LeCroy_9400A_Operators_Manual 电路图.pdf

THE LeCROY MODEL 9400A DIGITAL OSCILLOSCOPE North American Headquarters: LeCROY Corporation 700 Chestnut Ridge Road Chestnut Ridge, NY 10977-6499 U.S.A. Tel: 914-578 6097 European Headquarters: LeCROY S.A. 2, rue Pr-de-la-Fontaine Case postale 341 1217 Meyrin 1 / Geneva Switzerland Tel: 41-22-719-21-11 Serial Number January 1990 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS Section I. GENERAL INFORMATION Technical Data Sheet 1.1 1.2 1.3 1.4 1.5 1.6 Warranty Assistance and Maintenance Agreements Documentation Discrepancies Service Procedure Return Procedure Initial Inspection 2.PRODUCT DESCRIPTION 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Introduction 9400A Architecture ADCs and Memories Trigger Automatic Calibration Display Manual and Programmed Control 3.INSTALLATION 3.1 3.2 3.3 Safety Information Operating Voltage Switching on the 9400A 4.DISPLAY LAYOUT 4.1 4.2 4.3 4.4 4.5 4.6 Menu Field Time and Frequency Field Trigger Delay Field Abridged Front Panel Status Field Displayed Trace Field Message Field 5.MANUAL OPERATION 5.1 Front-panel Controls 5.1.1Vertical 5.1.2Time Base 5.1.3Trigger 5.1.4Displaying Traces 5.1.5Display Control 5.1.6Screen Adjustments 5.1.7Cursors Page Number I-I i-I 1-2 1-2 1-2 1-3 2-1 2-1 2-2 2-3 2-3 2-3 2-3 3-1 3-1 3-2 4-1 4-2 4-2 4-2 4-2 4-3 5-1 5-1 5-4 5-6 5-12 5-12 5-1 5-15 ii RadioFans.CN 收音机爱 好者资料库 5.2 Menu Controls 5-18 5.2.1 5.2.2 5.2.3 5.2.4 5.2.5 5.2.5.1 5.2.5.2 Store Menu Panel Status Menu Memory Status Storage and Recall of Front Panel Setups Special Modes Auto-store Mode Common Expand Mode 5.2.6RS-232-C Setup 5.2.7Plotter Setup 6.REAR PANEL CONTROLS AND CONNECTORS 6.1 6.2 6.3 6.4 6.5 Fuse Protection Accessory Power Connectors Battery Pack GPIB and RS-232-C Port Selection Plotter Connector 7.REMOTE OPERATIONS 7.1 7.2 7.3 7.4 Programmed Control RS-232-C Ports GPIB Port (Option OP02 only) CIB and RS-232-C Command Format 7.4.1 7.4.2 7.4.3 7.4.4 7.4.5 7.4.6 7.4.7 7.4.8 7.4.9 Introduction Compound Commands Command Format Answers from the 9400A Flushing of 9400A Output Buffer Command Synchronization with Data Acquisition Character Strings Prompt Errors and Adapted Values 7.5 7.6 Data Block Transfers Commands 7.6.1 7.6.2 7.6.3 7.6.4 7.6.5 7.6.6 7.6.7 7.6.8 7.6.9 7.6.10 Notation Acquisition Parameter Commands Display Commands Plotter Commands Transfer Commands Other Remote Commands Communication Format Command Status Byte and Mask Register Commands GPIB Interface Message Interpretation RS-232-C Only Commands 5-18 5-20 5-22 5-24 5-25 5-25 5-26 5-26 5-28 6-1 6-1 6-1 6-1 6-2 7-1 7-1 7-2 7-3 7-3 7-4 7-4 7-5 7-6 7-6 7-7 7-7 7-8 7-8 7-11 7-11 7-12 7-15 7-20 7-22 7-30 7-31 7-34 7-38 7-39 iii 7.7 7.8 7.9 7.10 Binary Format of Waveform Descriptors Format of Trigger Time(s) Data Addressing Conventions Interpretation of Waveform Data Values 7-43 7-47 7-48 7-50 7.10.1 7.10.2 7.11 Waveform Data in 8-bit Format Waveform Data in 16-bit Format Use of the Service Request (SRQ) Interrupts 7-50 7-52 7-52 7.11.1 7.11.2 Service Request in GPIB Service Request in RS-232-C 7-52 7-55 8.BASIC 9400A WAVEFORM MEASUREMENTS AND OPERATING PROCEDURES 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 8.10 8.11 8.12 8.13 8.14 8.15 Repetitive Signal Acquisition Single Shot Acquisition Trace Expansion - Expand A/B Sequential Recording of Single Events in Segmented Memory Slow Signal Recording Window Triggering Storing and Recalling Front Panel Setups Signal Storage in Memories C, D Redefinition Function - Expand Memories C, D Auto-Store in Memory C, D Common Expand Mode Remote Control Via RS-232-C Port Remote Control Via GPIB (Option OP02 Only) Making a Plot when the Computer, the 9400A, and the Plotter are All Connected Together on a GPIB Bus (Option OP02 Only) 8-1 8-3 8-5 8-6 8-8 8-9 8-9 8-10 8-11 8-12 8-13 8-14 8-18 8-19 Configuring the Parallel Polling (Option 0P02 0nly) 8-20 9.GETTING THE MOST OUT OF YOUR 9400A 9.1 9.2 9.3 9.4 Front Panel Controls Accurate Amplitude Measurements Accurate Time Measurements Auto-calibration 9-1 9-1 9-3 9-4 I0.WPOI WAVEFORM PROCESSING OPTION I0.i 10.2 Processing Capabilities Setting up a Waveform Processing Function Manually I0-i 10-2 10.2.1 10.2.2 10.2.3 10.2.4 10.2.5 10.2.6 Summed Average Continuous Average Extrema Arithmetic Functions Smoothing 10-3 10-4 10-5 10-6 10-6 10-6 iv 11. 10.3 10.4 10.5 10.6 Remote Control of Waveform Processing Functions Additional Values in the Descriptors of Processed Waveforms Vertical Scaling Units Index of Topics Fast Fourier Waveform Processing Option (WP02, V 2.06FT) ii.i 11.2 11.3 11.4 Processing Capabilities Modification to WP01 Functions FFT Processing Examples Remote Control of FFT Processing 11.4.1 11.4.2 Remote Commands Additional Values in the Descriptors of FFT Processed Waveforms 11.5 FFT Application Hints 11.5.1 11.5.2 11.5.3 Some practical suggestions Relationships of 9400A FFT output waveforms to the FFT computation steps Computation Speed of FFT 11.6 11.7 11.8 11.9 ii. I0 FFT 9400A Glossary Errors and Warnings Table of Nyquist Frequencies References Index of Topics 10-8 10-13 10-15 10-17 II-I 11-3 11-4 11-7 11-7 11-9 ii-ii II-ii 11-12 11-15 11-16 11-21 11-22 11-29 11-30 Appendix STORE 0 0 0 0 0 0 0 0 0 POWER SCREEN DUMP 11 4443 42 40 39 100Ms/s LeCroy9400A DUAL 175MHz OSCILLOSCOPE sG,/s SELECT I .EOEF, NE I 45 2 3 4 5 6 7 8 9 10 46 47 48 49 INTENSITYGRID INTENSITYDUAL GRID CURSOR MEASUREMENT MODE VOLTAGETIMEMARKER oooo 121314 16 17 18 REMOTE ON 15 0 VERT GAINPosmoN .+ TIME MAGNIFIER + POSITION ( CHANNEL 1 OFFSET (p: VOLTSIDIV CHANNEL 2 OFFSET I VOLTSIDIV PROBE CALIBRATOR 19!1021 5V5mY5V 5mV I I 6ND I GND OCDC 6110HD .,o, 0,oo, 0 I.I,.,. 250 V pk MAX250 Y pk MAX I 22 REFERENCEDIFFERENCE TRACKING INTERLEAVED SAMPLING ON O LEVEL / DELAY - -.,+ + - TIIISn ilEAny I COUPLINGMODE , 10 ,.,-10 LF REJ HF RF.J loll 0 0 0 IIIOUll SOURCESLOPE CIAll T 0 HIS c.,.-;- 0 UNE i ,1,0 EJTIIO EXTERNAL 250 V pk MAX ON 23 24 2526 38 37 36 35 34 33 32 31 30 29 28 27 9400A FRONT PANEL Figure 1.1 515253 54 55 56 57 9400A REAR PANEL Figure 1.2 For instant hard copies the 9400As screen dump feature sends data directly to the DPgO01 8-pen digital plotter. ORDERING INFORMATION Oscilloscope and Options Code Description 9400A/GDigital Oscilloscope 9400AOP01High-precision Option 9400AOP03Printer Option for 9400A/G 9400AWP01Waveform Processing Option 9400AWP02FFT Processing Option (requires 9400AWP01) 9400AMS01Mass Storage and Remote Control Package, in- cluding an IBM lap-top controller, interface, cables and software 9400AIM01GPIB Interface for IBM-PCC computers 9400CS01Calibration Software Oscilloscope Accessories OM9400AOperators Manual SM9400AService Manual US SALES OFFICES 1-800-5-LeCroy automatically connects you to your local sales office. WORLDWIDE Australia: Scient. Devices Pty, Ltd, (03) 579-3622 Austria: Dewetron Elektr. Messger DC - 150 MHz at 5 mV/div. 1 M AC: < 10 Hz - 100 MHz typical. 1 M DC: DC - 100 MHz typical. Single shot: DC - 50 MHz (Nyquist). Input impedance: 1 M/50 pF and 50 +_ 1%. Channels: Two; standard BNC connector inputs. Sensitivity range: 5 mV/div to 1 V/div at 50 impedance and 5 mV/div to 5 V/div at 1 M impedance; detents at 1-2-5, 1 : 2.5 continuously variable. Offset: _+ 8 divisions in 0.04 division increments. DC accuracy: Standard < + 2%, optional _< + 1%. Noise: _< 0.45% RMS. Bandwidth limiter (- 3 dB): 30 MHz. Max input voltage: 250 V (DC + peak AC) at 1 M, 5 V (500 mW) or _+ 10V peak AC at 50 VERTICAL DIGITAL SECTION ADCs: One per channel, 8-bit flash. Conversion rate: Up to 100 megasamples/sec for transient signals, up to 5 gigasamples/sec for repetitive signals, simul- taneously on both channels. Aperture uncertainty: + 10 psec. Overall dynamic accuracy (typical): Sine wave applied to the BNC input for RMS curve fit at 80% full scale. The accu- racy measurement includes the front-end amplifier, sample Single shot for transient signals and repetitive signals from 50 nsec/div to 200 msec/div; Roll for slowly-changing signals from 500 msec/div to 100 sec/div; Sequence for capturing transients in segmented memories of 8, 15, 31,62,125 or250 blocks. Trigger Sources: CHAN1, CHAN2, LINE, EXT, EXT/10. Slope: Positive, negative, window. Coupling: AC, LF RE J, HF RE J, DC. Modes: Sequence: stores multiple events in segmented acquisi- tion memories. Auto: automatically re-arms after each sweep. If no trig- ger occurs, one is generated at 2 Hz repetition rate. Normal: re-arms after each sweep. If no trigger occurs after 2 sec, the display is erased. Single (hold): holds display after a trigger occurs. Re- arms only when the single button is pressed again. Pro-trigger: Adjustable in 0.2% increments, to 100%. Post-trigger delay: Adjustable in 0.02 division increments up to 10,000 divisions. External trigger input: 1M, 200 MHz. SELF TESTS Auto-calibration: Performed every 20 minutes or wheneve the gain or time-base parameters are changed; provides accuracies of: DC gain: + 2% (+ 1% optional) of full scale; Offset: + 0.5% of full scale (50 only); Time: 20 psec RMS. During the warming-up period, auto-calibration is carried OL at 1 minute intervals unless the oscilloscope is in single or sequence trigger mode. DISPLAY CRT: 12.5 17.5 cm (5 x 7 inches); magnetic deflection; vec tor graphics system. Resolution: 1024 x 1024 addressable points. Grid: Internally generated; separate intensity control for gric and waveforms. Single and dual grid mode. Expansion: Dual zoom horizontal expansion operates simu taneously on live, stored and processed waveforms, expanding up to 100 times. Vertical expansion from 0.4 up tc 2 times for non-processed waveforms, up to 10 times for processed waveforms. Screen dump: Single or multi-pen digital plotters are menu selected. The 9400A supports the HP 7400 series, as well a, the Tektronix 4662, Philips PM 8151, Graphtek WX 4638/6. and compatible models. Screen dumps are activated by a front-panel push-button. Cursors: Two time cursors give time resolution of _+ 0.2% c full scale for unexpanded traces; up to +_ 0.002% for expan- ded traces. The corresponding frequency information is alsc provided. Two voltage cursors measure voltage differences to 0.2% of full scale for each trace. A cross-hair marker measures absolute voltage versus signal ground as well as the time relative to the trigger. DIGITAL OSCILLOSCOPE 175 MHz BANDWIDTH, 100 Ms/s, 5 Gs/s LeCroy MODEL 9400A PORTABLE DUAL-CHANNEL OSCILLOSCOPE9400A High Bandwidth and Precision Long Memories High-resolution Display Signal Processing and FFT Mass Storage ignal averaging improves the signal-to-noise ratio and increases sensitivity and vertical resolu- in. Above, a function generator signal is averaged 40 times to show the details of a perturbation (top trace). THE COMPLETE TEST AND MEASUREMENT SYSTEM The LeCroy 9400A Digital Oscilloscope is a powerful general-purpose tool for waveform recording and analysis. Combining ease of use with a comprehensive range of measurement and processing capabilities, it en- ables extremely precise measurements. The LeCroy 9400A provides 175 MHz bandwidth, 100 megasamples/Sec 8-bit ADCs, + 2 % DC accuracy (+ 1% optional), 32K memory per chan- nel, and up to 192K of waveform storage memory. It is fully programmable over RS-232-C or GPIB interfaces. Plotter drivers enable color archiving via a wide range of digital plotters. FEATURES High bandwidth and precision - Two independent channels, each with 175 MHz bandwidth and a high- performance 8-bit ADC, handle input signals with better than +_2% DC accuracy (.-_1% optional). The 9400A features sampling rates of 100 megasamples/ sec for transient events. Long memories and a versatile cursor system (including voltage, time and cross-hair cursors), give time measurements with an accuracy of_0.02% of the time-base setting, and reso- lution of _+0.002% full scale. High-resolution display- The 9400As large display screen produces bright, stable, razor-sharp pictures of your signal under any repetition rate conditions. Very accurate signal comparisons are possible as up to four waveforms (live, expanded or processed) can be dis- played simultaneously on the high-resolution screen (1024 x 1024 pixels). Long memories- The long 32K acquisition memories of the 9400A Digital Oscilloscope capture waveforms with high fidelity. At similar time-base settings, the 9400As long memories allow sampling rates up to 25 times faster than that of instruments which have only 1K of acquisition memory (see graph below). Faster sampling rates ensure higher single-shot bandwidth as well as significantly reducing problems caused by undersampling and aliasing. The 9400As long memo- ries allow displayed waveforms to be expanded up to 100 times to show the finest signal details. Transient recording - With a sampling rate of 100 megasamples/sec, the 9400A is an extremely powerful transient recorder. Long 32K data point acquisition memories, combined with a continuously adjustable trigger (from 100% pre-trigger to 10,000 divisions post-trigger at any time-base setting), ensure that rare events cannot be missed. Both channels are sampled simultaneously so that exact time correlation is main- tained between channels. Full programmability - All the 9400As front-panel controls are fully programmable via the two RS-232-C interface ports or the GPIB port. A single push-button initiates a screen dump for accurate color hard copies of the display via a wide range of digital plotters. The GPIB comes complete with LeCroy MASP software offering computer control and mass storage on any PC compatible with the IBM standard. Signal processing - The waveform processing op- tions extend the applications of the 9400A to high bandwidth signal characterization, as well as mathe- matical and spectral analysis. The routines include averaging (summed and continuous), smoothing, inte- gration, differentiation, square, square-root, full arithmetic, FFT spectral analysis, and Extrema moni- toring. Mass storage and remote control - A sophisticated mass storage and remote control package is available to assist users involved in automated and computer- aided testing. Convenient portability for field applica- tions is also provided by a lap-top computer. 100 50 l0 - 5 - 0.5 - SINGLE-SHOT BANDWIDTH (NYQUIST FREQUENCY) Vs. TIME BASE SETTING 1On50n lO0n SOOn Ip5p 10FI50H %. TIME BASE SETTING (sec/div ) Single-shot bandwidth is a function of sampling rate. Long memories enable higher sampling rates at equal time-base settings. Above, the 9400A (solid line) is compared to oscilloscopes with 1K (dotted line) and 512 points (dashed line) of memory. At slower time-base settings, the single-shot bandwidth of the 9400A, expressed as Nyquist frequency, is typically 25 times higher than in oscilloscopes with 1K memory and 50 times higher than in those with only 512 points. SPECIFICATIONS VERTICAL ANALOG SECTION Bandwidth (- 3 dB): 50 2: DC - 175 MHz at 10 mV/div, up to 225 MHz at 1V/div; DC - 150 MHz at 5 mV/div.