LeCroy_LTXXX_WaveRunner1_Digital_Storage_Oscilloscope_Service_Manual 电路图.pdf

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1、LeCroy waverunner LT Series Service Manual Version A- October 1999 RadioFans.CN 收音机爱 好者资料库 LeCroy Corporate Headquarters 700 Chestnut Ridge Road Chestnut Ridge, NY 10977-6499 USA Tel : (914) 425-2000 Fax : (914) 425-8967 Copyright October 1999. LeCroy is a registered trade-mark of LeCroy Corporation

2、. All rights reserved. Information in this publication supersedes all earlier versions. Specifications subject to change. RadioFans.CN 收音机爱 好者资料库 Read this First 1-1 Read this First 1.Warranty and Product Support It is recommended that you thoroughly inspect the contents of the oscilloscope packagin

3、g immediately upon receipt. Check all contents against the packing list/invoice copy shipped with the instrument. Unless LeCroy is notified promptly of any missing or damaged item, responsibility for its replacement cannot be accepted. Contact your nearest LeCroy Customer Service Center or national

4、distributor immediately (see chapter 2 for contact numbers). 1.1 Warranty LeCroy warrants its oscilloscope products for normal use and operation within specifications for a period of three years from the date of shipment. Calibration each year is recommended to ensure in-spec. performance. Spares, r

5、eplacement parts and repairs are warranted for 90 days. The instruments firmware has been thoroughly tested and is thought to be functional, but is supplied without warranty of any kind covering detailed performance. Products not made by LeCroy are covered solely by the warranty of the original equi

6、pment manufacturer. Under the LeCroy warranty, LeCroy will repair or, at its option, replace any product returned within the warranty period to a LeCroy authorized service center. However, this will be done only if the product is determined after examination by LeCroy to be defective due to workmans

7、hip or materials, and not to have been caused by misuse, neglect or accident, or by abnormal conditions or operation. 1.2 Product Assistance Help on installation, calibration, and the use of LeCroy equipment is available from the LeCroy Customer Service Center in your country. 1.3 Maintenance Agreem

8、ents LeCroy provides a variety of customer support services under Maintenance Agreements. Such agreements give extended warranty and allow clients to budget maintenance costs after the initial three-year warranty has expired. Other services such as installation, training, enhancements and on-site re

9、pairs are available through special supplemental support agreements. 1.4Staying Up to Date LeCroy is dedicated to offering state-of-the-art instruments, by continually refining and improving the performance of LeCroy products. Because of the speed with which physical modifications may be implemented

10、, this manual and related documentation may not agree in every detail with the products they describe. For Note: This warranty replaces all other warranties, expressed or implied, including but not limited to any implied warranty of merchantability, fitness, or adequacy for any particular purpose or

11、 use. LeCroy shall not be liable for any special, incidental, or consequential damages, whether in contract or otherwise. The client will be responsible for the transportation and insurance charges for the return of products to the service facility. LeCroy will return all products under warranty wit

12、h transport prepaid. RadioFans.CN 收音机爱 好者资料库 1-2 Read this First example, there might be small discrepancies in the values of components affecting pulse shape, timing or offset, and infrequently minor logic changes. However, be assured the scope itself is in full order and incorporates the most up-t

13、o-date circuitry. LeCroy frequently updates firmware and software during servicing to improve scope performance, free of charge during warranty. You will be kept informed of such changes, through new or revised manuals and other publications. Nevertheless, you should retain this, the original manual

14、, for future reference to your scope s unchanged hardware specifications. 1.5Service and Repair Please return products requiring maintenance to the Customer Service Department in your country or to an authorized service facility. The customer is responsible for transportation charges to the factory,

15、 whereas all in-warranty products will be returned to you with transportation prepaid. Outside the warranty period, you will need to provide us with a purchase order number before we can repair your LeCroy product. You will be billed for parts and labor related to the repair work, and for shipping.

16、1.6How to return a Product Contact the nearest LeCroy Service Center or office to find out where to return the product. All returned products should be identified by model and serial number. You should describe the defect or failure, and provide your name and contact number. In the case of a product

17、 returned to the factory, a Return Authorization Number (RAN) should be used. Return shipments should be made prepaid. We cannot accept COD (Cash On Delivery) or Collect Return shipments. We recommend air-freighting. It is important that the RAN be clearly shown on the outside of the shipping packag

18、e for prompt redirection to the appropriate LeCroy department. 1.7What Comes with Your Scope The following items are shipped together with the standard configuration of this oscilloscope: Front Scope Cover 10:1 10 M PP006 Passive Probe one per channel Two 250 V Fuses, AC Power Cord and Plug Operator

19、 s Manual , Remote Control Manual, Hands-On Guide Performance Certificate or Calibration Certificate, Declaration of Conformity minimum of four inches or 10 cm of shock-absorbent material. Note: Wherever possible, please use the original shipping carton. If a substitute carton is used, it should be

20、rigid and packed so that that the product is surrounded by a minimum of four inches or 10 cm of shock-absorbent material. General Information 2-1 2.General Information 2.1Product Assistance Help on installation, calibration, and the use of LeCroy equipment is available from your local LeCroy office,

21、 or from LeCroy s Customer Care Center, 700 Chestnut Ridge Road, Chestnut Ridge, New York 109776499, U.S.A., tel. (914) 5786020 European Service Center, 2, rue du Pr-de-la-Fontaine, 1217 Meyrin 1, Geneva Switzerland, tel. (41) 22/719 21 11. LeCroy Japan Corporation, Sasazuka Center Bldg 6th floor, 1

22、-6, 2-Chome, Sasazuka, Shibuya-ku, Tokyo Japan 151-0073, tel. (81) 3 3376 9400 2.2Installation for Safe and Efficient Operation Operating Environment For safe operation of the instrument to its specifications, ensure that the operating environment is maintained within the following parameters: Tempe

23、rature.5 to 40 C (41 to 104 F) rated. Humidity.Maximum relative humidity 80 % RH (non-condensing) for temperatures up to 31 C decreasing linearly to 50 % relative humidity at 40 C Altitude. 2000 m (6560 ft) The oscilloscope has been qualified to the following EN61010-1 category: Installation (Overvo

24、ltage) Category . II Protection Class. . I Pollution Degree. . 2 2-2 General Information Safety Symbols Where the following symbols or indications appear on the instrument s front or rear panels, or elsewhere in this manual, they alert the user to an aspect of safety. .CAUTION: Refer to accompanying

25、 documents (for Safety- related information). See elsewhere in this manual wherever the symbol is present. .CAUTION: Risk of electric shock .On (Supply) R.Standby (Supply) .Earth (Ground) Terminal . Alternating Current Only . Chassis Terminal .Earth (Ground) Terminal on BNC Connectors WARNING.Denote

26、s a hazard. If a WARNING is indicated on the instrument do not proceed until its conditions are understood and met. WARNING Any use of this instrument in a manner not specified by the manufacturer may impair the instrument s safety protection. General Information 2-3 The oscilloscope has not been de

27、signed to make direct measurements on the human body. Users who connect a LeCroy oscilloscope directly to a person do so at their own risk. Use only indoors. Power Requirements The oscilloscope operates from a 100 V to 240V AC power source at 50 Hz to 60 Hz. No voltage selection is required, since t

28、he instrument automatically adapts to the line voltage present. Fuses The power supply of the oscilloscope is protected against short-circuit and overload by means of two 6.3 A/250 V AC “ T” -rated fuses, located above the mains plug. Disconnect the power cord before inspecting or replacing a fuse.

29、Open the fuse box by inserting a small screwdriver under the plastic cover and prying it open. For continued fire protection at all line voltages, replace only with fuses of the specified type and rating (see above). Ground The oscilloscope has been designed to operate from a single-phase power sour

30、ce, with one of the current-carrying conductors (neutral conductor) at ground (earth) potential. Maintain the ground line to avoid an electric shock. None of the current-carrying conductors may exceed 250 V rms with respect to ground potential. The oscilloscope is provided with a three-wire electric

31、al cord containing a three-terminal polarized plug for mains voltage and safety ground connection. The plugs ground terminal is connected directly to the frame of the unit. For adequate protection against electrical hazard, this plug must be inserted into a mating outlet containing a safety ground c

32、ontact. Cleaning and Maintenance Maintenance and repairs should be carried out exclusively by a LeCroy technician. Cleaning should be limited to the exterior of the instrument only, using a damp, soft cloth. Do not use chemicals or abrasive elements. Under no circumstances should moisture be allowed

33、 to penetrate the disk drive analyzer. To avoid electric shocks, disconnect the instrument from the power supply before cleaning. CAUTION Risk of electrical shock: No user-serviceable parts inside. Leave repair to qualified personnel. 2-4 General Information Power On Connect the oscilloscope to the

34、power outlet and switch it on using the power On/Standby button, located near the left-hand corner of the instrument below the screen. After the instrument is switched on, auto-calibration is performed and a test of the disk drive analyzers ADCs and memories is carried out. The full testing procedur

35、e takes approximately 10 seconds, after which time a display will appear on the screen. Specifications 3-1 Specifications 3.Instrument Architecture Overview PROCESSORS The Waverunner central processor (CPU), a PowerPC microprocessor, performs the oscilloscope s computations and controls its operatio

36、n. A range of peripheral interfaces allow you to control remotely, store waveforms and other data, and make hard copies. A support processor constantly monitors the front-panel controls. Waverunner either transfers data to display memory for direct waveform display, or stores it to reference memorie

37、s, for fast data-processing. ADCs Each Waverunner channel has an eight-bit Analog-to-Digital Converter (ADC). The instrument s ADC architecture is designed to give excellent amplitude and phase correlation, maximum analog-to-digital conversion performance, large record lengths and superior time reso

38、lution. MEMORIES Waverunner acquisition memories simplify signal acquisition by producing waveform records that allow detailed analysis over large time intervals. There are four memories for temporary storage, and four more for waveform zooming and processing. RIS The Waverunner oscilloscope capture

39、s and stores repetitive signals at a maximum Random Interleaved Sampling (RIS) rate of 25 GS/s. This advanced digitizing technique enables measurement of repetitive signals with an effective sampling interval of 40 ps, and a measurement resolution of up to 5 ps. TRIGGER SYSTEM You can control Waveru

40、nner triggering to a highly specialized degree in accordance with waveform characteristics and chosen trigger conditions. The trigger source can be any of the input channels, line (synchronized to scope s main input supply) or external. The coupling is selected from AC, LF REJect, HF REJect, HF, and

41、 DC; the slope from positive and negative. Waverunner SMART Trigger offers a wide range of sophisticated trigger modes matched to special trigger conditions and sets of conditions. AUTOMATIC CALIBRATION Waverunner automatic calibration ensures an overall vertical accuracy of typically 1 % of full sc

42、ale. Vertical gain and offset calibration, and horizontal (time) resolution take place each time you change the volts per division setting. Periodic and temperature-dependent auto-calibration ensures long-term stability at the current setting. 3-2 Specifications DISPLAY SYSTEM You control the displa

43、y s interactive, user-friendly interface using push-buttons and knobs. Display as many as eight different waveforms at once on eight separate grids. The parameters controlling signal capture are simultaneously reported. The Waverunner display presents internal status and measurement results, as well

44、 as operational, measurement, and waveform-analysis menus. The 8.4-inch color flat-panel TFT-LCD screen presents waveforms and data using advanced color management. Overlap-mixing and contrast-enhancement functions ensure that overlapping waveforms remain distinct at all times. Both pre-set and pers

45、onal color schemes are available. The Analog Persistence function offers display attributes of an analog instrument with all the advantages of digital technology. The Full Screen function expands waveform grids to fill the entire screen. A hard copy of the screen can be easily produced by pressing t

46、he front-panel PRINT SCREEN button. INTERFACE AND PANEL SETUPS Although Waverunner is a truly digital instrument, the front-panel layout and controls are similar to an analog oscilloscope s. Rapid response and instant representation of waveforms on the high-resolution screen add to this impression.

47、Four front-panel setups can be stored internally and recalled either directly or by remote control, thus ensuring rapid front-panel configuration. When power is switched off, the current front-panel settings are automatically stored for subsequent recall at the next power-on. REMOTE CONTROL Waverunn

48、er has also been designed for remote control operation in automated testing and computer-aided measurement applications. You control the entire measurement process including cursor and pulse-parameter settings, dynamic modification of front-panel settings, and display organization through the rear- panel industry-standard GPIB (IEEE-488) and standard RS-232-C ports. See this manual s Chapter 12, Use Waverunner with PC, and the Remote Control Manual. Speci