LPCI-3488A [ETC]
High-Performance IEEE-488 GPIB Interface for USB/PCI; 高性能IEEE-488 GPIB接口为USB / PCI
| 型号： | LPCI-3488A |
| 厂家： | 
ETC |
| 描述： | High-Performance IEEE-488 GPIB Interface for USB/PCI |
| 文件： | 总2页 (文件大小：390K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
USB/LPCI-3488A
High-Performance IEEE-488 GPIB Interface for USB/PCI
Introduction
The IEEE-488 standard, also known as GPIB, is a bus interface that connects instruments with a computer to
form an ATE system. GPIB was initially developed by Hewlett Packard and was recognized as an IEEE
standard in 1978. The IEEE-488.1-1978 standard defines the convention for electrical and mechanical bus
characteristics, as well as the state diagram for each bus function. In 1987, another standard was derived
from the original IEEE-488.1-1978 and known as IEEE-488.2-1978. It was introduced to define data formats,
common commands, and control protocols for instruments. In general, IEEE-488.1 defines hardware
specifications, and IEEE-488.2 defines software specifications. The IEEE-488 standard has been widely
accepted by instrument vendors over the past few decades. Today, GPIB is still the most popular interface
between computer and instruments.
USB-3488A
Instrument A
Able to Talk,
Listen and Control
ex: Computer
Instrument B
Able to Talk
and to Listen
ex: Oscilloscoae
Instrument C
Able to Listen
ex: Function
Generator
EOI
IFC
SRQ
ATN
REN
5system
Management
lines
DAV
3 handshake
lines
NRFD
NDAC
DI01-8
8 data lines
Features
Handshake and data signals on the GPIB bus
■ Fully compatible with the IEEE-488 standard
■ Supports a 32-bit 3.3 V or 5 V PCI bus
■ Up to 1.5 MB/s data transfer rates
■ Built-in FIFO for read/write operations
■ Provides APIs compatible with NI-488.2 driver software*
■ Supports industrial-standard VISA library
■ Interactive utility for testing and diagnostics
■ Easy GPIB connectively for laptop computer (USB-3488A)
■ Plug and Play interface; No GPIB cable required for
instrument connection (USB-3488A)
■ 2 M USB cable attached (USB-3488A)
■ USB 2.0 compatible (USB-3488A)
Linear instrument connection
Star instrument connection
■ No external power required (USB-3488A)
ADLINK's USB-3488A and LPCI-3488A controller interface cards are fully compatible with the
■ꢀOperating Systems
IEEE-488.2 instrumentation control and communication standard and are capable of controlling up to
14 stand-alone instruments via IEEE-488 cables. The USB-3488A and LPCI-3488A are designed to meet
the requirements for high performance and maximum programming portability. The USB-3488A and
LPCI-3488A is developed using ADLINK's intellectual property in FPGAs which incorporates a GPIB controller,
provides capability, and supports a transfer rate up to 1.5 MB/s. With APIs that are compatible with NI-488.2*
driver software and VISA support, the USB-3488A and LPCI-3488A offer the best compatibility with
your existing applications and instrument drivers
ꢀ
•ꢀ Supports Windows 7/Vista/2000/XP/Server 2003
■ꢀRecommended Software
ꢀ
ꢀ
ꢀ
•ꢀ VB/VC++/BCB
•ꢀ LabVIEW*
•ꢀ LabWindow/CVI*
ADLINK GPIB Data Xfer Rate (Small Block Data)
ADLINK GPIB Data Xfer Rate (Large Block Data)
1600
1400
1200
1000
800
1000
800
600
400
200
600
400
200
0
200
400
600
800
0
1000
15 30 45 60 75 90 105 120 135 150
Block Size (Bytes)
Block Size (KBytes)
Performance
ADLINK's expertise in PCI and PXI interface cards was leveraged when developing these newly designed
GPIB interface cards. The LPCI-3488A, which is the low-profile PCI form factor, supports both 3.3 V and 5V PCI
buses and can be adapted to most industrial and desktop computers. A built-in FIFO is placed between the
GPIB bus and PCI controller to buffer GPIB read/write operations. This FIFO eliminates the gap between the
slow GPIB bus (~1.5 MB/s) and the fast PCI bus (132 MB/s), the maximum GPIB transfer rates of LPCI-3488A
is 1.5 MB/s, and dramatically increases overall system performance.
5-1
www.adlinktech.com
GPIB Communications
Fully Compatible with Your Existing Applications
ADLINK GPIB interface cards are delivered with complete software support, including a driver API that is fully binary compatible with NI-488.2* driver software. All programs
written based on GPIB-32.DLL can be executed with USB-3488A and LPCI-3488A without any modification. VISA library is also supported to ensure compatibility with
applications utilizing VISA. The ADLINK USB-3488A and LPCI-3488A thus provides the “Plug and Play” compatibility with all your existing applications.
How do ADLINK's GPIB Interface Cards Work?
Microsoft VC++/VB
The objective of a test and measurement application is to test a specific UUT (Unit Under Test)
NI LabVIEW*
ADE
automatically. A typical automatic testing system includes testing programs and various testing
NI LabWindows/CVI*
Agilent VEEPro
equipment connected to the host computer via a GPIB interface. To manage the connections with
GPIB instruments, testing programs are usually developed according to the following model: ADEs
Direct invocation
to GPIB driver API
functions
Using existing
(Application Development Environments), the environment where applications are written. Some
ADEs are popular because users can implement any function needed using textual programming
(ex. VC++/VB, TestExec) or graphical programming (ex. LabVIEW™*) techniques. A vital part of
a test and measurement application is to control and communicate with GPIB instruments. Two
techniques are generally used to control the GPIB interface: invoke the native driver API or use
the existing instrument drivers via VISA. A native driver API is provided by most GPIB interface
vendors and is usually in the form of ANSI C functions. For users who need more detailed control
over GPIB instruments, using a driver API with SCPI string commands is a good choice. For others
who want to keep away from complicated instrument commands, instrument drivers developed
for specific ADEs (ex. LabVIEW™*/TestExec) can significantly simplify the complexity of instrument
control. Most of the instrument drivers use a VISA library to control the GPIB interface and
communicate with instruments. VISA support is essential in this case. ADLINK GPIB interface cards
instrument drivers
via VISA in ADE
VISA
Native driver API
to provide IEEE-
488 functions
Driver API
(GPIB-32.DLL)
ADLINK USB-3488A
ADLINK LPCI-3488A
Agilent 82350B
NI PCI-GPIB*
...
GPIB Cards
work with your applications in both ways. Its GPIB-32.DLL provides binary compatibility with the popular NI-488.2* driver software. The USB-3488A and LPCI-3488A also
provide VISA library support that can be used with most common instrument drivers written by instrument vendors. Regardless if you are using VC++, VB, Delphi, LabVIEW™*,
or any other T&M ADE, ADLINK GPIB interface cards are the most cost-effective GPIB solutions compatible with all your applications.
Specifications
Ordering Information
■ USB-3488A
High-Performance IEEE-488 GPIB interface
for USB
■
GPIB Bus Specifications
• Up to 14 instruments connected
• Maximum 1.5 MB/s data transfer rate
• Cable length
■ LPCI-3488A
High-Performance IEEE-488 GPIB interface
card for low-profile PCI bus, shipped with an
additional low-profile bracket.
-2 meters between each instrument (suggested)
-20 meters total cable length
• Data transfer mode: 8 bits parallel
• Handshake: 3 wire handshake, reception of each data byte is
acknowledged
■ ACL-IEEE488-1
IEEE-488 standard cable, 1 meter length
■ ACL-IEEE488-2
IEEE-488 standard cable, 2 meter length
■
Certifications
• EMC/EMI: CE, FCC Class A
■
Programming Interface
• VB/VC++/BCB
■ ACL-IEEE488-4
IEEE-488 standard cable, 4 meter length
• LabVIEW™*
• LabVIEW™/CVI*
■ ACL-IEEE488-8
■
External Indicators (USB-3488A)
• Ready: Green for active device
• Active blinking amber for transferring data
• I/O connector : IEEE-488 standard 24-pin
• Operating temperature : 0°C to 55°C
• Storage temperature : -20°C to 80°C
• Relative humidity : 5% to 95%, non-condensing
• Power requirements
IEEE-488 standard cable, 8 meter length
Product names mentioned herein are used for
identification purposes only and may be trademarks and/
or registered trademarks of their respective companies.
■
General Specifications
*NI, LabVIEW, and LabWindows CVI are trademarks
or registered trademarks of National Instruments
Corporation or its subsidiaries in the United States and
other countries.
• LPCI-3488A
• USB-3488A
+5 V
+5 V
250 mA (typical)
300 mA (maximum)
190 mA (typical)
500 mA (maximum)
ꢀ
ꢀ
ꢀ
■
■
■
Dimensions (not including connectors) :
I/O Connectors
• LPCI-3488A: 120 mm x 64 mm
• USB-3488A: 81.7 mm (L) x 66.1 mm (W) x 27.8 mm (H)
• GPIB: IEEE-488 standard 24 pin
• USB: USB standard series A plug (USB-3488A)
• All operations can be executed with the ADL-GPIB driver package
Driver Compatibility
5-2
Updated 03-28, 2012. ©2012 ADLINK Technology, Inc. All Rights Reserved. All specifications are subject to change without further notice.
www.adlinktech.com
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