LECROY_9450 电路图.pdf

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1、9450A Portable, Dual-Channel Digital Oscilloscope Main Features I 50K memory per channel Automatic PASSIFAIL testing on templates and parameters Segmentable memories with trigger point time stamps FASTGLITCH trigger mode Signal processing and FFT analysis m Optional high speed memory card D Unmatche

2、d display quality TV trigger and XY display The Ultimate Instrument for Design and Test The LeCroy 9450A combines high bandwidth, fast sampling rates, high fidelity, extensive trigger capabilities and signal processing. Aimed at meeting the demands of researchers and engineers working in fields as d

3、iverse as telecom- munications, electronic design and test, lasers, computers, NDT, physics and defense, the 9450A will rapidly become an indispensable measurement tool in any laboratory. Like all LeCroy oscilloscopes, the 9450A i s designed to serve as a range of different instruments: oscilloscope

4、, transient recorder, counterftimer, frequency meter, signal averager, data ogger and digits vohmeter. t offers the highest performing data acquisition and processing system available in any portable instrument. The 9450A is shown measuring a frequency shitf keyed signal. The FFT of the waveform is

5、shown in the lower trace, indicating peaks at 1 MHz and 1.5 MHz. Functional Description including spikes and glitches. It is fully oroarammable over GPlB or RS-232-C The LeCray 9450A Dual-channel Digital Oscilloscope is a pawertul high-resolu- fion instrument for waveform recording and sophisticated

6、 analysis. It provides a bandwidth of 300 MHz, and sampling rates of up to 400 MSIsec for transients and 10 GS/sec for repetitive waveforms. The instrument features high-fidelity, 8-bit ADCS, 50K of non-volatile acquisi- tion memory per channel, 200K of addiliona waveform storage memory, extensive p

7、ulse parameter analysis, and a highly sophisticated trigger system to capture the most complex signals, ;nt SECTION Bandwidth (-3 dB): 50 ii, DC to 300 MHz 1 M i . ! DC DC to 250 MHz typical at the probe t p Input impedance: 1 MQ1l 5 pF and 50 Cl11% Channels: Two Independent channels; standard BNC c

8、onnector lnputs Sensitivity range: 5 mV:dtv to 2 Vidiv, continuously var ab e from 1 to 2 5 trmes the flxed setlrng Fxed settlngs range frow 5 mV1d1v to 2 Vldlv (In a I 2, 5 sequence) Vertical expansion: Up to 5 tlrnes (wlth averaging up to 50 lmes or 100 rnV/dlv sensltrvlty). Scale factors: Probe a

9、ttenuation factors of XI Xlo, X100, XlG00 X10G00 may be selected and are remotely programmable Offset: i 1 2 times the flxed ssnsitivity setting In 0 02 drvson increments up to 50 V rnax ; j;24 dlv 10 mVdiv, 248 drv 5 mVidiv DC accuracy: i2%, fuli scale Bandwidth Ilmlter: 80 MHz (-3 dB) typlcal Maxm

10、um input voltage: 250 V (DC + peak AC 10 kHz) a? 1 NlQ 55 V DC (500 mW) or 5 V RMSat50R VERTICAL DIGITAL SECTION ADCs: One per channel, magnetic deflection; vector type. Resolution: 4096 x 4096 points. Real-time clock: Date, hours, minutes, see. Grid: lnternaliy generated; separate intensity control

11、 for grid and waveforms. Single, dual and pulse prameter measurement grid mode. Persistence mode: Plots consecutively acquired traces of up to four sources (CHANl, CHAN2. Memory C or D. Function E or F and Expansion A or 8) on top of each other, allowing waveform irends and history to be examined. T

12、he number of sweeps is selectable from 1, 2, 5 10. 20, 50, 100, 200 or INFINITE. Time and voltage cursor measurements are supported in persistence mode. XY mode: Plots any two sources (CHAN1 and 2, Expansions A and 8, Memories C and D ard Functions E and F) against one another. Operates on live wave

13、forms with fuil cursor readout. Hard copy: Single or multi-pen digital potte!s as well as printers can be used to make hard copies of the display. Screen dumps are activated by a front-panel push-button or via remote control. Plotters supported are the HP 7400 and 7500 series, Philips PM 81 51, Grap

14、htek FP 5301, and cornpatibe models. Prnters supported are: EPSON and the HP ThinkJet, QuietJet and LaserJet. Plotting can be done in parallel with normal 9450A operation. Graphics: Waveforms and display information are presented using vector (linear) graphics. Expanded waveforms use LeGroys DOT-LIN

15、EAR graphics that highlight actual data points and interpolate linearly between them. Menus: Waveform storage; acquisition parameters; memory status; savelrecall front- panel configurations; SMART trigger; waveform parameters, RS-232-C configuration; hardcopy setup and real-time clock setup, averagi

16、ng, arithmetic, and PASS1 FAIL. Cursors Relative time: Two cursors provide time measurements with a resolution of k0.0546 of full scale for unexpanded traces: up 10 10% of the sampling interval for expanded traces. The corresponding frequency information is also provided. Relative voltage: Two horiz

17、ontal bars measure voltage diflerences to 50.2% of full scale for each trace. Absolute time: A cross-hair marker measures absolute voltage versus signal ground, as well as the time relative to the trigger. Absolute voltage: A reference bar measures absolute voltage with respect to ground. Pulse para

18、meters: Two cross-hair cursors are used to define a region of interest for which pulse parameters will be calculated automatically. AUTO-SETUP Pressing the auto-setup button automatically scales the time Dase, trigger and sensitivity settings to provide a stable display for a wide range of repetitiv

19、e input signals. Type of signals detected: Repetitive sigrals with amplitudes between 2 mV and 8 V, frequency above 50 Hz and a duty cycle greater than 0.1%. Auto-setup time: Approximately 2 sec. W4VEFORM PROCESSING Waveform processing routines are set up via menus. These incltde arithmetic lunction

20、s (add, subtract and invert), and summation averaging (up to 1800 signals). Pulse parameters: Based on ANSlilEEE Std. 181-1977 Standard on Pulse Measurement and Analysis by Objective Techniques. The lerminology is derived from IEEE Std. 194- 1977 Standard Pulse Terms and Definitions. Automatic measu

21、rements determine: Arnptitude Frequency Period Area Maximum Pulse Width Base Mean Rise Time Cycles Minimum RMS Delay Overshoot Neg Standard Dev Duty Cycle Overshool Pos Top Fall Time Peak-Peak Sources: CHANT, CHAN2. Memory C or D, Function E or F, Expansion A or B. Cursors define the rneasu:ement zo

22、ne. Wth more than 1 pulse present in the measurement zone, averaged results for period. widih, rise time and fall time ate presented. REMOTE CONTROL Front-panel controls, including variable gain, offset, position controls and cursors, as well as all internal func!ions are programmable. RS-2324 port:

23、 For cornputer/terminal control or plotter connection. Asynchronous up lo 19200 baud. GPlB port: (IEEE-488). Configured as taikerl listener tor computer control and fast data liansfer. PROBES Model: Two P9020 probes supplied. Probe calibration: 1 kHz square wave, 1 v v-P Probe power: Two rear-panel

24、power outlets for use wlth actlve probes provide r15 V. +5 v DC. SELF TESTS Auto-calibration ensures specified DC and time accuracy. GENERAL Temperature: 5 to 40 C (41 to 104 F) rated; 0 to 50 C (32 to 122 F) operating. Humidity: 80%. Power required: i t O or 220 V AC, 45 to 440 Hz, 275 W. Shock and

25、 vibration: Meets requirements of MIL-STD-81OC modified to LeCroy design specifications, and MIL-T-288OOC. Battery backup: Lithium batteries rnaintan front-panel settings and waveform data for 2 years. Dimensions: (HWD) 21 x 37 x 50 cm, 18.5 x 14.5 x 20 inches). Weight: 15 kg (33 lbs) net. 20 kg (44

26、 Ib) shipping. Warranty: 2 years. ORDERlNCi 1NFORMATlON Oscilloscope and Options Code Description 9450A 31g1tal osclloscope 9450AWPOt Waveform processing option 9450AWP02 FFT processmg option 945OAMATE CllUMATE optlon 9450A-MC01 Memory card reader 9450A-MC02 128K memory card 9450A-MC04 51 2K memory a r d OM945OA Operators manual 94XX-FC Front cover