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Tr:VSERVICE MANUAL

070-4917-00 Product Grrou 37

070-4917-00 Product Group 37

2430

DIGITAL OSCILLOSCOPE
SERVICE

WARNING

THE FOLLOWING SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID PERSONAL INJURY, DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO. REFER TO OPERATORS SAFETY SUMMARY AND SERVICE SAFETY SUMMARY PRIOR TO PERFORMING ANY SERVICE.

Please Check for CHANGE INFORMATION at the Rear of This Manual

Copyright © 1986 Tektronix, Inc. All rights reserved. Contents of this publication may not be reproduced in any form without the written permission of Tektronix, Inc . Products of Tektronix, Inc. and its subsidiaries are covered by U.S . and foreign patents and/or pending patents . TEKTRONIX, TEK, SCOPE-MOBILE, and are registered trademarks of Tektronix, Inc. TELEQUIPMENT is a registered trademark of Tektronix U .K . Limited . Printed in U .S.A . Specification and price change privileges are reserved.

INSTRUMENT SERIAL NUMBERS Each instrument has a serial number on a panel insert, tag, or stamped on the chassis . The first number or letter designates the country of manufacture . The last five digits of the serial number are assigned sequentially and are unique to each instrument . Those manufactured in the United States have six unique digits. The country of manufacture is identified as follows : 13000000 100000 200000 300000 700000 Tektronix, Inc., Beaverton, Oregon, USA Tektronix Guernsey, Ltd ., Channel Islands Tektronix United Kingdom, Ltd ., London Sony/Tektronix, Japan Tektronix Holland, NV, Heerenveen, The Netherlands

2430 Service

TABLE OF CONTENTS
Page FRONT PANEL PROCESSOR. .. .......... FRONT PANEL CONTROLS .. .. .. .......... SYSTEM DAC AND ACQUISITION CONTROL REGISTERS..... .. .. .. .. .......... SYSTEM DAC (cont) AND AUXILIARY FRONT PANEL... .. .. .......... SYSTEM CLOCKS .. ......... .. ....... .. .. .. .. ... TIME BASE CONTROLLER AND ACQUISITION MEMORY ...... .. .. .. ATTENUATORS AND PREAMPLIFIERS .. .. ......... .. .. .. ......... .. .. . PEAK DETECTORS AND CCD/CLOCK DRIVERS. .. .. .. ........... .. .. .. TRIGGERS AND PHASE CLOCKS ..... JITTER CORRECTION RAMPS .... .. .. .. TRIGGER HOLDOFF, JITTER COUNTERS, AND CALIBRATOR .. ..... CCD OUTPUT . .. .. .. .. ........... .. .. .. .. .......... A/D CONVERTER AND ACQUISITION LATCHES .. .. ........... .. .. .. DISPLAY AND ATTRIBUTES MEMORY ......... .. .. .. .. ........... .. .. .. .. .......... DISPLAY CONTROL ... .... .. .. ........... .. .. .. DISPLAY OUTPUT . .. ......... .. ............. .. .. HIGH VOLTAGE POWER SUPPLY AND CRT .. .. .. ........... .. .. .. .. ..... SYSTEM I/0 .. .. .. ........... .. .. .. .. ........... .. .. .. VIDEO OPTION .... .. .. .. .. ......... .. .. .. .. ....... LOW VOLTAGE POWER SUPPLY . .. .. LOW VOLTAGE REGULATORS ......... 3-26 3-28 3-29 3-31 3-33 3-37 3-41 3-43 3-49 3-54 3-56 3-59 3-60 3-61 3-64 3-71 3-73 3-78 3-82 3-90 3-96

Page LIST OF ILLUSTRATIONS . .. .. .. .. ........... .. .. ..... .. .. .. ........ LIST OF TABLES ... .. .. .. .. ........... .. .. .. .. ....... .. ......... .. .. .. .. . OPERATORS SAFETY SUMMARY . .. .. .. ....... .. .. ....... .. .. SERVICING SAFETY SUMMARY .. .. .. .. .. ........... .. .. ....... Section 1 SPECIFICATION INTRODUCTION .. .... .. ......... .. .. .. .. .......... PERFORMANCE CONDITIONS .... .. .. .. Section 2 PREPARATION FOR USE 1-1 1-2 iii v vi

vii

SAFETY ........... .. .. .. .. ....... .. ......... . . . . . . .. ... LINE VOLTAGE SELECTION . .. .. .. .. ..... LINE FUSE . .. .. .. ....... .. .. ....... .. .. .. .. .......... POWER CORD . ........... .. .. .. .. ........... .. .... INSTRUMENT COOLING........ .. .. .. ..... .. OPERATING INFORMATION. .. ........... . START-UP . ..... .. .. .. ....... .. .. .. .. ........... .. .. .. POWER-DOWN .... .. .. .. .. ........... .. .. .. ..... .. REPACKAGING FOR SHIPMENT . .. ....

2-1 2-1 2-1 2-3 2-3 2-3 2-3 2-4 2-4

Section 3 THEORY OF OPERATION SECTION ORGANIZATION .......... .. .. .... INTEGRATED CIRCUIT DESCRIPTIONS .. .. .. ......... .. .. .. .. ........... . SIMPLIFIED BLOCK DIAGRAM DESCRIPTION .. .. ..... .... .. ....... .. .. .. .. ........... . DETAILED BLOCK DIAGRAM DESCRIPTION .. .. ........... .. .. .. .. ........... .. ...... INTRODUCTION .. ......... .. ....... .. .. .. .. ....... INPUT SIGNAL CONDITIONING AND ANALOG SAMPLING .. .. ........... .. . ACQUISITION PROCESS AND CONTROL. .. ......... .. ....... .. .. .. .. ....... DATA CLOCKING TO ACQUISITION MEMORY ....... .. .. ......... . ANALOG DATA CONDITIONING AND A/D CONVERSION . ........... .. .. .. .. .. ACQUISITION PROCESSING AND DISPLAY ......... .. .. .. .. ........... .. .. .. .. .. DETAILED CIRCUIT DESCRIPTION . .. .. ......... .. .. ........... .. .. .. .. ..... SYSTEM PROCESSOR .. .. ....... .. .. ....... . WAVEFORM PROCESSOR SYSTEM ........ .. .. .. .. . .. . . ...... .. ......... .. .. ..... 3-1 3-1 3-2 3-8 3-8 3-8 3-10 3-10 3-11 3-12 3-15 3-15 3-21

Section 4 PERFORMANCE CHECK AND ' FUNCTIONAL VERIFICATION PROCEDURE

INTRODUCTION ..... .. .. .. .. ........... .. .. .. .. ....... 4-1 PREPARATION .. .. .. .. .. ........... .. .. .. .. ....... 4-1 INITIAL FRONT PANEL CONTROL SETUP ......... .. .. .. .. ........... .. . 4-4 VERTICAL SYSTEM ........... .. .... ............. .. . 4-5 TRIGGERING SYSTEM ...... .. .. .. .. ........... ... 4-16 HORIZONTAL SYSTEM ....... .. .. .. .............. 4-23 ADDITIONAL VERIFICATIONS AND CHECKS .. .. .. .. .. ........... .. .. .. .. ........... .. . 4-26

2430 Service

TABLE OF CONTENTS (cont)
Page Section 5 ADJUSTMENT PROCEDURE INTRODUCTION . .. .. .. .. ......... .. .. .. ... .. .. .. .. .... CALIBRATION SEQUENCE AND PARTIAL PROCEDURES .. ........... .. .. .. . WARM-UP TIME REQUIREMENT . .. .. . PRESERVATION OF INSTRUMENT CALIBRATION ....... .. .. .. .. ........... .. .. .. .. .... INTERNAL ADJUSTMENTS .. .. .. .. ... .. .. .. .. .. SELF CALIBRATION . .. .. .. .. ........... .. .. .. .. ..... EXTERNAL CALIBRATION . ......... .. .. .. .. .... Section 6 MAINTENANCE CALIBRATION IN THE 2430 DIGITAL OSCILLOSCOPE ....... .. .. .. .. .... NATIONAL BUREAU OF STANDARDS TRACEABILITY .. .. .. .. .... VOIDING CALIBRATION.. .. .. .. ......... .. .. . STATIC-SENSITIVE COMPONENTS . .. .... PREVENTIVE MAINTENANCE . ........... .. .. . 6-1 6-2 6-2 6-3 6-4 6-4 6-4 6-4 6-6 6-6 6-6 6-7 6-7 6-7 5-1 5-1 5-1 5-2 5-3 5-10 5-11 DIAGNOSTICS ....... .. .. .. .. ........... .. .. .. .. ........ CALIBRATION AND DIAGNOSTICS .. .. .. .. .. ........... .. .. .. .. ........ CALIBRATION/DIAGNOSTICS OPERATION . . ........... .. .. .. .. ........... .. .. .. .. . DIAGNOSTICS OPERATION VIA THE GPIB INTERFACE. .. .. .. .. ........ DIAGNOSTIC PROCEDURES . .. .. .. ...... Section 7 OPTIONS AND ACCESSORIES Page 6-25 6-25 6-30 6-32 6-32

1

GENERAL CARE .. .. .. ........... .. .. .. .. ......... INSPECTION AND CLEANING ....... .. .. . LUBRICATION.. .. .. .. .. ........... .. .. .. ..... .. .. .. SEMICONDUCTOR CHECKS.. .. .. .. .. .... PERIODIC READJUSTMENT ......... .. .. . TROUBLESHOOTING. .. ........... .. .. .. ..... .. .. .. INTRODUCTION . .. .. .. ........... .. .. .. .. ......... TROUBLESHOOTING AIDS . .. .. .. ......... TROUBLESHOOTING EQUIPMENT .. .. .. .. .. .. .. ..... .. .. .. .. ........... .. . 6-9 TROUBLESHOOTING TECHNIQUES .. .. .. ........... .. .. .. .. ........... .. . 6-9 CORRECTIVE MAINTENANCE ...... .. .. .. .. .. 6-11 6-11 MAINTENANCE PRECAUTIONS ......... 6-11 OBTAINING REPLACEMENT PARTS . .. .. ........... .. .. .. .. ........... . . .. .. .. ....... 6-11 SELECTABLE COMPONENTS .. .. .. .. .. .. 6-12 MAINTENANCE AIDS . .. ..... .. .. .. ......... .. . 6-12 6-14 TRANSISTORS AND INTEGRATED CIRCUITS . .. .. .. ........... .. . 6-14 SOLDERING TECHNIQUES .. ........... .. . 6-14 REMOVAL AND REPLACEMENT PROCEDURE . .. .. .. .. .. .. ....... .. .. ....... .. .. .. .. 6-15

INTRODUCTION. . . . . . . . . . .. . . . . . . . . . . . . . . .. . . .

OPTIONS DESCRIPTION .. ......... .. .. .. .. . OPTIONS A1-A5-INTERNATIONAL POWER CORDS .. ........... .. .. .. .. ... . .. ..... .. OPTION 1 R-RACKMOUNTED 2430 .. .. .. .. . .. .. .. .. .. .. .. .. ..... .. .. .. ......... .. .. .. .. . OPTION 05-VIDEO OPTION .... .. .. .. .. . OPTION 11-PROBE POWER ... .. .. .. .. . OPTIONAL WORD RECOGNIZER PROBE ACCESSORY..... .. .. .. .. ........... .. STANDARD ACCESSORIES .. ........... .. RACKMOUNTING ACCESSORIES ... .. OPTIONAL ACCESSORIES .. .. .. .. .. .. .. ...

7-1 7-1 7-1 7-1 7-2 7-2 7-2 7-2 7-2 1

01

Section 8 REPLACEABLE ELECTRICAL PARTS Section 9 DIAGRAMS

Section 10 REPLACEABLE MECHANICAL PARTS INDEX CHANGE INFORMATION

INTRODUCTION.. . . . .. . . . . . . . . . . . . . . .. . . . . . . INTERCONNECTIONS . . .. . . . . . . . . . . . . . . . .. . .

Diagnostic and Troubleshooting Information :

6-25 Diagnostics ............................ .......................... 6-30 Diagnostic Operation ...................................... 6-32 Diagnostic Procedures.................................... 6-35 2430 Troubleshooting Procedures Table ...... 6-99 Video Option Troubleshooting Table ...:........ Troubleshooting Charts .................................. Section 9

1 1 1

REV DEC 1986

2430 Service

LIST OF ILLUSTRATIONS
Figure The 2430 Digital Oscilloscope ..... .. .. .. .. ........... .. .. .. .. ........... . . .. .. ..... .. .. ................. .. ........... .. .. .. .. ..... 1-1 2-1 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14 3-15 3-16 5-1 5-2 5-3 Dimensional drawing .. .. ..... .. .. .. ........... .. .. .. .. ... ........ .. .. .. ............. .. ....... .. .. .. .... ....... .. .. .. .. ........... . Page viii

. 1-20 2-1 3-3 3-18 3-35 3-45 3-47 3-51 3-55 3-69 3-71 3-76 3-79 3-80 3-85 3-86 3-92 3-94 5-4 5-5 5-6

LINE VOLTAGE SELECTOR, line fuse, and power cord receptacle .. .. .. .. ........... .. .. .. .. ........... .. . 2430 simplified block diagram ... .. ....... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... . . .. .. .. ........... .. .. .. .. ..... Simplified Memory Map of the 2430 . .. ........... .. .. .. ............. .. .. .. ....... .. .. ...... . . .. . ...... .... ....... .. .. .. .. .. .. . System Clock waveforms . .. .. .. ........... .. .. .. ......... ........... . . . . . . . . ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. Simplified Peak Detector block diagram ........ .. .. .. .. ........... .. .. .. .. ........... .. .. .... ........... .. .... ....... ...... . Simplified CCD architecture .. .. ........... .. .. .. .. ........... .. .. ............... ......... .. .. .. .. ......... .. .. .. .. ............. .. .. Trigger Logic Array Control Data Byte .......... .. .. .. .. ..... . .... . . . .... ........... ................. ........... .... .. .. .. ... Jitter correction waveforms. .. .. ........... .. .. .. .. ..... .. . ... .. .. .. .. ........... .. .. ......... .... .. .. .. ......... .... .. .. .. ......... Readout State Machine flow chart ...... .. .. .. ........... .. .. .. . . ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ..... Vertical Vector Generator . ....... .. .. .. .......... . . . .. .. .. ........... .. .. .. .. ........... .. .. ............... .. .. ............. .. .. .. .. . DC Restorer ...... ........... .. .. .. ........... .. .. .. .. ........... . . .. ........ ... ........... .. .. ................. .. .... ... .. .. .. .. ... ......... .. .. .. .. ........... .. .. .. ......... .. ..................... ........... .. .. .... ...... GPIB data flow diagram ......... .. .. .. .. .. GPIB three-wire handshake state diagram ... .. ............. .. .. .. ......... .. .. ........... .. .. .. .. ........... .. .. .. .. ..... Video Option waveforms ........ .. .. .. .. ........... .. .. .. ............. ........... .. .. ........... .. .. .. .. ....... .... .. .. .. .. .......... Video Option field-sync identification . .. .. .. .. ........... .. .. .... ........... ........... .. .. .. .. ........... .. .. ............... .. PWM Regulator and Inverter . .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........ ... .. .. ............... .. .. ............... .. .. .. PWM switching waveforms.... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........ ... .. .. ............... .. .. .. ............. .. .. .. Adjustment locations for Displays 4 through 6 .. .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ....... Display 5-Vertical and Horizontal Gain, Offset, and Vector Compensation adjustment pattern ......... .. .. .. .. ........... .. .. .. .. ........... . .................. .. .. .. .. ........... .. .. .. .. Display 6-Integrator Time adjustment pattern . .. .. .. .. ........... .. .. ........... .... .. .. .. .. ........... .. .. .... ....... Multipin connector .. .. ......... .. .. .. ...... . . ... .. .. .. .. ........... .. .. .. .. ............. .. .. .. ........... .. .. .. .. ...... ..... .. .. .. .. ..... 2430 circuit boards ... .. .. .. .. ........ . ........... .... .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ... ............ ........ . Installation sequence for installing the crt frame screws . .. .. ......... .. .. ........ ........... .. .. .. .. ........... .. Main EXT DIAG menu .. .. ... .. .. .. .. ......... .. .. .. .. ........... .. .. .. .. ........... .. .. .. :. ...... ..... .. .. .. .. ........... .. .. .. .. .. .. . Trigger LED binary coding for diagnostic tests .. .. . ............... .. .. ............... .. .. .. .. ........... .. .. .. .. ....... Initial troubleshooting chart ......... .. .. .. .. ........... .. .. .. ............. .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... . Mux Test waveforms ...... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .... ........... .. .. .. .. ........... .. .. .. .. ..... Typical Register test waveforms .. .. .. .. ........... .. .. .. .. ........ ... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ............ Front Panel uP diagnostics test .. .... .. .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... . System AP data bit D7 in the Bus Isolate mode ....... .. .. .. .. ........... .. .. .. .. ........ ........... .. .. ...............

6-1 6-2 6-3 6-4 6-5 6-6 6-7 6-8 6-9 6-10

6-8 6-16 6-23 6-27 6-28 6-34 6-39 6-51 6-75 6-97

2430 Service

LIST OF ILLUSTRATIONS (cont)

Figure 9-1 9-2 9-3 9-4a 9-4b 9-5 9-6 9-7 9-8 9-9 9-10 9-11 Color codes for resistors and capacitors . Semiconductor lead configurations . Locating components on schematic diagrams and circuit board illustrations . Detailed 2430 Block Diagram. Detailed 2430 Block Diagram (cont) . A12-Processor Board. A13-Side Board. A14-Front Panel Board. A10-Main Board. All -Timebase/Display Board. A17-High Voltage Board. A16-Low Voltage Power Supply Board.

2430 Service

LIST OF TABLES

Table 1-1 1-2 1-3 1-4 2-1 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 4-1 4-2 4-3 4-4 6-1 6-2 6-3 6-4 6-5 6-6 6-7 6-8 ....... .. .. .. .. ........... .. .. . Electrical Characteristics ........... .. .. ....... .. .. ........... .. .. .. .. ........... .. .. .. ....... . Environmental Characteristics ..... .. .. .. ........... .. .. .. .. ..... .. ............. .. .. .. ........... .. .. .. .. ........... .. .. .. .. .... Mechanical Characteristics ........ .. .. .. .. ....... ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. ......... .. .............. Option 05 (TV Trigger) Electrical Characteristics ..... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. . Voltage, Fuse, and Power-Cord Data . ......... .. .. .. .. ........... .. .. .. .. ........... .. ........... .. ........... .. . . . . .. .... Host Memory-Mapped I/0 ......... ......... .. .. .. ........... .. .. .. .................. . . .. .. .. .. ........... .. .. .. .. ........... .. .. . Processor Control Register Functions ......... .. .. .. .. ........... .. .. .. ....... .. ........... .. .. .. .. ........... .. .. .. .. .... Processor Miscellaneous Register (PMREG) Output Functions.. ........... .. .. .. .. ........... .. .. .. .. ...... Waveform jP Address Decoding . .. ......... .. . . .. ....... .. .. .. .. ........... .. ........... .. ........... .. .. .. .. ........... .. .. . Trigger Logic Array Addresses (6080h-6087h) ...... ......... .. .. .. .. ........... .. .. .. .. ......... .... ............. .... REF4/5 Frequency for Each SEC/DIV Setting ..... ........... .. .. .. .. ........... .. .. .. ........... ............. .. .. .... Phase Clock Array Control Lines (CC3 through CCO) . .. ............. .. ......... .. .. ........... .. .. .... ........... Holdoff Delay Range for Current Source vs Charging Capacitor Combinations ..... .. .. .. .. ........... .. .. ..... .... .. ........... .. .. .. .. ....... ............. .. .. .. ........... .. .. .. .. ........... .. .. .. .. .. Side Board Address Decoding ......... .. .. .. .. ........... .. .. ....... .. .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. . Test Equipment Required .. .. .. ........... .. .. .. .. ....... ........... .. .. .. .. ........... .. .. .. .. ........... .. .. ............. ....... Accuracy Limits CH 1 and CH 2 CURSOR VOLTS Readout and A and B TRIGGER LEVEL Readouts .. ......... .. .. .. ........... .. .. ............................ .. ........... .. .. . . .. . .. . ....... .. .. . Minimum Display Level for CH 1 or CH 2 Triggering .. .. .. ........... .. .. .. .. ........... .... ............... .. ..... Minimum Signal Level for EXT1 or EXT2 Triggering . .. .. .. ........... .. .. .. .. ........... .. .. .. ............. .. .. ...

Page 1-3 1-15 1-17 1-18 2-2 3-19 3-20 3-21 3-25 3-50 3-52 3-53 3-57 3-59 4-2 4-8 4-17 4-19

6-3 Relative Susceptibility to Static-Discharge Damage .. .. .. ............... ............. ............... .. .. ........... .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. .... 6-5 External Inspection Check List .. .. ........... .. ........... .. .. .. . ... .. . . .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. ............. .. ...... .... 6-6 Internal Inspection Check List ... .. ... Ripple Limits ....... .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... 6-10 Power Supply Voltage and Maintenance Aids .......... .. .. .. .. ....... ........... .. .. .. .. ........... .. .. .. .. ........... .. .... ............. ................... .. .. . 6-13 2430 Troubleshooting Procedures ................ .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. .. ........... 6-35 Video Option Troubleshooting ... .. .. ......... .. ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. ............. . . .. .... 6-99 INIT PANEL States ........ .. .. .. .. ....... ........... .. .. .. .. ........... .. .. .. .. ........... .. .. .. ............. .. .. .. ............. .. . . . 6-103

2430 Service

OPERATORS SAFETY SUMMARY
The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnings and cautions will be found throughout the manual where they apply and do not appear in this summary.

Terms in This Manual CAUTION statements identify conditions or practices that could result in damage to the equipment or other property. WARNING statements identify conditions or practices that could result in personal injury or loss of life. Terms as Marked on Equipment

Grounding the Product

This product is grounded through the grounding conductor of the power cord . To avoid electrical shock, plug the power cord into a properly wired receptacle before making any connections to the product input or output terminals. A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation. Danger Arising from Loss of Ground

CAUTION indicates a personal injury hazard not immediately accessible as one reads the markings, or a hazard to property, including the equipment itself . DANGER indicates a personal injury hazard immediately accessible as one reads the marking. Symbols in This Manual

Upon loss of the protective-ground connection, all accessible conductive parts (including knobs and controls that may appear to be insulated) can render an electric shock . Use the Proper Power Cord

This symbol indicates where applicable cautionary or other information is to be found. For maximum input voltage see Table 1-1 .

Use only the power cord and connector specified for the instrument . Use the Proper Fuse

Symbols as Marked on Equipment DANGER - High voltage. Protective gound (earth) terminal . ATTENTION - Refer to manual . Power Source

To avoid fire hazard, use only the fuse specified in the instrument parts list. A replacement fuse must meet the type, voltage rating, and current rating specifications for the fuse that it replaces. Do Not Operate in Explosive Atmospheres To avoid explosion, do not operate this instrument in an atmosphere of explosive gasses . Do Not Remove Covers or Panels To avoid personal injury, the instrument covers or panels should only be removed by qualified service personnel. Do not operate the instrument without covers and panels properly installed.

This product is intended to operate from a power source that will not apply more than 250 volts rms between the supply conductors or between either supply conductor and ground . A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation.

2430 Service

SERVICING SAFETY SUMMARY
FOR QUALIFIED SERVICE PERSONNEL ONLY Refer also to the preceding Operators Safety Summary.
Do Not Service Alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present. Use Care When Servicing With Power On Dangerous voltages exist at several points in this product. To avoid personal injury, do not touch exposed connections or components while power is on . Disconnect power before removing protective panels, soldering, or replacing components . Power Source

This product is intended to operate from a power source that does not apply more than 250 volts rms bwetween the supply conductors or between either supply conductor and ground . A protective ground connection by way of the grounding connector in the power cord is essential for safe operation.

2430 Service

4917-0 1

The 2430 Digital Oscilloscope .

Viii

Section 1-2430 Service

SPECIFICATION
INTRODUCTION
The TEKTRONIX 2430 Digital Oscilloscope is a portable, dual-channel instrument with a maximum digitizing rate of 100 megasamples per second . The instrument is microprocessor controlled, menu driven, and displays crt readouts of the vertical and horizontal scale factors, trigger levels, trigger source, and cursor measurements . Menu-driven modes of the instrument are selected by pressing a bezel button under the menu choices displayed at the bottom of the crt. Selection of a mode is indicated by an underscoring of the menu choice in the display. The menus, system operating modes, and auxiliary functions are described in Section 3 of the Operators Manual, "Controls, Connectors, and Indicators ." The 2430 is capable of simultaneous acquisition of the Channel 1 and Channel 2 input signals . It has a real-time useful storage bandwidth of 40 MHz for single-event acquisitions and an equivalent-time bandwidth of 150 MHz for repetitive acquisitions . Since both channels are acquired simultaneously, the XY display is available to full bandwidth. The two vertical channels have calibrated deflection factors from 2 mV to 5 V per division in a 1-2-5 sequence of 14 steps. Use of coded probes having attenuation factors of 1X, 10X, 100X, and 1000X extends the minimum sensitivity to 5,000 V per division (with the 1000X probe) and the maximum sensitivity to 200 AV per division (using a 1 X probe in SAVE or AVERAGE expanded mode). VOLTS/DIV readouts are automatically switched to display a correct scale factor when properly coded probes are attached . Horizontal Display Modes of A, A INTEN, and B Delayed are available. Two types of delay operation are available: B Delayed by Time and A Delayed by Events . The time base has 28 calibrated SEC/DIV settings in a 12-5 sequence from 5 ns per division to 5 s per division . An External Clock Mode is provided that accepts clocking signals from 1 MHz to 100 MHz. A choice of VERT, CH1 or CH2, EXT1 or EXT2, LINE, and A" B or WORD (16-bit data word recognition) for the A Trigger signal SOURCE provides a wide range of specialized triggering capabilities . The B Trigger SOURCE choices are similar to the A Trigger SOURCE, but exclude A"B (A and B both) and LINE (power-source frequency) . Trigger CPLG selections are AC, DC, HF REJ, LF REJ, and NOISE REJ . The Trigger LEVEL control amplitude setting is displayed in the crt readout. The Video Option adds a CPLG selection of TV that processes applied composite video signals for stable triggering . With the Video Option Installed, the Trigger LEVEL control becomes the TV LINE number selector for FLD1 and FLD2 triggering . Trigger MODE choices are AUTO LEVEL, AUTO (ROLL), NORM, and SINGLE SEQ (single sequence) for the A and A INTEN Horizontal Modes. Triggerable After Delay and Runs After Delay are provided for the B Horizontal Mode . AUTO LEVEL provides for automatic triggering on the applied trigger signal . AUTO Mode produces an auto trigger if a trigger signal is either not received within a defined time or is inadequate to produce a triggering event. When triggering conditions are met, normal triggering occurs . At SEC/DIV settings of 100 ms per division and slower, AUTO Mode becomes ROLL Mode. NORM (normal) Mode requires that the triggering signal meet all the triggering requirements before an acquisition trigger will be generated. In SINGLE SEQ Mode, a single complete acquisition is done on all called,-up VERTICAL MODES, and the 2430 switches to the SAVE Mode . The amount of pretrigger data displayed is selectable by choosing the trigger point position within the waveform record . Five pretrigger lengths are selectable, beginning at one-eighth of the record length and increasing to seveneighths of the record length . Trigger position is independently selectable for the A and B acquisitions . Additional trigger positions within the record are selectable via the GPIB interface commands . The record length of acquired waveforms is 1024 data points (512 max/min pairs in ENVELOPE Mode), of which 500, make up a one-screen display (50 data points per division for 10 divisions) . The entire record may be viewed by using the Horizontal POSITION control to position any portion of the record within the viewing area. Waveforms may be acquired in NORMAL, ENVELOPE, and AVG (averaging) Modes. NORMAL Mode provides a continuous acquisition display similar to that seen with an analog oscilloscope . AVG (averaging) Mode is especially useful for improving the signal-to-noise ratio of the displayed waveform by averaging from 2 to 256 acquisitions to remove uncorrelated noise. REPETITIVE Mode

Specification-2430 Service may be used in NORMAL and AVG Modes for equivalenttime sampling that extends the useful storage bandwidth to 150 MHz for recurring periodic signals. The ENVELOPE Mode display presents a visual image of the amount of change (envelope) that occurs to a waveshape during the acquisition of from 1 to 256 waveforms . The continuous ENVELOPE Mode holds all changes in the display until reset by a control change . ENVELOPE Mode can capture single-event pulses (glitches) as narrow as 4 ns at the slowest SEC/DIV setting of 5 seconds per division . Acquired waveforms may be saved in any of four REF waveform nonvolatile memories . Any or all of the saved reference waveforms may be displayed for comparison with the waveforms being currently acquired . The source and destination of waveforms to be saved may be user designated . Up to five front-panel control setups may be saved (when REF4 is designated for front-panel memory) in nonvolatile memory for recall at a later time . Time and Voltage cursors are provided for making measurements on the displayed waveforms. Direct readout of the measured values are displayed on the crt. The cursors have alternate modes of readout operation for a choice of measurement types (i .e ., volts at time, slope, frequency, absolute, dB, percent, degrees of phase, and delta measurements) . The 2430 has full TALKER/LISTENER GPIB capabilities that make the instrument ideal for making automated measurements in an installed system and a standard X-Y Recorder output for producing low-cost hard copies of acquired waveforms. The GPIB interface may also be used to drive a ThinkJeto printer to plot the acquired waveforms. The following items are standard accessories shipped with the 2430 instrument : 2 Probe packages For part numbers and further information about standard accessories and a list of the optional accessories, refer to "Options and Accessories" (Section 7) either in this manual or in the Operators Manual . For additional information on accessories and ordering assistance, contact your Tektronix representative or local Tektronix Field Office.

PERFORMANCE CONDITIONS
The following electrical characteristics (Table 1-1) apply when the 2430 has been calibrated at an ambient temperature between +20°C and +30°C, has had a warmup period of at least 20 minutes and is operating at an ambient temperature between -15°C and +55°C (unless otherwise noted) . Items listed in the "Performance Requirements" column are verifiable quantitative or qualitative limits that define the measurement capabilities of the 2430 Oscilloscope . For optimum performance to specification, the 2430 SELF CAL may be done : 1 . If the operating temperature has changed by more than 5°C since the last SELF CAL was done . 2 . Immediately before making measurements requiring the highest degree of accuracy. A complete adjustment procedure that includes the EXTENDED CAL and all the internal 2430 adjustments should normally be done after 2000 hours of operation or at one-year intervals if used infrequently . Environmental Characteristics are given in Table 1-2. The 2430 meets the environmental requirements of MILT-288000 for Type 111, Class 3, Style D equipment, with the humidity and temperature requirements defined in paragraphs 3.9 .2 .2, 3.9.2 .3, and 3.9 .2.4 . The rackmounted 2430 meets the vibration and shock requirements of MILT-288000 for Type 111, Class 5, Style D equipment when mounted using the rackmount rear-support kit supplied with both the 1111 Option and the Rackmount Conversion kit. Mechanical characteristics of the 2430 are listed in Table 1-3. Video Option characteristics are given in Table 1-4.

1 Snap-lock accessories pouch 1 Zip-lock accessories pouch

1 Operators manual 1 Instrument Interface Guide 1 User Reference Guide

1 Fuse 1 Power cord (installed) 1 Blue plastic crt filter (installed) 1 Clear plastic crt filter 1 Front-panel cover

Specification-2430 Service Table 1-1 Electrical Characteristics Characteristics Performance Requirements

ACQUISI TION SYSTEM-CHANNEL 1 AND CHANNEL 2 Resolution 8 bits .a Displayed vertically with 25 digitization levels (DL)b per division, 10 .24 divisions dynamic range.a Displayed horizontally with 50 samples per division, 20 .48-division trace length .a 10 samples per second to 100 megasamples per second (5 s per division to 500 ns per division). 80 AV per DL to 0.2 V per DL in a 1-2-5 sequence of 11 steps (2 mV per division to 5 V per division). Within ± (2% + 1 DL) at any VOLTS/DIV setting for a signal 1 kHz or less contained within ±75 DL (±3 divisions) of center when an Autocal has been performed within ±15 0C of the operating temperature. Measured on a four- or five-division signal with VOLTS or V@T cursors ; UNITS set to delta volts. Add 1% to Normal Mode specifications . Continuously variable between VOLTS/DIV settings . Extends sensitivity to 0.5 V per DL or greater, 12 .5 V per division or greater . DC to 40 MHz (calculated useful storage bandwidth-USB) .a (sample freq max) USB = F 2.5 DC to 150 MHz. Bandwidth with a P6131 probe is checked using the obtainable reference signal (six divisions or less) from a terminated 50 U system via probe-tip-to-BNC adapter.a Bandwidth with external termination is checked using a sixdivision reference signal from terminated 50 SZ system .a Bandwidth with internal termination is checked using a six-division reference signal from a terminated 50 U system . 1024 samples.a

Record Length

Sample Rate Sensitivity Range Accuracy Normal and Average Modes

_

Envelope Mode

Variable Range Bandwidth

Normal and Average Mode ; Repet off; SEC/DIV at 0.5 As or Faster

Normal and Average Modes with Repet On or Continuous Envelope Mode ; SEC/DIV at 0.2 As or Faster (-3 dB bandwidth)

"Performance Requirement not checked in the manual. n"Digitization level" is abbreviated "DL" and is equal to 1/25 of a division times the vertical expansion factor.

Specification-2430 Service Table 1-1 (cont) Characteristics AC Coupled Lower -3 dB Point 1 X Probe 10 Hz or less .a 1 Hz or less .a 10X Probe Step Response, Repet and Average On ; Average Set to 16 Rise Time 2.3 ns or less (calculated) .a Tr (in ns) = Envelope Mode Pulse Response 350 BW (in MHz) Performance Requirements

Minimum Single Pulse Width for 50% or Greater Amplitude Capture at 85% or Greater Confidence Minimum Single Pulse Width for Guaranteed 50% or Greater Amplitude Capture Minimum Single Pulse Width for Guaranteed 80% or Greater Amplitude Capture

2 ns .a

4 ns .a 8 ns .a 100 :1 or greater attenuation of the deselected channel at 100 MHz; 50 :1 or greater attenuation at 150 MHz, for a 10division input signal from 2 mV/div to 500 mV/div ; with equal VOLTS/DIV settings on both channels. t 250 ps .a

Channel Isolation

Acquired Channel 2 Signal Delay with Respect to Channel 1 Signal at Full Bandwidth Input R and C (1 MS2) Resistance

In each attenuator, the input resistance of all VOLTS/DIV positions is matched to within 0.5%.a Capacitance In each attenuator, the input capacitance of all VOLTS/DIV positions is matched to within 0.5 pF .a "Performance Requirement not checked in the manual . 15 pF t2 pF.a

1 MSZ ±0 .5%.a

Specification-2430 Service Table 1-1 (cont) Characteristics Input R (50 0) Resistance VSWR (DC to 150 MHz) Maximum Input Voltage Maximum Input Voltages Input Coupling Set to DC, AC, or GND Common-Mode Rejection Ratio (CMRR) ; ADD Mode with Either Channel Inverted POSITION Range t(9 .6 to 10.7) divisions t 0.4, t 0.7 div. At 50 mV per division with INVERT off, when Self Cal has been done within ±5°C of the operating temperature. t3 DLs for positions within t5 divisions from center. 400 V (dc + peak ac); 800 V p-p ac at 10 kHz or less.a At least 10 :1 at 50 MHz for common-mode signals of 10 divisions or less with VARIABLE VOLTS/DIV adjusted for best CMRR at 50 kHz. Performance Requirements

50 0; ±1%.8 1 .3:1 or better .a 5 V rms; 0.5 W-sec for any one-second interval for instantaneous voltages from 5 V to 50 V.

Gain Match Between NORMAL and SAVE Low-Frequency Linearity Normal or Average Mode

3 DLs or less compression or expansion of a two-division, center-screen signal when positioned anywhere within the acquisition window .

20 MHz Bandwidth Limiter -3 dB Bandwidth 50 MHz Bandwidth Limiter -3 dB Bandwidth Rise Time 40 MHz to 55 MHz. 6.3 ns to 8.7 ns .e With a five-division, fast-rise step (rise time of 300 ps or less) using 50 0 do input coupling and VOLTS/DIV setting of 10 mVa 13 MHz to 24 MHz.

°Performance Requirement not checked in the manual.

REV DEC 1986

1-5

Specification-2430 Service Table 1-1 (cont) Characteristics TRIGGERING-A AND S Minimum P-P Signal Amplitude for Stable Triggering from Channel 1, Channel 2, or ADD A Trigger DC Coupled NOISE REJ Coupled AC Coupled ~0.35 division from DC to 50 MHz, increasing to 1 .0 division at 150 M Hz ; 1 .5 divisions at 150 M Hz in ADD mode . 1 .2 divisions or less from DC to 50 MHz, increasing to 3 divisions at 150 MHz; 4.5 division s at 150 MHz in ADD mode . 0.35 division from 60 Hz to 50 MHz; increasing to 1 .0 division at 150 MHz, 1 .5 divisions at 150 MHz in ADD mode . Attenuates signals below 60 Hz . 0.50 division from DC to 30 kHz. Attenuates signals above 30 kHz. 0.50 division from 80 kHz to 50 MHz; increasing to 1 .0 division at 150 MHz; 1 .5 divisions at 150 MHz in ADD mode . Attenuates signal below 80 kHz. Multiply all A Trigger specifications by two. Multiply all A Trigger specifications by two. Performance Requirements

1 1 1 1 1 1 1 1 1 1 1

HF REJ Coupled LF REJ Coupled

B Trigger A- B Selected Minimum P-P Signal Amplitude for Stable Triggering from EXT TRIG 1 or EXT TRIG 2 Source A Trigger EXT Gain = 1 DC Coupled NOISE REJ Coupled AC Coupled HF REJ Coupled LF REJ Coupled EXT Gain = =5 B Trig ger A"B Selected Maximum P-P Signal Rejected by NOISE REJ Coupling Signals within the Vertical Bandwidth Channel 1 or Channel 2 Source

17 .5 mV from DC to 50 MHz, increasing to 50 mV at 150 MHz. 60 mV or less from DC to 50 MHz; increasing to 150 mV at 150 MHz. 17 .5 mV from 60 Hz to 50 MHz; increasing to 50 mV at 150 MHz. Attenuates signals below 60 Hz . 25 mV from DC to 30 kHz. 25 mV from 80 kHz to 50 MHz; increasing to 50 mV at 150 MHz. Amp litudes are five times th ose specified for Ex t Gain = 1 . Multiply all A Trig ger amplitude specifications by two. Multiply all A Trigger amplitude specifications by two.

0.4 division or greater for VOLTS/DIV settings of 10 mV and higher . Maximum noise rejected is reduced at 2 mV per division and 5 mV per division .

EXT TRIG 1 or EXT TRIG 2 Source

20 mV or greater when Ext Trig Gain = 1 . 100 mV or greater when Ext Trig Gain = -- 5 .

Specification-2430 Service Table 1-1 (cont) Characteristics EXT TRIG 1 and EXT TRIG 2 Inputs Resistance _Capacitance Maximum Input Voltage LEVEL Control Range Channel 1 or Channel 2 Source EXT TRIG 1 or EXT TRIG 2 Source EXT GAIN = 1 EXT GAIN = =5 LEVEL Readout Accuracy (for triggering signals with transition times greater than 20 ns) Channel 1 or Channel 2 Source DC Coupled +15°C to +35°C Within ± [3% of setting + 3% of p-p signal + (0 .2 division X VOLTS/DIV setting) + 0.5 mV + (0 .5 mV X probe attenuation factor)] . Add (1 .5 mV specification .a x probe attenuation) to +15°C to +35°C ±0 .9 volt .a ±4 .5 volts.a 1 MU ± 1 %.a 15 pF ±3 pF .a 400 V (dc + peak ac); 800 V p-p ac at 10 kHz or less .a ± 18 divisions X VOLTS/DIV setting .a Performance Requirements

-15°C to +55°C (excluding +15°C to +3 5°C) NOISE REJ Coupled

Add ± (0 .6 division specifications .

X VOLTS/DIV setting) to DC Coupled

Checked at 50 mV per division . EXT TRIG 1 or EXT TRIG 2 Source EXT GAIN = 1 DC Coupled NOISE REJ Coupled EXT GAIN - =5 DC Coupled NOISE REJ Coupled °Performance Requirement not checked in manual . Within ± [3% of setting + 4% of p-p signal + 50 my + (0 .5 mV X probe attenuation factor)] . Add ± 150 mV to DC Coupled specifications . Within ± [3% of setting + 4% of p-p signal + 10 mV + (0 .5 mV X probe attenuation factor)] . Add ±30 mV to DC Coupled specifications .

Specification-2430 Service Table 1-1 (cont) Characteristics Variable A Trigger Holdoff A SEC/DIV8 5 10 20 50 100 200 ns ns ns ns ns ns Performance Requirements

MIN H08
2-4 As

MAX HOa
9-15 As

500 ns 2 As 5 As 10 As 20 As 50 As 100 As 200 As 500 As 1 ms 2 ms 5 ms 10 ms 20 ms 50 ms 100 ms 200 ms 500 ms 1s 2s 5s SLOPE Selection Trigger Position Jitter (p-p) SEC/DIV 0.5 As per Division or Greater A and B Triggered Sweeps B RUNS AFTER Delay SEC/DIV 0.2 As per Division or Less 0.04 X SEC/DIV setting.a 0.08 X SEC/DIV setting.a Conforms to waveform . trigger-source
1 As

5-10 As 10-20 As 20-40 As 50-100 ws 0.1-0 .2 ms 0.2-0 .4 ms 0.5-1 .0 ms 1-2 ms 2-4 ms 5-10 ms 10-20 ms 20-40 ms 50-100 ms 0.1-0 .2s 0.2-0 .4s 0.5-1 .0s 1-2s 2-4s 9-15s 5-10s waveform and ac-power-source 100-150 As

1-1 .5 ms

10-15 ms

90-150 ms

0.9-1 .5s

(0 .02 X SEC/DIV setting) + 2 ns .a

Checked at 5 ns/div with Repet OFF using a six-division, 10 MHz sine-wave input.a

°Performance Requirement not checked in the manual .

Specification-2430 Service Table 1-1 (cont) Characteristics TIME BASE Sample Rate Accuracy External Clock Repetition Rate Minimum Maximum Events Count Events Maximum Repetition Rate Signal Levels Required for EXT Clock or EVENTS Channel 1 or Channel 2 SOURCE DC Coupled NOISE REJ Coupled AC Coupled 0.7 division from DC to 20 MHz; increasing to 2.0 divisions at 100 MHz ; 3.0 divisions at 100 MHz in ADD mode .a 2.4 divisions or less from DC to 20 MHz; increasing to 6.0 divisions at 100 MHz; 9.0 divisions at 100 MHz in ADD mode .a 0.7 division from 60 Hz to 20 MHz; increasing to 2.0 divisions at 100 MHz ; 3.0 divisions at 100 MHz in ADD mode. Attenuates signals below 60 Hz .a 2.0 divisions from DC to 30 kHz. Attenuates signals above 30 kHz.a 2.0 divisions from 80 kHz to 20 MHz; increasing to 4.0 divisions at 100 MHz; 3.0 divisions at 100 MHz in ADD mode . Attenuates signals below 80 kHz.a 1 MHz.a 100 MHz.a 1 to 65,536a 100 MHz.a Average Over 100 or More Samples ±0 .01% .a Performance Requirements

HF REJ Coupled LF REJ Coupled

EXT TRIG 1 or EXT TRIG 2 Source Ext Gain = 1 _ Coupled DC NOISE REJ Coupled AC Coupled HF REJ Coupled LF REJ Coupled Ext Gain = _ 5 Delay Time Range Delay Time Accuracy Delay Time Resolution OPerformance Requirement not checked in the manual . 35 mV from DC to 20 MHz ; increasing to 100 mV at 100 MHz.a 120 mV or less from DC to 20 MHz; increasing to 300 mV at 100 MHz.a 35 mV from 60 Hz to 20 MHz; increasing to 100 mV at 100 MHz. Attenuates signals below 60 Hz .a 50 mV from DC to 30 kHz.a 50 mV from 80 kHz to 20 MHz; increasing to 100 mV at 100 MHz.a . Amplitudes are five times those specified fo r Ext Ga in = 1 .a (0 .04 X B SEC/DIV) to (65,536 X 0.04 X B SEC/DIV).a Same as th e sample rate accuracy.a The greater of (0 .04 X B SEC/DIV) or 20 ns .

Specification-2430 Service Table 1-1 (cont) Characteristics NONVOLATILE MEMORY Last and Recall Setup 1 Front-Panel Settings and Calibration Constants Retention Time Waveform Data and Recall Front-Panel Settings 2 through 5 Retention Time Storage Temperature 25°C 50°C Battery Greater than 120 hours.a Greater than 24 hours.a 3.5-volt lithium thionyl chloride ; Type LTC-7P ; UL listed .a WARNING To avoid personal injury, observe proper procedures for handling and disposal of lithium batteries. Improper handling may cause fire, explosion, or severe burns. Don't recharge, crush, disassemble, heat the battery above 212°F (100°C), incinerate, or expose contents of the battery to water. Dispose of battery in accordance with local, state, and national regulations. Greater than 3 years.a Performance Requirements

Larger quantities must be sent by surface transport to a hazardous waste disposal facility. The batteries should be individually packaged to prevent shorting and packed in a sturdy container that is clearly labeled "Lithium Batteries-DO NOT OPEN. " °Performance Requirement not checked in the manual.

Typically, small quantities (less than 20) can be safely disposed of with ordinary garbage in a sanitary landfill.

Specification-2430 Service Table 1-1 (cont) Performance Requirements SIGNAL OUTPUTS CALIBRATOR Voltage (with A SEC/DIV switch set to 1 ms) 1 MSt Load 50 0 Load Current (short circuit load with A SEC/DIV switch set to 1 ms) Repetition Period CALIBRATOR output amplitudes at 5 MHz are at least 50% of output amplitudes at 1 ms SEC/DIV setting.a

0.4 V ± 1 %.a 0.2 V t 1 .5%.a 8 mA ± 1 .5%.a A SEC/DIV Setting' 5 10 20 50 100 200 ns ns ns ns ns ns Calibrator Frequency' Calibrator Period° Div/ Cycle" 40 20 10 4 2 1 4 2 4 2 1 4 2 1 4 2 1 4 2 0.4 0.2 0.1 0.04 0.02 0.01 0.004

5 MHz

200 ns

500 ns 1 AS 5 As 10 As 20 AS 50 100 As 200 As 500 As 1 ms 2 ms 5 ms 10 ms 20 ms 50 ms 100 ms 200 ms 500 ms 1 s 2s . ~5 s Accuracy _ ±0 .01% .a
AS

500 kHz 50 kHz

2 As 20 As

5 kHz

200 As

500 Hz

2 ms

50 Hz

20 ms

0

.

Symmetry

Duration of high portion of output cycle is 50% of output period t (lesser of 500 ns or 25% of period).a

Performance Requirement not checked in the manual .

Specification-2430 Service Table 1-1 (cont) Characteristics CH 2 SIGNAL OUTPUT Output Voltage 20 mV per division ± 10% into 1 MO . 1 0 mV per divison ± 10% into 5012 . ± 10 mV into 50 S2, when do balance has been performed within ±5°C of the operating temperature. DC to greater than 50 MHz. Performance Requirements

Offset -3 dB Bandwidth A TRIGGER, RECORD TRIGGER, and WORD RECOGNIZER Output Logic Polarity Output Voltage HI Load of 400 AA or Less 50 SE Load to Ground Output Voltage LO Load of 4 mA or Less

Negative true . Trigger occurrence indicated by a HI to LO transition ." 2.5 V to 3.5 V.a 0.45 V or greater." 0.5 V or less ." 0.1 5 V or le ss ." _

50 IZ Load to Ground PLOTTER X-Output and Y-Output Output Resis tance Output Range

1 kO ± 10%. ± (2 V ± 100 mV). Scale Factors Y-390 mV per division ; X-390 mV per division .

Output Center Home (Lower Left) Positi on Slew Rate

0 volts ±30 mV . Less than 8 volts per second ." -2 V ± 100, mV .

_ Pen Lift, SPST Relay Contact to Ground Polarity

The instantaneous slew rate is determined by the output stage time constant (3 .3 ms) and can exceed 8 volts per second . The System AP computes the length of the stroke needed for each point and waits an appropriate time at each position before proceeding . so that the X-Y plotter sees an effective slew rate of less than 8 volts per second ." Menu selectable ." ±25 volts ." 1 IZ or less ." 250 mA or less ."

Maximum Applied Open-Circuit Voltage Maximum Closed-Circui t Resistanc e Maximum Closed-Circuit Current "Performance Requirement not checked in the manual.

Specification-2430 Service Table 1-1 (cont) Characteristics DISPLAY Graticule Phosphor Nominal Accelerating Potential Waveform and Cursor Display, Vertical Resolution, Electrical 80 mm X 100 mm (8 X 10 divisions) .a P31 .a 16 kV .a One part in 1024 (10 bit) . Calibrated for 100 points per division .a Graticule indication of voltage cursor difference is within 1% of CRT cursor readout value, meas ured over center 6 divisions . Within ±0 .1 division . Less than 0 .05 division . Performance Requirements

1 1 1 1 1 1 1 1

Gain Accuracy Centering; Vectors OFF Offset with Vectors ON Linearity - __ Vector Response NORMAL Mode Step Aberration Fill ENVELOPE Mode Fill Waveform and Cursor Display, Horizontal Resolution, Electrical Gain Accuracy Centering; Vectors OFF Linearity °Performance Requirement not checked in the manual.

Less than 0.1 division difference between graticule indication and crt cursor readout when active volts cursor is positioned anywhere on screen and inactive cursor is at center screen .a

l ie

+4%, -4%,4% p-p.

-,

Edges of filled regions match reference lines within ±0 .1 division . Less than 1 % change in p-p amplitude of a 6-division, filled ENVELOPE waveform when switching vectors ON and OF F. One part in 1024 (10 bit) . Calibrated for 100 points per divisio n.a Graticule indication at time cursor difference is within 1 % of crt -J cursor readout value, measured over center 6-divisions. Within ±0.1 division . Less than 0.05 division .

Offset with Vectors ON

Less than 0.1 division difference between graticule indication and crt cursor readout when active time cursor is positioned anywhere along center horizontal graticule line and inactive cursor is at center screen ."

Specification-2430 Service Table 1-1 (cont) Characteristics AC POWER SOURCE Source Voltage Nominal Ranges 115V 230 V Source Frequency Fuse Rating 90Vto1 32V.a 180 V to 250 V.a 48 Hz to 440 Hz .e 5 A, 250 V, AGC/3AG, Fast Blow ; or 4 A, 250 V, 5 X 20 mm Time-Lag (T).a Each fuse type requires a different fuse cap.a Power Consumption Typical (standard instrument) Maximum (fully optioned instrument) Primary Grounding° °Performance Requirement not checked in the manual . Routine test is with ROD-L/EPA Electronic Model 100AV Hi-Pot Tester . This tests both the Primary Circuit Dielectric Withstand and Primary Grounding in one operation. Contact Tektronix Product Safety prior to using any other piece of equipment to perform these tests. 160 watts (250 VA).a 200 watts (300 VA).a _._ .~ Performance Requirements

Type test 0.1 tZ maximum. Routine test to check grounding continuity between chassis ground and protective earth ground .a

Specification-2430 Service Table 1-2 Environmental Characteristics Characteristics STANDARDINSTRUMENT vironmental Requirements Performance Requirements .

The 2430 Digital Oscilloscope meets the environmental requirements of MIL-T-288000 for Type III, Class 3, Style D equipment, with the humidity and temperature requirements defined in paragraphs 3.9 .2 .2, 3.9 .2 .3, and 3.9 .2 .4 .

Temperature Operating Nonopera ting (storage) Altitude Operating

-15°C to +55°C. -62°C to +85'C.

-

To 15,000 feet (4500 meters). Maximum operating temperature decreased 1 ° C for each 1000 feet (300 meters) above 5000 feet (1500 meters). To 50,000 feet (15,000 meters). Stored at 95% relative humidity for five cycles (120 hours) from 30°C to 60°C, with operation performance checks at 30°C and 55°C . 15 minutes along each of three axes at a total displacement of 0.025 inch (0 .64 mm) p-p (4 g at 55 Hz), with frequency varied from 10 Hz to 55 Hz in one-minute sweeps . Hold 10 minutes at each major resonance, or if none exist, hold 10 minutes at 55 Hz (75 minutes total test time) . 50-g, half-sine, 11-ms duration, three shocks on each face, for a total of 18 shocks . 12-inch (300-mm) drop on each corner and each face (exceeds MIL-T-288000, paragraphs 3.9 .5 .2 and 4.5 .5 .4 .2). MIL-STD-810C, Method Paragraph 4.5 .5 .4 .3). 516.2, Procedure V (MIL-T-288000,

Nonoperating (storage) Humidity Operating and Storage

Vibration Operating

Shock Operating and Nonoperating Transit Drop (not in shipping package) Bench Handling

Cabinet On and Cabinet Off

Topple (cabinet installed) Operating Packaged Transportation Drop

Set on rear feet and allow to topple over onto each of four adjacent faces (Tektronix Standard 062-2858-00) . Meets the limits of the National Safe Transit Assn ., test procedure IIA-B-2 ; 10 drops of 36 inches (914 mm) (Tektronix Standard 062-2858-00). Meets the limits of the National Safe Transit Assn ., test procedure 1 A-B-1 ; excursion of 1 inch (25.4 mm) p-p at 4 .63 Hz (1 .1 g) for 30 minutes (Tektronix Standard 062-2858-00) .

Vibration

Specification-2430 Service Table 1-2 (cont) Characteristics Environmental Requirements (cont) EMI (electromagnetic interference) Meets MIL-T-288000 ; MIL-STD-46113, part 4 (CE-03 and CS-02), part 5 (CS-06 and RS-02), and part 7 (CS-01, RE-02, and RS03-limited to 1 GHz) ; VDE 0871, Category B ; Part 15 of FCC Rules and Regulations, Subpart J, Class A; and Tektronix Standard 062-2866-00. Meets Tektronix Standard 062-2862-00 . The instrument will not change control states with discharges of less th an 10 kV . Meets requirements of Tektronix Standard 062-1860-00. RACKMOUNTEDINSTRUMENT Environmental Requirements Listed characteristics for vibration and shock indicate those environments in which the rackmounted instrument meets or exceeds the requirements of MIL-T-288000 with respect to Type III, Class 5, Style D equipment with the rackmounting rearsupport kit installed. Refer to the Standard Instrument Environmental Specification for the remaining performance requirements . Instruments will be capable of meeting or exceeding the requirements of Tektronix Standard 062-2853-00, class 5. -15°C to +55°C, ambient temperature measured at the instrument's air inlet. Fan exhaust temperature should not exceed +65°C. 15 minutes along each of three major axes at a total displacement of 0.015 inch (0 .38 mm) p-p (2 .3 g at 55 Hz), with frequency varied from 10 Hz to 55 Hz to 10 Hz in one-minute sweeps . Hold 10 minutes at each major resonance, or if no major resonance present, hold 10 minutes at 55 Hz (75 minutes total test time). 30-g, half-sine, 11-ms duration, three shocks per axis in each direction, for a total of 18 shocks . Performance Requirements

Electrostatic Discharge Susceptibility X-Ray Radiation

Temperature (operating)

Vibration

Shock (operating and nonoperating)

Specification-2430 Service Table 1-3 Mechanical Characteristics Characteristics STANDARDINSTRUMENT Weight With Front Cover, Accessories, and Accessories Pouch Without Front Cover, Accessories, and Accessories Pouch Domestic Shipping Weight Overall Dimensions Height With Feet and Accessories Pouch Without Accessories Pouch Width (with handle) Depth With Front Cover With Handle Extended Cooling Finish Construction 479 mm (18.86 in). 550 mm (21 .65 in) . Forced air circulation ; no air filter . Tektronix Blue vinyl-clad material on aluminum cabinet. Aluminum-alloy/plastic-composite chassis (spot-molded) . Plasticlaminate front panel. Glass-laminate circuit boards. RACKMOUNTING Rackmounting Conversion Kit Weight Height Width Depth Rear Support Kit Weight Ra ckmounted Instrument (Option 1 R) Weight Height Width Depth Domestic Shipping Weight Domestic Shipping Weight 4.0 kg (8 .8 Ibs) . 6.3 kg (13.8 Ibs) . 178 mm (7 in). 483 mm (19 in). 419 mm (16 .5 in). 0.68 kg (1 .5 Ibs) . OPTION 1R -15.8 kg (34.9 Ibs) . -18.1 kg (39.9 Ibs) . 178 mm (7 in). 483 mm (19 in). 419 mm (16 .5 in). -12.8 kg (28.1 Ibs) . -10.9 kg (23.9 Ibs) . -16.4 kg (36 Ibs). See Figure 1-1 for a dimensional drawing . 190 mm (7 .48 in). 160 mm (6 .3 in). 330 mm (13.0 in). Description

REV DEC 1986

1-17

Specification-2430 Service Table 1-4 Option 05 (TV Trigger) Electrical Characteristics Characteristics VERTICAL-CH ANNEL 1 AND CHANNEL 2 Frequency Response Full Bandwidth 50 kHz to 5 MHz Greater than 5 MHz to 10 MHz Greater than 10 MHz to 30 MHz Within ±1% . Within +1%, -2%. For VOLTS/DIV switch settings between 5 mV and 0.2 V per division with VARIABLE VOLTS/DIV set to CAL. Five-division, 50 kHz reference signals from a 50 tZ system . With external 50 D termination on a 1 MQ input. Within +1%, -4%. Within +2%, -3%.

20 MHz Bandwidth Limit 50 kHz to 5 MHz Square Wave Flatness Field Rate 5 mV/div to 20 mV/div 50 mV/div

± 1 %, 1 % p-p at 60 Hz with input signal of 0.1 V. With fast-rise step (rise time 1 ns or less), 1 MQ do input coupling, an external 50 tZ termination, and VARIABLE VOLTS/DIV set to CAL. Exclude the first 20 ns following the step transition and exclude the first 30 ns when 20 MHz BW LIMIT is set. ± 1 %, 1 % p-p at 15 kHz with input signal of 0.1 V.± 1 %, 1 % p-p at 60 Hz with input signal of 1 .0 V.

1 1 1 1 1 I 1 1 1 1 1 1 1 1

Line Rate

5 mV/div to 20 mV/div

50 mV/div TV (Back-Porch) Clamp (CH 2 Only) 60 Hz Attenuation

t 1 %,

1 % p-p at 15 kHz with input signal of 1 .0 V.

For VOLTS/DIV switch settings between 5 mV and 0.2 V with VARIABLE VOLTS/DIV set to CAL. Six-division reference signal . Within ± 1 .0 division of ground reference.

18 dB or greater.

Back-Porch Reference

1-18

Specification-2430 Service Table 1-4 (cont) Characteristics

I
TRIGGERING

Performance Requirements

Sync Separation

Stable video rejection and sync separation from sync-positive or sync-negative composite video, 525 to 1280 lines, 50 Hz or 60 Hz, interlaced or noninterlaced systems . All lines : Field 1, selected line (1 to n), Field 2, selected line (1 to n), Alt fields, selected line (1 to n) .

Trigger Modes

A Horizontal Mode

n is equal to or less than the number of lines in the frame and less than or equal to 1280 . B Horizontal Mode Minimum Input Signal Amplitude for Stable Triggering" Channel 1 and Channel 2 Composite Video Composite Sync 2 divisions . Peak signal amplitude within 18 divisions of input ground reference. 0.6 division . Delayed by time .

EXT TRIG 1 or EXT TRIG 2 EXT GAIN = 1 Composite Video Composite Sync EXT GAIN = =5 Composite Video Composite Sync 300 mV 150 mV Peak signal amplitude within ±4 .9 V from input ground reference. 60 mV 30 mV Peak signal amplitude within ± 0.9 V from input ground reference.

°Performance Requirement not checked in manual.

Specification-2430 Service

5 . 53 [141]

[14 7]

5 . 78

6 .33 [1611

i

[338]

13 .31

10.68 [2711

11 .63 [2961

11 .88 [302]

Dimensions are in inches

[mm]

Figure 1-1 . Dimensional drawing.

1-20

Section 2--2430 Service

PREPARATION FOR USE
SAFETY
This section tells how to prepare for and to proceed with the initial start-up of the TEKTRONIX 2430 Digital Oscilloscope . Refer to the Operators and Servicing Safety Summaries at the front of this manual for power source, grounding, and other safety considerations pertaining to the use of the instrument . Before connecting the oscilloscope to a power source, read both this section and the Safety Summaries . 2. Pull the cap (with the attached fuse inside) out of the fuse holder . 3. Verify proper fuse value (see Table 2-1) . 4. Install the proper fuse and reinstall the fuse-holder cap. NOTE A 4 A, 250 V, 5 X 20 mm Time-lag (T) fuse may be substituted for the factory-installed fuse. However, the two types of fuses are NOT directly interchangeable; each requires different type of fuse cap.

a

This instrument may be damaged if operated with the LINE VOLTAGE SELECTOR switch set for the wrong applied ac input-source voltage or if the wrong line fuse is installed.

LINE VOLTAGE SELECTION
The 2430 operates from either a 115 V or 230 V nominal ac power-input source having a line frequency ranging from 48 Hz to 440 Hz . Before connecting the power cord to a power-input source, verify that the LINE VOLTAGE SELECTOR switch, located on the rear panel (see Figure 2-1), is set for the correct nominal ac input-source voltage. To convert the instrument for operation from one line-voltage range to the other, move the LINE VOLTAGE SELECTOR switch to the correct nominal ac sourcevoltage setting (see Table 2-1) . The detachable power cord may have to be changed to match the particular powersource outlet .

'N SEFORE REPLACINI ~TtCTION RERLACF PE AND RATED FUSE . JL198.8!'MO) Y " tp 25OY 6A FAST FOR LABORATORY USE BY CERTIFIED PERSONNEL . POUR EMPLOI PAR LE PERSONNEL DE LABORATORE. LR37158

LINE FUSE
To verify the proper value of the instrument's powerinput fuse, perform the following procedure: 1 . Press in the fuse-holder cap and release it with a slight counterclockwise rotation . Figure 2-1 . LINE VOLTAGE SELECTOR, line fuse, and power cord receptacle .

Preparation for Use-2430 Service

Table 2-1 Voltage, Fuse, and Power-Cord Data

Plug Configuration w ® o

Category

Power Cord And Plug Type

Line Voltage Selector Setting

Voltage Range ( AC)

Factory Installed Instrument Fuse 5A, 250V AGC/3AG ( t-b~l8 w ) o

Fuse Holder Cap

Reference Standards°

~

U .S . Domestic Standard

U .S . 120V 15A EURO 240V 10-16A UK8 240V 6A' Australian 240V 10A North American 240V 15A Switzerland 220V 6A

115V

90V to 132V

UL

AGC/3AG

ANSI C73 .11 NEMA 5-15-P UL 198 .6 CEE(7), II, IV, VII IEC 83 IEC 127 BS 1363 IEC 83 IEC 127

v

Option A1

230V

180V to 250V

5A, 250V AGC/3AG (UL 1 198 .6) 5A, 250V AGC/3AG Fast-blow (UL 198 .6) 5A, 250V AGC/3AG Fast-blow (UL 198 .6) 5A, 250V AGC/3AG Fast-blow (UL 198 .6) 5A, 250V AGC/3AG Fast-blow (UL 198 .6)

AGC/3AG

Option A2

230V

180V to 250V

AGC/3AG

Option A3

230V

180V to 250V

AGC/3AG

AS C112 IEC 127 ANSI C73 .20 NEMA 6-15-P IEC 83 UL 198.6 SEV IEC 127

,, Option A4
a

230V

180V to 250V

AGC/3AG

Option A5

230V

180V to 250V

AGC/3AG

° A 6A, Type C fuse is also installed inside the plug of the Option A2 power cord . ° Reference Standards Abbreviations : ANSI-American National Standards Institute AS-Standards Association of Australia BS-British Standards Institution CEE-International Commission on Rules for the Approval of Electrical Equipment IEC-International Electrotechnical Commission NEMA-National Electrical Manufacturer's Association SEV-Schweizevischer Elektrotechischer Verein UL-Underwriters Laboratories Inc .
4918-03

Preparation for Use-2430 Service

POWER CORD
This instrument has a detachable three-wire power cord with a three-contact plug for connection to both the power source and protective ground . The power cord is secured to the rear panel by a cord-set securing clamp. The protective ground contact on the plug connects (through the power cord protective grounding conductor) to the accessible metal parts of the instrument. For electrical shock protection, insert this plug into a power-source outlet that has a properly grounded protective-ground contact. Instruments are shipped with the required power cord as ordered by the customer . Information on the available power cords is presented in Table 2-1, and part numbers are listed in "Options and Accessories" (Section 7) . Contact your Tektronix representative or local Tektronix Field Office for additional power-cord information .

START-UP
The 2430 automatically performs power-up self tests each time the instrument is turned on . These tests provide the user with the highest possible confidence level that the instrument is fully functional . If no faults are encountered, the instrument will enter the Scope mode in the SAVE Storage mode . Failure of a test in the range of 6000 to 9300 may not indicate a fatal scope fault. Several conditions can occur that will cause a nonfatal failure of the tests. In each of these cases, the abnormal condition is brought to the user's attention by the scope entering the "EXTENDED DIAGNOSTICS" mode . Recovery from some abnormal conditions may be possible by simply pressing the MENU OFF button to enter the Scope mode . Running the "SELF CAL" procedure after the scope has warmed up ("NOT WARMED UP" message is removed from the main CAL/DIAG menu in about ten minutes after poweron) may also eliminate the cause of the nonfatal error. Refer to "Calibration and Diagnostics," located in Section 6 of this manual, for information on the power-up tests and the procedures to follow in the event of a failed test .

INSTRUMENT COOLING
To prevent instrument damage from overheated components, adequate internal airflow must be maintained . Before turning on the power, first verify that air-intake holes on the bottom and side of the cabinet and the fan exhaust holes are free of any obstruction to airflow. The scope has a thermal cutout that will activate if overheating occurs . The scope shuts down immediately with no attempt to save waveforms or front-panel conditions if a cutout happens . Power will be disabled to the scope until the thermal cutout cools down, at which time the power-on sequence is redone . The resulting loss of the last frontpanel and waveform data will cause the power-on self test to fail and is indicated to the user by a failed CKSUMNVRAM test (number 6000 in the main EXTENDED DIAGNOSTICS menu). The cause of the overheating must be corrected before attempting prolonged operation of the scope. Pressing the MENU OFF/EXTENDED FUNCTIONS button exits the EXTENDED DIAGNOSTICS mode to the normal operating mode.

If the power-on self-test fails due to an actual component failure, the scope may still be usable for the immediate measurement purpose. For example, if the problem area is in CH 2, CH 1 may still be used with full confidence of making accurate measurements . Depending on the nature of the failure, the "UNCALD" message may or may not be displayed, but the failed test or tests will be indicated by a "FAIL" message displayed with the associated EXTENDED DIAGNOSTICS test . Press the MENU OFF/EXTENDED FUNCTIONS button to exit EXTENDED DIAGNOSTICS to check out the scope for use.

OPERATING INFORMATION
All operating information pertaining to the use of the menus, controls and connectors, operators familiarization, and basic applications is found In the 2430 Operators Manual . A User Reference Guide, supplied with the 2430, provides quick reference to the menu-selected features of the instrument . GPIB operating information is included in the Operators Manual . Additional information on the GPIB (General Purpose Interface Bus) may be found in the Instrument Interface Guide, written specifically for system programmers.

A fatal fault in the operating system will cause the scope to abort . No displays are possible, and the user is notified of an abort situation only by the flashing of the Trigger LED indicators (if that is possible). Cycling the power off then back on may clear the problem, but a failure of this magnitude will usually require the scope to be checked and repaired by a qualified service person . Persistent or reoccurring failures of the power-on or selfdiagnostic test should be repaired at the first opportunity .

Operation of the diagnostics features and troubleshooting of the 2430 are detailed in Section 6 of this manual (Maintenance) under "Calibration and Diagnostics ." Consult your service department, your local Tektronix Service Center, or nearest Tektronix representative if further assistance is needed .

Preparation for Use-2430 Service

POWER-DOWN
NOTE DO NOT TURN THE 2430 OFF WHILE THE SELF CAL ROUTINE IS RUNNING. Turning off the power prior to completion of SELF CAL will invalidate the instrument calibration constants. The scope will then require a partial calibration to restore the constan