USB-5680 NI [National Instruments Corporation], USB-5680 Datasheet

USB-5680

Manufacturer Part Number

USB-5680

Description

True RMS power measurements/Diode power meter

Manufacturer

NI [National Instruments Corporation]

Datasheet

1.USB-5680.pdf (4 pages)

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6 GHz True RMS Power Meter

with Bus-Powered USB Connectivity

NI USB-5680

• True RMS power measurements

• Diode power meter

• -40 to +23 dBm power range

• 50 MHz to 6 GHz frequency range

• 10 and 100 Hz typical

• ±0.13 dB accuracy at <+18 dBm

• ±0.18 dB accuracy at ≥+18 dBm

• Internal zeroing capability

• <3 percent sensor linearity

• Standing wave ratio <1.2 to 6 GHz

• 100 mA typical power consumption

• USB bus connectivity

• N-type connector

and search for USB-5680 Specifications.

Overview

The National Instruments USB-5680 is a 6 GHz true RMS (root-mean-

square) power meter that features high measurement accuracy and wide

dynamic range. As a true RMS power meter, the NI USB-5680 is ideal

for measuring the power of continuous wave (CW) signals. In addition,

it offers better than ±0.18 dB of linearity across all frequency ranges and

all power levels. This functionality, combined with a flexible API, makes

it ideal for measuring path loss in automated test applications. In

addition, its small size (less than 9.6 cubic in.) frees up valuable rack

space without sacrificing performance. One of the biggest benefits of the

USB-5680 is its USB connectivity. Powered solely from the USB cable, it

consumes only 100 mA of current. Thus, you can use this power meter in

both production test and field applications with a laptop. Moreover, USB

connectivity helps you easily integrate the power meter with PC and PXI

systems in an automated test environment.

Figure 1. Block Diagram of the NI USB-5680

For complete specifications, visit

channel bandwidth

Input

DC Block

NEW!

Attenuator

10 dB

ni.com/manuals

Attenuator

Splitter

27 dB

Operating System

• Windows Vista/XP/2000

Recommended Software

• LabVIEW

• LabWindows

Driver Software (included)

• NI-568x

Calibration

• Gain and offset self-calibration

• 1-year external calibration cycle

6 dB

(-5 to +23 dBm)

(-40 to -5 dBm)

Detector B

Detector A

™

/CVI

Averaging

Pre-Amp

Architecture

The USB-5680 RF power meter features a dual-path architecture to

achieve 63 dB of dynamic range. This architecture improves power

measurement accuracy by ensuring that the diode sensors are used in

their most linear region. A block diagram of the USB-5680 architecture

is shown in Figure 1.

and the second is from -40 to -5 dBm. This accounts for a combined

dynamic range of -40 to +23 dBm with a single power head.

As Figure 1 shows, the first measurement range is from -5 to +23 dBm

ADC

Microprocessor

USB

Related parts for USB-5680

USB-5680 Summary of contents

Page 1

... The National Instruments USB-5680 GHz true RMS (root-mean- square) power meter that features high measurement accuracy and wide dynamic range true RMS power meter, the NI USB-5680 is ideal for measuring the power of continuous wave (CW) signals. In addition, it offers better than ±0. linearity across all frequency ranges and all power levels ...

Page 2

... GHz True RMS Power Meter with Bus-Powered USB Connectivity Flexible Software You can operate the USB-5680 as a benchtop instrument automated measurement device. For benchtop use, the soft front panel (see Figure 2) helps you configure multiple instrument settings on the fly. This program runs in Windows Vista, Windows XP, and Windows 2000 operating systems ...

Page 3

... Because noise can have a significant effect on the accuracy of RMS power measurements, settings such as aperture time and averaging are often employed to mitigate the effects of noise on measurement accuracy. To improve flexibility, the USB-5680 features two aperture time settings to offer both high-speed and high-accuracy options. In “Low-Aperture” mode, the power meter features 15 measurements per second and in “ ...

Page 4

NI Services and Support NI has the services and support to meet your needs around the globe and through the application life cycle – from planning and development through deployment SERVICE NEEDS and ongoing maintenance. We offer services and service ...

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