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Service Manual
TDS3000B Series Digital Phosphor Oscilloscopes 071-0972-05
Revision B This document supports firmware version 3.00 and above for TDS3000B Series instruments only. 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.
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 supercedes 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. 14200 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA For product information, sales, service, and technical support: H In North America, call 1-800-833-9200. H Worldwide, visit www.tektronix.com to find contacts in your area.
Table of Contents
General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii xi xii xiv
Specifications
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1- 1 -
Operating Information
Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installing an Application Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installing a Communication Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front-Panel Menus and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front-Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear-Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Communication Module Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Probe Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Self Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transporting the Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 2 2- 7 2- 8 2- 9 2- 18 2- 19 2- 20 2- 21 2- 22 2- 23 -
Theory of Operation
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front-Panel Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 1 3- 2 3- 2 3- 3 3- 3 3- 3 -
Performance Verification
Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Performance Verification Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4- 2 4- 5 -
Adjustment Procedures
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview of the Adjustment Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Factory Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5- 1 5- 2 5- 3 5- 6 -
Maintenance
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preventing ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6- 1 6- 1 6- 2 -
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Table of Contents
Removal and Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unpacking and Repacking Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6- 5 6- 39 6- 40 6- 43 -
Options
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7- 1 -
Electrical Parts List
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8- 1 -
Diagrams
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9- 1 -
Mechanical Parts List
Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10- 1 10- 2 -
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Table of Contents
List of Figures
Figure 3- TDS3000B series block diagram . . . . . . . . . . . . . . . . . . . -1: Figure 6- Pulling the hub pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1: Figure 6- Releasing the hub assembly . . . . . . . . . . . . . . . . . . . . . . . -2: Figure 6- Reinstalling a hub cover . . . . . . . . . . . . . . . . . . . . . . . . . . -3: Figure 6- Communication module guide . . . . . . . . . . . . . . . . . . . . . -4: Figure 6- Main board disk drive flex cable connector J800 . . . . . -5: Figure 6- Removing the bezel from a new disk drive . . . . . . . . . . . -6: Figure 6- Rear chassis cables to the main board . . . . . . . . . . . . . . -7: Figure 6- Installing the fan, line filter, and line power cable . . . . . -8: Figure 6- Installing the AC line filter and shield . . . . . . . . . . . . . . -9: Figure 6-10: Installing the line filter and line power cable . . . . . . . . Figure 6-11: Removing the J500 connector clip . . . . . . . . . . . . . . . . . Figure 6-12: Disconnect main board cable connectors . . . . . . . . . . . Figure 6-13: Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-14: Install the J500 connector clip . . . . . . . . . . . . . . . . . . . . Figure 6-15: Front chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-16: Display module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-17: Front-panel cable routing . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-18: Disconnect back light cables . . . . . . . . . . . . . . . . . . . . . Figure 6-19: Remove inverter board . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-20: Remove display from display chassis . . . . . . . . . . . . . . Figure 6-21: Remove back light tube . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-22: Installing display glass shield . . . . . . . . . . . . . . . . . . . . . Figure 6-23: Remove front-panel knobs . . . . . . . . . . . . . . . . . . . . . . . Figure 6-24: Remove front-panel board . . . . . . . . . . . . . . . . . . . . . . . Figure 6-25: Remove front-panel keypads . . . . . . . . . . . . . . . . . . . . . Figure 6-26: Checking front-panel lock nuts . . . . . . . . . . . . . . . . . . . Figure 6-27: Primary troubleshooting procedure . . . . . . . . . . . . . . . Figure 6-28: AC power supply troubleshooting procedure . . . . . . . . Figure 6-29: Module isolation troubleshooting procedure . . . . . . . . 3-1 6-8 6-9 6-11 6-12 6-13 6-14 6-16 6-18 6-19 6-20 6-22 6-23 6-24 6-26 6-27 6-28 6-29 6-30 6-31 6-32 6-33 6-34 6-35 6-36 6-37 6-38 6-40 6-41 6-42
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Table of Contents
Figure 10- Exploded view, front case half . . . . . . . . . . . . . . . . . . . . -1: Figure 10- Exploded view, LCD display . . . . . . . . . . . . . . . . . . . . . -2: Figure 10- Exploded view, main board and disk drive . . . . . . . . . -3: Figure 10- Exploded view, circuit board assembly and fan . . . . . . -4: Figure 10- Exploded view, rear case half . . . . . . . . . . . . . . . . . . . . . -5:
10-4 10-6 10-8 10-10 10-13
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Table of Contents
List of Tables
Table 1- Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1: Table 6- Internal inspection check list . . . . . . . . . . . . . . . . . . . . . . -1: Table 6- Removal and installation procedures . . . . . . . . . . . . . . . . -2: Table 7- TDS3000B Series options . . . . . . . . . . . . . . . . . . . . . . . . . -1: 1-1 6-3 6-6 7-1
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Table of Contents
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TDS3000B Series Service Manual
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified.
To Avoid Fire or Personal Injury
Use Proper Power Cord. Use only the power cord specified for this product and certified for the country of use. Connect and Disconnect Properly. Connect the probe output to the measurement instrument before connecting the probe to the circuit under test. Disconnect the probe input and the probe ground from the circuit under test before disconnecting the probe from the measurement instrument. Ground the Product. When operating with AC power, this product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded. When operating with battery power, this product must still be grounded. To prevent electric shock, always connect a grounding wire between the ground terminal on the rear panel and earth ground. Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings and markings on the product. Consult the product manual for further ratings information before making connections to the product. Connect the ground lead of the probe to earth ground only.
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General Safety Summary
Replace Batteries Properly. Replace batteries only with the proper type and rating specified. Recharge Batteries Properly. Recharge batteries for the recommended charge cycle only. Do Not Operate Without Covers. Do not operate this product with covers or panels removed. Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present. Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel. Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation. Refer to the manual's installation instructions for details on installing the product so it has proper ventilation.
Safety Terms and Symbols
Terms in this Manual. These terms may appear in this manual: W ARNING. Warning statements identify conditions or practices that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.
Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking. WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product.
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TDS3000B Series Service Manual
General Safety Summary
Symbols on the Product. These symbols may appear on the product:
WARNING High Voltage
Protective Ground (Earth) Terminal
CAUTION Refer to Manual
Battery Information
Ethernet Port
Chassis Ground
Preventing Electrostatic Damage CAUTION. Electrostatic discharge (ESD) can damage components in the
oscilloscope and its accessories. To prevent ESD, observe these precautions when directed to do so.
Use a Ground Strap. Wear a grounded antistatic wrist strap to discharge the static voltage from your body while installing or removing sensitive components. Use a Safe Work Area. Do not use any devices capable of generating or holding a static charge in the work area where you install or remove sensitive components. Avoid handling sensitive components in areas that have a floor or benchtop surface capable of generating a static charge. Handle Components Carefully. Do not slide sensitive components over any surface. Do not touch exposed connector pins. Handle sensitive components as little as possible. Transport and Store Carefully. Transport and store sensitive components in a static-protected bag or container.
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General Safety Summary
Product End-of-Life Handling
Observe the following guidelines when recycling an instrument or component: Mercury Notification. This oscilloscope uses an LCD backlight lamp that contains mercury. Disposal may be regulated due to environmental considerations. Please contact your local authorities or the Electronics Industries Alliance (www.eiae.org) for disposal or recycling information. Battery Recycling. This product may contain a Nickel Cadmium (NiCd) or lithium ion (Li-ion) rechargeable battery, which must be recycled or disposed of properly. Please properly dispose or recycle the battery according to local government regulations.
Transportation and Lithium Ion Batteries
The TDS3BATB lithium ion rechargeable battery pack contains less than 8 grams of lithium, with individual cells containing less than 1.5 grams of lithium, as measured by International Civil Aviation Organization (ICAO) standards. Consult your air carrier for applicability and determination of any special lithium ion battery transportation requirements.
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TDS3000B Series Service Manual
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present. Disconnect Power. To avoid electric shock, switch off the instrument power, then disconnect the power cord from the mains power. Use Care When Servicing With Power On. Dangerous voltages or currents may exist in this product. Disconnect power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components. To avoid electric shock, do not touch exposed connections.
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Environmental Considerations
This section provides information about the environmental impact of the product.
Product End-of-Life Handling
Observe the following guidelines when recycling an instrument or component: Equipment Recycling. Production of this equipment required the extraction and use of natural resources. The equipment may contain substances that could be harmful to the environment or human health if improperly handled at the product's end of life. In order to avoid release of such substances into the environment and to reduce the use of natural resources, we encourage you to recycle this product in an appropriate system that will ensure that most of the materials are reused or recycled appropriately. The symbol shown to the left indicates that this product complies with the European Union's requirements according to Directive 2002/96/EC on waste electrical and electronic equipment (WEEE). For information about recycling options, check the Support/Service section of the Tektronix Web site (www.tektronix.com). Battery Recycling. This product may contain a Nickel Cadmium (NiCd) or lithium ion (Li-ion) rechargeable battery, which must be recycled or disposed of properly. Please properly dispose of or recycle the battery according to local government regulations. Mercury Notification. This product uses an LCD backlight lamp that contains mercury. Disposal may be regulated due to environmental considerations. Please contact your local authorities or, within the United States, the Electronics Industries Alliance (www.eiae.org) for disposal or recycling information.
Transporting Batteries
The lithium ion rechargeable battery pack in this product contains less than 8 grams of equivalent lithium content, with individual cells containing less than 1.5 grams of equivalent lithium, as measured by International Civil Aviation Organization (ICAO) standards. Consult your air carrier for applicability and determination of any special lithium ion battery transportation requirements.
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Environmental Considerations
Restriction of Hazardous Substances
This product has been classified as Monitoring and Control equipment, and is outside the scope of the 2002/95/EC RoHS Directive. This product is known to contain lead, cadmium, mercury, and hexavalent chromium.
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Preface
This Service manual provides information to troubleshoot, disassemble, and repair the following TDS3000B Series Digital Phosphor Oscilloscopes instrument to the module level: H H H H H H H H H TDS3012B TDS3014B TDS3024B TDS3032B TDS3034B TDS3044B TDS3052B TDS3054B TDS3064B
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Specifications
Specifications
This appendix contains specifications for the TDS3000B Series oscilloscopes. All specifications are guaranteed unless noted as "typical." Typical specifications are provided for your convenience but are not guaranteed. Specifications that are marked with the n symbol are checked in Performance Verification. All specifications apply to all TDS3000B models unless noted otherwise. To meet specifications, two conditions must first be met: H H The oscilloscope must have been operating continuously for twenty minutes within the operating temperature range specified. You must perform the Compensate Signal Path operation described on page 2- prior to evaluating specifications. If the operating temperature -22 changes by more than 10 °C, you must perform the Compensate Signal Path operation again.
Table 1- 1: Specifications
Acquisition Acquisition modes Single Sequence g q Sample (Normal), Peak detect, Envelope, and Average Acquisition mode Sample, Peak Detect Average, Envelope Acquisition stops after One acquisition, all channels simultaneously N acquisitions, all channels simultaneously, N is settable from 2 to 256 (or for Envelope)
TDS3000B Series Service Manual
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Specifications
Table 1- 1: Specifications (cont.)
Inputs Input coupling Input impedance, DC coupled Maximum voltage at g input BNC (1 M) DC, AC, or GND Channel input remains terminated when using GND coupling. 1 M ±1% in parallel with 13 pF ±2 pF, TekProbe compatible 50 ±1%; VSWR 1.5:1 from DC to 500 MHz, typical Overvoltage category CAT I Environment (refer to page 1-- 11) CAT II Environment (refer to page 1-- 11) Maximum voltage 150 VRMS (400 Vpk) 100 VRMS (400 Vpk)
For steady-state sinusoidal waveforms, derate at 20 dB/decade above 200 kHz to 13 Vpk at 3 MHz and above. Maximum voltage at input BNC (50 ) Maximum floating voltage 5 VRMS with peaks ±30 V 0 V from chassis (BNC) ground to earth ground, or 30 VRMS (42 Vpk) only under these conditions: no signal voltages >30 VRMS (>42 Vpk), all common leads connected to the same voltage, no grounded peripherals attached Measured on one channel, with test signal applied to another channel, and with the same scale and coupling settings on each channel Frequency range 100 MHz 200 MHz 300 MHz 400 MHz 500 MHz 600 MHz Differential delay, typical Crosstalk 100:1 50:1 50:1 30:1 30:1 30:1
Channel-to-channel crosstalk, typical , yp
100 ps between any two channels with the same scale and coupling settings
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Specifications
Table 1- 1: Specifications (cont.)
Vertical Number of channels Digitizers SCALE Range g (at BNC) Fine SCALE Polarity Position range n Analog bandwidth, 50 , (also i ( l typicall at 1 M M with standard probe) TDS30x2B 2 plus external trigger input TDS30x4B 4 plus external trigger input
9-bit resolution, separate digitizers for each channel sample simultaneously 1 M 1 mV/div to 10 V/div Adjustable with 1% resolution Normal and Invert ±5 divisions Bandwidth limit set to Full, operating ambient 30 °C, derate 1%/°C above 30 °C Scale range TDS301xB TDS302xB TDS303xB TDS304xB TDS305xB TDS306xB 5 mV/div to 1 V/div 100 MHz 200 MHz 300 MHz 400 MHz 500 MHz1 600 MHz1,2 2 mV/div to 4.98 mV/div 100 MHz 200 MHz 250 MHz 250 MHz 300 MHz1 300 MHz1 3.5 ns 1.75 ns 1.2 ns 0.9 ns 0.7 ns 0.6 ns 1 mV/div to 1.99 mV/div 90 MHz 150 MHz 150 MHz 150 MHz 175 MHz1 175 MHz1 50 1mV/div to 1 V/div
Calculated rise time, typicall ti t i
TDS301xB TDS302xB TDS303xB TDS304xB TDS305xB TDS306xB
1 2
Values typical for 1 mV/div through 9.98 mV/div. 500 MHz typical at 5 mV/div to 9.98 mV/div; 600 MHz at 10 mV/div and greater.
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Specifications
Table 1- 1: Specifications (cont.)
Vertical Analog bandwidth limit, typical Selectable between 20 MHz, 150 MHz (not available on TDS301xB), or Full
Lower frequency limit, 7 Hz for 1 M, reduced by a factor of ten when using a 10X passive AC coupled, typical probe; 140 kHz for 50 Peak detect or Envelope pulse p p response, typicall i Minimum width of pulse with amplitude of 2 div to capture 50% or greater amplitude Sample rates 125 MS/s 1 ns DC gain accuracy DC measurement accuracy Sample rates 250 MS/s 1/sample rate
± 2%, derated at 0.025%/°C for temperatures below +18 °C and above +30 °C, in Sample or Average acquisition mode Measurement type DC Accuracy (in volts) ± [0.022 ¢ | reading - (offset position) | + offset accuracy + 0.15 div + 0.6 mV] ± [0.022 ¢ | reading | + 0.15 div + 1.2 mV] ± [0.022 ¢ | reading - (offset position) | + offset accuracy + 0.1 div] ± [0.022 ¢ | reading | + 0.05 div] Offset range ±100 mV ±1 V ±10 V ±100 V
Sample acquisition Absolute measurement of any mode, typical waveform point Delta voltage between any two points on a waveform n Average acquisition mode (16 averages) ( g ) Absolute measurement of any waveform point Delta voltage between two points on a waveform Offset range g Scale range 1 mV/div to 9.95 mV/div 10 mV/div to 99.5 mV/div 100 mV/div to 995 mV/div 1V/div to 10 V/div Offset accuracy, all ranges
± [0.005 ¢ | offset - position | + 0.1 div] Note: Convert both the constant offset and position terms to volts by multiplying by the volts/div setting
2
0.02 term (gain component) derated at 0.00025/°C above 30 °C
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Specifications
Table 1- 1: Specifications (cont.)
Horizontal Acquisition (horizontal) resolution Maximum acq rate, typical Sample rate range Normal Fast trigger Seconds/division range n Sample rate and delay time accuracy Trigger External trigger input, typical TDS30x2B: 1 M in parallel with 17 pF, TekProbe compatible TDS30x4B: 1 M in parallel with 52 pF, not TekProbe compatible External trigger gg maximum voltage Overvoltage category CAT I Environment (refer to page 1-- 11) CAT II Environment (refer to page 1-- 11) Maximum voltage 150 VRMS (400 Vpk) 100 VRMS (400 Vpk) Normal (10,000 point record) 700 wfms/s TDS301xB 100 S/s to 1.25 GS/s 5 S/s to 1.25 GS/s 4 ns/div to 10 s/div TDS302xB, TDS303xB 100 S/s to 2.5 GS/s 5 S/s to 2.5 GS/s 2 ns/div to 10 s/div Fast trigger (500 point record) 3,600 wfms/s TDS304xB-TDS306xB 100 S/s to 5 GS/s 5 S/s to 5 GS/s 1 ns/div to 10 s/div
±20 ppm over any 1 ms time interval
For steady-state sinusoidal waveforms, derate at 20 dB/decade above 200 kHz to 13 Vpk at 3 MHz and above External trigger maximum floating voltage 0 V from chassis (BNC) ground to earth ground 30 VRMS (42 Vpk) only under these conditions: no signal voltages >30 VRMS (>42 Vpk), all common leads connected to the same voltage, no grounded peripherals attached Source Any channel, DC coupled Sensitivity 0.6 div from DC to 50 MHz, increasing to 1 div at oscilloscope bandwidth Sensitivity 200 mV from DC to 50 MHz, increasing to 750 mV at 300 MHz 500 mV from DC to 50 MHz, increasing to 3 V at 300 MHz
n Edge trigger g gg sensitivity
Edge trigger g gg sensitivity, typical
Source External trigger External/10 trigger
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Specifications
Table 1- 1: Specifications (cont.)
Trigger Any channel, NOISE REJ coupled 3.5 times the DC-coupled limits Any channel, HF REJ coupled 1.5 times the DC-coupled limit from DC to 30 kHz, attenuates signals above 30 kHz 1.5 times the DC-coupled limits for frequencies above 80 kHz, attenuates signals below 80 kHz Sensitivity ±8 divisions from center of screen, ±8 divisions from 0 V if LF REJ trigger coupled ±800 mV ±8 V Fixed at the midlevel of the AC line
Any channel, LF REJ coupled
Trigger level range gg g
Source Any channel
External trigger External/10 trigger Line SET LEVEL TO 50%, typical Trigger level gg accuracy, typical Operates with input signals 45 Hz Source Any channel External trigger External/10 trigger Line Trigger holdoff range Video trigger gg sensitivity, typical 250.8 ns to 10 s
Sensitivity ±0.2 divisions ±20 mV ±200 mV N/A
Triggers on negative sync of NTSC, PAL, or SECAM signal Source Any channel External trigger External/10 trigger Sensitivity 0.6 to 2.5 divisions of video sync tip 150 mV to 625 mV of video sync tip 1.5 V to 6.25 V of video sync tip
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Specifications
Table 1- 1: Specifications (cont.)
Trigger B Trigger Range Minimum time between arm and trigger, typical Minimum Pulse Width, typical Maximum Frequency, typical Display Display screen Display resolution Backlight intensity, typical Display color External display filter I/O ports Ethernet port Parallel printer port GPIB interface RS-232 interface VGA signal output Probe compensator output, typical Miscellaneous Nonvolatile memory Floppy disk Internal clock Typical retention time 5 years for front-panel settings, unlimited for saved waveforms and setups 3.5 in, DOS format, 720 KB or 1.44 MB compatible Provides date/time stamp for stored data and the current time and date to the display, if enabled RJ-45 female connector 10BaseT DB-25 female connector, Centronics compatible Available with optional accessory TDS3GV DB-9 male connector, available with optional accessory TDS3GV DB-15 female connector, 31.6 kHz sync rate, EIA RS-343A compliant, available with optional accessory TDS3GV 5.0 V into 1 M load, frequency = 1 kHz 6.5 in (165 mm) diagonal color liquid crystal 640 horizontal by 480 vertical pixels 200 cd/m2 Up to 16 colors, fixed palette Scratch-resistant tempered glass Trigger After Time 13.2 ns to 50 s 5ns from the end of the time period and the B trigger event -- -- Trigger After B Events 1 event to 9,999,999 events 5 ns between the A trigger event and the first B trigger event B event width, 2 ns B event frequency, 250 MHz
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Specifications
Table 1- 1: Specifications (cont.)
Power sources AC line power Source voltage Source frequency Power consumption Battery power Operating time, typical Battery charge time, typical Line fuse Environmental Temperature Operating range (no disk installed): +5 °C to +50 °C Nonoperating range (no disk installed): - 20 °C to +60 °C Typical operating range for floppy disks: +10 °C to +50 °C Humidity Operating range (no disk installed): 20% to 80% RH below 32 °C, derate upper limit to 21% RH at 50 °C Nonoperating range (no disk installed): 5% to 90% RH below 41 °C, derate upper limit to 30% RH at 60 °C Typical operating range for floppy disks: 20% to 80% RH below 32 °C, derate upper limit to 21% RH at 50 °C Pollution Degree Pollution Degree 2: Typical home or office environment. Operates the oscilloscope and charges the optional internal battery 90 VRMS to 250 VRMS, continuous range 47 Hz to 440 Hz 75 W maximum Optional accessory TDS3BATB, rechargeable battery pack 3 hours, depending on operating conditions 30 hours in the oscilloscope, 5 hours using the optional external charger TDS3CHG Internal, not user replaceable
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Specifications
Table 1- 1: Specifications (cont.)
Environmental Altitude Random vibration Operating limit: 3000 m Nonoperating limit: 15,000 m Operating: 0.31 gRMS from 5 Hz to 500 Hz, 10 minutes on each axis Nonoperating: 2.46 gRMS from 5 Hz to 500 Hz, 10 minutes on each axis Drop resistance, typical Mechanical Size Height: 176 mm (6.9 in), 229 mm (9.0 in) including handle Width: 375 mm (14.75 in) Depth: 149 mm (5.9 in) Weight Oscilloscope only: 3.2 kg (7.0 lbs) With accessories and carry case: 4.1 kg (9.0 lbs) When packaged for domestic shipment: 5.5 kg (12.0 lbs) Optional TDS3BATB battery pack: 0.85 kg (1.9 lbs) Survives a 152 mm (6 in) drop onto concrete with only cosmetic damage
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Specifications
Table 1- 1: Specifications (cont.)
EMC certifications and compliances EMC Compliance: European Union Meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities: EN 61326 EMC requirements for Class A electrical equipment for measurement, control, and laboratory use 1,2 IEC 61000-4-2 Electrostatic discharge immunity (Performance criterion B) IEC 61000-4-3 RF electromagnetic field immunity (Performance criterion B)3 IEC 61000-4-4 Electrical fast transient/burst immunity (Performance criterion B) IEC 61000-4-5 Power line surge immunity (Performance criterion B) IEC 61000-4-6 Conducted RF immunity (Performance criterion B)4 IEC 61000-4-11 Voltage dips and interruptions immunity (Performance criterion B) EN 61000-3-2 AC power line harmonic emissions EN 61000-3-3 Voltage changes, fluctuations and flicker
1
Emissions that exceed the levels required by this standard may occur when this equipment is connected to a test object. To ensure compliance to the standards listed above, attach only high quality shielded cables to this instrument. High quality shielded cables typically are braid and foil types that have low impedance connections to shielded connectors at both ends. The increase in trace noise while subjected to a test field (3 V/m over the frequency range 80 MHz to 1 GHz, with 80% amplitude modulation at 1 kHz) is not to exceed 8 major divisions peak-to-peak. Ambient conducted fields may induce triggering when the trigger threshold is offset less than 4 major divisions from ground reference. The increase in trace noise while subjected to a test field (3 V/m over the frequency range 150 kHz to 80 MHz, with 80% amplitude modulation at 1 kHz) is not to exceed 2 major divisions peak-to-peak. Ambient conducted fields may induce triggering when the trigger threshold is offset less than 1 major division from ground reference.
2
3
4
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Specifications
Table 1- 1: Specifications (cont.)
EMC certifications and compliances EMC Compliance: Australia/New Zealand EMC Compliance: Russia FCC Compliance: U.S.A. EC Declaration of Conformity - Low Voltage (TDS3000B Series, P3010, and P6139A) (P3010 and P6139A) Meets the intent of Australian EMC Framework as demonstrated to the following specification: AS/NZS 2064.1/2 This product was certified by the GOST ministry of Russia to be in compliance with all applicable EMC regulations. Emissions comply with FCC Code of Federal Regulations 47, Part 15, Subpart B, Class A Limits Compliance was demonstrated to the following specification as listed in the Official Journal of the European Communities: Low Voltage Directive 73/23/EEC as ammended by 93/68/EEC EN 61010-1/A2:1995 Safety requirements for electrical equipment for measurement, control, and laboratory use EN 61010-2-031:1995 Particular requirements for hand-held probe assemblies for electrical measurement and test equipment UL3111-1 - Standard for electrical measuring and test equipment CAN/CSA C22.2 No. 1010.1 - Safety requirements for electrical equipment for measurement, control and laboratory use EN 61010-2-031:1995 - Particular requirements for hand-held probe assemblies for electrical measurement and test equipment
Safety certifications and compliances
Approvals (TDS3000B Series, P3010, and P6139A) (P3010 and P6139A)
Installation/ Terminals on this product may have different installation category Overvoltage Category designations. The installation categories are: Descriptions CAT III Distribution-level mains (usually permanently connected). Equipment at this level is typically in a fixed industrial location Local-level mains (wall sockets). Equipment at this level includes appliances, portable tools, and similar products. Equipment is usually cord-connected Secondary (signal level) or battery operated circuits of electronic equipment
CAT II
CAT I
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Operating Information
Operating Information
This chapter provides an overview of the following topics: H H H H H H H H Connecting power and using the battery pack Installing an application module Installing a communication module Front-panel menus and controls Front- and rear-panel connectors Probe compensation Self calibration Transporting the oscilloscope
For more detailed information about operating information, see the TDS3000B Series Digital Phosphor Oscilloscope User Manual. For information about unpacking and inspecting the instrument, see Unpacking and Repacking Instructions on page 6- of this manual. -43
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Operating Information
Connecting Power
To connect a power cord, do these steps: 1. Open the strain relief clip and slip it onto the power cord. 2. Snap the strain relief into its hole in the rear panel of the oscilloscope. 3. Connect the power cord to the power input connector. You can operate the oscilloscope from a grounded mains supply with line voltage between 90 VAC and 250 VAC and frequency between 47 Hz and 440 Hz. The oscilloscope is grounded through the power cord. The line fuse is internal and is not user replaceable.
Using Battery Power
You can operate the oscilloscope continuously for up to three hours from the TDS3BATB rechargeable battery pack. A triangle icon in the display ( ) shows when the battery is in use, a power-plug icon ( ) shows when line power is ) shows the relative charge level in the battery. connected, and a gauge icon ( The oscilloscope turns off automatically when the battery runs low. Refer to the General Safety Summary for information about proper rechargeable battery disposal.
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Operating Information
Operating Safely with Battery Power
WARNING. To avoid electric shock, always connect the rear-panel ground terminal to earth ground when operating the instrument from battery power. For safe operation, the oscilloscope chassis must remain at earth ground potential even when operating from battery power. Without a connection between the chassis and earth ground, you can receive a shock from exposed metal on the chassis if you connect an input to a hazardous voltage (>30 VRMS, >42 Vpk). To protect against this condition, attach the Tektronix-supplied grounding wire from the terminal on the rear panel to earth ground. If you use a different grounding wire, it must be larger than 18 gauge (1 mm2).
When you start to use the battery pack, an on-screen message reminds you to connect the grounding wire between the ground terminal on the rear panel and earth ground.
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Operating Information
Installing and Removing the Battery
To install the optional battery pack, do these steps: 1. Open the battery compartment door on the rear panel and remove the accessory tray.
Battery door
2. Slide the battery into the compartment and press it in from both sides until you hear the latches click. 3. Press on both sides of the battery compartment door to snap it closed.
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Operating Information
To remove the battery, do these steps: 1. Open the battery compartment door. 2. Lift the battery handles and pull the battery out of the oscilloscope.
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Operating Information
Charging the Battery
The battery charges automatically when the oscilloscope is connected to line power. You can also charge the battery with the optional external charger (TDS3CHG).
Configuration Battery charging in oscilloscope with oscilloscope turned on or off Battery charging with TDS3CHG external charger Typical charging time 30 hours 5 hours
NOTE . Charge the battery before using it for the first time or after prolonged storage.
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Operating Information
Installing an Application Module CAUTIO To avoid damage to the oscilloscope or application module, observe N.
the ESD precautions described on page ix. Optional application packages are available to extend the capability of your oscilloscope. You can install up to four application modules at one time. Application modules can go into the two slots with windows in the upper right corner of the front panel. Two additional slots are directly behind the two you can see.
Application modules
Contacts
Refer to the TDS3000 & TDS3000B Series Application Module Installation Instructions that came with your application module for instructions on installing and testing an application module. NOTE. If you remove an application module, the functions provided by the application module become unavailable. You can reinstall the module to restore the functions.
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Operating Information
Installing a Communication Module CAUTIO To avoid damage to the oscilloscope or communication module, N.
observe the ESD precautions described on page ix. To install the optional communication module, do these steps: 1. Turn the oscilloscope power off. 2. Press down on the latching tab to remove the blank cover. 3. Slide the communication module into the compartment until the internal connectors are seated and the latching tab locks. 4. Turn power on. The communication module is now ready for your use. To remove a communication module, do these steps: 1. Turn the oscilloscope power off. 2. Press down on the latching tab and then use a small screwdriver to alternately pry out the sides of the communication module. 3. Slide out the communication module and store it in an ESD-shielded bag. Install the blank cover if no other communication module is to be installed.
Latching tab
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Operating Information
Front-Panel Menus and Controls
The front panel has buttons and controls for the functions you use most often. The front panel has menus to access more specialized functions.
Using the Menu System
To use the menu system, follow the steps shown on the next two pages. 1. Push a dark-colored front-panel menu button to display the menu you want to use.
MEASURE SAVE/RECALL QUICKMENU
CURSOR
DISPLAY
UTILITY
VERTICAL
HORIZONTAL
TRIGGER
ACQUIRE
2. Push a bottom screen button to select a menu item. If a pop-up menu appears, continue to push the screen button to select an item from the pop-up menu.
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Operating Information
3. Push a side screen button to choose a menu item. If the menu item contains more than one choice, push the side screen button again to make the choice.
4. Certain menu choices require you to set a numerical value to complete the setup. Use the general purpose knob to adjust the parameter value. Push the COARSE button to make larger adjustments.
SELECT
COARSE
VERTICAL
POSITION
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Operating Information
Using the Menu Buttons
You can use the menu buttons to perform many functions in the oscilloscope.
SELECT
MEASURE SAVE/RECALL QUICKMENU
COARSE
CURSOR
DISPLAY
UTILITY
1 2
3
4
5 6
1. MEASURE. Performs automated measurements of waveforms. 2. CURSOR. Activates the cursors. 3. SAVE/RECALL. Saves and recalls setups and waveforms to memory or a floppy disk. 4. DISPLAY. Changes the appearance of waveforms and the display screen. 5. QUICKMENU. Activates QuickMenus such as the built-in Quick Scope feature. 6. UTILITY. Activates the system utility functions, such as selecting a language.
VERTICAL
POSITION
HORIZONTAL
POSITION
TRIGGER
LEVEL
ACQUIRE
SCALE
SCALE
WAVEFORM INTENSITY
7
8
9
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Operating Information
7. Vertical MENU. Adjusts the scale, position, and offset of waveforms. Sets the input parameters. 8. Trigger MENU. Adjusts the trigger functions. 9. Acquire MENU. Sets the acquisition modes and horizontal resolution, resets the delay time, and accesses the WaveAlertt menu.
Using the Dedicated Controls
These dedicated buttons and controls generally control waveforms and cursors without the use of menus.
3
SELECT
4
5
6
MEASURE SAVE/RECALL QUICKMENU
2
COARSE CURSOR DISPLAY UTILITY
1
VERTICAL
POSITION
HORIZONTAL
POSITION
TRIGGER
LEVEL
ACQUIRE
7 8 9 10
19
SCALE
SCALE
WAVEFORM INTENSITY
11 12 13
18
17 16 15
14
1. COARSE. Causes the general purpose knob and position knobs to make adjustments more quickly. 2. SELECT. Toggles between the two cursors to select the active cursor. 3. General purpose knob. Moves the cursors. Sets numerical parameter values for some menu items. Push COARSE to make adjustments quickly. 4. Vertical POSITION. Adjusts the vertical position of the selected waveform. Push COARSE to make adjustments more quickly. 5. Horizontal POSITION. Adjusts the trigger point location relative to the acquired waveforms. Push COARSE to make adjustments quickly.
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Operating Information
6. Trigger LEVEL. Adjusts the trigger level. 7. RUN/STOP. Stops and restarts acquisition. 8. SINGLE SEQ. Sets acquisition, display, and trigger parameters for a single-shot (single-sequence) acquisition. 9. SET TO 50%. Sets the trigger level to the midpoint of the waveform. 10. AUTOSET. Automatically sets the vertical, horizontal, and trigger controls for a usable display. 11. FORCE TRIG. Forces an immediate trigger event. 12. WAVEFORM INTENSITY. Controls waveform intensity. 13. B TRIG. Activates the B trigger. Changes the trigger menu to set the B-trigger parameters. 14. DELAY. Enables delayed acquisition relative to the trigger event. Use horizontal POSITION to set the amount of delay. 15. Horizontal SCALE. Adjusts the horizontal scale factor. 16. Horizontal zoom. Splits the screen and magnifies the current acquisition horizontally. 17. Waveform OFF. Removes the selected waveform from the display. 18. Vertical SCALE. Adjusts the vertical scale factor of the selected waveform. 19. CH1, CH2, (CH3, CH4,) MATH. Displays a waveform and chooses the selected waveform. REF shows the reference waveform menu.
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Operating Information
20 21
22
23
20. Hard copy. Initiates a hard copy using the port selected in the Utility menu. 21. Power switch. Turns power to on or standby. 22. Wrist-strap ground. Use to connect a wrist strap when working with ESD-sensitive circuits. This connector is not a safety ground. 23. MENU OFF. Clears menu from the display.
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Operating Information
Identifying Items in the Display
The following items may appear in the display; not all items are visible at any given time. Some readouts move outside the graticule area when menus are turned off.
2 3 4 5 6 7
8 1
13 12 11
9 10
1. Waveform baseline icons show the zero-volt level of the waveforms (ignoring the effect of offset). The icon colors correspond to the waveform colors. 2. Acquisition readout shows when acquisition is running, stopped, or when acquisition preview is in effect. 3. Trigger position icon shows the trigger location in the waveforms. 4. Expansion point icon shows the point that the horizontal scale expands and compresses around. 5. Waveform record icon shows the trigger location relative to the waveform record. The line color corresponds to the selected waveform color. 6. Trigger status readout shows trigger status. 7. Trigger level icon shows the trigger level on the waveform. The icon color corresponds to the trigger source channel color. 8. Cursor and measurement readouts show results and messages. 9. Trigger readouts show the trigger sources, slopes, and levels, and position. 10. Readout shows the delay setting or the trigger location within the record. 11. Horizontal readout shows the main or zoom time/division.
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Operating Information
12. Auxiliary waveform readouts show the vertical and horizontal scale factors of the math or reference waveforms. 13. Channel readouts show the channel scale factor, coupling, input resistance, bandwidth limit, and invert status.
14
15
14. A triangle icon with the battery icon indicates that a battery is installed and battery power is in use. The battery icon shows the approximate charge level of the battery. See page 2- for important safety information. -3 15. A power-plug icon with the battery icon indicates that a battery is installed but line power is in use. The battery may be charging. The battery icon shows the approximate charge level.
Using Quick Menus
The QuickMenu feature simplifies the use of the oscilloscope. When you push the QUICKMENU button, a set of frequently used menu functions show on the display. Then, push the screen buttons around the display to operate the QuickMenu. Using Quick Scope. Quick Scope is one type of QuickMenu that you can use to control the basic oscilloscope functions. You can perform many tasks without using the regular menu system. If you need to use a function that is not contained in the Quick Scope menu, push the button you would normally push to access that function. For example, if you want to add an automatic measurement, push the MEASURE button to set up the measurement. Then, push the QUICKMENU button to return to the Quick Scope menu with the measurement also in the display.
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Operating Information
1
2
7 6
5
4
3
1. Edge Trigger controls. Push these screen buttons to set trigger parameters for edge trigger. 2. Trigger controls if either B trigger or video trigger is selected. 3. Cursor control. Push this screen button to turn on cursors and select the cursor type. Push the SELECT button to toggle between the two cursors to select the active cursor. Use the general purpose knob to move the active cursor. 4. Acquisition controls. Push these screen buttons to set acquisition parameters. 5. Channel vertical controls. Push these screen buttons to set vertical controls for the selected channel. Use the CH1, CH2, CH3, CH4, MATH, and REF buttons to select the channel you want to control. 6. Vertical controls if either the math waveform or a reference waveform is selected. 7. Menu. Push this screen button to select a specific QuickMenu display if more than one is available. NOTE. Items in the Quick Scope display not mentioned above are also contained in the regular display. Those items are described on page 2-15.
Other QuickMenus. Some optional application packages include a custom QuickMenu display. Those QuickMenus contain specific features that are important for the application.
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Operating Information
Front-Panel Connectors
1
1M, 13pF 150 VRMS CATl 1M, 13pF 150 VRMS CATl PROBE COMP 5V
CH 1 CH 2
CH 3 CH 4
50 5VRMS
50 5VRMS
2 1
1M, 13pF 150 VRMS CATl 1M, 17pF 150 VRMS CATl PROBE COMP 5V
CH 1 CH 2
EXT TRIG
50 5VRMS
2
3
1. PROBE COMP. Square wave signal source to compensate probes. 2. CH1, CH 2, (CH3, CH4). Channel inputs with TekProbe interface. 3. EXT TRIG. External trigger input with TekProbe interface (two-channel models only). Four-channel models have an external trigger input on the rear of the oscilloscope.
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Operating Information
Rear-Panel Connectors
1 2 3
4 5 6 7
+14.2 V DC 400 mA
8
1. Power input. Attach to an AC power line with integral safety ground. 2. Parallel printer port. Connect to a printer to make hard copies. 3. Communication Module compartment. Install optional communication modules or the thermal printer. 4. Ethernet port. Connects the oscilloscope to a 10BaseT local area network. 5. External Trigger input (four-channel models only). See the Specifications appendix for external trigger signal requirements. 6. DC power output. Provides ~15 V DC power to accessories or to the plug-in TDS3PRT thermal printer. 7. Ground terminal. Connect to earth ground when using battery power. See page 2- for important safety information. -3 8. CAL switch. For use by authorized service personnel only.
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Operating Information
Communication Module Connectors
1 2 3
TDS3GV
1. GPIB port. Connect to a controller for remote programmability. 2. RS-232 port. Connect to a controller or terminal for remote programmability or printing. 3. VGA port. Connect to a VGA monitor to display the screen image.
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Operating Information
Probe Compensation
Perform this adjustment to match your probe to the input channel. This should be done whenever you attach a passive probe for the first time to any input channel.
1. Connect the oscilloscope probe to channel 1. Attach the probe tip and reference lead to the PROBE COMP connectors, then push AUTOSET. If using the probe hook-tip, ensure a proper connection by firmly twisting the tip onto the probe.
AUTOSET button
PROBE COMP
CH 1
2. Check the shape of the displayed waveform.
Overcompensated
Undercompensated
Compensated correctly
3. If necessary, adjust your probe. Repeat as necessary.
P3010
P6139A
L
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Operating Information
Self Calibration
The self calibration routine lets you quickly optimize the oscilloscope signal path for maximum measurement accuracy. You can run the routine anytime but you should always run the routine if the ambient temperature changes by 10_ C or more. To compensate the signal path, do the following steps: 1. Disconnect any probes or cables from the channel input connectors. 2. Push the UTILITY button. 3. Push the System screen button to select Cal. 4. Push the Signal Path screen button. 5. Push OK Compensate Signal Path. This procedure takes several minutes to complete. NOTE. The signal path compensation does not include calibration to the probe tip.
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Operating Information
Transporting the Oscilloscope
When transporting the oscilloscope, wrap the cord around the handle as shown below. Use the supplied cord retainer if the power plug does not have a molded-in retainer. The oscilloscope front cover has a convenient place to store TDS3000B Series 1/4-size user and reference manuals.
If you are not using a battery, you can use the accessory tray in the battery compartment to store probes and other accessories. CAUTION. To avoid damage to the disk drive, do not transport the oscilloscope with a floppy disk in the disk drive.
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Operating Information
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TDS3000B Series Service Manual
Theory of Operation
Theory of Operation
This chapter describes the electrical operation of the oscilloscope to the module level. Figure 3- shows the oscilloscope module interconnections. -1
Display back light inverter power Battery pack AC Line J150 Power supply J180 Battery bd Fan J170 J400 J120 J100 J200 J700 J800 Attenuator circuit J910 J900 Main board Floppy Disk Drive J500 J860 Comm. module connector J810 Front panel Input ports for application modules
LCD Display Parallel printer connector
J700
15 VDC external device power connector
Ethernet connector
Ch 1 Ch 1
Ch 2 Ch 2
Ch 3
Ch 4 EXT
EXT 4-channel oscilloscopes 2-channel oscilloscopes
Figure 3- 1: TDS3000B series block diagram
Power Supply
The power supply converts AC line voltage to 15 VDC to power all internal circuits and an external power connector. It also supplies power to charge the optional battery pack.
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Theory of Operation
Battery Board
The battery board provides the following functions: H Interfaces to the optional battery pack (powers the oscilloscope from the battery pack or charges the battery pack when the oscilloscope is connected to AC line). Turns on DC power to the oscilloscope. Converts 15 VDC from the power supply to 5 VDC for the main and front panel boards and ±15 VDC for probe power. Powers the cooling fan. Provides 15 VDC to the external power connector for powering external devices. Provides power to the display back light inverter board. Provides an Ethernet 10BaseT connector to connect the oscilloscope to a network.
H H H H H H
Main Board
The Main Board module contains the following functions.
Acquisition System
The acquisition system begins with the analog signal path and ends with a digitized signal in memory. The signal enters a channel input and then passes through an attenuator and preamplifier. The analog signal from each preamplifier goes through a sampler and digitizer, a time base controller, and then into acquisition memory. The analog signal from each preamplifier is also distributed to a trigger circuit. The trigger system processes the analog signals from the preamplifiers and sends trigger information to the time base controller. Advanced trigger functions are enabled only when the appropriate application modules and supporting software is installed. The display system combines live waveform data from acquisition memory with menus and text and stores this information in display memory. It then uses this data to refresh the VGA display module (LCD).
Trigger System
Display System
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Theory of Operation
Processor System
The processor system contains a MPC680DC Power PC microprocessor that controls the entire instrument. The processor system also contains FLASH ROM, system RAM, and interfaces to communication modules, the parallel printer port, and the floppy disk drive. The power converter receives 15 VDC (or battery voltage) from the battery board and generates voltages for the analog and digital circuitry on the main board.
Power Converter
Display Module
The display module consists of a color liquid crystal display (LCD), a display driver, a pair of fluorescent back light tubes, and a high-voltage back light power supply.
Front-Panel Board
The front-panel board contains a microprocessor that reads the front-panel buttons and controls and then sends this information to the processor system. The front-panel board also generates the probe compensation output signal and provides an interface to the application modules.
Disk Drive
The disk drive module consists of a 3.5 inch, IBM format, floppy disk drive. The disk drive is controlled by circuitry on the Main Board.
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Performance Verification
Performance Verification
This chapter contains performance verification procedures for the specifications marked with the n symbol. The following equipment, or a suitable equivalent, is required to complete these procedures.
Minimum requirements 3 mV to 4 V, ±0.1% accuracy
Description DC Voltage Source
Examples Wavetek 9500 Oscilloscope C lib t with O ill Calibrator ith two 9510 Output Modules
Leveled Sine Wave Generator 50 kHz to 600 MHz, ±4% amplitude accuracy Time Mark Generator 50 feedthrough termination 10 ms period, ±5 ppm accuracy BNC connectors
Tektronix part number 011-0099-00
You may need additional cables and adapters, depending on the actual test equipment you use. These procedures cover all TDS3000B oscilloscope models. Please disregard checks that do not apply to the specific model you are testing. Photocopy the test record on the next two pages and use them to record the performance test results for your oscilloscope. NOTE. Successful completion of the performance verification procedure does not update the instrument Calibration Due date and time. Successful completion of the Adjustment Procedure in Section 5 does automatically update the instrument Calibration Due date and time.
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Performance Verification
Test Record
Serial number Procedure performed by Date
Test Self Test
Passed
Failed
Performance checks
Channel 1 DC measurement accuracy 1 mV/div 2 mV/div 5 mV/div 50 mV/div 50 mV/div 50 mV delta 90 mV/div 200 mV/div 1 V/div Channel 2 DC measurement accuracy 1 mV/div 2 mV/div 5 mV/div 50 mV/div 50 mV/div 50 mV delta 90 mV/div 200 mV/div 1 V/div
Low limit
99.25 mV --7.540 mV --101.8 mV 982.4 mV 632.4 mV 340.5 mV --339.3 mV 9.900 V --10.30 V 99.25 mV --7.540 mV --101.8 mV 982.4 mV 632.4 mV 340.5 mV --339.3 mV 9.900 V --10.30 V
Test result
High limit
100.8 mV --6.460 mV --98.24 mV 1.018 V 667.6 mV 359.5 mV --290.7 mV 10.10 V --9.698 V 100.8 mV --6.460 mV --98.24 mV 1.018 V 667.6 mV 359.5 mV --290.7 mV 10.10 V --9.698 V
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Performance Verification
Performance checks
Channel 3 DC measurement accuracy 1 mV/div 2 mV/div 5 mV/div 50 mV/div 50 mV/div 50 mV delta 90 mV/div 200 mV/div 1 V/div Channel 4 DC measurement accuracy 1 mV/div 2 mV/div 5 mV/div 50 mV/div 50 mV/div 50 mV delta 90 mV/div 200 mV/div 1 V/div
Low limit
99.25 mV --7.540 mV --101.8 mV 982.4 mV 632.4 mV 340.5 mV --339.3 mV 9.900 V --10.30 V 99.25 mV --7.540 mV --101.8 mV 982.4 mV 632.4 mV 340.5 mV --339.3 mV 9.900 V --10.30 V
Test result
High limit
100.8 mV --6.460 mV --98.24 mV 1.018 V 667.6 mV 359.5 mV --290.7 mV 10.10 V --9.698 V 100.8 mV --6.460 mV --98.24 mV 1.018 V 667.6 mV 359.5 mV --290.7 mV 10.10 V --9.698 V
Channel 1 bandwidth Channel 2 bandwidth Channel 3 bandwidth Channel 4 bandwidth Channel 1 trigger sensitivity at BW Channel 2 trigger sensitivity at BW Channel 3 trigger sensitivity at BW Channel 4 trigger sensitivity at BW rising slope falling slope rising slope falling slope rising slope falling slope rising slope falling slope
425 mV 425 mV 425 mV 425 mV stable trigger stable trigger stable trigger stable trigger stable trigger stable trigger stable trigger stable trigger
-- -- -- -- -- -- -- -- -- -- -- --
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Performance Verification
Performance checks Channel 1 trigger sensitivity at 50 MHz Channel 2 trigger sensitivity at 50 MHz Channel 3 trigger sensitivity at 50 MHz Channel 4 trigger sensitivity at 50 MHz rising slope falling slope rising slope falling slope rising slope falling slope rising slope falling slope
Low limit stable trigger stable trigger stable trigger stable trigger stable trigger stable trigger stable trigger stable trigger
Test result
High limit -- -- -- -- -- -- -- -- +2 divisions
Sample rate and delay time accuracy - 2 divisions
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TDS3000B Series Service Manual
Performance Verification
Performance Verification Procedures
The following three conditions must be met prior to doing these procedures: 1. The oscilloscope must have been operating continuously for twenty (20) minutes in an environment the meets the operating range specifications for temperature and humidity. 2. You must perform the Compensate Signal Path operation described on page 2-22. If the operating temperature changes by more than 10° C, you must perform the Compensate Signal Path operation again. 3. You must connect the oscilloscope and the test equipment to the same AC power circuit. Connect the oscilloscope and test instruments into a common power strip if you are unsure of the AC power circuit distribution. Connecting the oscilloscope and test instruments into separate AC power circuits can result in offset voltages between the equipment, which can invalidate the performance verification procedure. The time required to complete the entire procedure is approximately one hour. W ARNING. Some procedures use hazardous voltages. To prevent electrical shock, always set voltage source outputs to 0 V before making or changing any interconnections.
Self Test
This procedure uses internal routines to verify that the oscilloscope functions and passes its internal self tests. No test equipment or hookups are required. Start the self test with these steps: 1. Disconnect all probes and cables from the oscilloscope inputs. 2. Push the UTILITY menu button. 3. Push the System screen button to select Diags. 4. Push the Loop screen button and choose Once. 5. Push the Execute screen button. 6. Push the OK Confirm Run Test screen button. A dialog box displays the result when the self test completes. Push the MENU OFF screen button to continue operation.
TDS3000B Series Service Manual
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Performance Verification
Check DC Voltage Measurement Accuracy
This test checks the DC voltage measurement accuracy in the average acquisition mode. 1. Set the DC voltage source output level to 0 V. 2. Connect the DC voltage source to the oscilloscope channel 1 input as shown below. Push the channel 1 selection button (CH 1).
DC voltage source Oscilloscope
Ch 1
3. Push the SAVE/RECALL menu button. 4. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button. 5. Push the acquire MENU button. 6. Push the Mode screen button and then push the Average screen button. 7. Adjust the number of averages to 16 with the general purpose knob. 8. Go to step 11. 9. Move the DC voltage source output cable to the oscilloscope channel you want to check. 10. Push the channel button (CH 1, CH 2, CH 3, or CH 4) for the channel you want to check. 11. Push the MEASURE menu button. 12. Push the Select Measurement screen button. 13. Push the - more - screen button until you can select the Mean measurement. 14. Push the vertical MENU button.
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TDS3000B Series Service Manual
Performance Verification
Vertical SCALE setting 1 mV/div 2 mV/div 5 mV/div 50 mV/div 50 mV/div 50 mV delta2 90 mV/div 3 200 mV/div 1 V/div
1 2 3
Invert setting Off Off Off Off Off
Bandwidth limit setting 20 MHz 20 MHz 20 MHz Full Full
Offset 96.5 mV 0.0 V --82.5 mV 825 mV1 825 mV1
Input voltage 100 mV --7 mV --100 mV 1.0 V 650 mV
Low limit 99.25 mV --7.540 mV --101.8 mV 982.4 mV 632.4 mV 340.5 mV
High limit 100.8 mV --6.460 mV --98.24 mV 1.018 V 667.6 mV 359.5 mV --290.7 mV 10.10 V --9.698 V
Off Off On 5
Full 150 MHz 4 150 MHz 4
0.0 V 9.3 V --6.5 V
--315 mV 10 V 10 V
--339.3 mV 9.900 V --10.30 V
Set the vertical offset to 0 V before adjusting the vertical offset to 825 mV. Refer to step 15e on page 4-- 7 to calculate 50 mV delta measurement. Push the Vertical MENU button, push the Fine Scale screen button, then use the general purpose knob to adjust the setting to 90 mV/div. Use the Full bandwidth setting on the TDS3012B or TDS3014B oscilloscopes. Make sure to turn Invert setting to On for this measurement.
4 5
15. For each row of the table, do these steps: a. Set the vertical SCALE control to the setting in the table. b. Set the Invert and Bandwidth Limit controls to the settings in the table. c. Set the output of the DC voltage source to the voltage level in the table. d. Verify that the oscilloscope Mean measurement is within the limits listed in the above table. e. For the 50 mV delta measurement, subtract the second 50 mV measurement from the first 50 mV measurement; verify that the difference is within the limits stated in the Delta row of the table. 16. Repeat steps 15a through 15e for each row in the table. 17. Push the waveform off button.
18. Repeat steps 9 through 17 for each channel of the oscilloscope (not including the external trigger input).
TDS3000B Series Service Manual
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Performance Verification
Check Bandwidth
This test checks the bandwidth for each channel. 1. Connect the output of the leveled sine wave generator to the oscilloscope channel 1 input as shown below.
Leveled sine wave generator Oscilloscope
Ch 1
2. Push the SAVE/RECALL menu button. 3. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button. 4. Push the acquire MENU button. 5. Push the Mode screen button and then push the Average screen button. 6. Adjust the number of averages to 16 with the general purpose knob. 7. Push the trigger MENU button. 8. Push