All key debouncing is handled in the display ASIC on the Acquisition board.

The Front Panel board for four-channel oscilloscopes is effectively two front panels in parallel. The left side of the board is largely handled by the display ASIC for channels 1 and 2. The right side of the board is handled by the channel 3 and 4 ASIC. Separate front-panel ICs support these data paths.

16 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Theory of Operation

LEDs

Internal Peripherals

External Peripherals

The front panel Autorange controls, or the multipurpose knob are active. In addition, most buttons have an LED behind them for illumination in low-light conditions. Button illumination can be turned off in the Utility menu.

The Acquisition board includes an FPGA that manages communication between the microprocessor and the internal program memory (FLASH), RTC (Real-Time Clock), battery system, and temperature sensor. The temperature sensor is used for fan control.

The Acquisition board FPGA also manages communication between the microprocessor and external RS-232 port, Printer Port, and Compact FLASH Card.

contains three LEDs that light to indicate when the Save or

TPS2000B Series Digital Storage Oscilloscopes Service Manual 17

Theory of Operation

18 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Performance Veriﬁcation

This section contains performance veriﬁcation procedures for the speciﬁcations marked with the √ symbol. The following equipment, or a suitable equivalent, is required to c

Required Equipment

omplete these procedures.

Table 10: R

Descripti

DC Voltage

Leveled S

Generator

Time Mark Generator

50Ω BNC Cable BNC male to BNC male, ≈ 1 m (36 in) long

50Ω BNC Cable BNC male to BNC male, ≈ 25 cm (10 in) long

50Ω Feedthrough

Termi n

Dual B

Adapter

Splitter, Power Frequency range: DC to 4 GHz. Tracking: >2.0%

equired equipment

Source

ine Wave

ation

anana to BNC

Minimum re

17.5mVto7

50 kHz and

10 ms peri

BNC male and female connectors

Banan

quirements

V, ±0.5% accuracy

200 MHz, ±3% amplitude accuracy

od, ±10 ppm accuracy

a plugs to BNC female

Examples

Fluke 9100 with Oscilloscope Calibration Module (Option

250)

Fluke 550 Oscilloscope Calibration Option (Option 5500A-SC)

Tektronix part number 012-0482-XX

Tektronix part number 012-0208-XX

Tektronix part number 011-0049-XX

Tektronix part number 103-0090-00

Tektr

Universal Calibration System

0A Multi-product Calibrator with

onix part number 015-0565-XX

TPS2000B Series Digital Storage Oscilloscopes Service Manual 19

Performance Veriﬁcation

Test Record

Table 11: Test record

Instrument Serial Number:

racy

5 mV/div

200 mV/div

2V/div

5 mV/div

200 mV/div

2V/div

5 mV/div

200 mV/div

2V/div

5 mV/div

200 mV/div

2V/div

High value (measured)

Low value (measured) Low limit

Temperature

Date of Calibration:

Test Passed Failed

Self Test

Oscilloscop tests

Channel 1 DC Gain Accuracy

Channel 2 DC Gain Accuracy

Channel 3 DC Gain Accura

Channel 4 DC Gain Accu

Certiﬁcate Number:

RH %:

Technician:

33.6 mV 36.4 mV

1.358 V 1.442 V

13.58 V 14.42 V

33.6 mV 36.4 mV

1.358 V 1.442 V

13.58 V 14.42 V

33.6 mV 36.4 mV

1.358 V 1.442 V

13.58 V 14.42 V

33.6 m

1.35

13.5

Test result (High value – low value) High limit

36.4 m

1.44

14.4

20 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Performance Veriﬁcation

Channel 1

DC Measurement

Accuracy

Channel 2

DC Measurement

racy

Accu

5 mV/div

Vertical Posi

tion = 0

15.5 mV 19.5 mV

pos

Vertical Position = –17.6 mV 31.3 mV 38.6 mV

200 mV/div

Vertical Position = 0 658 mV 742 mV

Vertical Po

sition = –704 mV

1.33 V 1.46 V

2V/div

Vertical Position = 0 6.59 V 7.41 V

Vertical Position = –7.04 V 13.3 V 14.7 V

5 mV/div

Vertical

Position = 0

–19.5 mV –15.5 mV

neg

Vertical Position = 17.6 mV –38.6 V –31.3 V

200 mV/div

Vertical Position = 0 –742 mV –658 mV

al Position = 704 mV

Vertic

–1.46 V –1.33 V

2V/div

Vertical Position = 0 –7.41 V –6.59 V

Vertical Position = 7.04 V –14.7 V –13.3 V

5 mV/div

Vert

ical Position = 0

15.5

pos

Vertical Position = –17.6 mV 31.3 mV 38.6 mV

200 mV/div

Vertical Position = 0 658 mV 742 mV

rtical Position = –704 mV

/div

33 V

Vertical Position = 0 6.59 V 7.41 V

Vertical Position = –7.04 V 13.3 V 14.7 V

5 mV/div

neg

Vertical Position = 0 –19.5 mV –15.5 mV

Vertical Position = 17.6 mV –38.6 V –31.3 V

200 mV/div

Vertical Position = 0 –742 mV –658 mV

Vertical Position = 704 mV –1.46 V –1.33 V

2V/div

Vertical Position = 0 –7.41 V –6.59 V

Vertical Position = 7.04 V –14.7 V –13.3 V

19.5

46 V

TPS2000B Series Digital Storage Oscilloscopes Service Manual 21

Performance Veriﬁcation

Channel 3 DC Measurement Accuracy

Channel 4 DC Measurement

uracy

Acc

Channel 1 Bandwidth

Channel 2 Bandwidth

Channel 3 Bandwidth

5mV/div

Vertical Posi

tion = 0

15.5 mV 19.5 mV

pos

Vertical Position = –17.6 mV 31.3 mV 38.6 mV

200 mV/div

Vertical Position = 0 658 mV 742 mV

Vertical Po

sition = –704 mV

1.33 V 1.46 V

2V/div

Vertical Position = 0 6.59 V 7.41 V

Vertical Position = –7.04 V 13.3 V 14.7 V

5mV/div

Vertica

l Position = 0

–19.5 mV –15.5 mV

neg

Vertical Position = 17.6 mV –38.6 V –31.3 V

200 mV/div

Vertical Position = 0 –742 mV –658 mV

al Position = 704 mV

2V/di

Vertic

–1.46 V –1.33 V

Vertical Position = 0 –7.41 V –6.59 V

Vertical Position = 7.04 V –14.7 V –13.3 V

5mV/div

Vert

ical Position = 0

15.5

pos

Vertical Position = –17.6 mV 31.3 mV 38.6 mV

200 mV/div

Vertical Position = 0 658 mV 742 mV

rtical Position = –704 mV

/div

33 V

Vertical Position = 0 6.59 V 7.41 V

Vertical Position = –7.04 V 13.3 V 14.7 V

5mV/div

neg

Vertical Position = 0 –19.5 mV –15.5 mV

Vertical Position = 17.6 mV –38.6 V –31.3 V

200 mV/div

Vertical Position = 0 –742 mV –658 mV

Vertical Position = 704 mV –1.46 V –1.33 V

2V/div

Vertical Position = 0 –7.41 V –6.59 V

Vertical Position = 7.04 V –14.7 V –13.3 V

2.12 V

19.5

46 V

—

22 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Performance Veriﬁcation

Channel 4 Bandwidth

Sample Rate and Delay Time Accuracy

Channel 1 Edge Trigger Sensitivity Stable trigger

Channel 2 Edge Trigger Sensitivity Stable trigger

Channel 3 Edge Trigger Sensitivity

Channel 4 Edge Trigger Sensitivity

External Edge Trigger Sensitivity Stable trigger

Channels 3 and 4 are only on four channel oscilloscopes.

2.12 V

-2 divs +2 divs

Stable trigger

Performance Veriﬁcation Procedures

Before beginning these procedures, two conditions must be met:

The oscilloscope must have been operating continuously for twenty minutes within the operating temperature range speciﬁed in the environmental

cations. (See Table 9 on page 9.)

speciﬁ

You must perform the following Self Calibration operation. If the ambient

rature changes by more than 5 °C, you must perform the Self Calibration

tempe operation again.

ime required to complete the entire procedure is approximately one hour.

The t

—

Self Test

Self Calibration

WAR N ING. Some procedures use hazardous voltages. To prevent electrical

shock, always set voltage source outputs to 0 V before making or changing any interconnections.

This internal procedure is automatically performed every time the oscilloscope

s powered on. No test equipment or hookups are required. Verify that no error

i messages are displayed before continuing with this procedure.

The self calibration routine lets you quickly optimize the oscilloscope signal path for maximum measurement accuracy. You can run the routine at any time, but you should always run the routine if the ambient temperature changes by 5 °C or more.

1. Remove signals from all channels.

2. Push the UTILITY button and select the Do Self Cal option to start the

calibration. This routine can take up to ﬁve minutes to complete.

3. Verify that instrument passed self-calibration.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 23

Performance Veriﬁcation

Check DC Gain Accuracy

This test check

s the DC gain accuracy of all input channels.

1. Set the DC voltage source output level to 0V.

2. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP

Channel 1

ACQUIRE

——

Voltage Pro

Average 64

Source Channel 1MEASURE

Type Mean

3. As shown in the following ﬁgure, connect the oscilloscope channel to be tested to the DC voltage source.

4. For each VOLTS/DIV setting listed in the following table, perform the following steps:

a. Set the DC voltage source output level to the positive voltage listed and

record the mean measurement as V

pos

b. Reverse the polarity of the DC voltage source and record the mean

neg

pos-Vneg

and compare V

to the accuracy limits in

diff

measurement as V

c. Calculate V

diff

the table.

DC voltage source

VOLTS/DIV setting

5 mV/div

200 mV/div

2V/div

output levels Accuracy limits for V

+17.5 mV, -17.5 mV 33.6 mV to 36.4 mV

+700 mV, -700 mV 1.358 V to 1.442 V

+7.00 V, -7.00 V 13.58 V to 14.42 V

5. Set DC voltage source output level to 0V.

diff

24 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Performance Veriﬁcation

Check DC Measurement

Accuracy

6. Disconnect the

test setup.

7. Repeat steps 1 through 6 until all input channels have been checked (CH1 and CH2 for a two-c

hannel model; CH1, CH2, CH3, and CH4 for a four-channel

model.)

This test checks the DC meas urement accuracy of all input channels.

1. Set the DC voltage source output level to 0V.

2. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP

Channel 1

ACQUIRE

3. As sho

wn in the following ﬁgure, connect the oscilloscope channel selected in

——

Voltage Probe 1X

Average 64

Source Channel 1MEASURE

Type Mean

the table to the DC voltage source.

4. Record DC Measurement Accuracy with Vertical Position set to 0V

a. Ensure that the Vertical Position is set to zero.

b. Set the DC voltage source output level to the positive voltage listed in the

following table and write the mean measurement in the test record as

with Vertical Position at zero.

pos

c. Set the DC voltage source output level to the negative voltage listed in

the following table and write the mean measurement in the test record as

with Vertical Position at zero.

neg

TPS2000B Series Digital Storage Oscilloscopes Service Manual 25

Performance Veriﬁcation

d. Repeat for all s

ettings in the table and ensure that all readings are within

the limits given in the test record.

DC voltage source output levels

when Vertical Position is set to 0V

Volts/div setting V

5 mV/div

200 mV/div

2V/div

5. Record DC

Measurement Accuracy with Vertical Position not set to 0V

pos

+17.5 mV –17.5 mV

+700 mV –700 mV

+7 V –7 V

neg

a. Set the instrument's Volts/div with the settings shown in the following

table. Set the Vertical Position to: (–1 × (the offset value listed in the table)). Set the DC voltage source output level to the V In the test record, write the mean measurement as V

value from the table.

pos

with Vertical

pos

Position not zero.

b. Set the Vertical Position to the offset value listed in the following table.

Set the DC voltage source output level to the V In the test record, write the mean measurement as V

tion not zero.

Posi

value from the table.

neg

with Vertical

neg

c. Repeat for all settings in the table and ensure that all readings are within

limits given in the test record.

the

DC voltage source output levels

n Vertical Position is not set to OV

Whe

Volts/div setting Offset V

5 mV/div

200 mV/div

2V/div

17.6 mV +35 mV –35 mV

0.704 V +1.4 V –1.4 V

7.04 V +14 V –14 V

pos

neg

6. Set DC voltage source output level to 0V.

7. Disconnect the test setup.

8. Repeat steps 1 through 7 until all input channels have been checked (CH1 and

CH2 for a two-channel model; CH1, CH2, CH3, and CH4 for a four-channel model.)

26 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Performance Veriﬁcation

Check Bandwidth

This test check

s the bandwidth of all input channels.

1. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP

Channel 1

ACQUIRE

TRIGGER Coupling

——

Voltage Probe 1X

Average 16

Noise

Source Channel 1MEASURE

Type Pk-Pk

2. As shown in the following ﬁgure, connect the oscilloscope channel selected in the table to the leveled sine wave generator.

3. Set the oscilloscope VOLTS/DIV to 500 mV/div.

4. Set

the oscilloscope SEC/DIV to 10 μs/div.

5. Set the leveled sine wave generator frequency to 50 kHz.

6. Set the leveled sine wave generator output level so the peak-to-peak measurement is between 2.98 V and 3.02 V.

7. Set the levele d sine wave generator frequency to:

100 MHz if you are checking a TPS2012B/2014B.

200 MHz if you are checking a TPS2024B, 180 MHz for operating

temperaturesfrom40°Cto50°C.

8. Set the oscilloscope SEC/DIV to 10 ns/div.

9. Check that the peak-to-peak measurement is ≥2.12 V.

10. Disconnect the test setup.

11. Repeat steps 1 through 10 until all input channels have been checked.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 27

Performance Veriﬁcation

Check Sample Rate and

Delay Time Accuracy

This test check

sthetimebaseaccuracy.

1. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP

Channel 1

——

Voltage Probe 1X

2. Connect the oscilloscope to the time mark generator as shown in the following

ﬁgure.

4. Set the time mark generator period to 10 ms.

5. Set the oscilloscope VOLTS/DIV to 500 mV/div.

6. Set th

e oscilloscope Main SEC/DIV to 1ms/div.

7. Press SET LEVEL TO 50%.

8. Use the vertical POSITION control to center the test signal on screen.

9. Use the horizontal POSITION control to set the position to 10.00 ms.

10. Set the oscilloscope SEC/DIV to 250 ns/div.

11. Check that the rising edge of the marker crosses the center horizontal g raticule

line within ±2 divisions of center graticule.

NOTE. One division of displacement from graticule center corresponds to a 25

ppm time base error.

12. Disconnect the test setup.

28 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Performance Veriﬁcation

Check Edge Trigger

Sensitivity

This test check

s the edge trigger sensitivity for all input channels.

1. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP

Channel 1

TRIGGER

ACQUIRE Sample

——

Voltage Probe 1X

Mode Normal

—

Source Channel 1MEASURE

Type Pk-Pk

2. As shown in the following ﬁgure, connect the oscilloscope channel selected in the table to the leveled sine wave generator.

3. Set the oscilloscope VOLTS/DIV to 500 mV/div.

4. Set the oscilloscope SEC/DIV to 25 ns/div.

5. Set the leveled sine wave generator frequency to 10 MHz.

6. Set the leveled sine wave generator output level to approximately 500 mV

so that the measured amplitude is approximately 500 mV. (The measured

p-p

amplitude can ﬂuctuate around 500 mV.)

7. Press SET LEVEL TO 50%.AdjustTRIGGER LEVEL as necessary and check that triggering is stable.

8. Set the leveled sine wave generator frequency to the following:

100 MHz if you are checking a TPS2012B/2014B.

200 MHz if you are checking TPS2024B.

9. Set the oscilloscope SEC/DIV to 10 ns/div.

10. Set the leveled sine wave generator output level to approximately 750 mV

p-p

so that the measured amplitude is approximately 750 mV. (The measured amplitude can ﬂuctuate around 750 mV.)

TPS2000B Series Digital Storage Oscilloscopes Service Manual 29

Performance Veriﬁcation

Check External Edge

Trigger Sensitivity

11. Press SET LEVEL

TO 50%. Adjust TRIGGER LEVEL as necessary and

check that triggering is stable.

12. Change the osc

Press menu button Select menu option Select setting

TRIGGER Slope

illoscope setup using the following step:

Falling

13. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and check that

triggering is stable.

14. Disconnect the test setup.

15. Repeat steps 1 through 14 until all input channels have been checked.

This test checks the edge trigger sensitivity for the external trigger.

1. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP

Channel 1

TRIGGER

ACQUIRE Sample

——

Voltage P robe 1X

Source

Mode Normal

Source CH1MEASURE

Type Pk-Pk

Ext

—

2. Connect the oscilloscope to the leveled sine wave generator as shown in the following ﬁgure.

30 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Performance Veriﬁcation

3. Set the leveled

sine wave generator frequency to the following:

100 MHz if you are checking a TPS2012B/TPS2014B/TPS2024B (1 V

from 10 MHz to 1

00 MHz).

200 MHz if you are checking TPS2024B (2 V from 100 MHz to

200 MHz).

4. Set the oscilloscope VOLTS/DIV to 500 mV/div.

5. Set the oscilloscope SEC/DIV to 10 ns/div.

6. Set the leveled sine wave generator output to the following levels:

TPS2012B/TPS2014B/TPS2024B, 100 MHz measurement: 1V

TPS2024B, 200 MHz measurement: 2V

p-p

NOTE. The measured amplitude can ﬂuctuate around 1 V for the

TPS2012B/TPS2014B/TPS2024B 100 MHz measurement and 2 V for the TPS2024B 200 MHz measurement.

7. Press S

ET LEVEL TO 50%.AdjustTRIGGER LEVEL as necessary and

check that triggering is stable.

8. Chang

Press menu button Select menu option Select setting

TRIGGER Slope

e the oscilloscope setup using the following step:

Falling

9. Press SET LEVEL TO 50%.AdjustTRIGGER LEVEL as necessary and ck that triggering is stable.

che

10. Disconnect the test setup.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 31

Performance Veriﬁcation

32 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Adjustment Procedures

This section contains adjustment procedures for the TPS2000B Series oscilloscopes.

Only qualiﬁed personnel should perform service procedures. Read the Service Safety Summary and the General Safety Summary at the b eginning of this manual before performing any service procedures.

NOTE. The voltage references inside TPS2000B Series oscilloscopes are very

stable ove procedure in this chapter, verify that the oscilloscope does not meet speciﬁcations. Refer to the Performance Veriﬁcation section to verify the speciﬁcations.

r time and should not require routine updates. Before performing any

Require

dEquipment

The equipment described in the following table, or a suitable equivalent, is required to complete the procedure.

Table 1

Descri

DC Vol

Level Generator

50Ω BNC Cable BNC male to BNC male, » 1 m (36 in) long

50Ω BNC Cable (two) BNC male to BNC male, » 25 cm (10 in) long

50Ω Feedthrough Te

Du Adapter

BNC T One male and two female BNC connectors

2: Required equipment

ption

tage Source

ed Sine Wave

rmination

al Banana to BNC

m requirements

Minimu

o 20 V, ±0.1% accuracy

-20 V t

and 200 MHz, ±0.6% amplitude accuracy

60 kHz

BNC male and female connectors

nana plugs to BNC female

Exampl

9100 Universal Calibration System

Fluke with Oscilloscope Calibration Module (Option 250)

e 5500A Multi-product Calibrator with

Fluk Oscilloscope Calibration Option (Option 5500A-SC)

Tektronix part number 012-0482-00

Tektronix part number 012-0208-00

Tektronix part number 011-0049-01

Tektronix part number 103-0090-00

ektronix part number 103-0030-00

TPS2000B Series Digital Storage Oscilloscopes Service Manual 33

Adjustment Procedures

Adjustment Procedure

The adjustment procedure consists of multiple steps for the two-channel oscilloscope, and additional steps for the four-channel model. Each step requires an external voltage source for new calibration constants.

Before performing the adjustment procedure, you must warm up the oscilloscope for at least ten minutes in an ambient temperature between 20 °C and 30 °C. Adjustments performed before warm-up or outside this temperature range may result in p

If all steps in the procedures are completed successfully, a "Pass" message is displaye procedure is aborted and the current calibration is not affected. You can choose to abort the procedures at any step by selecting FCAL ABORT without affecting the current calibration.

NOTE. While performing the adjustment procedure, keep in mind that some of the

steps take a signiﬁcant amount of time (up to 5 minutes) to complete.

oor performance.

d and the new calibration constants take effect. If any step fails, the

Enable the Service Menu

You must enable the Service menu to perform the adjustment procedure.

1. Power on the oscilloscope.

2. Push the front-panel MEASURE button to access the MEASURE menu.

3. Push the top option button to access the Measure 1 menu.

4. Push and hold the front-panel SINGLE SEQ button.

5. Pus

6. Wait at least two seconds.

7. Release the SINGLE SEQ button.

8. Release the AUTOSET button. A message appears in the lower left corner of

9. Push the front-panel UTILITY button. The last item in the Utility menu

You may now begin executing the sequence of calibration steps required by your oscilloscope and shown in the following procedure. After the adjustment is complete, disable the Service menu by pushing the UTILITY front-panel button, and the Service and Service Mode Off option buttons.

h and hold the front-panel AUTOSET button.

the screen stating "Service mode ON."

is now Service.

34 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Adjustment Procedures

Setups Required to

Complete the A

djustment

Procedure

The following ﬁ procedure.

gure shows the setups required to complete the adjustment

Figure 2: Adjustment setups

TPS2000B Series Digital Storage Oscilloscopes Service Manual 35

Adjustment Procedures

Adjustment Procedure

Use this proced

ure to load new calibration constants:

1. Enable the Service menu. (See page 34, Enable the Service Menu.)

2. Push the Service option button.

3. Push the Factory Cal option button.

4. Push the Warmup Timer option button.

5. Push the Start Timer option button to ensure a 10-minute warm up. After

10 minutes passes, the oscilloscope displays a large black or green cross.

6. Press the front-panel UTILITY button and push the Service option button.

7. Push the Factory Cal option button.

8. Push the F

CAL INIT option button to initiate the factory calibration routine.

You are now in step 1 of the procedure.

9. As indic

ated by Step 1 in the following table, connect a 0.0 V

source to

the channel inputs.

10. Press F

CAL STEP to load the calibration constant for step 1.

11. Follow the screen prompts and the table for the remainder of the routine,

ing the proper signal for each step.

apply

NOTE. During some steps, the oscilloscope may appear to be idle for several

minutes while it is processing information internally. You must wait for the screen prompt to continue.

NOTE. In the following table, "BWL" stands for the bandwidth limit of the

particular oscilloscope. The TPS2012B and TPS2014B models have a bandwidth limit of 100 MHz. The TPS2024B has a bandwidth limit of 200 MHz.

If the instrument fails any step in the procedure, the procedure terminates. Failure will result if an incorrect signal source is connected. If this happens, you must start the procedure over from the beginning.

If the instrument completes the procedure successfully, a "Pass" message is displayed and the new adjustment takes effect.

12. Compensate the signal path by performing the self-calibration routine. Disconnect any probes or cables from the channel input connectors and then press the UTILITY button. Select Do Self Cal to conﬁrm that you are ready to proceed.

13. Disable the Service menu option by pushing the UTILITY front-panel button, and the Service and Service Mode Off option buttons.

36 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Adjustment Procedures

The following t

able lists the steps in the procedure and the signal requirements.

Table 13: Adjustments (steps 73-108 are for 4-CH models only)

Procedure steps Signal Signal source setting Input

Refer to the DC voltage setup 1 diagram (See page 35, Setups Required to Complete

the Adjustment Procedure.)

DC Voltage 1

0.0 V

-20.0 V

-2.0 V

-1.6 V

-1.2 V

-0.8 V

-0.4 V

-0.32 V

-0.2 V

-0.16 V

-0.08 V

-0.04 V

-0.03 V

-0.02 V

-0.015 V

0.015 V

0.02 V

0.03 V

0.04 V

0.08 V

0.16 V

0.2 V

0.32 V

0.4 V

0.8 V

1.2 V

1.6 V

2.0 V

20.0 V

0.0 V

CH1 through CHx

TPS2000B Series Digital Storage Oscilloscopes Service Manual 37

Adjustment Procedures

Table 13: Adjustments (steps 73-108 are for 4-CH models only) (cont.)

Procedure steps Signal Signal source setting Input

Refer to the DC voltage setup 2 diagram (See page 35, Setups Required to Complete

the Adjustment Procedure.)

DC Voltage 2

-25.0 V

-12.5 V

-2.5 V

2.5 V

12.5 V

25 V

Refer to the Sine Wave Generator setup diagram. BW refers to the maximum bandwidth of the oscilloscope. (See page 35, Setups Required to Complete the Adjustment Procedure.)

Sine Wave Generator, 50 Ω

5kHz,1V

p-p

1 MHz, 100 mV

1MHz,1V

p-p

50 kHz, 1.2 V

20 MHz, 1.2 V

BWL, 30 mV

BWL, 60 mV

p-p

BWL, 120 mV

BWL, 300 mV

BWL, 600 mV

BWL, 1.2 V

5kHz,2.5V

1MHz,2.5V

p-p

50 kHz, 2.5 V

20 MHz, 2.5 V

BWL, 2.5 V

BWL, 5 V

BWL, 1.6 V

p-p

Refer to the Edge setup diagram. (See page 35, Setups Required to Complete the Adjustment Procedure.)

Edge, 50 Ω 1 kHz, 0 to -800 mV, fast

rising edge

EXT TRIG

CH1

38 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Adjustment Procedures

Table 13: Adjustments (steps 73-108 are for 4-CH models only) (cont.)

Procedure steps Signal Signal source setting Input

Refer to the Sine Wave Generator setup diagram. (See page 35, Setups Required to

Complete the Adjustment Procedure.)

Sine Wave Generator, 50 Ω

5kHz,1V

p-p

1 MHz, 100 mV

1MHz,1V

p-p

50 kHz, 1.2 V

20 MHz, 1.2 V

BWL, 30 mV

BWL, 60 mV

p-p

BWL, 120 mV

BWL, 300 mV

BWL, 600 mV

BWL, 1.2 V

5kHz,2.5V

1MHz,2.5V

p-p

50 kHz, 2.5 V

20 MHz, 2.5 V

BWL, 2.5 V

BWL, 5 V

5kHz,1V

p-p

1 MHz, 100 mV

1MHz,1V

p-p

50 kHz, 1.2 V

20 MHz, 1.2 V

BWL, 30 mV

BWL, 60 mV

p-p

BWL, 120 mV

BWL, 300 mV

BWL, 600 mV

BWL, 1.2 V

5kHz,2.5V

1MHz,2.5V

p-p

50 kHz, 2.5 V

20 MHz, 2.5 V

BWL, 2.5 V

BWL, 5 V

BWL, 1.6 V

p-p

CH2

p-p

CH3

p-p

TPS2000B Series Digital Storage Oscilloscopes Service Manual 39

Adjustment Procedures

Table 13: Adjustments (steps 73-108 are for 4-CH models only) (cont.)

Procedure steps Signal Signal source setting Input

Refer to the Edge setup diagram. (See page 35, Setups Required to Complete the

Adjustment Procedure.)

Refer to the Sine Wave setup diagram. (See page 35, Setups Required to Complete the Adjustment Procedure.)

100

101

102

103

104

105

106

107

108

Edge, 50 Ω 1 kHz, 0 to -800 mV, fast

rising edge

Sine Wave Generator, 50 Ω

5kHz,1V

p-p

1 MHz, 100 mV

1MHz,1V

p-p

50 kHz, 1.2 V

20 MHz, 1.2 V

BWL, 30 mV

BWL, 60 mV

p-p

BWL, 120 mV

BWL, 300 mV

BWL, 600 mV

BWL, 1.2 V

5kHz,2.5V

1MHz,2.5V

p-p

50 kHz, 2.5 V

20 MHz, 2.5 V

BWL, 2.5 V

BWL, 5 V

p-p

CH4

40 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

This section contains the following information that is needed to perform periodic and corrective maintenance on TPS2000B Series oscilloscopes:

Preparation tells you how to get ready to do oscilloscope maintenance.

Preventing ESD provides general information o n preventing damage to

internal modules when doing maintenance .

Inspection and Cleaning provides procedures for inspecting the oscilloscope and cleaning its external and internal modules.

Removal and Installation Procedures provides procedures for the removal and installation of modules.

Troubleshooting provides information for isolating failed modules.

Preparation

Preventing ESD

Repacka

storage.

Only qualiﬁed personnel should perform service procedures. Read the Service Safety Summary and the General Safety Summary sections of this manual before performing any service procedures. Also refer to the Operating Information section and your oscilloscope user manual for information about using the oscilloscope.

When performing any service that requires internal access to the oscilloscope,

here to the following precautions. These precautions will help you avoid

ad damaging internal modules and their components due to electrostatic discharge (ESD).

CAUTION. Static discharge can damage any semiconductor component in this

oscilloscope.

ging Instructions provides packaging information for shipment or

Minimize handling o f static-sensitive modules.

Transport and store static-sensitive modules in their static-protected containers or on a m etal rail. Label any package that contains static-sensitive modules.

Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 41

Maintenance

Inspection and Cleaning

This sect oscilloscope. Inspection and cleaning are done as preventive maintenance which, when done regularly, may prevent malfunctions and enhance reliability.

Preventive maintenance consists of visually inspecting and cleaning the oscilloscope, and using general care when operating it. Perform preventive maintenance more often if you operate the oscilloscope in a severe environment. A good time to perform preventive maintenance is just before adjustment of the oscilloscope.

Service static anything capable of generating or holding a static charge on the workstation surface.

Handle circuit boards by the edges when possible.

Do not slide

Avoid handling modules in areas that have a ﬂoor or work-surface covering capable of g

ion tells how to inspect for dirt and damage, and how to clean the

-sensitive modules only at static-free workstations. Do not allow

the modules over any surface.

enerating a static charge.

al Care

Gener

Inspection and Cleaning

Procedures

For best performance, follow these recommendations:

Protect the oscilloscope from adverse weather conditions. The oscilloscope is not waterproof.

Do not store or leave the oscilloscope where the liquid crystal display (LCD) is exposed to direct sunlight or high humidity for long periods of time.

The front and rear cases help keep dust out of the oscilloscope and must be in place during normal operation.

To avoid damage to the oscilloscope or probes, do not expose them to any sprays, liquids, or solvents.

The accumulation of dirt on internal components can cause them to overheat and fail. Dirt also provides an electrical conduction path that could cause an oscilloscope failure, especially under high-humidity conditions. Inspect and clean the oscilloscope and probes as often as operating conditions require.

Inspection, exterior. Inspect the outside of the oscilloscope for damage, wear, and missing parts. Oscilloscopes that appear to have been dropped or otherwise abused should be checked thoroughly to verify correct operation and performance. Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope.

42 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

Cleaning proce

dure, exterior. To clean the oscilloscope exterior and probes:

1. Remove loose dust on the outside of the oscilloscope and probes with a lint-free clo

th. Use care to avoid scratching the clear glass display shield.

2. Use a soft cloth dampened with water to clean the oscilloscope, or use a 75% isopropyl a

lcohol solution for more efﬁcient cleaning.

CAUTION. To prevent getting moisture inside the oscilloscope during external

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

To avoid damage to the surface of the oscilloscope or probes, do not use any abrasive or chemical cleaning agents.

Inspection, interior. Inspect and clean the interior if it appears that the oscilloscope mayhavebeendamagedorexposedtoanunusuallydirtyenvironment.

To inspect and clean the interior, disassemble the oscilloscope by completing each of the disassembly procedures in the order given. (See page 45, Removal and Installation Procedures.)

Inspect the internal portions of the oscilloscope for damage and wear using the following table as a guide. Repair defects immediately.

14: Internal inspection checklist

Table

Item Inspect for Repair action

Front and Rear Case Cracks or deformations.

Scratched lettering or

play ﬁlter. Loose

dis connectors or labels.

se, broken, or corroded

Circuit boards

Solder connections Cold solder or rosin j oints.

iring and cables

Loo solder connections. Burned circuit boards.

rned, broken, or cracked

Bu circuit-run plating.

oose plugs or connectors.

L Burned, broken, or frayed wiring.

Repair or replace defective hardware.

Remove failed module and replace with a new module.

solder joint and clean with

Re isopropyl alcohol.

irmly seat connectors.

F Repair or r eplace modules with defective wires or

ables.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 43

Maintenance

Cleaning proce

following steps:

1. Blow off dust w

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

alcohol (75 deionized water. A cotton-tipped applicator is useful for cleaning in narrow spaces and on circuit boards.

NOTE. If, after performing steps 1 and 2, a module is clean upon inspection,

skip steps 3 and 4. Proceed with step 5.

If steps 1 and 2 do not remove all of the dust or dirt, all modules in the oscilloscope except the Display Module and Front Panel Module may be spray washed using a solution of 75% isopropyl alcohol.

Extensive c leaning of the Display M odule is difﬁcult because water must not be trapped between the display shield and the display. The polarizers integrated

e display degrade with long-term exposure to water. The display shield

into th and display must be replaced as an assembly if signiﬁcant moisture or debris becomes trapped inside. Cotton tipped applicators and lint-free rags moistened in isopropyl alcohol and/or deionized water offer the best cleaning with the least opportunity for d amage to the assembly.

dure, interior. To clean the oscilloscope interior, perform the

ith dry, low-pressure, deionized air (approximately 9 psi).

% solution) and wipe with a lint-free cloth dampened with warm

The Front Panel Module can be damaged by deposition of ﬁlm or debris inside the knob encoders. To avoid this, care must be taken to not drip liquid or blow debris into the encoders.

Proceed with step 3.

3. Spray wash dirty parts with the 75% isopropyl alcohol solution and wait 60 seconds for the majority of the alcohol to evaporate.

4. Use hot (49 °C to 60 °C / 120 °F to 140 °F) deionized water to thoroughly rinse the parts.

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

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

low-temperature (52 °C to 66 °C / 125 °F to 150 °F) circulating air.

Lubrication. Periodic lubrication is not required for the oscilloscope.

44 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Removal and Installation Procedures

This section describes how to remove and install the m ajor mechanical and electrical modules of the oscilloscope.

Preparation

WAR N ING. Only qualiﬁed personnel should perform service procedures. Before

doing this o Summary and Service Safety Summary found at the beginning of this manual.

r any other procedure in this manual, read the General Safety

Maintenance

Required Tools

Always dis oscilloscope.

To preven Preventing ESD.)

The expl assembled. (See Figure 16.)

The Rep Replaceable Parts.)

If you Cleaning for cleaning instructions. (See page 42.)

Use the following tools to remove and replace modules in the oscilloscope:

Torque-limiting screwdriver, long shank, 8 in-lb (.85 N·m) range with Torx® T-15 tip

Torque-limiting screwdriver with To rx® T-8 tip

16 mm (5/8 inch) deep socket with wide center hole (S·K Hand Tool Corp., S-K #40820, or equivalent)

connect the power cord before disassembling any part of the

t damage to electrical components, read Preventing ESD. (See page 41,

oded view diagram gives an overview of how the entire oscilloscope is

laceable Parts section lists all of the replaceable modules. (See page 73,

are disassembling the oscilloscope for cleaning, refer to Inspection and

Torque wrench to 40 in-lb (4.5 N·m)

Screwdriver with 1/4 inch (6.35 mm) ﬂat blade

Pliers (all-purpose and needle-nose)

TPS2000B Series Digital Storage Oscilloscopes Service Manual 45

Maintenance

Replacement Procedures

Disassembly fo

r replacement is best achieved by removing and replacing the

modules in the speciﬁed order.

To remove and replace the rear case, fan, Display Adapter board, IO board, or Acquisition board, refer to the following table:

Procedures for removing rear case and associated m odules

Remove module Prerequisite Procedure location

Rear case

Fan

IO board Remove rear case ﬁrst. (See page 50.)

Acquisition board

Display Adapter board

To remo

ve and replace the front case, Front Panel board, LCD display, Compact

Remove rear case ﬁrst. (See page 49.)

Remove rear case and IO board ﬁrst.

Remove rear case, fan, Acquisition board, and Display module ﬁrst.

(See page 47.)

(See page 51.)

(See page 52.)

Flash module, or keypad, refer to the following table.

Procedures for removing front case and associated modules

Remove module Prerequisite Procedure location

Front case

Front panel board

Keypad

Display module

Compact ﬂash module Remove front case and

Remove front case ﬁrst. (See page 56.)

Remove front case ﬁrst. (See page 58.)

Remove front case, Front Panel board, and Acquisition board ﬁrst.

Acquisition board ﬁrst.

(See page 54.)

(See page 57.)

(See page 58.)

46 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

Rear Case

You will need a t

Removal. To remove the rear case, follow these steps. (See Figure 3.)

1. Open the battery door and remove the batteries.

2. Place the osc

3. Remove the two small ESD protective covers (rubber plugs) from the bottom

left and rig

4. Remove the ﬁve screws that secure the rear case to the chassis. Tilt the handle to gain acc

5. Lift up and remove the rear case from the oscilloscope chassis.

Installation. Follow these procedure to reinstall the rear case. (See Figure 3.)

1. Place th

2. Ensure that all cables are routed within the internal chassis area.

3. Place the rear case over the assembled oscilloscope and ensure that:

All edges align with the chassis.

The RS-232, printer, and power connectors align and feed through the

rear case without binding.

orque-limiting Torx T-15 screwdriver for this procedure.

illoscope face down o n a soft surface, such as an antistatic mat.

ht sides of the rear case.

esstothetoptwoscrews.

e oscilloscope face down on a soft surface.

4. Install the ﬁve screws to attach the rear case. Tilt the handle to access the top two holes.

5. Install the two small ESD protective covers (rubber plugs) on top of the two screws at the bottom left and right of the rear panel.

6. Install the batteries.

CAUTION. Avoid cross threading the screws that attach the rear case to the front

case. An easy way to avoid this is to slip the screw into the hole and, using slight pressure, slowly rotate the screw counterclockwise until you feel the screw slip

nto the screw threads. Then tighten the screw clockwise. A properly started screw

i will give very little resistance going in.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 47

Maintenance

Figure 3: Removing and installing the rear case

48 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

Fan

Youwillneedth

Removal. To remove the fan, follow these steps. (See Figure 4 on page 50.)

1. Remove the rea r case. (See page 47, Rear Case.)

2. Disconnect t

3. Remove the four screws (with washers) and the four standoffs that attach

the fan to th installing the new fan.

4. Remove the

Installation. To install a new fan, follow these steps. (See Figure 4.)

1. Align the fan bracket with the fan. Align the fan so that air blows out the side of the chassis, not into the chassis.

2. Install the four standoffs, four ﬂat washers, four spring washers, and four screws to attach the fan to the chassis.

3. Install the fan cable on the I/O board.

4. Insta

ll the rear case.

e T15 screwdriver for this procedure.

he fan cable from the IO board.

e chassis. Keep the screws, washers, and standoffs to use when

fan.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 49

Maintenance

I/O Board

Removal. To r em

1. Remove the rear case. (See page 47, Rear Case.)

2. Disconnect all cables from the I/O board. Note the cable connections so that

you can reinstall them.

3. Remove the three chassis mounting screws from the I/O board.

4. Unseat the I/O board from its connector on the Acquisition board and lift

up to remove the I/O board.

Installat

1. Align the connector on the bottom of the I/O board with the connector on the

2. Install the three I/O board mounting screws to attach the board to the support

3. Connect all cables to the I/O board as noted in step 2 of the Removal

4. Install the rear case.

ion. To install the I/O board, follow these steps. (See Figure 4.)

Acquisit

bracket

proced

ove the I/O board, follow these steps. (See Figure 4 on page 50.)

ion board. Press down to seat the connector.

ure.

Figure 4: Modules accessed from the rear of the oscilloscope

50 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

Acquisition Board

You will need a t screwdriver, and a 16 mm (5/8 inch) deep socket for this procedure.

CAUTION. The Acquisition board is particularly sensitive to ESD. Read the

Preventing ESD section before removing or installing the Acquisition board. (See page 41, Preventing ESD.)

Removal. To remove the Acquisition board, follow these steps. (See Figure 5 on page 52.)

1. Remove the rea r case. (See page 47, Rear Case.)

2. RemovetheBNCcoverbypryingupontheexposededge. (SeeFigure5

on page 52.)

3. Use the 16 mm (5/8 inch) deep socket to remove the nuts from the BNC connectors.

4. Remove the plastic BNC shells from the BNC connectors. Hold the BNC shell with your ﬁngers and pull up to remove the shell.

5. Remove the I/O board. (See page 50, I/O Board.)

6. Note how the Display cable at J201 i

Acquisition b oard so that you can reinstall it the same way ).

orque-limiting Torx T-15 long-shank screwdriver, a ﬂat-blade

s routed under the corner of the

7. Disconnect the Display cable from J201 (leave the other e nd connected to J401 on the Display Adapter board).

8. Remove the seven screws that attach the Acquisition board to the chassis.

9. Use the ﬂat-blade screwdriver to pull up on the edge of the board and unseat

the connection between the Acquisition board and the Compact Flash board.

10. Lift up and remove the Acquisition board.

Installation. To install the Acquisition board, follow these steps. (See Figure 5 on page 52.)

1. Position the Acquisition board over the chassis and align the feedthrough connector on the front-panel and compact ﬂash boards.

2. Push down to seat the connector.

3. Route the Display cable under the corner of the Acquisition board.

4. Install the seven s crews that attach the Acquisition board to the chassis.

5. Connect the Display cable at J201 (the other end is connected to J401 on

the Display Adapter board).

6. Install the I/O board. (See page 50, I/O Board.)

7. Install the plastic BNC shells on the BNC connectors.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 51

Maintenance

8. Use the 16 mm (5/ connectors. Torque the nuts to 40 in-lbs using the torque wrench.

9. Install the BN

10. Install the rear case.

11. Install the front-panel knobs.

8 inch) deep socket and install the BNC nuts on the BNC

C cover on the front case.

Figure 5: Using a screwdriver to remove the Acquisition board

Display Ada pter Board

52 TPS2000B Series Digital Storage Oscilloscopes Service Manual

You will need T15 screwdriver for this procedure.

Removal. To remove the Display Adapter board, follow these steps.

Maintenance

1. Refer to the exp

loded view and the rear-panel locator diagram. (See Figure 4

on page 50.) (See Figure 16 on page 78.)

2. Remove the rea

r case and fan. (See page 47, Rear Case.) (See page 49, Fan.)

3. Remove the Acquisition board. (See page 51, Acquisition Board.)

4. Remove the Display module. (See page 57, Display Module.)

5. Disconnect all cables except the LCD data cable from the Display Adapter

board, noting the connections so that you can reconnect the cables during installation.

6. Disconnect the LCD data cable from the Display module and pass enough cable through the hole in the chassis so that you will be able to lift the Display Adapter b

oard off the chassis with this cable still connected.

7. Remove the four screws that attach the Display Adapter board to the chassis and lift

the board off the chassis enough to access the LCD data cable connector. Disconnect this cable and remove the Display Adapter board from the instrument.

Installation. To install the Display Adapter board, follow these steps. (See Figure 4.)

1. Connect the four cables to the Display Adapter board as noted in step 5 in emoval procedure, as follows:

the R

Cable From To

LCD backlight cable

LCD data cable 174-5861-00

Display cable 174-5897-00 Acquisition board

Display Adapter power supply cable 174-4949-01

Display module Display Adapter board J202

Display module Display Adapter board J302

Display Adapter board J401

J201

I/O board J600

Display Adapter board J201

2. Route the LCD data cable through the slot in the chassis to where it will

connect to the Display module.

3. Align the Display Adapter board with the mounting holes in the chassis.

4. Install the four screws that attach the Display Adapter board to the chassis.

5. Connect the other end of the LCD data cable to the Display module.

6. Install all of the modules that were removed.

7. Install the front case and the rear case.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 53

Maintenance

Front-Panel Knob

Front Case

Remove each fro the front panel. If necessary, insert a screwdriver between the front panel and knob and lift up.

Install the front-panel knobs by aligning the keyed knob with the shaft, and press the knob on the shaft.

You will need a torque-limiting Torx T-15 screwdriver and 16 mm (5/8 inch) deep socket for this procedure.

Removal. To remove the front case, follow these steps. (See Figure 7 on page 55.)

1. Remove the front-panel knobs. (See page 54, Front-Panel Knob.)

2. Place the oscilloscope with its rear case down on a soft surface, such as an

antistatic mat.

3. RemovetheBNCcoverbypryingupontheexposededge.

4. Use the 16 mm (5/8 inch) deep socket to remove the nuts from the BNC

connectors.

5. Remove the plastic BNC shells from the BNC connectors. Hold the BNC shell with your ﬁngers and pull up to remove the shell. (See Figure 6.)

nt-panel knob by ﬁrmly grasping the knob and pulling it off of

Figure 6: Removing the BNC cover, shell, and retaining nuts

6. Follow the procedure to remove the rear case. (See page 47, Rear Case.)

7. Remove the four screws from the internal chassis that attach the chassis to the

front cover. (See Figure 7.)

8. Lift the chassis off of the front case.

Installation. To install the front case, follow these steps. (See Figure 7.)

1. Place the front case face down on a soft surface.

2. Verify that the switch keypad is aligned and feeds through the front case.

Follow the keypad installation procedure. (See page 59, Installation.)

3. Align the power switch, BNC connectors, and knob shafts so they feed through the front case.

54 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

4. Lower the chass

5. Installthefourscrewsontheinsideofthechassisthatattachthechassistothe

front cover. (

6. Follow the procedure to install the rear case. (See page 47, Installation.)

7. Install the plastic BNC shells on the BNC connectors.

8. Use the 16 mm (5/16 inch) deep socket and install the BNC nuts on the BNC

connectors. Torque the nuts to 40 in-lbs using the torque wrench.

9. Install the BNC cover and front-panel knobs.

is onto the front case.

SeeFigure7.)

Figure 7: R emoving the front case

TPS2000B Series Digital Storage Oscilloscopes Service Manual 55

Maintenance

Front-Panel Board

You will need a t

Removal. To remove the Front-Panel board, follow these steps. (See Figure 8.)

1. Remove the front case. (See page 54, Front Case.)

2. Remove the ﬁv

3. Pull out to remove the Front-Panel board from the chassis. (This will

unseat the f Acquisition board on the opposite side.

orque-limiting Torx T-15 screwdriver for this procedure.

e screws that attach the Front-Panel board to the chassis.

eedthrough connection between the Front-Panel board and the

Figure 8: Removing the Front-Panel module

allation. To install the Front-Panel module, follow these steps. (See Figure 8.)

Inst

1. Align the Front-Panel board over the front chassis and reseat the feed-through

nection b etween the Front-Panel board and the Acquisition board on the

con opposite side.

stall the ﬁve screws to attach the Front-Panel board to the chassis.

2. In

3. Install the front case.

56 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

Display Module

You will need a t

Removal. To remove the Display module, follow these steps. (See Figure 9.)

1. Remove the front case. (See page 54, Front Case.)

2. Remove the fr

3. Remove the I/O board. (See page 50, I/O Board.)

4. Remove the Acquisition board. (See page 51, Acquisition Board.)

5. Disconnect the LCD backlight cable from J202 on the Display Adapter board.

(SeeFigure4onpage50.)

6. Remove the four screws that attach the Display module to the chassis. Support the display with your hand.

7. Remove the copper tape and disconnect the LCD data cable from the Display module (leave the other end connected to J302 on the Display Adapter board). (See Figure 9.)

CAUTIO

the shield will destroy the attaching gasket.

N. Do not separate the display shield from the Display module. Removing

orque-limiting Torx T-8 screwdriver and pliers for this procedure.

ont panel board. (See page 56, Front-Panel Board.)

Figure 9: Removing the Display module

Installation. To install the Display module, follow these steps. (See Figure 9.)

TPS2000B Series Digital Storage Oscilloscopes Service Manual 57

Maintenance

Compact Flash Board

1. Connect the LCD chassis, from the Display Adapter board J302).

2. Align the Display module with the mounting tabs on the front of the chassis.

3. Install the four screws that attach the Display module to the chassis.

4. Reposition the copper tape to cover the LCD data cable.

5. Connect the LCD backlight cable, through the slot in the chassis, to the

Display Adapter board J202.

6. Install the Acquisition and I/O boards.

7. Install the Front-Panel board.

8. Install the front case.

You will need a torque-limiting Torx T-15 screwdriver for this procedure.

Removal. To remove the Compact Flash board, perform the follow these steps. (See Figure 7 on page 55.)

1. Remove the Acquisition board. (See page 51, Acquisition Board.)

2. Remove the two screws below the I/O board mounting bracket that attach the

Compact Flash board to the internal chassis. (See Figure 4 on page 50.)

data cable to the display (it routes through the slot in the

Keypad

3. Remove the single screw below the Display module that attaches the Compact Flash board to the external chassis.

4. Remove the Compact Flash board.

Installation. To install a new Compact Flash board, follow these steps:

1. Align the Compact Flash board with the mounting bracket on the front of the chassis and the mounting posts on the inside of the chassis.

2. Install the screws the attach the compact board to the chassis.

3. Reinstall the Acquisition board.

You will need a torque-limiting Torx T-15 screwdriver and 16 mm (5/8 inch) deep socket for this procedure.

Removal. To remove the switch keypad, follow these steps . (See Figure 10.)

1. Remove the front case. (See Figure 7.)

2. Lift the keypad out of the front case.

CAUTION. Keep the electrical contacts on the back of the keypad clean. Skin oils

and dust will inhibit good electrical contact.

58 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

Figure 1

Installation. To install the switch keypad, follow these steps. (See Figure 10.)

1. Place the front case face down on a soft surface.

2. Align the switch keypad into the front case using the guide posts and the

CAUTION. Keep the electrical contacts on the back of the switch pad clean. Skin

oils and dust will inhibit good electrical contact.

3. Verify that all buttons are properly seated into place before proceeding.

4. Place the entire internal assembly into the front case.

0: Removing and installing the keypad

holes in the keypad.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 59

Maintenance

Troubleshooting

This section contains information and procedures to help you isolate a defective module in the oscilloscope.

WARNING. Before you perform this or any other procedure in this manual,

read the General Safety Summary and Service Safety Summary found at the beginning o components, read Preventing ESD. (See page 41.)

f this manual. Also, to prevent possible injury or damage to electrical

Adjustment After Repair

Required Tools and

Equipment

If you replace the acquisition circuit board, you must adjust the oscilloscope after repair. Refer to the Adjustment Procedures.(Seepage33.)

You ma y n

Tools and equipment Example

Oscilloscope with probes Tektronix TDS1000 Series or TDS2000

DMM 3.5 or greater digit DMM

eed the following tools and equipment to troubleshoot the oscilloscope:

Series with probes

60 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

Troubleshooting Tree

To isolate a pro troubleshooting tree in the following four ﬁgures.

blem to a speciﬁc troubleshooting procedure, use the

Figure 11: Oscilloscope troubleshooting tree (page 1 of 4)

TPS2000B Series Digital Storage Oscilloscopes Service Manual 61

Maintenance

Figure 12: Oscilloscope troubleshooting tree (page 2 of 4)

62 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

re 13: Oscilloscope troubleshooting tree (page 3 of 4)

Figu

TPS2000B Series Digital Storage Oscilloscopes Service Manual 63

Maintenance

Figure 14: Oscilloscope troubleshooting tree (page 4 of 4)

64 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

PROBECOMPOutput

Using the Error Log

When the oscill

oscope is on and operating properly, the PROBE COMP output should generate a square wave, approximately 5 V in amplitude, at a 1 kHz frequency. Use the oscilloscope and the 10X probe to probe this output.

As shown in the following table, there are two cases of d efects. Either the 1 kHz signal is on and the I/O and Acquisition boards are both active and functionally capable of performing an acquisition, or one of those two modules is not performing correctly. While many different possible frequencies exist, all involve detected failures on the Acquisition or I/O boards due to failure.

Signal at PROBE COMP Possible problem

1 kHz signal, no display Troubleshoot the display

Signal other than 1 kHz

No signal Troubleshoot the power supply

Troubleshoot the Acquisition board

Accessing the error log. Failures that occur during the p ower-up diagnostics or normal oscilloscope operation place an entry in the error log.

The error log list can be accessed any time by pushing the UTILITY button and selecting Options > Error Log. The following table lists the error codes.

Table 15: List of error codes

No. ID Description Probable cause

0 Battery Battery 1 alarm

1 Batt

2 Batt

3 Bat

0 Diagnostics Diagnostics internal error

4 Diagnostics

12 Diagnostics

13 Diagnostics

14 Diagnostics

255

ery

tery

Diagnostics

Software Software defect Contact Tektronix.

ery 2 alarm

Batt

PIC Communication

PIC HW Failure

1 diagnostics failed

2 diagnostics failed

DG421 diagnostics failed

H3 diagnostics failed

CH4 diagnostics failed

ADG421 #2 diagnostics failed

Battery hardware failure; replace

ery. If errors persist, contact

batt Tektronix.

ccur sporadically during

May o normal operation. If errors occur repeatedly, a hardware failure may

st. Contact Tektronix.

exi

tact Tektronix.

Con

Acquisition board or power supply

ilure.

Acquisition board or power supply

ilure.

Acquisition board or power supply

ailure.

Acquisition board or power supply

ailure

Acquisition board or power supply failure.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 65

Maintenance

Clearing the Er

steps:

1. Enable the Ser

2. Push the UTILITY button and push the Service option button to display

the Service

3. Push the Service Diag. option button to display the Diagnostics menu.

4. Push the Clear Error Log option button to clear the error log of past failures.

This also sets the Power Cycle count to zero.

Lithium-Ion Battery Maintenance

Lithium-Ion rechargeable batteries require routine maintenance and care in their

andling. Read and follow the informationinthisdocumenttosafelyuse

s and charge or dispose of the battery as appropriate.

Key Information

use and h Lithium-Ion batteries and achieve the maximum battery life span.

Use only Tektronix-approved batteries in your Tektronix products.

Do not leave batteries unused for extended periods of time, either in the product or in storage. When a battery has not been used for six months, check the charge statu

ror Log. To clear the error log after ﬁxing a problem, follow these

vice menus. (See page 34, Enable the Service Menu.)

menu.

The typical estimated life of a Lithium-Ion battery is about two to three years or

oximately 300 charge cycles, whichever occurs ﬁrst. One charge cycle is a

appr period of use from fully charged, to fully discharged, and fully recharged again. Use a two to three year life expectancy for batteries that do not run through complete charge cycles.

Rechargeable Lithium-Ion batteries have a limited life and will gradually lose their capacity to hold a charge. This loss of capacity (aging) is irreversible. As the battery loses capacity, the length of time it will power the product (run time) decreases.

Lithium-Ion b atteries continue to slowly discharge (self-discharge) when not in use or while in storage. Routinely check the battery charge status. Check the latest TPS2000B user manual for information on how to check battery status and for battery charging instructions. The latest TPS2000B manuals are available at www.tektronix.com/manuals.

66 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Maintenance

Battery Maintenance

Charging

Pay attention t

Observe and note the run time that a new fully charged battery provides for powering your run times for older batteries. The run time of your battery will vary depending on the product conﬁguration and the applications that you run.

Routinely check the battery charge status.

Carefully m

Consider replacing the battery with a new one if you note either of the following

Always follow the charging instructions provided with your product. Refer to your product user manual and/or online help for detailed information about charging its battery. The latest version of your Tektronix product user manual is available at www.tektronix.com.

NOTE.

one battery pack should be installed. You need to test one battery pack and one battery slot at a time.

When you troubleshoot battery issues for dual-battery conﬁgurations, only

o these points when monitoring Lithium-Ion batteries:

product. Use this new battery run time as a basis to compare

onitor batteries that are approaching the end of their estimated life.

conditions:

The battery run time drops below about 80% of the original run time.

The battery charge time increases signiﬁcantly.

Storage

Follow these recommendations when storing a Lithium-Ion battery:

rge or discharge the battery to approximately 50% of capacity before

Cha storage.

move the battery and store it separately from the product.

Store the battery at temperatures between 5 °C and 20 °C (41 °F and 68 °F).

Charge the battery to approximately 50% of capacity at least once every six months.

NOTE. The battery self-discharges during storage. Higher temperatures (above

20 °C or 68 °F) reduce the battery storage life.

CAUTION. If a battery is stored or otherwise unused for an extended period

without following these instructions, and the battery has no charge remaining when you check it, consider it to be damaged. Do not attempt to recharge it or to use it. Replace it with a n ew battery.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 67

Maintenance

Handling Precau tions

Pay attention t

Do not disassemble, open, crush, bend, deform, puncture, or shred a battery.

Do not drop a battery or expose the battery to excessive shock or vibration.

Do not short circuit a battery or allow metallic or conductive objects to contact the battery terminals.

Do not dispose of a battery in ﬁre or water.

Do not use the battery to power any devices other than the instrument for which it was designed.

Keep the battery away from personnel that are not trained to use the instrument.

Do not expose a battery to temperatures above 60 °C (140 °F).

Keep the battery away from children.

Do not u

If a battery pack is leaking ﬂuids, do not touch any ﬂuids. Properly dispose of aleak

WARNING. Eye contact with battery ﬂuids can damage the eye. In case of eye

contact with battery ﬂuids, do not rub eyes. Immediately ﬂush eyes thoroughly with water for at least 15 minutes, lifting upper and lower lids, until no evidence of the ﬂuid remains. Seek medical attention.

o the following when handling batteries:

se a damaged battery.

ing battery pack (see Disposal and Recycling in this document).

nsportation, Disposal

Tra

and Recycling

See Environmental Considerations in the TPS2000B user manual.

68 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Repackaging Instructions

Use these procedures to repackage the oscilloscope for shipment or storage.

CAUTION. Remove rechargeable battery packs from the instrument before

shipping, and store the batteries in an approved area. Failure to do so can cause damage to the oscilloscope. (See page 66, Lithium-Ion Battery Maintenance.)

Maintenance

Packaging

To ship the instrument for repair, use the original packaging container if possible. If the container is unﬁt for use or unavailable, package the instrument as follows:

Use a corrugated cardboard shipping carton having a test strength of at least 125 kg (275 pounds).

The shipping carton should have an inside dimension at least 15.25 cm (six inches) greater than the oscilloscope dimensions.

Make sure to remove the battery before placing the oscilloscope into the shipping carton. Store the battery according to the recommendations. (See page 67, S

Make sure that the oscilloscope is adequately padded with a cushioning mater move around inside of the carton when sealed.

e oscilloscope is being shipped to a Tektronix Service Center, enclose the

If th following information:

The

Name and phone number of a contact person

Type and serial number of the oscilloscope

Reason for returning

torage.)

ial such as foam, paper, or bubble wrap. The oscilloscope should not

owner address

A complete description of the service required

Seal the shipping carton with an industrial stapler or strapping tape.

Mark the address of the Tektronix Service Center and also your own return address on the shipping carton in two prominent locations.

Storage

TPS2000B Series Digital Storage Oscilloscopes Service Manual 69

Store the oscilloscope in a clean, dry environment. The following characteristics apply to both shipping and storage (oscilloscope not operating):

NOTE. Remove the battery and store it separately from the oscilloscope. See the

battery storage recommendations. (See page 67, Storage.)

Maintenance

Temperature ra

Altitude: To 15,000 m

See Speciﬁcations for a complete list of the environmental characteristics.

nge: -20 °C to +60 °C

70 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Diagrams

This section describes the electrical operation of the TPS2000B Series oscilloscope using the major circuit blocks. The following ﬁgure shows the oscilloscope interconnections used in the four-channel version.

Figure 15: TPS2000B Series block diagram

TPS2000B Series Digital Storage Oscilloscopes Service Manual 71

Diagrams

72 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Replaceable Parts

This section contains a list of the replaceable modules for the TPS2000B Series oscilloscopes. Use this list to identify and order replacement parts.

Parts Ordering Information

Replacement parts are available through your local Tektronix ﬁeld ofﬁce or representative.

Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the beneﬁt of the latest improvements. Therefore, when ordering parts, it is important to include the followin

If you order a part that was replaced with a different or improved part, your local Tektronix ﬁeld ofﬁce or representative will contact you concerning any change in part number.

ginformationinyourorder.

Part number

Instrument type or model number

Instrument serial number

Instrument modiﬁcation number, if applicable

Module Servicing

Modules can be serviced by selecting one of the following two options. Contact your local Tektronix service center or representative for repair assistance.

Module exchange. In some cases you may exchange your module for a remanufactured module.

These modules cost signiﬁcantly less than new modules and meet the same factory speciﬁcations. For more information about the module exchange program, call

-800-833-9200 and select option 2.

New modules. You may purchase replacement modules in the same way as other replacement parts.

TPS2000B Series Digital Storage Oscilloscopes Service Manual 73

Replaceable Parts

Using the Replaceable Parts List

This section contains a list of the mechanical and electrical components that are replaceable for the oscilloscope. Use this list to identify and order replacement parts.

The following table describes each column in the parts list.

Table 16: Parts list column descriptions

Column

2 Tektronix Part

3 and 4

Column name Description

Figure & Index Number

Number

Serial Number Column three indicates the serial number at which the part

Qty T his indicates the quantity of parts used.

Name &

iption

Descr

Items in this section are referenced by ﬁgure and index numbers to the exploded view illustrations that follow.

Use this part number when ordering replacement parts from Tektronix.

was ﬁrst at which the part was discontinued. No entries indicates the part is good for all serial numbers.

An item name is separated from the description by a colon (:). B sometimes appear as incomplete. Use the U.S. F ederal Catalog handbook H6-1 for further item name identiﬁcation.

effective. Column four indicates the serial number

ecause of space limitations, an item name may

Abbreviations

Abbreviations conform to American National Standard ANSI Y1.1-1972.

74 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Replaceable Parts

Table 17: Repla

ceable parts list

Fig. & index number

16-1

-2 211-1432-00 4

-3 210-1607-00 4

-4 210-1608-00 4

-5

-6 220-0293-00 4

-7

-8 174-5861-00 1

-9 174-4949-01 1

-10 211-1272-00 23

-11 174-4904-01 1

-12

-13 174-5897-00 1

-14 202-0485-00 1

-15 367-0538-00 1

-16 348-1791-00 2

-17 200-5105-00 2

-18 348-1704-00 2

-19 200-4844-00 1

-20 348-1703-00 2

-21 146-0150-01 2

-22 200-4847-00

-23 211-1273-00 9

-24 337-4305-00 4

-25 878-0620-00 1

-26 878-0037-72 1

-27 213-1139-00 2

-2 8 211-121 6-0 0 4

-29

-30 850-0115-00 1

Tektronix part number

441-2637-00 1

441-2638-00 1

119-6965-00 1

878-0392-00 1

878-0597-00 1

878-0598-00 1

878–0444-00 1

878-0445-00 1

Serial no. effective

Serial no. discont’d Qty Name & description

CHASSIS 2 CH

CHASSIS 4 CH

SCREW, M3.0X30MM, FLAT HEAD, FAN ATTACHING

SPRING WASHER, M3, FAN ATTACHING

PLAIN WASHER, M3, FAN ATTACHING

FAN, DC, TUBEAXIAL; 12 VDC, 170 MA, 4200 RPM, 32 DBA, 19 CFM, 60 X 60 MM X 25 MM; UL, CSA, TUV, SAFETY CONTROLLED

THRU-HOLE THREAD STANDOFFS,3.5M3,LENGTH=18MM

CIRCUIT BOARD SUBASSY; DISPLAY ADAPTER BOARD

CABLE, FFC, 33 PIN, PITCH=0.5MM; DISPLAY DATA CABLE

CABLE ASSY; (UL1061), 28 AWG, v6.0 L, 1 X 5, 0.049 CTR: DISPLAY ADAPTER POWER SUPPLY CABLE

SCREW, MACHINE; 6-32 X 0.250, PNH, STL, ZNPL, T-15

ON/OFF SWITCH, CABLE ASSEMBLY

CKT BD ASSY; ACQUISITION BD, 2CH

CKT BD ASSY; ACQUISITION BD, 4CH

CA ASSY, SP; DISPLAY CABLE

ASSEMBLY, REAR CASE

HANDLE, OVERMOLDED

FOOT;REAR,BLACK,0.4X0.4X0.1(HEIGHT)

COVER, ESD PROTECTION

FOOT; REAR, SANTOPRENE, BLACK

COVER, BATTERY DOOR

FOOT; FRONT, FLIPMPC/ABS,SILVER GRAY

BATTERY, LITHIUM-ION, RECHARGEABLE, 11 V,

6.6 AH, SMBUS, RECESSED TERMINALS, UL, SAFETY CONTROLLED

COVER, ISOLATION BARRIER

EXACT DUPLICATE OF 211-1143-00 SCREW, PT; K35-1.57, PAN HEAD, STL, ZNPL, T-15

SHIELD, CHANNEL ATTENUATION

CKT BD ASSY; I/O BOARD

MODULAR ASSEMBLY; COMPACT FLASH ASSEMBLY

SCREW, TPG, TF; 2-28 X 0.188, PLASTITE, PHILLIPS, PNH, STL ZN PL

SCREW, PAN HEAD, PT, T8 (3MM X 1.34 X 4.3MM), LCD

CKT BD ASSY; FRONT PANEL BD, 2CH

CKT BD ASSY; FRONT PANEL BD, 4CH

DISPLAY, COLOR

TPS2000B Series Digital Storage Oscilloscopes Service Manual 75

Replaceable Parts

Table 17: Replaceable parts list (cont.)

Fig. & index number

-31

-32

-33 348-1525-00 2

-34 020-2917-00 1

-35 366-086

-36 366-0863-00 6

-37

-38

-39 366-0

-40

Tektronix part nu mber

260-2906-00 1

260-2907-00 1

202-0480-00 1

202-0481-00

2-00

200-5136-00 1

37-00

200-51

335-2232-00 1

335-2233-00 1

845-00

2227-00

335-

335-2228-00 1

335-2229-00 1

Serial no. effective

Serial no. discont’d Qty Name & descri

ption

SWITCH, KEYPAD; ELASTOMERIC, FRONT PANEL, TPS, 2CH COLOR

SWITCH, KEYPAD; ELASTOMERIC, FRONT PANEL, TPS, 4CH COLOR

CASE, FRONT; 2 CHANNEL, METALIZED; SAFETY CONTROLLE

CASE, FRONT; 4 CHANNEL, METALIZED; SAFETY CONTROLL

FOOT; FRONT, SANTOPRENE, BLACK, 64 DEROMETER, TEXTURED

REPLACEMENT KIT BNC SHELL

ASSEMBLY, KNOB; .470 DIAMETER

ASSEMBL

COVER; BNC DOOR, 2 CHANNEL

COVER; BNC DOOR, 4 CHANNEL

MARKER

MARKER, IDENT: 4 CH FRONT PANEL, COLOR

PUSH BUTTON; POWER, PC/ABS BAYBLEND,FR110,SILVER

MARKER, IDENT: BEZEL, TPS2012B (100MHZ)

MARK

MARKER, IDENT:BEZEL, TPS2024B (200MHZ)

Y, KNOB; .685 DIAMETER

, IDENT: 2 CH FRONT PANEL, COLOR

ER, IDENT:BEZEL, TPS2014B (100MHZ)

76 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Replaceable Parts

Table 17: Replaceable parts list (cont.)

Fig. & index number

-41

-42 200-4845-00 1

OPTIONAL ACCESSORIES

following parts are commonly ordered for use with these oscilloscopes. For a complete list of standard and optional accessories, refer to your productuser

The manual, available for download at: www.tektronix.com/manuals.

-43

-44 156-9413-00 1

Tektronix part number

335-2328-00 1

335-2329-0

335-2330-00 1

335-2331-00 1

335-2332-

335-2333-00 1

335-2334-00 1

335-2335

335-2336-00 1

335-2337-00 1

335-233

335-2339-00 1

335-2340-00 1

335-23

335-2342-00 1

335-2343-00 1

335-2

335-2345-00 1

335-2346-00 1

335-

-00

8-00

41-00

344-00

2347-00

S2PWR1

Serial no. effective

Serial no. discont’d Qty Name & descri

ption

LABEL, 2 CH LANGUAGE, FRENCH

LABEL, 2 CH LANGUAGE, ITALIAN

LABEL, 2 CH L

LABEL, 2 CH LANGUAGE, SPANISH

LABEL, 2 CH LANGUAGE, JAPANESE

LABEL, 2 CH

LABEL, 2 CH LANGUAGE, CHINESE (SIMPLIFIED)

LABEL, 2 CH LANGUAGE, CHINESE (TRADITIONAL)

LABEL, 2

LABEL, 2 CH LANGUAGE, RUSSIAN

LABEL, 4 CH LANGUAGE, FRENCH

LABEL,

LABEL, 4 CH LANGUAGE, GERMAN

LABEL, 4 CH LANGUAGE, SPANISH

LABEL

LABEL, 4 CH LANGUAGE, PORTUGUESE

LABEL, 4 CH LANGUAGE, CHINESE (SIMPLIFIED)

LABE

LABEL, 4 CH LANGUAGE, KOREAN

LABEL, 4 CH LANGUAGE, RUSSIAN

ER, FRONT PROTECTIVE

COV

WER APPLICATION SOFTWARE MODULE

IC, MEMORY; CMOS, FLASH; 32 MB OR MORE,

MORY MODULE, COMPACT FLASH, (CF), TYPE 1;

ME SDCFB16-101-00, 50 PIN MODULE 1 EA A0 CT8MBC1.MD

ANGUAGE, GERMAN

LANGUAGE, PORTUGUESE

CH LANGUAGE, KOREAN

4 CH LANGUAGE, ITALIAN

, 4 CH LANGUAGE, JAPANESE

L, 4 CH LANGUAGE, CHINESE (TRADITIONAL)

TPS2000B Series Digital Storage Oscilloscopes Service Manual 77

Replaceable Parts

Figure 16: Exploded view diagram

78 TPS2000B Series Digital Storage Oscilloscopes Service Manual

Tektronix TPS2000B Series Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual