Noise
a signal's fluctuation other than that desired.
See Also: Pink Noise, White Noise, RF Noise, Distortion, NVH
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Low-Noise DC Bias
Imaging devices, such as CCDs, IR FPAs, and CMOS image sensors, require DC bias with very low electrical noise to prevent contamination of the image. Image quality can also be enhanced by carefully tuning each bias voltage to extract the maximum signal/noise ratio out of an array. Pulse Instruments has decades of experience providing DC bias supplies with the flexibility required tocharacterize and test a variety of devices while maintaining the noise immunity required for satellite and astronomy applications.
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Ultra-Low Phase Noise Amplifiers
When phase noise is critical, turn to Mercury’s line of low phase noise amplifiers. Taking full advantage of the industry’s best device technology, these parts are designed to meet the toughest requirements. Through Mercury System’s advanced production capabilities, phase noise can be accurately measured—even during environmental tests, such as vibration.
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Dual Channel Noise Dosimeter
SV 102+
The SV102 + is our latest dual-channel noise dosimeter and replaces our ground breaking SV102. It has been designed for the accurate measurement of noise exposure to ISO 9612 and MIRE (microphone in real ear) measurements to ISO 11904-1.
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Low Noise Amplifiers
RPG Low Noise Amplifiers are developed and manufactured using the most modern discrete components and thin film technologies, in order to cover the frequency range 50 to 350 GHz. With improved DC-supply and modern semiconductors these amplifiers not only deliver low noise performance but also broad operating bandwidth and gain flatness. These low-noise amplifiers are available as a standard product and on request as customized manufactured product.
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Phase Noise Testers / Signal Source Analyzers
7000 Series
Berkeley Nucleonics Corporation
The 7000 series is an all-in-one integrated solution that offers an indispensable set of low-noise phase measurement functions. Offering both Absolute and Additive(residual) measurement capabilities in one unit at no additional cost, the 7000 series is the most flexible solution on the market. The instrument comprises a two-channel, cross-correlation system with two internal, tunable references sources that also allows measurements with externally sourced references. We offer three platform options for the 7000 Series Phase Noise Testers: the 7070 1 MHz to 7 GHz, the 7300 1 MHz to 26 GHz, 7340 1 MHz to 40 GHz, 7350 1 MHz to 50 GHz, and the 7360 1 MHz to 65 GHz.
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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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Online Noise Monitor
AWA5636-3
Hangzhou Aihua Instruments Co., Ltd.
Complies with IEC 61672 Class 2. Uuse in Noise On-line Monitoring, Connect to Noise Screen
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Dual, Low Noise, Coaxial Cable Optimized
DCOAX
Very high precision, three-terminal capacitance measurements can be affected by the self-inductance of the test cables, mainly at higher capacitance values. Magnetically induced noise can also reduce the quality of measurements. The cable now offered by Andeen-Hagerling both minimizes these problems and provides a way to standardize the residual self-inductance.
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Low Noise Amplifiers
Chengdu KeyLink Microwave Technology Co., Ltd.
KeyLink's low noise amplifiers typically exhibit noise figures below 5.5dB and output 1dB compression points up 8dBm. These amplifiers are economical choices for general purpose applications. KeyLink's low noise amplifiers can be categorized as follows.
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Low Acoustic Noise and Compact Range
m-series
DC powered cooling fan is built-into the shaker. Natural air cooling is also used when the cooling fan is stopped for silent operation. (with a reduction in performance)
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Low Noise Amplifiers
High-intercept and high-gain low noise amplifier modules. Wide supply voltage range. Custom designs available through LNA design services.
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Noise Source Family
346 Series
This series of broadband noise sources has been designed to cover the majority of measurement applications with a range of frequencies, Excess Noise Ratio (ENR) and coaxial connector types.
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Environmental Noise Monitors
Noise is one of the most complained about aspects of the environment, as not only does it have the potential to affect quality of life, it can also be difficult to monitor and therefore control. This type of noise is generally called environmental noise. There are many man-made sources of environmental noise, such as wind turbines, industrial sites, roads and traffic etc. If you are looking for equipment to measure noise in the workplace, look at sound level meters.
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Noise Dosimeters
Spark Family
Spark® series dosimeters are compact, affordable and tamper-proof personal Noise Dosimeter that measures the following to applicable IEC and ANSI standards:*Noise Exposure: Multiple Dose; Projected Dose; Time Weighted Average; (all with 4 user selectable combinations of Exchange Rate, Threshold, Criterion Level and Criterion Time); Sound Exposure Level*Sound Levels:; Leq; Lmax; Lmin; Lpeak/Luwpk, SEL and more*Time and number of events above Ceiling Level (115 dB) and Peak Level (140dB)
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IMPATT Noise Generator CW & Pulse At W-band, 94 GHz :
The device consists of two modules, a cable that connects them, and a power cable. The first module (I) contains the power supply (AC 115 V), regime switch mechanism and a generator of a series of pulses. The second module (II) is the noise generator. Photo 1: Module I - Power Supply
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Fullband Coaxial Noise Sources
Our line of full-band noise sources are specially designed for easy integration into microwave systems. They feature rugged construction with excellent long-term stability. In addition to the RF output choices, there are also different packages available to meet a wide range of mechanical constraints. Typical applications include jamming, radar alignment, SNR testing and general lab use.
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Noise Source, 10 MHz to 18 GHz, nominal ENR 15 dB
346B
The Keysight 346B noise source is the ideal companion to Keysight's noise figure solutions. Since it is broadband (10 MHz to 18 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. The 346B's high ENR, low SWR, and variety of connectors make it a general-purpose noise source. Add special option H01 for high ENR (21 dB typical) to measure high noise figure devices, or option H42 for measuring Direct Broadcast Satellite (DBS) low noise block converters.
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Noise Monitoring Kit
NMS044 SoundAdvisor
Larson Davis has created a new standard for portable noise monitoring systems by making the SoundAdvisor Kit Model NMS044 completely wireless with solar charging and 4G wireless while keeping it truly portable. The SoundAdvisor noise monitor includes everything needed for a noise monitor (powered by SoundAdvisor Model 831C Class 1 sound level meter) that can run indefinitely while remaining connected to the Internet making your meter and your data always readily available.
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10 MHz to 55 GHz Noise Sources
CNS346 Series
The Spanawave CNS346 Series is designed for precision noise figure measurement applications. The superior VSWR characteristics reduce multiple reflections of the test signals and significantly increase the measurement accuracy of most noise figure set-ups. The CNS346 Series noise sources have broadband coverage and extremely good temperature and voltage stability, for the finest noise figure meter-compatible laboratory standards. Outputs of 6, 15.5 and 22 dB ENR are available, allowing the units to accurately measure noise figures up to 20 ,30 and 36 dB respectively.
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Noise Source, 1 GHz up to 40 GHz
346CK40
The Keysight 346CK40 is the ideal companion to Keysight´s noise figure solutions when working on high frequency applications. Since it is broadband (1 GHz to 40 GHz), it eliminates the necessity for several sources at different frequency bands. The low SWR of the noise source greatly reduces measurement uncertainty, which are commonly reflections of the test signals. This is a coaxial noise source with a 2.4 mm coaxial connector. ENR typically 14 dB at 1 GHz, decreasing to 5 dB at 40 GHz (typical).
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Phase Noise Generator / Calibrator
PNG-A
Noise eXtended Technologies S.A.S.
The PNG-A is a high precision generator used in Test and Measurement instruments calibration. It is a Signal Generator with precisely computed phase and amplitude noise characteristics. With its wide frequency offset range, 1Hz to 1 MHz offset, and its programmable Phase and Amplitude noise in real time, this is the ideal standard to calibrate phase noise analyzers, Signal Source Analyzers and Spectrum Analyzers.
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Low Noise Amplifier
DLNA8-40-50-2582
Low Noise Amplifier, Frequency 40~50GHz, Gain 38dB, Noise figure 3dB, P-1dB 13dBm, 1.85mm-Female Removable
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Noise Figure And Gain Test Extenders
SA full noise figure and gain test extender that extends the noise and gain measurement capabilities of common and low frequency signal synthesizers and noise figure meters to the frequency range of 110 to 170 GHz. This extender is designed to interface with industry standard noise and gain test systems.
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Linear Power Supplies Bipolar 4-quadrant, Analog/Digital/Local Control, Ultra Low Ripple/Noise
BOP Series
Kepco's bipolar BOP power supplies are available in 100W, 200W and 400W sizes. For applications requiring higher power, see Kepco's 1KW High Power BOP. For applications requiring higher voltage, Kepco's Series BOP-HV are available in 500V and 1000V models.BOP are high speed power operational amplifiers that can be used to provide dynamically agile voltage for test and simulation. They are not general purpose power supplies. By the nature of the bipolar high speed design, they do not have any energy-storage noise discriminating output capacitors. These power supplies offer ultra low noise and ultra low ripple at the output and are MIL-STD-461 compliant.
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Phase Noise Measurement Solution, 50 kHz to 110 GHz
E5505A
The Keysight Technologies E5500 Series of phase noise measurement solutions offers the most flexible set of measurements on one-port VCOs, DROs, crystal oscillators and synthesizers. Two-port devices, including amplifiers and converters, plus CW, pulsed and spurious signals can also be measured. The E5500 measurements include absolute and residual phase noises, AM noise, and low-level spurious signals. The stand-alone instrument architecture easily configures for various measurement techniques, including the PLL/reference source technique, residual and FM discriminator methods.
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Forward Path NPRT 2200 Noise Power Ratio Test Set
NPRT 2200-F
The NPRT 2200 measures the NPR of a device across a range of power levels. This test quantifies intermodulation distortion and determines the dynamic range of optical transmitters, amplifiers and other active HFC network devices. The included PC software uses predefined test setups to run a "Power Sweep" series of NPR measurements and graph the results.
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dBAlert Personal Noise Warning Unit
GA907
dBAlert! activates only when the noise exceeds a pre-set level, warning exposed workers that noise levels have become dangerous and to put on their ear-defenders.
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Pulse Function Arbitrary Noise Generator
81150A
1 - 120 MHz pulse generation with variable rise/fall time1 - 240 MHz sine waveform output14-bit, 2 GSa/s arbitrary waveforms512k samples deep arbitrary waveform memory per channel Noise with a selectable crest factor and signal repetition time of 26 days FM, AM, PW, PWM, FSK modulation capabilities up to 10 MHz1 or 2 channel, coupled and uncoupled Differential outputs
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Dual Channel, Low-Noise DC Bias Card
PI-41701
The PI-41701 is a dual 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 features programmable current limits with LED indicators and software interrupt to show/alert the user if the channel is in current limit. This card has special filter circuitry to reduce the output noise for those applications that require a low noise bias output.
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Sound Level Meter - For Workplace And Environmental Noise
SONIK-SE
The SONIK-SE is a powerful sound level meter which is ideal for performing occupational and environmental noise assessments for a variety of applications.
