技术资料.pdf - 第6页

6 Modules Pr ovide Flexible Syst em Stimulu s and Control System con trol — w ith anal og outputs , ope n - collec tor digita l outp uts, clock generat ion, and isolated Form - C relays for contr olling ex ternal d evice…

Measurements You Can Trust

Get proven performance from Keysight instruments with the resolution, repeatability, speed, and accuracy

you’ve come to expect.

The 34980A offers built-in signal conditioning and modular flexibility. When you use it with the internal

DMM, you can configure each channel independently for the measurements you choose. It includes a

variety of features that give you confidence in your measurements:

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6½ digits of resolution with .004% of accuracy with DC voltage measurements

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Alarms per channel—high limit, low limit, or both

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Math functions—use Mx+B for custom linear conversions and converting raw inputs

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Built-in thermocouple reference for temperature measurements (34921T)

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Time-stamped readings

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Add more formulas with BenchVue DAQ

The integrated DMM is mounted inside the mainframe and does not consume any of the eight user-

available slots. You can access the DMM through any switch module that connects to the analog bus, or

directly from the analog bus connector on the rear of the mainframe. The internal DMM gives you the

flexibility to measure 11 types of inputs:

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Temperature with thermocouples, RTDs, or thermistors (with 34921A)

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DC and AC voltage

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2- and 4-wire resistance

•

Frequency and period

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DC and AC current

You can control the DMM directly or configure it to work in conjunction with the switches. Each switch

channel can be configured independently for measurement functions, scale factors, and alarm limits.

Advanced measurement features such as offset compensation, variable integration time, and delay are

also selectable on a per-channel basis.

The DMM inputs are shielded and optically isolated from the 34980A’s earth-referenced circuitry and

computer interface, and as a result, you get up to 300 V of input isolation. This is important for reducing

ground-loops and common-mode voltage errors associated with long wiring runs and floating sources.

Simple DMM calibration is accomplished with just the analog bus connection on the rear panel of the

mainframe. You don’t need to remove the mainframe from the rack or dedicate a channel for calibration.

Modules Provide Flexible System Stimulus

and Control

System control—with analog outputs, open-collector digital outputs, clock generation, and isolated Form-

C relays for controlling external devices. Additionally, with the microwave switch/attenuator driver, high-

frequency switches and attenuators can be efficiently controlled externally to the 34980A mainframe.

Analog sources—output either voltage or current. You can configure the 4-channel isolated D/A converter

as a point-to-point arbitrary waveform generator that lets you define up to 500,000 points per waveform.

Digital patterns—send or receive digital data from your device under test. With onboard memory, you can

output communication protocols and bitstreams or monitor digital input patterns and interrupt when a

user-defined pattern is detected.

Standard Interfaces Take the Hassle Out of

Connecting to Your PC

Standard Ethernet, USB, and GPIB interfaces are included in every mainframe. Use one of the built-in

interfaces that are already available in your computer, or if you prefer, GPIB is still available.

•

USB offers the quickest and easiest connection scheme—it’s perfect for small systems and bench

connections.

•

Ethernet offers high-speed connections that allow for remote access and control. Choose a local

area network to filter out unwanted LAN traffic and speed up the I/O throughput. Or take advantage

of the remote capabilities and distribute your tests worldwide. Use the graphical Web browser to

monitor, troubleshoot, or debug your application remotely.

•

GPIB has many years of proven reliability for instrument communication and can be used in existing

GPIB-based test systems.

Remote Access and Control

The built-in Web browser interface provides remote access and control of the instrument via a Java

applet-enabled browser such as Internet Explorer version 11. Using the Web interface, you can set up,

troubleshoot, and maintain your system remotely:

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View and modify instrument setup

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Open, close, or monitor switches

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Send SCPI commands

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Define and execute switch scans and switch sequences

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View error queue

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Get status reports on relay counts, firmware revisions, and more

Additionally, since the Web interface is built into the instrument, you can access it on any operating

system that supports the Web browser without having to install any special software. Password protection

and LAN lock-out are also provided to limit access. The Web interface makes it easy to set up,

troubleshoot, and maintain your system remotely.

Work with your choice of software so you can save time and preserve your software and hardware

investments. Program directly with SCPI, or use IVI or LabVIEW software drivers that provide

compatibility with the most popular development environments and tools:

•

Keysight VEE Pro

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National Instruments LabVIEW, LabWindows/CVI, TestStand, and Switch Executive

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Microsoft Visual Studio.NET, C/C++, and Visual Basic 6

BenchVue Data Acquisition Control and Analysis

The BenchVue software platform enables you to easily connect to and control the 34980A using the

BenchVue DAQ application. This application enables you to quickly configure channels, log data, and

visualize measurements for 11 of the 21 plug-in modules. Simply identify the measurements you want to

acquire, initiate the process and see the data displayed in real-time. The rich set of colorful graphics

provides many options for analyzing and displaying your data. You can specify multiple channels per

graph or send collected data to multiple graphs. You can use strip charts with markers and alarm

indications or histograms with statistics. And, of course, you can use BenchVue to easily move data to

other applications for further analysis or for inclusion in your presentations and reports.

Figure 1. BenchVue DAQ