lecroy LEC LW400, LW400A Series AWG Remote Programmers 电路图.pdf

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1、LeCroy WaveStation LW4001LW400A Series AWG Remote Programmers Manual August 1996 Rev. C RadioFans.CN 收音机爱 好者资料库 LeCroy Corporate Headquarters 700 Chestnut Ridge Road Chestnut Ridge, NY 10977-6499 Tel: (914) 578-6020, FAX: 578-5985 European Headquarters Mannheimerstrasse 175 D-69123 Heidelberg, Germa

2、ny Tel: (49) 6221 840989 FAX: (49) 6221 833827 European Manufacturing 2, rue du Pr6-de-la-Fontaine P.O. Box 341 1217 Meyrin 1/Geneva, Switzerland Tel: (41) 22 719 21 11, FAX: 22 782 39 Copyright August 1996, LeCroy. All dghts reserved. Information in this publication supersedes all earlier versions.

3、 Specifications subject to change. LeCroy Is a registered trademark of LeCroy Corporation WaveStation is a registered trademark of LeCroy Corporation Centronics is a registered trademark of Data Computer Corp. Citizen is a registered trademark of Citizen America Corp. Epson is a registered trademark

4、 of Epson Amedca Inc. Hewlett-Packard is a registered trademark, and HP TM is a trademark of Hewlett-Packard, Co. IBM is a registered trademark, and IBM PC/XT r, PC/AT TM and PSI2TM are trademarks of International Business Machines Corporation. MATHCAD is a registered trademark of MATHSOFT INC. MATL

5、AB is a registered trademark of MATHWORKS PSPICE is a registered trademark of MICROSIM Corporation Smart Trigger TM is a trademark of LeCroy Corporation Microsoft, MS-DOS, QuickBasic, Excel and Windows are trademarks of Microsoft Corporation. PCX is a file format developed by ZSoft Corporation for u

6、se with PC Paint programs. Bubble Jet is a registered trademark of Canon USA, Incorporated. Apple and Macintosh are registered trademarks of Apple Computer, Incorporated. RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS I SECTION 1 GENERAL INFORMATION Initial Inspection . 1-1 Warranty .1-1 Product Assistan

7、ce .1-1 Maintenance Agreements .1-2 Service Procedure .1-2 Return Procedure .1-2 How to Use This Manual .1-3 Introduction .1-5 What is SCPI . 1-5 SECTION 2 ABOUT REMOTE CONTROL Interface Configuration and Special Commands .2-1 GPIB Remote Control .2-1 GPIB Signals and Lines .2-1 Setting the GPIB Add

8、ress .2-1 GPIB Remote Control and Hardcopy Operation .2-2 Remote Control Operation over GPIB .2-2 End or Identity (EOI) Operation .2-2 Hardcopy Operation over GPIB .2-2 IEEE-488 Standard Messages .2-3 Checking GPIB Communications Using National Instruments IBIC Program .2-5 Error Code .2-7 SECTION 3

9、 INSTRUMENT MODEL AND SUBSYSTEM HIERARCHY Remote Command System Model .3-1 Introduction to SCPI Command Syntax .3-1 Command Subsystems .3-4 Overview of OUTPut Commands .3-5 Overview of WAVE Commands .3-5 Overview of FGEN Commands .3-11 Overview of EQUation Commands .3-14 Overview of DISPlay Commands

10、 .3-15 Overview of HCOPy Commands .3-17 RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS Overview of TRIGger Commands .3-18 Overview of MMEMory Commands .3-19 Overview of PROJect Commands .3-20 Overview of SYSTem Commands . 3-21 Overview of STATus Commands .3-22 488.2 Command Commands .3-23 SECTION 4 STATU

11、S the WaveStation is the only talker and all connected devices must be listeners (i.e., printers/plotters must be in Listen Only mode). 2-2 I ABOUTREMOTE CONTROL I Talk/Listen IEEE-488 Standard Messages Serial Poll Function Receiving the Trigger Message Interface Clear If hardcopy destination is GPI

12、B and then sending the HCOPy command over the GPIB bus will cause the WaveStation to send the hardcopy output to the host computer as a response message. In this mode, the WaveStation will wait to be addressed to talk before sending the hardcopy data. The host computer then has three options in gene

13、rating the hardcopy: 1) The host computer may read the data into internal memory and then send the data to a printer/plotter. 2) The host computer may send the HCOPy remote command and then address the printer to listener and the WaveStation to talk and read the data from the WaveStation. As the dat

14、a is read into the computer, it is also printed to the printer which is a listener. 3) The host computer may send the HCOPy remote command and then address the printer/plotter to listen, the WaveStation to talk, and the controller to go into stand-by mode waiting for EOI. This section explains how t

15、he WaveStation reacts to the Standard 488.2 messages. The WaveStation implements a full Serial Poll Interface Function: 1. It can assert the SRQ (Service Request) control line. 2. It will respond with the current serial poll byte or STB when addressed to Talk and after the Serial Poll Enable interfa

16、ce message is received. 3. After transmitting its status message, the WaveStation stops asserting the SRQ line and clears its intemal status byte. The WaveStation responds to the Trigger message *IRG command by triggering the output waveform. It is executed after all previously received commands hav

17、e been processed. The Interface Clear message (asserting IFC line) is an asynchronous control line that causes all bus activity to halt. When the WaveStation receives the IFC message, it becomes unaddressed, stops talking or listening, and will not participate in future bus transactions until readdr

18、essed to talk or listen. 2-3 4BOUT REMOTE CONTROL Device Clear (Selective or Universal) Go to Local, Go to Remote, Go to Remote with Lockout Local The WaveStation will respond to a Selective Device Clear or a Universal Device Clear interface message. The former requires that the WaveStation first be

19、 addressed to listen, followed by the Selective Device Clear message. The latter does not require that the instrument be previously addressed to listen. Device Clear causes the input buffer, the output queue, and the message available (MAV) status bit to be cleared. The WaveStation can operate in Lo

20、cal or Remote mode. In Local mode, all front panel controls are operational and commands from the host computer will also be processed. In Remote mode, the WaveStation operates under computer control and no front panel controls are operational except the Local soft key (if enabled). The WaveStation

21、always powers on in Local mode). Note: The WaveStation processes all messages regardless of being in Remote or Local modes. The WaveStation switches to Remote mode (with Local soft key enabled) when the WaveStation receives a command with the REN line asserted. All instrument settings remain unchang

22、ed during local-to-remote transitions. The WaveStation screen indicates that Remote mode is enabled by the appearance of the Local soft key. No other front panel controls operate. If the WaveStation is under remote control and the Local soft key is pressed, the instrument interrupts program control

23、and returns to local control. Data and/or settings cannot be changed locally. Caution:. In Local Lockout state, all front panel keys and knobs are disabled. Once Remote with Local Lockout is set using the RWLS or LLO commands it can only be cleared when the WaveStation is put into Local mode by send

24、ing the LOC command or readdressing the WaveStation with REN deasserted. 2-4 I ABOUTREMOTECONTROLI Checking GPIB Communications Using National Instruments IBIC Program This quick checkout requires a computer with a National Instrument GPIB card and the National Instruments IBIC program supplied by N

25、ational Instruments with the purchase of a GPIB card. This quick checkout also assumes that the GPIB card is already installed in the computer and has passed all test successfully. For help installing or configuring the National Instruments GPIB card please contact National Instruments at (800) IEEE

26、-488 or (512) 794-0100. These example instructions are for an IBM-PC or compatible computer. The method for other computers is very similar. Change to the National Instruments GPIB-PC subdirectory with the command: CD GPIB-PC Start the IBIC program by with the command: IBIC Tell the IBIC program the

27、 address of the WaveStation (we assume address 1) with the command: IBFIND DEV1 Send the identify command to the WaveStation with the command: IBWRT *IDN? Read the id of the WaveStation with the command: IBRD 100 2-5 I ABOUT REMOTE CONTROL I The WaveStation response should have included the model nu

28、mber, serial number and other information. The full IBIC sequence should look as follows: National Imstruments Interface BUS Interactive Control Program (IBIC) Type help ! for help. : IBFIND DEVI , devl: IBWRT * IDN? 0100 ( cmpl count: 55 devl: IBRD 100 2100 ( end cmpl ) count: 31 4C 65 43 72 6F 79

29、2C 4C 57 34 30 302c4c5734 32 302f 55 31 3030 30 2C31 2e34 2e32 0a L e C r o y , L W 4 0 0. L W 4 2 0 / U 1 0 0 0 , 1 , 4 . 2 . If IBIC retumed an error on any of the commands, double check to make sure you typed the command exactly as given above, then consult the National Instruments GPIB-PC manual

30、 for help interpreting the error codes. A brief list of some of the common errors and possible solutions follows: 2-6 I ABOUT REMOTECONTROL I Error Code EDVR ENOL EARG ESAC EABO ENEB Check Check that config.sys contains the line: device = c:dirkGPIB.COM where dir is the directory that contains GPIB.

31、COM. No listener. Check IBFIND DEVx matches the GPIB address of the WaveStation. Where the WaveStation GPIB address is x. Invalid argument. Check that the command was typed correctly. GPIB board is not system controller. Check to make sure the GPIB board is configured as controller using IBCONF. Che

32、ck that the WaveStation is powered on and cables are connected securely. Cant find GPIB board. Check GPIB installation and configuration. In Case of GPIB Communications Problems Check the Following: 1. WaveStation is tumed on, and finished booting up. 2. WaveStation passes power up self tests. 3. GP

33、IB board is installed and passes all tests. (See National Instruments IBTEST). 4. GPIB cable is connected securely. 5. GPIB address is set correctly. 6. No other instrument on the GPIB bus is set to the same address. 7. GPIB name (DEV1) set in IBFIND command corresponds to the name given in the IBCO

34、NF device map for address 1. 2-7 4BOUT REMOTE CONTROL This page left intentionally blank 2-8 3 I INSTRUMENT MODEL AND 1 I SUBSYSTEMHIERARCHY Remote Command System Model It is important to understand the remote control subsystem hierarchy in order to rapidly locate the desired command and associated

35、message you require. Figure 1 shows the functional block diagram of the arbitrary waveform generator as viewed by the remote programming interface. The structure of the instrument subsystems is closely related to this block diagram. FGENeraor PROJectMMEMory TRIGgerEQUation f BUTPu I 4, I ISPtay I HC

36、Iqpy Figure I Introduction to SCPI Command SyntaxSCPI commands are English language based ASCII text strings. The SCPI command set is based on a hierarchical model of a generic instrument. The instrument is broken down into major system elements like OUTPUT, DISPLAY, etc. The command follows a path

37、from major functional elements down through 3-1 Instrument Model and Subsystem l-llerarchy subsystems, to specific functions within the subsystem. For example to turn on Channel ls 1 MHz output bandwidth limit filter the command would be: OUTPutl:FILTer: FREQuency 1E6 The command is shown in its lon

38、g (or verbose) form. As with all commands described in this manual, the uppemase letters indicate the characters required to represent the short form of the command. Note that SCPI instruments are not case sensitive, the use of capitalization in this manual is only intended to show the difference be

39、tween the long and short forms of the command. Note also that the short form and long form are the only acceptable forms of a command. So, for frequency we can send freq or frequency but not frequ, for example. The short form is the first four letters, unless the fourth is a vowel, in which case the

40、 short form is the first three letters. Keywords are separated by colons, while arguments use a space as a delimiter. Multiple commands can be included in a single multi-element command by using a semi-colon to separate each element. Multiple elements within the same command may be abbreviated if ea

41、ch element is within the same subsystem. The second element in a multi-element command must be preceded with a colon if it is not within the same subsystem. Commands enclosed in square brackets indicate default subsystems. For example, OUTPutl:STAte ON is equivalent to OUTPut1 ON. 3-2 Instrument Mod

42、el andI Subsystem Hierarchy I These are four valid WaveStation commands under two different subsystems. The WAVE and OUTPut subsystems. WAVE:SELECT chl - Enable channel 1 editor WAVE:OPEN new_wave - Select waveform new_wave OUTPut1 :FILTer:FREQuency 1 E6 - Enables the Channel 1 MHz Bandwidth filter

43、OUTPut1 on - Enables channel 1 output The above commands may be sent to the WaveStation one command at a time or they may be combined into a single multi- element command. Following are valid forms for a multi-element command. Each element in the command is separated by semi- colon. WAVE:SELECT chl ;OPEN new_wave OUTPut1 :FILTer:FREQ