Noise
a signal's fluctuation other than that desired.
See Also: Pink Noise, White Noise, RF Noise, Distortion, NVH
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Measurement Analysis Equipment
Facility fault diagnosis measuring instrument with technology that accurately tracks the heating part and abnormal noise generating part during operation of machinery using thermal imaging camera and microphone
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Voltage Amplifiers
Switchable gain up to 100 dB (x 100,000)Bandwidth DC to 100 kHzDC-drift 0.6 µV/°CInput noise down to 0.4 nV/√HzSwitchable AC/DC-couplingLocal and remote controlInput impedance up to 1 TΩ
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Phase Noise Tester 5MHz to 40GHz
Model 7340
Berkeley Nucleonics Corporation
Broad Frequency Range in a single compact instrument from 5MHz to 40GHz. Measurement offsets from .01Hz to 100MHz. Absolute Phase Noise - High Drift mode (ability to measure modulations, high drifting or unstable DUTs, etc.). AM (Absolute Amplitude Noise) measurements. Pulsed Measurement Capabilities. Transient Mode: measure WB Frequency, NB Frequency, NB Phase, NB Power (WB/NB being Wide Band and Narrow Band). Dual channel low-noise integrated power supplies.
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Analog Summing Amplifier
SIM980
Stanford Research Systems, Inc.
The SIM980 Summing Amplifier has four input channels that can be added or subtracted from each other. The output noise is less than 60 nV/√Hz, and crosstalk between channels is less than -80 dB. With a bandwidth of 1 MHz, a slew rate of 40 V/ms, and input offsets that are trimmed to ±100 µV, the SIM980 is extremely useful in many analog applications.
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Site Vibration And Noise Testing
Response Dynamics Vibration Engineering, Inc.
Effective vibration isolation is critical to the performance of many systems. It is often much more challenging than expected because the structural dynamics of the supporting structure, and the isolated structure, also affect the isolation performance. Isolation resonances can often create other vibration problems and confound an engineering team. We have successfully designed vibration isolation into countless systems over the years using unique custom solutions as well as adapting standard components and applying them properly to the design.
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Noise Figure Analyzers & Noise Sources
Keysight Technologies provide a range of noise figure measurements solutions to meet your needs, from the NFA series noise figure analyzers to the noise figure measurement personalities for our spectrum analyzers. We also have a range of noise sources to complete the measurement solution.
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Power Probes
RkP-500 Series
The RkP-500 Series probes take advantage of synchronous detection (chopper/lock-in amplifier) technology to offer unparalleled background noise rejection, S/N ratio, and sensitivity. Total power, average power, and irradiance can be measured. The probes can be mounted directly onto the Rk-570C Optical Chopper to form an integrated measurement system, or the chopper can be operated remotely from the probe.
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Voltage References
Analog Devices offers the widest selection of high performance voltage references in the industry. Our products range from high accuracy, low noise for high end industrial applications to general-purpose, low power for handheld, battery-powered applications. ADI is the ultimate source for design engineers looking for the perfect voltage reference that is cost effective, reliable, and dependable.
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Mobile Sound Ranging Array
MSRA
In a peer to peer conflict, weapon location radars used for counter battery purposes will be extremely vulnerable.With aerial/satellite based surveillance available for the opponent, radars will be seen. With electronic warfare means being omnipresent, radars will be triangulated and jammed. There is an urgent need for 24/7 persistent surveillance with (preferably) passive sensors. With mobility being the key for survival on the battlefield, rapid re-deployable, or even truly mobile sensor capabilities are required. Therefore, the traditional sheer sound pressure based sound ranging capability becomes obsolete, as the triangular footprint of the sensor nodes is too large to be installed on a manned, or unmanned platform. With the trend towards longer ranges and “shoot and scoot” drills, the concept of capturing the muzzle blast noise becomes questionable, as the speed of sound is too slow to provide timely localizations.
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Ultra Low Noise, Rubidium Frequency Standard.
A10-M
Frequency Referencing, Calibration, Standards Lab, Production Test for Oscillator Manufacturers. A very high stability LOW NOISE 10MHz Rubidium Reference, primarily for production test of quartz oscillators and RF instrumentation frequency referencing. This industry standard 2U rack-mount instrument has a long heritage and ongoing production life for this latest 2009 version that features RS232 monitoring and control of the DPLL, locking the Ultra Low Noise OCXO to the Rubidium. Damping and Bandwidth is controlled by integrator digital gain, proportional digital gain, pre-filter order and subsample rate. Eight values of user selected bandwidth are available.
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Amplifiers
Teledyne Lincoln Microwave design and manufacture RF amplifiers utilising the latest semiconductor technology. Our portfolio includes low noise amplifiers (LNA’s), power amplifiers and pre-amplifiers. These can incorporate linearization, filtering, phase and amplitude control functionality.
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Sound Level Meter, 40 dB, 130 dB, 3.5 dB, 0.1 dB, 40 °C, 0 °C
72-935
The 72-935 is a Compact Digital Sound Level Meter, measures less than 6-inch length, including the windscreen and provides full 40 to 130dB measuring range. Perfect for numerous types of measurement including sound system testing and noise level monitoring.
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Femto / Picoammeter, 0.01fA, Battery
B2983B
The B2983B Femto/Picoammeter is the world’s only graphical picoammeter that allows you to confidently measure small currents with 0.01 fA (0.01 x 10-15 A) resolution. In addition, battery operation eliminates AC line noise from your critical measurements. It possesses a 4.3” color LCD with a graphical user interface that provides trend chart and histogram data in addition to numeric information. These front-panel capabilities enable you to capture transient behavior and to perform quick statistical analyses without a PC. The available Setup Integrity Checker software option allows you to compare the noise levels of different cabling and fixturing arrangements to help isolate external noise sources.
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Four Channel Low-Noise DC Bias Card
PI-41702
The PI-41702 is a four channel bipolar DC Bias supply that can provide an output current up to 100 mA per channel. The output voltage ranges from –8 V to +8 V, and this card has special filter circuitry to reduce the output noise for those applications that require a low noise bias output. Additionally there is a ‘D’ type connector that allows the introduction of laboratory type supplies to reduce the noise further. To change from using the internal power supplies to external power supplies requires repositioning jumpers. The PI-41702 also has voltage and current sense for remote measurement of the voltage and current levels.
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Amplifiers
Use our optical amplifiers to improve the signal-to-noise ratio (OSNR) and range performance of optical transmission systems.
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RF Frequency Divider, Multiplier, & Detector Modules
Analog Devices’ broad portfolio of frequency dividers, multipliers, and detector modules offers a number of high performance solutions, with features such as ultralow phase noise and improved frequency lock time to meet the demands of modern technology. Explore our product lines and discover how they can meet your industry, market, and design needs.
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High Density, Low Noise, Floating Low Voltage Power Supply System
PL500 Series
The WIENER PL500 is a high density, low noise, floating low voltage power supply system. The PL500-Series has been designed to power lowest noise electronics with medium to high currents (10A to 500A current/channel range) over long distances in voltage or current controlled mode. Operating in either un-sensed or sensed mode the dynamic behavior can be set internally or by software for short, medium or long distances.
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Transient Limiter
TBFL1
The TBFL1 is a combined transient limiter / attenuator / high pass filter, designed to provide optimum protection of spectrum analyzer or measurement receiver inputs when carrying out conducted noise measurements or other measurements where the input levels cannot be predicted with certainty or where accidental overloads may occur.
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Switch Mode Power Supplies-Water Cooled
The MSW Rectifiers are based on Switch Mode Technology. This reliable technology assures excellent quality DC currents with a ripple of < 3% and a control accuracy of less than 1%.The MS-Series features constant voltage and current control with easy, quick installation and maintenance. Modular versions easily increase the output by means of series or parallel connection. All models have DC short circuit protection. With forced air-cooled models, the cooling air quantity is controlled in relation to the load reducing contamination and noise levels.
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Wideband VCOs
Analog Devices wideband voltage controlled oscillators (VCOs) offer excellent output power and phase noise performance over temperature thanks to their monolithic construction. Our portfolio combines ultrasmall size, low phase noise, low power consumption, and a wide tuning range into one RoHS compliant SMT package.
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Signal Generator
8006
Normal switching mode, SSB phase noise will be degraded in the fast mode. 5 digit BCD, 1 latch control line, 25 pin female, D type connector
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PXI Sound and Vibration Module
PXI Sound and Vibration Modules are designed specifically for applications like audio test and measurement, noise and vibration diagnostics, machine condition monitoring, automotive test, noise, vibration, and harshness(NVH) analysis, and laboratory research. They provide software-configurable AC/DC coupling, antialiasing filters, and IEPE conditioning to ensure precision measurements with microphones, accelerometers, and other transducers with large dynamic ranges.
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Earth Leakage Breaker And Residual Current Device
IGR Series
IGR Leakage Current Analyzer is invented as the world first, and also can measure Insulation Resistance (MO) without power cut-off. This patented instrument can analyze leakage current, and display Igr(resistive), Igc(capacitive), and Io(vector sum), Ground Insulation Resistance, and the phase angle between voltage and current. (IGR ELB) - Operates due to Igr. - Properly-operating in spite of IGC in digital era. ( Not tripping on UPS load and Harmonics and noise area) - Possible to go down Igr for safety of people and animals. - Possible to manufacture high sensitive ELB. - Possible to prevent fire from electric leakage current.
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Low-Noise Filter, 210 V / 3 A
N1298C
The N1298 Series power source accessories are a collection of low noise filters for the Keysight B2960 Series precision source / measure units (SMUs).
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Noise Dosemeter
Castle GA257B
The SONUS Pocket Dosemeters are designed to be powerful and easy to use. These dosemeters are small and tough so measurements and data can be collected throughout the working period. Data can be reviewed on screen or downloaded to a PC for further analysis. The SONUS GA257B is a dedicated basic dosemeter fully compliant with IEC 61252:1993 and IEC 61672-1:2013, giving simultaneous sound exposure (Lep'd) and maximum peak (Zpeak) measurements, an essential feature for Noise at Work Regulations assessments.
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PXIe-5668, Up to 26.5 GHz PXI Vector Signal Analyzer
783156-03
Up to 26.5 GHz PXI Vector Signal Analyzer - The PXIe‑5668 offers wide bandwidth with high-performance measurement performance and speed. It meets the challenging requirements of applications such as wireless communications, radio frequency integrated circuit characterization, RADAR test, and spectrum monitoring and signal intelligence. With its implementation as a PXI instrument, the PXIe‑5668 also features the fast measurement speed required for high-volume manufacturing test, and multi-instrument synchronization capabilities for phase-coherent MIMO test. You can use the optionally included PXIe-5698 preamplifier to improve dynamic range and sensitivity near the instrument noise floor.
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Signal Injectors
Ideal high performance, low noise compliment to your Circuit Sleuth Frequency Response Analyzer. An injection transformer is used to couple an excitation signal from a frequency source into the feedback loop of a control system. This allows loop gain and phase vs. frequency to be measured, with the loop closed, thus characterizing the stability of the system.
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Linear Bench or Rack Mount Power Supplies Programmable, Local or Digital Control, Ultra Low Ripple/Noise
Series PCX-MAT
These voltage stabilizers with a full complement of meters and controls, are 1/6-rack size units designed to plug directly into their own carrier cases and rack adapters. Seven models are available. These power supplies offer ultra low noise and ultra low ripple at the output and are MIL-STD-461 compliant. A modular version of PCX-MAT called PCX is also available. Contact Kepco for details.
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Special / Customer Spec. Crates
6U VME 4500
The WIENER VME 4500 crate series is a compact new generation of 19" integrated packaging system with frontal cooling air intake for standard VME/VME64 bus systems with 6Ux160mm 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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Acoustics
When it comes to selecting a microphone for product tests—whether for sound power, sound quality, or noise source location—there's no need to compromise to sacrifice quality or performance for affordability.
