Related Manuals for National Instruments GPIB-100A
Summary of Contents for National Instruments GPIB-100A
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Page 1: User Manual
GPIB-100A User Manual March 1990 Edition Part Number 320063-01 © Copyright 1985, 1991 National Instruments Corporation. All Rights Reserved. - Page 2 National Instruments Corporation 6504 Bridge Point Parkway Austin, TX 78730-5039 (512) 794-0100 (800) IEEE-488 (toll-free U.S. and Canada) Technical support fax: (512) 794-5678...
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Page 3: Limited Warranty
The GPIB-100A is warranted against defects in materials and workmanship for a period of two years from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period. This warranty includes parts and labor. - Page 4 Be sure that the equipment is plugged into a grounded outlet and that the grounding has not been defeated with a cheater plug. 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.
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Page 5: Organization Of The Manual
Organization of the Manual This manual is divided into the following chapters: Chapter 1, Description of the GPIB-100A, contains a brief description of the GPIB-100A Bus Extender and how it is used. This section also lists all components and accessories. In addition, it provides system configuration, performance, operating, electrical, environmental, and physical specifications for the GPIB-100A. - Page 6 Preface Abbreviations Used in the Manual The following abbreviations are used in the text of this manual. kbytes Mbytes nsec GPIB-100A User Manual centigrade Fahrenheit hertz inch thousand bytes meter milliamperes million bytes millimeter microsecond nanosecond second volts Volts Alternating Current watt ©...
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Page 7: Table Of Contents
Setting the Operating Mode ... 3-2 Parallel Poll Response (PPR) Modes... 3-2 Buffered PPR Mode (Approach 1)... 3-3 Unbuffered PPR Mode (Approach 2)... 3-3 Mixed Mode Operation... 3-4 Operating the GPIB-100A System... 3-4 Chapter 4 Theory of Operation ... 4-1 Diagrams ... 4-1 Power-On ... - Page 8 EOI (end or identify) ... A-4 Physical and Electrical Characteristics ... A-5 Configuration Restrictions ... A-7 Appendix B Schematic Diagram ... B-1 Appendix C GPIB-100A Parts Locator Diagram Appendix D Cable Assembly Wire List Appendix E Multiline Interface Messages Appendix F Mnemonics Key ...
- Page 9 Contents Figures Figure 1-1. The Model GPIB-100A Bus Extender... 1-1 Figure 1-2. Typical GPIB-100A Extension System (Physical Configuration) ... 1-2 Figure 1-3. Typical GPIB-100A Extension System (Logical Configuration)... 1-2 Figure 2-1. Voltage Selection... 2-1 Figure 3-1. Switch Settings for Operating Mode ... 3-2 Figure 3-2.
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Page 10: Description Of The Gpib-100A
While the two bus systems are physically separate, as shown in Figure 1-2, devices logically appear to be located on the same bus as shown in Figure 1-3. Thus, with the GPIB-100A it is possible to overcome two configuration restrictions imposed by ANSI/IEEE Standard 488-l978, namely: •... -
Page 11: Figure 1-2. Typical Gpib-100A Extension System (Physical Configuration)
Description of the GPIB-100A Chapter 1 extension. And because the GPIB-100A is a functionally transparent extender, the same GPIB communications and control programs that work with an unextended system will work unmodified with an extended system. There is one minor exception to this transparency in conducting parallel polls, as explained in Chapter 3 in the paragraph Parallel Poll Response (PPR) Modes. -
Page 12: Gpib-100A Specifications
Chapter 1 GPIB-100A Specifications The following tables show the system configuration; the performance, operating, electrical, environmental, and physical characteristics of the GPIB-100A, as well as providing a list of available GPIB-100A components and accessories. Table 1-1. System Configuration Characteristics Characteristic... -
Page 13: Table 1-2. Performance Characteristics
Description of the GPIB-100A Table 1-2. Performance Characteristics Characteristic speed listeners functionality interlocked IEEE-488 handshake IEEE-488 capability identification codes Characteristic architecture operating modes Parallel Poll Response modes GPIB-100A User Manual Specification 250 to 135 kbytes/sec (approximately 4 sec per byte degraded at 10.5 nsec per meter of distance) no... -
Page 14: Table 1-4. Electrical Characteristics
18 W typical Specification 0 to 55 C 5 to 95% non-condensing conditions Class A verified UL Listed UL Listed and also classified by Underwriters Laboratories Inc. in accordance with International Electrotechnical Commission publication 950 Description of the GPIB-100A GPIB-100A User Manual... -
Page 15: Table 1-6. Physical Characteristics
2 meters 4 meters Single Rack-Mount Kit Dual Rack-Mount Kit Note: All part numbers in this table are National Instruments part numbers. GPIB-100A User Manual Table 1-6. Physical Characteristics Specification 3.5 x 8.5 x 13 in. (89 x 216 x 330 mm) -
Page 16: Chapter 2 Installation
GPIB-100A. Operating at a voltage other than the one selected may damage the unit. If the GPIB-100A is set at a voltage other than the one you are using, follow the steps below to change the operating voltage. -
Page 17: Grounding Configuration
Chapter 2 Grounding Configuration A U.S. standard three-wire power cable is provided with the GPIB-100A. When connected to a power source, this cable connects the equipment chassis to the power ground. The GPIB-100A is shipped from the factory with chassis and power grounds connected to the logic ground of the digital circuitry and the shields of the interfacing cables. -
Page 18: Configuration And Operation
Both units in the extension system must be set to the same mode. Talker/Listener/Controller (TLC) Mode The GPIB-100A is set at the factory to the more common TLC operating mode. The TLC mode requires a System Controller on one side of the extension. There may be any number of Talkers, Listeners, and other Controllers in the system. -
Page 19: Talker/Listener (Tl) Mode
Setting the Operating Mode Both GPIB-100As in the extension system must be set to the same operating mode. Use switch S1, position 1, on the back panel of each GPIB-100A to set the operating mode. Set the switches as shown in Figure 3-1. -
Page 20: Buffered Ppr Mode (Approach 1)
Most Controllers pulse the IDY signal for a period of time exceeding 2 sec and expect a response within that time. When used with this type of Controller, the GPIB-100A should be left in the Buffered PPR mode as set at the factory. -
Page 21: Mixed Mode Operation
Figure 3-2. Switch Settings for Parallel Poll Response Mode Operating the GPIB-100A System The GPIB-100A extension system is fully operational when power is applied to both units. In TLC mode, it is sometimes necessary to power on the System Controller last, after the extenders and all other devices are operating. -
Page 22: Chapter 4 Theory Of Operation
Chapter 4 Theory of Operation Diagrams Figure 4-1 shows a block diagram for the GPIB-100A. Refer to Appendix B for GPIB-100A schematic diagrams and Appendix C for the GPIB-100A parts locator diagram. Figure 4-1. GPIB-100A Block Diagram Power-On When the GPIB-100A is powered on, a reset pulse (PON) created by U48F, U28A/D and associated Register/Capacitor Delay (RCD) network directly or indirectly clears all flip-flops (FFs) to an initialized state. -
Page 23: System Controller Detection
During a parallel poll (U46C). The Remote Source (RS) handshake FF U36B is cleared via U33B on the following events: • Before the Active Controller is identified (TLC mode (U33A) only). GPIB-100A User Manual © National Instruments Corporation Chapter 4... -
Page 24: Parallel Polling
BUS PP is received at the local unit through U10C. When the local poll is over (ATN or EOI unasserted), FF U45B is cleared and U36D is set (via U37B/C and U26A). Setting U36D latches © National Instruments Corporation GPIB-100A User Manual... -
Page 25: Data Direction Control
The source for these data lines when they are driven is the remote unit through receivers U15 and U17 when Unbuffered PPR mode is selected (Switch S1, position 3 open) or when the RS FF is set and a remote parallel poll is not in progress (U47A and U27B). Otherwise, the source is the Buffered PPR register U16. -
Page 26: Appendix A Operation Of The Gpib
The GPIB is a bus like a typical computer bus except that the computer has its circuit cards interconnected via a backplane bus whereas the GPIB has standalone devices interconnected via a cable bus. © National Instruments Corporation GPIB-100A User Manual... -
Page 27: System Controller And Active Controller
The interface bus consists of 16 signal lines and 8 ground return or shield drain lines. The 16 signal lines are divided into three groups: • 8 data lines • 3 handshake lines • 5 interface management lines GPIB-100A User Manual © National Instruments Corporation Appendix A... -
Page 28: Data Lines
NRFD (not ready for data) NRFD indicates when a device is ready or not ready to receive a message byte. The line is driven by all devices when receiving commands and by Listeners when receiving data messages. © National Instruments Corporation DIO5* DIO6*... -
Page 29: Ndac (Not Data Accepted
The EOI line has two purposes. The Talker uses the EOI line to mark the end of a message string. The Active Controller uses the EOI line to tell devices to identify their responses in a parallel poll. GPIB-100A User Manual © National Instruments Corporation... -
Page 30: Physical And Electrical Characteristics
This design allows devices to be connected in either a linear or a star configuration, or a combination of the two. See Figures A-2 and A-3. Figure A-2. Linear Configuration of the GPIB Devices © National Instruments Corporation GPIB-100A User Manual... -
Page 31: Figure A-3. Star Configuration Of Gpib Devices
The GPIB uses negative logic with standard TTL logic levels. When DAV is true, for example, it is a TTL low level ( 0.8 V), and when DAV is false, it is a TTL high level ( 2.0 V). GPIB-100A User Manual © National Instruments Corporation... -
Page 32: Configuration Restrictions
National Instruments provides two extenders which allow longer cable spans. These products are the GPIB-100A and the GPIB-110. Both must be used in pairs, one at each end of the extension cable. The GPIB-100A, a parallel extender, relays the instantaneous status of all GPIB signals over an RS- 422-compatible cable. -
Page 33: Appendix B Schematic Diagram
Appendix B Schematic Diagram This appendix contains the schematic diagram for the GPIB-100A. © National Instruments Corporation GPIB-100A User Manual... -
Page 35: Gpib-100A Parts Locator Diagram
Appendix C GPIB-100A Parts Locator Diagram This appendix contains the parts locator diagram for the GPIB-100A. The parts locator diagram shows the locations of the GPIB-100A configuration jumpers and switches. Figure C-1. GPIB-100A Parts Locator Diagram © National Instruments Corporation... -
Page 36: Appendix D Cable Assembly Wire List
Appendix D Cable Assembly Wire List This appendix contains the wire list for the GPIB-100A Transmission Cable. © National Instruments Corporation GPIB-100A User Manual... -
Page 37: Table D-1. Cable Assembly Wire List
Table D-1. Cable Assembly Wire List... - Page 38 Appendix E Multiline Interface Command Messages The following tables are multiline interface messages (sent and received with ATN TRUE). © National Instruments Corporation GPIB-100A User Manual...
- Page 39 Hex Oct ASCII Msg Message Definitions Device Clear Group Execute Trigger Go To Local Local Lockout My Listen Address GPIB-100A User Manual Hex Oct My Secondary Address My Talk Address Parallel Poll Configure Parallel Poll Disable Appendix E ASCII Msg...
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Page 40: Multiline Interface Messages
Appendix E Multiline Interface Messages Hex Oct Dec ASCII Parallel Poll Enable Parallel Poll Unconfigure Selected Device Clear Serial Poll Disable © National Instruments Corporation Multiline Interface Command Messages MTA0 MTA1 MTA2 MTA3 MTA4 MTA5 MTA6 MTA7 MTA8 MTA9 MTA10... -
Page 41: Appendix F Mnemonics Key
Appendix F Mnemonics Key This appendix contains a mnemonics key that defines the mnemonics (abbreviations) used throughout this manual. Mnemonic ASCII NDAC NRFD © National Instruments Corporation Definition American Standard Code for Information Interchange Attention Controller Controller-In-Charge Bit Data Valid Data... - Page 42 Mnemonics Key Mnemonic GPIB-100A User Manual Definition Remote Enable Ready for Data Remote Response Remote Source Remote System Controller Service Request Talker Talker/Listener Talker/Listener/Controller (GPIB Adapter) Transistor/Transistor Logic © National Instruments Corporation Appendix F...
- Page 43 User 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-100A User Manual Edition Date March 1990 Part Number: 320063-01 Please comment on the completeness, clarity, and organization of the manual.