National Instruments GPIB-140 Series User Manual
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National Instruments GPIB-140 Series User Manual

National Instruments GPIB-140 Series User Manual

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National Instruments GPIB-140 Series User Manual

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  • Page 1 (217) 352-9330 | Click HERE Find the National Instruments GPIB-140 at our website:...
  • Page 2 GPIB-140 User Manual June 1995 Edition Part Number 320911B-01 © Copyright 1995 National Instruments Corporation. All Rights Reserved.
  • Page 3 National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin, TX 78730-5039 (512) 794-0100 Technical support fax: (800) 328-2203 (512) 794-5678 Branch Offices: Australia 03 9 879 9422, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Canada (Ontario) 519 622 9310, Canada (Québec) 514 694 8521,...
  • Page 4 The reader should consult National Instruments if errors are suspected. In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it.
  • Page 5 Any use or application of National Instruments products for or involving medical or clinical treatment must be performed by properly...
  • Page 6 FCC/DOC Radio Frequency Interference Compliance This equipment generates and uses radio frequency energy and, if not installed and used in strict accordance with the instructions in this manual, may cause interference to radio and television reception. This equipment has been tested and found to comply with the following two regulatory agencies: Federal Communications Commission This device complies with Part 15 of the Federal Communications Commission (FCC)
  • Page 7 Instruments could void the user’s authority to operate the equipment under the FCC Rules. If necessary, consult National Instruments or an experienced radio/television technician for additional suggestions. The following booklet prepared by the FCC may also be helpful: How to Identify and Resolve Radio-TV Interference Problems. This booklet is available from the U.S.

  • Page 8: Table Of Contents

    Immediate PPR Mode ............... 3-4 Latched PPR Mode................3-4 Choosing the PPR Mode ..............3-4 Setting the PPR Mode ............... 3-5 Operating the Extension System..............3-5 POWER LED ..................3-5 LINK LED ..................3-6 ERROR LED..................3-6 © National Instruments Corp. GPIB-140 User Manual...
  • Page 9 Case 2: Talker Is HS488 Capable, But Listener Is Not HS488 Capable ................C-5 Case 3: Talker Is Not HS488 Capable, But Listener Is HS488 Capable ................C-6 System Configuration ..................C-6 Appendix D Multiline Interface Messages ................D-1 GPIB-140 User Manual viii © National Instruments Corp.
  • Page 10 System Configuration ................B-1 Table B-2. Performance Characteristics ..............B-1 Table B-3. Operation Characteristics ..............B-2 Table B-4. Electrical Characteristics............... B-2 Table B-5. Environmental Characteristics .............. B-2 Table B-6. Physical Characteristics ................ B-3 © National Instruments Corp. GPIB-140 User Manual...

  • Page 11: About This Manual

    About This Manual This manual describes how to install, configure, and operate the National Instruments GPIB -140 or GPIB-140/2 bus extender. Organization of This Manual This manual is organized as follows: • Chapter 1, Introduction, lists what your kit should contain and optional equipment you can order, and gives a brief description of the GPIB extender.

  • Page 12: Conventions Used In This Manual

    <Control-Alt-Delete>. GPIB-140 GPIB-140 refers to a National Instruments GPIB extender that extends the GPIB to a maximum distance of 1 km. GPIB-140/2 GPIB-140/2 refers to a National Instruments GPIB extender that extends the GPIB to a maximum distance of 2 km.

  • Page 13: Related Documentation

    Protocols, and Common Commands Customer Communication National Instruments wants to receive your comments on our products and manuals. We are interested in the applications you develop with our products, and we want to help if you have problems with them. To make it easy for you to contact us, this manual contains comment and configuration forms for you to complete.

  • Page 14: Chapter 1 Introduction

    One of the following standard 3-wire power cables: 100-120 VAC 220-240 VAC Optional Equipment You can contact National Instruments to order any of the following equipment to go with your kit. Transmission cable: • Type T7 fiber optic cable – up to 1 km (used with GPIB-140) Type T8 fiber optic cable –...

  • Page 15: Hardware Description

    Figure 1-1. Typical Extension System (Physical Configuration) GPIB Computer Printer Multimeter Signal Generator (System Controller, (Listener) (Talker and Listener) (Listener) Talker, and Listener) Unit Under Test Figure 1-2. Typical Extension System (Logical Configuration) GPIB-140 User Manual © National Instruments Corp.
  • Page 16 GPIB communications and control programs that work with an unextended system can work with an extended system. The Parallel Poll Response (PPR) Modes section of Chapter 3, Configuration and Operation , discusses one minor exception to this transparency in conducting parallel polls . © National Instruments Corp. GPIB-140 User Manual...

  • Page 17: Chapter 2 Connection

    Connect the connector marked T (transmit) to the connector marked TRANS on the side panel of the GPIB extender. Connect the connector marked R (receive) to the connector marked RCVR on the side panel of the GPIB extender. © National Instruments Corp. GPIB-140 User Manual...

  • Page 18: Step 2. Switch On Your Gpib Extender

    LINK LED comes on only when both extenders are on and the fiber optic cable has been properly connected between them. If the POWER LED does not come on immediately, check to make sure that power is supplied to the extender. GPIB-140 User Manual © National Instruments Corp.

  • Page 19: Optional Self-Test

    Figure 2-3. GPIB Extender Configured for Optional Self-Test At this point, the LINK LED should light up, indicating that the cable has been connected. The ERROR LED should remain off to show that the GPIB extender is operating properly. © National Instruments Corp. GPIB-140 User Manual...

  • Page 20: Configuration And Operation

    Use switch position 1 on the DIP switch of each GPIB extender to set the data transfer mode. Slide the switch down to the ON position to set buffered mode; slide the switch up to set unbuffered mode. See Figure 3-1. © National Instruments Corp. GPIB-140 User Manual...

  • Page 21: Hs488 Mode

    HS488 protocol with the GPIB extender, the GPIB cable length should be set to 5 m in the configuration utility of your IEEE 488.2 driver software for both the local and the remote system. GPIB-140 User Manual © National Instruments Corp.

  • Page 22: Setting The Hs488 Mode

    If you are able to do this, it is the easiest solution. For more information about this option, see the Immediate PPR Mode section, later in this chapter. If you are using National Instruments IEEE 488.2 driver software, you can use your software configuration utility to set the amount of time the Controller waits.

  • Page 23: Immediate Ppr Mode

    When used with this type of Controller, the GPIB extender should use latched PPR mode if the cable between the extenders is longer than 60 m. For shorter cable distances, you should use immediate PPR mode. GPIB-140 User Manual © National Instruments Corp.

  • Page 24: Setting The Ppr Mode

    Three indicator LEDs labeled POWER, LINK, and ERROR, give information about the operational status of the GPIB extender. POWER LED The POWER LED is lit whenever power is supplied to the GPIB extender and the power switch is in the ON position. © National Instruments Corp. GPIB-140 User Manual...

  • Page 25: Link Led

    The ERROR LED is lit if the GPIB extender receives corrupted data. The ERROR LED turns off after the GPIB extender starts re-transmission and has received the first re -transmitted data byte without error. GPIB-140 User Manual © National Instruments Corp.

  • Page 26: Chapter 4 Theory Of Operation

    Figure 4-1 shows a model of a GPIB extender. The extender is made up of five layers. Each layer can be connected to the corresponding layer of another extender at the remote side to form a complete link. © National Instruments Corp. GPIB-140 User Manual...

  • Page 27: Message Interpreter Layer

    GPIB. At the same time, it monitors the activities occurring on the GPIB and translates them into equivalent GPIB local and remote messages. These messages are sent to the Packet Translation Layer. GPIB-140 User Manual © National Instruments Corp.

  • Page 28: Packet Translation Layer

    Physical Layer, reconstructs them back into packets, and presents them to the Link Management Layer. Physical Layer The Physical Layer handles the transmitting and receiving of serial data over the fiber optic link. © National Instruments Corp. GPIB-140 User Manual...

  • Page 29: Appendix A Operation Of The Gpib

    (Controller) monitors the communications network (GPIB). When the center (Controller) notices that a party (device) wants to make a call (send a data message), it connects the caller (Talker) to the receiver (Listener). © National Instruments Corp. GPIB-140 User Manual...

  • Page 30: The Controller-In-Charge And System Controllers

    The eight data lines, DIO1 through DIO8, carry both data and command messages. All commands and most data use the 7-bit ASCII or ISO code set, in which case the eighth bit, DIO8, is unused or used for parity. GPIB-140 User Manual © National Instruments Corp.

  • Page 31: Handshake Lines

    Any device can drive the SRQ line to request service from the Controller asynchronously. EOI (end or identify) Talker uses the EOI line to mark the end of a data message. Controller uses the EOI line when it conducts a parallel poll. © National Instruments Corp. GPIB-140 User Manual...

  • Page 32: Physical And Electrical Characteristics

    NRFD GND (TW PAIR W/NRFD) NDAC GND (TW PAIR W/NDAC) GND (TW PAIR W/IFC) GND (TW PAIR W/SRQ) GND (TW PAIR W/ATN) SHIELD SIGNAL GROUND Figure A-1. GPIB Connector and the Signal Assignment GPIB-140 User Manual © National Instruments Corp.

  • Page 33: Configuration Requirements

    The following restrictions are typical. • A maximum separation of 4 m between any two devices and an average separation of 2 m over the entire bus. © National Instruments Corp. GPIB-140 User Manual...
  • Page 34 Operation of the GPIB Appendix A • A maximum total cable length of 20 m. • No more than 15 devices connected to each bus, with at least two-thirds powered on. GPIB-140 User Manual © National Instruments Corp.

  • Page 35: Appendix B Specifications

    Complete Listener Complete Service Request Complete Remote Local PP1,2 Complete Parallel Poll Complete Device Clear Complete Device Trigger C1-5 Complete Controller Tri-state GPIB driver HS488 capability identification HS488 Source Handshake codes HS488 Acceptor Handshake © National Instruments Corp. GPIB-140 User Manual...

  • Page 36: Table B-3. Operation Characteristics

    220-240 VAC, 500 mA, IEC approved Table B-5. Environmental Characteristics Characteristic Specification Operating temperature 0° to 40° C Storage temperature -20° to 70° C Humidity 10% to 90% noncondensing conditions FCC Class A Verified GPIB-140 User Manual © National Instruments Corp.

  • Page 37: Table B-6. Physical Characteristics

    Duplex style, terminated with ST-style connectors Transmission cable for the 3.0 x 6.5 mm cable diameter GPIB-140/2 62.5/125 micron core/clad with NA=0.275 1300 nm operating wavelength 1 dB/km attenuation Duplex style, terminated with ST-style connectors © National Instruments Corp. GPIB-140 User Manual...

  • Page 38: Appendix C Introduction To Hs488

    Controller. No Changes to the IEEE 488.2 Standard The HS488 protocol requires no changes to the IEEE 488.2 standard. HS488 devices do not need to be 488.2 compliant. © National Instruments Corp. GPIB-140 User Manual...

  • Page 39: No Added Cabling Restrictions Beyond Ieee 488.1

    At the beginning of each data transfer, the HS488 source and acceptor functions determine whether all active Talkers and Listeners are capable of HS488 transfers. If the addressed devices are HS488 capable, they use the HS488 GPIB-140 User Manual C- 2 © National Instruments Corp.

  • Page 40: Figure C-1. Ieee 488.1 And Hs488 Transfers

    The following sections describe the sequence of events for data transfers that involve HS488 devices. There are three HS488 transfer cases: • Talker is HS488—Listener is HS488. • Talker is HS488—Listener is not HS488. • Talker is not HS488—Listener is HS488. © National Instruments Corp. GPIB-140 User Manual...

  • Page 41: Case 1: Talker And Listener Are Hs488 Capable

    HSC message false. To send the HSC message false, the Talker unasserts the NRFD signal. When the Talker has a byte ready to send, it drives the data on the DIO signal lines, allows some settling time, and asserts DAV. GPIB-140 User Manual C- 4 © National Instruments Corp.

  • Page 42: Case 2: Talker Is Hs488 Capable, But Listener Is Not Hs488

    Step 7: The IEEE 488.1 Listener enters ACDS and asserts NRFD. Because of this behavior, the Talker determines that the addressed Listener is not capable of HS488 transfers. The Talker sources bytes using the IEEE 488.1 protocol. © National Instruments Corp. GPIB-140 User Manual...

  • Page 43: Case 3: Talker Is Not Hs488 Capable, But Listener Is Hs488

    The Secondary Command has the bit pattern 6n hex, where n is the meters of cable in the system. The Secondary Command Group includes CFG1-CFG15 in Appendix D, Multiline Interface Messages. GPIB-140 User Manual C- 6 © National Instruments Corp.

  • Page 44: Multiline Interface Messages

    ATN asserted. The interface functions include initializing the bus, addressing and unaddressing devices, and setting device modes for local or remote programming. For more information on these messages, refer to the ANSI/IEEE Standard 488.1-1987, IEEE Standard Digital Interface for Programmable Instrumentation. © National Instruments Corp. GPIB-140 User Manual...
  • Page 45 Parallel Poll Configure Group Execute Trigger Parallel Poll Disable Go To Local Local Lockout † This multiline interface message is a proposed extension to the IEEE 488.1 specification to support the HS488 high-speed protocol. GPIB-140 User Manual © National Instruments Corp.
  • Page 46 MTA24 MSA24,PPD MTA25 MSA25,PPD MTA26 MSA26,PPD MTA27 MSA27,PPD MTA28 MSA28,PPD MTA29 MSA29,PPD MTA30 MSA30,PPD Parallel Poll Enable Serial Poll Enable Parallel Poll Unconfigure Take Control Selected Device Clear Unlisten Serial Poll Disable Untalk © National Instruments Corp. GPIB-140 User Manual...

  • Page 47: Appendix E Customer Communication

    Filling out a copy of the Technical Support Form before contacting National Instruments helps us help you better and faster. National Instruments provides comprehensive technical assistance around the world. In the U.S.
  • Page 48 If you are using any National Instruments hardware or software products related to this problem, include the configuration forms from their user manuals. Use additional pages if necessary.
  • Page 49 The problem is List any error messages The following steps will reproduce the problem...
  • Page 50 National Instruments Products • GPIB Extender and Revision Number – GPIB-140 Revision –GPIB-140/2 Revision • DIP Switch Settings • National Instruments GPIB Interface • National Instruments Software Other Products • Computer Make and Model • Operating System Version •...
  • Page 51 Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products. This information helps us provide quality products to meet your needs. Title: GPIB-140 User Manual Edition Date: June 1995 Part Number: 320911B-01 Please comment on the completeness, clarity, and organization of the manual.
  • Page 52 If you find errors in the manual, please record the page numbers and describe the errors. Thank you for your help. Name Title Company Address Phone Mail to: Technical Publications National Instruments Corporation 6504 Bridge Point Parkway, MS 53-02 Austin, TX 78730-5039 Fax to: Technical Publications National Instruments Corporation MS 53-02 (512) 794-5678...

  • Page 53: Glossary

    End of String Farads Federal Communications Commission FIFO first-in-first-out grams GPIB General Purpose Interface Bus hexadecimal hertz Identify International Electrotechnical Commission IEEE Institute of Electrical and Electronic Engineers Interface Clear pounds light-emitting diode © National Instruments Corp. G- 1 GPIB-140 User Manual...
  • Page 54 Numerical Aperture NDAC Not Data Accepted NRFD Not Ready For Data Parallel Poll Response random-access memory Remote Enable seconds Service Request transistor-transistor logic Underwriters Laboratories volts alternating current GPIB-140 User Manual G- 2 © National Instruments Corp.

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Gpib-140/2

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