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National Instruments GPIB-BUF - page 1
© Copyright 1989, 1994 National Instruments Corporation. All Rights Reserved. GPIB-BUF User Manual February 1994 Edition Part Number 320125-01 ...
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National Instruments GPIB-BUF - page 2
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) 879 9422, Austria (0662) 435986, Belgium 02/757.00.20, Canada (Ontario) (519) 622-9310, Canada (Québec) (514) 694-8521, Denmark 45 76 26 00, Finland (90) 527 ...
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National Instruments GPIB-BUF - page 3
MicroGPIB Products National Instruments has developed the MicroGPIB product line to offer a series of high performance, low cost IEEE 488 support items that are packaged in small all-metal cases, capable of being rack mounted. Limited Warranty The GPIB-BUF is warranted against defects in materials and workmanship for a period of two years from the ...
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National Instruments GPIB-BUF - page 4
action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover damages, defects, malfunctions, or service failures caused by owner’s failure to follow the National Instruments installation, operation, or maintenance instructions; owner? ...
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National Instruments GPIB-BUF - page 5
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: Fe ...
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National Instruments GPIB-BUF - page 6
There is no guarantee that interference will not occur in a particular installation. However, the chances of interference are much less if the equipment is installed and used according to this instruction manual. If the equipment does cause interference to radio or television reception, which can be determined by turning the equipment on and off, o ...
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National Instruments GPIB-BUF - page 7
© National Instruments Corp. v i i GPIB-BUF User Manual Contents About This Manual .......................................................................... i x Introduction to the GPIB-BUF .................................................. . i x Organization of This Manual ...................................................... i x Conventions Us ...
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National Instruments GPIB-BUF - page 8
Contents GPIB-BUF User Manual v i i i © National Instruments Corp. Appendix A Hardware Specifications .............................................................. A -1 Appendix B Customer Communication .......................................................... B - 1 Glossary ....................................................................... ...
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National Instruments GPIB-BUF - page 9
© National Instruments Corp. i x GPIB-BUF User Manual About This Manual Introduction to the GPIB-BUF The GPIB-BUF is one of National Instruments family of MicroGPIB products. These products are high-performance, low-cost IEEE 488 support items, packaged in small all-metal cases, capable of being rack mounted. Organization of This Manual This manua ...
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National Instruments GPIB-BUF - page 10
About This Manual GPIB-BUF User Manual x © National Instruments Corp. Conventions Used in This Manual The following conventions are used in this manual. italic Italic text denotes emphasis, a cross reference, or an introduction to a key concept. bold italic Bold italic text denotes a note, caution, or warning. bold Bold text denotes the name of li ...
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National Instruments GPIB-BUF - page 11
© National Instruments Corp. 1 -1 GPIB-BUF User Manual Chapter 1 Description of the GPIB-BUF This chapter contains general information about the National Instruments GPIB-BUF and lists components and accessories. Introduction The GPIB-BUF, shown in Figure 1-1, is an IEEE 488 (GPIB) data buffer which increases GPIB performance by isolating a slow G ...
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National Instruments GPIB-BUF - page 12
Description of the GPIB-BUF Chapter 1 GPIB-BUF User Manual 1 -2 © National Instruments Corp. The GPIB-BUF has two isolated GPIB ports and is placed in-line between a GPIB system and a single, slower GPIB device (usually a printer or plotter). The GPIB-BUF automatically buffers all device-dependent data sent to the slower device. Because the GPIB-B ...
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National Instruments GPIB-BUF - page 13
Chapter 1 Description of the GPIB-BUF © National Instruments, Corp. 1 -3 GPIB-BUF User Manual The GPIB-BUF Front Panel The power switch and six Light Emitting Diodes (LEDs) are mounted on the GPIB-BUF front panel. Figure 1-2 shows the front panel of the GPIB -BUF. GPIB-BUF IEEE-488 IEEE-488 BUFFER POWER READY T ALK LISTEN EMPTY FULL NA TIONAL INST ...
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National Instruments GPIB-BUF - page 14
Description of the GPIB-BUF Chapter 1 GPIB-BUF User Manual 1 -4 © National Instruments Corp. The GPIB-BUF Rear Panel Figure 1-3 shows the power cable and the GPIB cables connected to the rear panel of the GPIB-BUF. Figure 1-3. The GPIB-BUF Rear Panel The GPIB Connectors The GPIB-BUF has two GPIB connectors labeled GPIB IN and GPIB OUT. Both GPIB c ...
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National Instruments GPIB-BUF - page 15
Chapter 1 Description of the GPIB-BUF © National Instruments, Corp. 1 -5 GPIB-BUF User Manual The port labeled GPIB IN is intended to be connected to a GPIB system that includes one or more GPIB devices which send data to the GPIB target device. All data received via the GPIB IN port is transferred into the Random Access Memory (RAM) buffer of the ...
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National Instruments GPIB-BUF - page 16
© National Instruments Corp. 2 -1 GPIB-BUF User Manual Chapter 2 Installation and Operation This chapter describes the procedures for installing and operating the GPIB -BUF. Figure 2-1 shows an example of a GPIB-BUF connected to a GPIB system. This example shows a GPIB-BUF placed in a GPIB system with a GPIB Talker/Controller, such as an IBM-PC wi ...
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National Instruments GPIB-BUF - page 17
Installation and Operation Chapter 2 GPIB-BUF User Manual 2 -2 © National Instruments Corp. Installation Install the GPIB-BUF according to the following procedure. 1 . Inspect the GPIB-BUF. 2 . Verify the voltage requirement. 3 . Configure th e operating parameters. 4 . Connect the cables. 5 . Power on the unit. These steps are described in more d ...
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National Instruments GPIB-BUF - page 18
Chapter 2 Installation and Operation © National Instruments Corp. 2 -3 GPIB-BUF User Manual Step 3. Configure the Operating Parameters The GPIB-BUF is shipped from the factory configured to operate at a GPIB primary address of 5 with the SRQ-on-empty function disabled and device clear recognition and pass through enabled. The address specified on ...
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National Instruments GPIB-BUF - page 19
Installation and Operation Chapter 2 GPIB-BUF User Manual 2 -4 © National Instruments Corp. Set Configuration Switches Use the DIP switch at location U38 on the printed circuit board to configure the GPIB primary address and operating modes of the GPIB-BUF. The DIP switch has eight configuration switches. Figure 2-2 shows the factory default setti ...
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National Instruments GPIB-BUF - page 20
Chapter 2 Installation and Operation © National Instruments Corp. 2 -5 GPIB-BUF User Manual Table 2-2. Configuration Parameters for Switches 4 through 8 Switches 4567 8 Indication OF F OF F OF F OF F OFF Sets GPIB primary address 0 OF F OF F OF F OF F O N Sets GPIB primary address 1 OF F OF F OF F O N OFF Sets GPIB primary address 2 OF F OF F OF F ...
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National Instruments GPIB-BUF - page 21
Installation and Operation Chapter 2 GPIB-BUF User Manual 2 -6 © National Instruments Corp. Table 2-2. Configuration Parameters for Switches 4 through 8 (Continued) Switches 4567 8 Indication O N O FF O N OF F OFF Sets GPIB primary address 20 O N O FF O N OF F O N Sets GPIB primary address 21 O N O FF O N O N OFF Sets GPIB primary address 22 O N O ...
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National Instruments GPIB-BUF - page 22
Chapter 2 Installation and Operation © National Instruments Corp. 2 -7 GPIB-BUF User Manual Step 5. Power on the Unit Power on your target device then power on your GPIB-BUF by using the front panel rocker switch. The POWER LED should light immediately and the READY indicator should blink while the unit executes its power-on self-test. The READY i ...
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National Instruments GPIB-BUF - page 23
© National Instruments Corp. 3 -1 GPIB-BUF User Manual Chapter 3 Technical Information This chapter contains a more detailed description of the operation of the GPIB-BUF. The timing characteristics of the parallel port are provided in this chapter. The GPIB-BUF is actually a powerful 8-bit microcomputer tailored for use as an IEEE 488 data buffer. ...
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National Instruments GPIB-BUF - page 24
Technical Information Chapte r 3 GPIB-BUF User Manual 3 -2 © National Instruments Corp. If the SRQ-on-empty feature is enabled, the GPIB-BUF asserts the Service Request (SRQ*) signal on the GPIB IN port. The SRQ condition can be used to signal the GPIB Controller that the GPIB-BUF is powered on and ready to accept data. Addressing The five GPIB ad ...
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National Instruments GPIB-BUF - page 25
Chapter 3 Technical Information © National Instruments Corp. 3 -3 GPIB-BUF User Manual DMA Controller transfers the data directly to the internal data buffer without processor intervention. Thus, GPIB transfer rates as high as 900 kbytes/s are possible. The GPIB-BUF turns off the EMPTY indicator as soon as it starts receiving data from the host. T ...
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National Instruments GPIB-BUF - page 26
Technical Information Chapte r 3 GPIB-BUF User Manual 3 -4 © National Instruments Corp. When receiving data while addressed as a GPIB Listener, the GPIB-BUF buffers the state of the EOI* signal line along with the data byte it corresponds to using an additional on-board RAM module. Therefore, the GPIB-BUF is able to maintain the EOI status with ea ...
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National Instruments GPIB-BUF - page 27
Chapter 3 Technical Information © National Instruments Corp. 3 -5 GPIB-BUF User Manual Polling the GPIB-BUF The GPIB-BUF can return status information to the GPIB Controller through the serial poll response byte as shown in Figure 3-1. This byte contains two bits of information that reflect the current condition of the GPIB-BUF data buffer and whe ...
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National Instruments GPIB-BUF - page 28
Technical Information Chapte r 3 GPIB-BUF User Manual 3 -6 © National Instruments Corp. The GPIB-BUF SRQ-on-empty feature and serial poll status byte are useful for several reasons. • A remote Controller is able to tell when a data transfer to a plotter or printer is completely finished. • A ready indicator is provided to a remote GPIB Control ...
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National Instruments GPIB-BUF - page 29
Chapter 3 Technical Information © National Instruments Corp. 3 -7 GPIB-BUF User Manual Internally, the local Individual Status (ist) bit of the GPIB-BUF is reset to 0 when the internal data buffer is empty of data. It is set to 1 when the internal data buffer is not empty. Therefore, after the GPIB Controller configures the GPIB-BUF with a Paralle ...
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National Instruments GPIB-BUF - page 30
Technical Information Chapte r 3 GPIB-BUF User Manual 3 -8 © National Instruments Corp. Special Note About Timeouts If your current GPIB system relies on a timeout method to ensure a non- functioning GPIB device does not hang the bus indefinitely, then it may be necessary to adjust or disable the time limit to ensure that the target device has eno ...
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National Instruments GPIB-BUF - page 31
Chapter 3 Technical Information © National Instruments Corp. 3 -9 GPIB-BUF User Manual internal data buffer. This mode can be used to prematurely abort a lengthy plot or print. Neither Group Execute Trigger (GET), Go To Local (GTL), nor Local Lockout (LLO) have any effect on the GPIB-BUF. The GPIB IN port on the GPIB-BUF can only act as a GPIB Tal ...
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National Instruments GPIB-BUF - page 32
Chapter 1 Description of the GPIB-232CV © National Instruments Corp. 1 -1 GPIB-232CV User Manual Appendix A Hardware Specifications This appendix lists the electrical, environmental, and physical specifications of the GPIB-BUF. Table A-1. Electrical Characteristics Characteristic Specification Power Supply Unit Wall mount typ e, 115 VAC or 230 VAC ...
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National Instruments GPIB-BUF - page 33
Hardware Specifications Appendix A GPIB-BUF User Manual A -2 © National Instruments Corp. Table A-3. Physical Characteristics Characteristic Specification Case Size 1.6 in. by 5.7 in. by 8.4 in. (40.6 mm by 144.8 mm by 213.4 mm) Case Material All metal enclosure Rack Mounting Single or dual kits available Weight 28 oz. (796 gm) without power suppl ...
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National Instruments GPIB-BUF - page 34
© National Instruments Corp. B -1 GPIB-BUF User Manual Appendix B Customer Communication For your convenience, this appendix contains forms to help you gather the information necessary to help us solve technical problems you might have as well as a form you can use to comment on the product documentation. Filling out a copy of the Technical Suppor ...
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National Instruments GPIB-BUF - page 35
Technical Support Form Technical support is available at any time by fax. Include the information from your configuration form. Use additional pages if necessary. Name Company Address Fax ( ) Phone ( ) Computer brand Model Processor Operating system Speed MHz RAM MB Display adapter Mouse yes no Other adapters installed Hard disk capacity M B Brand ...
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National Instruments GPIB-BUF - page 36
The problem is List any error messages The following steps will reproduce the problem ...
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National Instruments GPIB-BUF - page 37
Hardware Configuration Form Record the settings and revisions of your hardware on the line to the right of each item. Update this form each time you revise your hardware configuration, and use this form as a reference for your current configuration. National Instruments Products • GPIB-BUF Revision • Switch Settings: Other Products • Computer ...
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National Instruments GPIB-BUF - page 38
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-BUF User Manual Edition Date: February 1994 Part Number: 320125-01 Please comment on the completeness, clarity, and organization of the manual. ...
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National Instruments GPIB-BUF - page 39
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: Techn ical Publications National Instruments Corporation MS 53-02 ( ...
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National Instruments GPIB-BUF - page 40
© National Instruments Corp. G- 1 GPIB-BUF User Manual Glossary Prefix Meaning Value µ - micro 10 -6 m- milli- 10 -3 k- kilo- 10 3 M- mega- 10 6 ° degrees % percent A amperes A C alternating current ANSI American National Standards Institute C Celsius EM I electromagnetic interference F C C Federal Comm unications Commission GPIB G e ne ra l P u ...
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