Noise
a signal's fluctuation other than that desired.
See Also: Pink Noise, White Noise, RF Noise, Distortion, NVH
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Data Acquisition Systems
LMS SCADAS
Siemens Digital Industries Software
The LMS SCADAS state-of-the-art data acquisition systems cover all types of noise, vibration, durability testing and engineering tasks in the lab, in the field, with a PC or through autonomous recording. Seamless integration with LMS Test.Lab and LMS Test.Xpress provides you with reliable results and optimal testing productivity. Take your mind off the deadline and focus on the test. From lab to mobile to portable.
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Noise & Vibration Analyzers
The NVA instrument is generally composed of a personal computer equipped with one or more data acquisition board, a conditioning interface and / or to the transmitters power and finally a series of libraries of application software dedicated to the type of measurement to be made. the type of personal computer can be either a desktop, notebook or portable and depending on the particular requirements, you can use the PXI architectures.
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Tapping Machine
BAS004
The BAS004* is used to simulate foot fall noise in a manner that is well controlled and reproducible so that measured results can be replicated and compared with other measurements.
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Underground Pipeline Leak Detector
The devices are tuned to detect sounds or vibrations induced by water leaking from pressurized pipes and these spots are then marked to ‘ listen’ and pinpoint the leak using listening devices or leak noise correlators.
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VHF Band 1.0 Watt Amplifier With RF Bypass
Teledyne RF & Microwave has developed a 35 to 350 MHz custom amplifier with 1 watt output power. The amplifier has 29 dB gain with 3 dB noise figure. The amplifier assembly has a RF switch so that the RF input can be connected directly to the output bypassing the amplifier. The amplifier goes into the "bypass" state when the DC bias is removed from the switch. This unit is one of a series of amplifiers that covers the 1 MHz to 2100 MHz with similar operation.
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Accelerometers
Analog Devices accelerometers and iSensor® MEMS accelerometer subsystems provide accurate detection while measuring acceleration, tilt, shock, and vibration in performance driven application. Our portfolio leads the industry in power, noise, bandwidth, and temperature specifications, and offers a range of MEMS sensor and signal conditioning integration on chip. Our MEMS-based Circuits from the Lab® reference designs have been built and tested by ADI experts to help you jumpstart your next system design.
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Meter Software Module
Metra Mess- und Frequenztechnik in Radebeul e.K.
*Level display as five digits number*Display selectable between acceleration, velocity and displacement*RMS, positive, negative and unsigned peak values, instantaneous value *Rotary speed measurement with Photoelectric Reflex Switch (only VM-METER+)*Main frequency (only VM-METER+)*Measurement at rotation speed or multiples (only VM-METER+)*Sound level meter (A and C weighted) and noise dose meter (only VM-METER+)*THD (distortion) measurement (only VM-METER+)*One VM-METER license can be operated simultaneously up to four times with different settings*Offline measurement
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SNS Series Noise Source 10 MHz to 18 GHz (ENR 6 dB)
N4000A
The SNS series N4000A noise source is designed for accurately measuring devices with low noise figure, with a frequency range of 10 MHz to 18 GHz and nominal ENR 6 dB.
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Hydrophone
TC4047
The TC4047 miniature hydrophone offers a useable frequency range from 1kHz to 170kHz. The hydrophone incorporates a high quality 20dB low-noise pre-amplifi er which provides optimal conditions for signal transmission. The high sensitivity provides excellent signal to noise ratio and immunity against induced cable noise. The hydrophone is omnidirectional up-to 100kHz and has uniform receiving characteristic from 1kHz to 100kHz. An insert calibration circuit enables remote testing of the hydrophone condition. The hydrophone comes with a SEACON connector. The sensor element is permanently encapsulated in Special formulated NBR to ensure long term reliability. The rubber has been specially compounded to ensure acoustic impedance close to that of water. The strainrelief and outer jacket of the cable is made of high density polyurethane. TC4047 can be used in sea or fresh water.
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Broadband Planar Tunnel Diode Detectors
KRYTAR Broadband Planar Tunnel Diode Detectors are specifically designed for use in today's high-performance microwave instrumentation and systems. KRYTAR detectors are designed for such applications as power measurements, analyzing radar performance, leveling pulsed signal sources, AM noise measurements, system monitoring and pulsed RF measurements in ultra-broadband and mm-Wave applications.
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Fourier Transform Optical Spectrum Analyzer, 350 - 1100 nm
OSA201C
Thorlabs' Optical Spectrum Analyzers (OSAs) perform highly accurate spectral measurements. Compatible with fiber-coupled and free-space light sources, these compact benchtop instruments suit a wide variety of applications, such as analyzing the spectrum of a telecom signal, resolving the Fabry-Perot modes of a gain chip, and identifying gas absorption lines. Many commonly available OSAs use grating-based monochromators, which have slow acquisition times due to the need to mechanically scan the grating and average out noise at each wavelength. Thorlabs' OSAs acquire the spectrum via a Fourier transform using a scanning Michelson interferometer in a push/pull configuration. This approach dramatically improves the acquisition time, enables a high-precision wavelength meter mode with 7 significant figures and ±1 part-per-million accuracy, and allows the included software to provide robust statistical analysis of the acquired spectra, as explained in the Design tab.
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Copper Telecommunications Test
Noise and transmission problems are constant battles in the best of worlds. With emerging technologies like IP-video over DSL delivered to the customer over existing copper pairs, it's more vital than ever for telephone companies to test and maintain their outside copper plants.
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PXI/PXIe RF Switch, Triple SPDT, 3GHz, 50Ω, SMB
40-870A-003
The 40-870A-003 (PXI) and 42-870A-003 (PXIe) are 50Ω RF switches with 3 separate SPDT relays in a single slot. They have low insertion loss and VSWR through the use of modern RF relay technology at an affordable cost. The switch banks been carefully designed to ensure excellent and repeatable RF characteristics to frequencies of 3GHz. The injection of noise and unwanted signals into the signal paths of the 40/42-870A has been minimized by careful attention to the mechanical and electrical design.
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Time-Frequency Analysis, Time-Series Analysis and Wavelets
LabVIEW Advanced Signal Processing Toolkit
Includes the LabVIEW Digital Filter Design Toolkit (also available separately)Time-series analysis -- statistical analysis for description, explanation, prediction, and controlTime-frequency analysis -- analytical, graphical tools for signals with evolving frequency contentWavelet and filter-bank design for short-duration signal characterization, noise reduction, and detrendingIncluded in all NI Software Suites
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HES Spectrometers
ISI’s standard HES spectrometer offers a 100-fold increase in throughput over conventional systems currently available. This increased throughput can lead to a superior signal-to-noise ratio (SNR) for a given observation over a Czerny Turner instrument. The HES spectrometer contains no moving parts and yet offers the advantages of a Michelson Interferometer with the spectral properties of a traditional diffraction grating-based device, such as a Czerny Turner spectrometer.
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Brake Test Systems
GIANT 9000 Series
The major test target is to detect noise and vibrations generated by the vehicles brake. Our intention was to build a dynamometer that can operate either with brakes mounted to the complete vehicle, or with just the axle module mounted to a universal adaptor system or wheel suspensions.
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Low-Mid Frequency Analyzer
LMFA-21
Amfax introduce the latest PXI based High Performance Low and Mid Frequency Analysis System operating from 100Hz TO 2MHz with an extremely low noise floor. This high accuracy measurement instrument utilizes the National Instruments Function Generator and Flex Digitizer to optimize your frequency related product performance. Using the industry standard PXI platform enables us to offer the system a fraction of the cost of other typical two box solutions.
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Triple Output DC Power Supply, 60V/3A (2x) & 5V/3A; 375W
U8032A
Keysight now extends its range of basic DC power supplies to offer 375watt power range, making it an ideal power source alternative in electronics manufacturing, research and development as well as the education sector. The U8032A, basic DC power supply, is a manual triple-output power supply with sequencing capability. With this function, users can generate output sequences with minimal programming skills. Each power supply is also built with excellent load regulation and clean output noise for continued stability. With these and many other features, you get a solid and reliable triple-output power supply at an unsurpassed performance.
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Precision Condenser Microphone
2575
Performance:Nominal Microphone Diameter1"1" Frequency Response: Characteristic (at 0 incidence) Random IncidenceRandom Incidence Open Circuit Sensitivity: 45 mV/Pa Resonant Frequency (90 Phase Shift)8000 Hz8000 Hz[1] Inherent Noise<10 dB(A) re 20 Pa<10 dBTemperature Range (Operating)TBD FTBD C Humidity Coefficient of Sensitivity (0 to 95%, non-condensing)0.001 dB/%RH
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Powered VME64x Crates
9U VME64x 6021
WIENER VME 6021 crate series is the newest generation of 19" integrated packaging system for VME/VME64x bus systems with 9Ux400mm cards. Designed primarily for applications in data acquisition, control and test instrumentation it combines superior mechanical quality with lowest noise power supply technology.
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TMR Current Sensors
MultiDimension Technology Co.,Ltd.
An open-close current transducer, high sensitivity and signal-to-noise ratio TMR chips are used in the design, which based on Tunneling magneto resistance effect. The transducer has a built-in temperature compensation and nonlinear compensation circuit, which can accurately measure DC, AC and pulse current. The transducer has many benefits ,such as high precision, wide bandwidth, low power consumption, excellent isolation performance and so on. Besides, the design of open-close structure makes it easier to install and unload.
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Noise Source, 10 MHz to 26.5 GHz, nominal ENR 15 dB
346C
The Keysight 346C noise source is the ideal companion to Keysight's noise figure solutions. Since it is broadband (10 MHz to 26.5 GHz), it eliminates the necessity for several sources at different frequency bands. The low SWR of the noise source reduces a major source of measurement uncertainty; reflections of test signals. Option K01 is a coaxial noise source and features coverage from 1 to 50 GHz with a 2.4 mm coaxial connector.
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PXIe-4480, 1.25 MS/s, 3.4 Hz AC/DC-Coupled, 6-Input PXI Sound and Vibration Module
784277-01
1.25 MS/s, 3.4 Hz AC/DC-Coupled, 6-Input PXI Sound and Vibration Module—The PXIe‑4480 is designed for high-bandwidth audio, acoustic, and vibration measurements. It provides six channels of dynamic signal acquisition, and you can use one of four gain settings to configure your input range. The PXIe‑4480 also includes software-configurable AC/DC coupling, charge measurement, voltage excitation, IEPE excitation, and TEDS support, making it ideal for measuring acoustic transducers, pressure sensors, and hydrophones. Common applications include audio test; noise, vibration, and harshness (NVH) analysis; and underwater acoustic measurements. For measuring sudden changes, such as high speed blast and pressure events, the PXIe-4480 can sample up to 20 MS/s per channel in time-domain mode.
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Precision DC Power Module, 20V, 50A, 500W
N6765A
The Keysight N6765A is a 500 W precision DC power module that provides low noise, and precise control and measurements in the milliampere and microampere region with the ability to simultaneously digitize voltage and current, and capture those measurements in an oscilloscope-like data buffer. This module is used in both the small, multiple output 1U high N6700 Low-Profile Modular Power System (for ATE systems) and the multiple output N6705 DC Power Analyzer (for bench testing). GPIB, LAN, USB and LXI compliance are standard. Select from more than 30 different DC power modules ranging in capability from basic to high precision, and in power from 20-500 Watts.
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Noise Measurement Kits
Our noise measurement kits contain all the accessories you need to take accurate noise measurement instruments correctly.
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NI-9213, cDAQ-9171, and cRIO-9940 USB Temperature Measurement Bundle
865682-01
NI-9213, cDAQ-9171, and cRIO-9940 USB Temperature Measurement Bundle - The USB Temperature Measurement Bundle with NI-9213, cDAQ-9171, and cRIO-9940 includes the NI-9213 C Series Temperature Input Module and the cDAQ-9171 CompactDAQ Chassis for voltage measurements. This bundle also includes the cRIO-9940 Backshell for strain relief and operator protection from high-voltage signals. The included NI-9213 provides noise immunity, a high common-mode voltage range, NIST-traceable calibration, differential analog inputs, and four channels. Additionally, the NI-9213 features anti-aliasing filters, open-thermocouple detection, and cold-junction compensation for high-accuracy thermocouple measurements.
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AC/DC Linear Power Supply
Linear AC-DC power supplies are electronic devices used to convert electrical energy from alternating current (AC) to direct current (DC), providing a stable and regulated power supply for electronic devices. They are represented by the DA series.Linear power supplies of the DA series are characterised by their low output noise and high speed. They can be used as power amplifiers; a sinusoidal voltage of 8/10 Vpp can be superimposed on the test voltage up to a frequency of 50 kHz.Another application for this power supply family is the simulation of the curve of a photovoltaic panel by programming the voltage and current.
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Sound Level Meter
AWA5636-0
Hangzhou Aihua Instruments Co., Ltd.
Complies with IEC 61672 Class 2 use in Industrial Noise Surveys ; machinery, vehicles, ships and etc
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Noise Dosemeters
Noise Dosemeters are a type of sound meter designed to measure the levels of noise exposure to an individual over a period of time. All of our dosemeters are compliant to IEC 61252: 1993 / BS EN 61262:1997 and offer high quality and reliable personal noise monitoring solutions.
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Flex Power In-Line Auto Shut-Off Pulse Tools
Auto shut-off in-line pulse tool that automatically shuts off the air supply when the pre-set torque is reached. These rugged assembly tools increase productivity and enhance product quality through precision torque control and user comfort. The FlexPower Pulse Tools provide operators with an industry leading power-to-weight ratio, allowing for a smaller tool selection for greater torques giving operators a lighter tool with more torque capability. Ergonomically safer than harmful hammering and vibration of impact wrenches. Built for durability with a superior O-ring design and specially designed pulse fluid FlexPower extends life between regular oil changes and provides more torque stability. Offers comfortable rubberized non-slip grips for easy handling and excellent thermal ergonomics. Low noise decibels, minimal vibration and low torque reaction. It is important to understand your joint application before a selecting a pulse tool.
