Noise
a signal's fluctuation other than that desired.
See Also: Pink Noise, White Noise, RF Noise, Distortion, NVH
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Ancillaries - Radiated
EMC emissions can be at very low signal levels and pre-amplifiers can help to improve S/N ratio. The low level of emission signals can make them difficult to identify in noisy environments. RF filters are designed to attenuate the major sources of noise, thus making the task of measurement easier.
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Active Filter
J2190A
The J2190A active filter presents a high impedance (approximately 150kOhms) minimizing the loading of the circuit being tested. The output impedance is 50 Ohms allowing low noise coaxial connections to all typical test equipment. The 0.1Hz-10Hz noise band is common for opamp measurements, voltage regulators and voltage references. Many application notes offer schematics of such a filter for test purposes. An engineer’s time is much too valuable to be spent building test equipment. We have created a 4th order high pass and 4th order low pass filter with an optimally flat response and 0dB gain. Additional filters can be cascaded for even sharper cutoff.
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PXIe-5654, 250 kHz to 20 GHz, PXI RF Analog Signal Generator
783127-01
PXIe, 250 kHz to 20 GHz, PXI RF Analog Signal Generator - The PXIe-5654 features a combination of exceptional phase noise and frequency tuning time. These features address applications such as blocker test/receiver desensitization, high-performance intermodulation distortion measurements, and various electronic warfare applications. The PXIe-5654 is designed to meet the challenging requirements of RFIC characterization, satellite test, and radar applications. Some PXIe-5654 options include a PXIe-5696 Amplitude Extender Module. The PXIe-5696 supports a frequency range of 250 kHz to 20 GHz and an extended amplitude range up to 27 dBm.
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40-72 GHz Doubler
1GC1-8048
The 1GC1-8048 is a balanced diode frequency doubler consisting of two Schottky diodes and a coplanar balun structure. The doubler provides 15 dB conversion loss and 17.5 dBc 1st and 3rd order feed-thru for input frequencies between 20 and 33.5 GHz. This IC is fabricated in HFTC's InGaP/GaAs heterojunction bipolar transistor (HBT) process that provides excellent uniformity, reliability and 1/f noise performance.
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Low Phase Noise Amplifiers
Pasternack's low phase noise amplifiers cover select frequency bands ranging from 1.5 to 18 GHz with residual phase noise levels as low as -180 dBc/Hz @ 10 KHz offset. Additional performance specs include small signal gain ranging from 9 to 14 dB, with typical noise figure of 5.5 dB. Psat levels for these amplifiers range from +16 to +25 dBm with Output IP3 levels as high as +34 dBm. All models feature single DC voltage supplies and input/output RF ports are internally matched for 50 ohms with DC blocking capacitors. These compact module assemblies require no external components and are available in rugged Kovar metal drop-in packages that are gold-over-nickel-plated and support field replaceable SMA connectors. All models are EAR99 and guaranteed to meet MIL-STD-883 test conditions for hermeticity and temperature cycle.
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HF Low Noise Amplifier
The COMM-connect HF Low Noise Amplifier can be used to amplify signals in the HF frequency range. The amplifier comes with a selection of 4 different connectors, which makes it very easy to adapt to any type of installation. Mechanical mounting is made easy by mounting flaps protruding the casing.
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Security/Detection
2M
A thin film-based single element thermopile detector that offers the world's highest sensitivity in a TO-5 package. Dare to compare. Low noise voltage of 12.8nV/Hz.
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60W Dual Output Power Supply, Two 8V, 3A or 20V, 1.5A
E3646A
Keysight basic DC power supplies offer essential features for a tight budget. The single & dual output, 30-100 W GPIB E3640 series provide small, compact size for bench and system use; low output ripple and noise; and built-in measurements and basic programmable features with GPIB and RS232 interface. The Keysight 54W, multiple output E3646A is a clean, reliable power supply for general purpose applications, and combine convenient benchtop capabilities with flexible system features in a compact, multi-output package.
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PXI/PXIe RF Multiplexer, Single 16-Channel, 3GHz, 75Ω, MCX
40-835A-101
The 40-835A-101 (PXI) and 42-835A-101 (PXIe) are single 75 Ohm 16-channel RF multiplexers in a single slot. It has been designed to exhibit low insertion loss and VSWR through the use of modern RF relay technology at an affordable cost. The MUX has been carefully designed to ensure excellent and repeatable RF characteristics to frequencies of 3GHz. The design of the 40/42-835A minimizes the injection of noise and unwanted signals into the signal path by careful attention to the mechanical and electrical design.
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Frequency Multipliers
Analog Devices active and passive frequency multipliers enable designers to economically multiply lower frequencies to higher frequencies without creating measurable additive phase noise. This broad portfolio features a range of devices that can meet the size, volume, and cost needs for multiple applications, including:
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Sound Testing
SP series
Are ideal for on-site measurements in accordance with the noise at work legislation for industrial and office environments.
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Real-Time Spectrum Analyzers (RTSA)
Gain more confidence in your system or signal environment knowing you can capture intermittent or transient signals as short as 3.57 µsMaximize your investment when you add real-time capabilities to a UXA, PXA or MXA X-Series analyzer -no need for a dedicated instrumentGo deeper and thoroughly analyze complex signals with the 89600 VSA softwareAccelerate communication system development by quickly switching to must-have traditional measurements like phase noise, noise figure, and more
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Lock-In Voltage Preamplifier
SR552
Stanford Research Systems, Inc.
The SR552 Voltage Preamplifier is designed to work with SRS lock-in amplifiers, providing gain where it is needed most?right at the experiment. The preamplifier minimizes noise and pickup in the connecting lines and can reduce measurement time in noise-limited experiments.
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Seismometers
3T-120 Pothole
120 s to 50 Hz frequency response (option to 100 Hz), 1500 V/ms-1 (2 x 750 V/ms-1) sensitivity, Covers the complete seismic spectrum with a single transfer function, Measured Self noise below the USGS NLNM from 166 s (0.006 Hz), remaining below the high frequency limit of the NLNM at 10 Hz, High linearity: >111 dB (USGS figures), Dynamic range of 167 dB at 1 Hz (Full octave width across 1 Hz), Cross axis rejection over 65 dB; sensor axes orthogonal to within ±0.05°, Remote, automatic electronic mass locking, unlocking and centring, Operating tilt range of ±5° with adjustable feet for off-horizontal installation bases, Low power consumption: 0.75 W from a 10–36 V supply, Stainless steel enclosure, 100 bar / 10 MPa waterproof connector, IP68 - protection against effects of permanent immersion under pressure to 350 m depth
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Hi-Q Laser RIN Analyzer
OE4001
The OEwaves’ HI-Q® OE4001 Optical Test Measurement System (TMS) offers a fully automated measurement of ultra-low RIN (Relative Intensity Noise) CW laser sources.
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Rack-Mounted Timing Systems
CommSync II Family
The CommSync II family of modular systems provide GPS time and frequency outputs to meet your synchronization requirements. All systems include support for multiple input and output modules including 1PPS, IRIG, HAVE QUICK, PTTI, IEEE-1588 PTPv2, low phase noise 1, 5, and 10 MHz sine wave as well as custom outputs.These systems are available with military SAASM MPE-S GB-GRAM, SAASM Force 22E MRU or civilian C/A GPS receivers. Rubidium or OCXO oscillators provide for excellent holdover performance in the event of failure of the reference inputs. In addition, they may be configured as Distribution Time and Frequency (DTF) systems that are synchronized by an external reference. Dual Redundant systems (CommSync II & CommSync II-D) may be configured with two GPS Time & Frequency (GTF) modules and two power supply modules (AC and/or DC power) for redundancy with uninterrupted automatic switchover.
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Programmable DC Power Supply (2KW/3.2KW/6.5KW)
FTP Series
Shenzhen FaithTech Technology Co., Ltd.
FTP series wide range Benchtop computer-controlled DC regulated power supply is a high performance DC power supply developed by Faith Technology. It has the advantages of wide range output, large current, low ripple noise, fast transient response, high resolution, high precision, voltage and current slope can be set, etc.
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SMD Tweezer
U1782B
The Keysight U1782B is a tweezer to be used with the U1700 Series handheld capacitor and handheld LCR meters. For better noise immunity, the tweezer has a guard end to be connected to the meter´s guard terminal. The tweezer is now redesigned with a new shielded rigid cable to improve both usability and measurement stability.
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C-Band Separate Raman Fiber Amplifier
RFA5000
Hangzhou Huatai Optic Tech. Co., Ltd.
1. Erbium-doped Fiber Amplifier, due to the multiple cascades and the accumulation of noise caused by spontaneous emission, will reduce the system CNR greatly and thus it will limit the transmission capacity and distance of the system. Raman Fiber Amplifier (RFA) is a newly designed fiber amplifier based on Stimulated Raman Scattering (SRS) effect. It is considered as the core technology of new generation DWDM fiber over-long communication. Compared with Erbium-Doped Fiber Amplifier, Raman amplifier has the advantage of low Noise Figure (NF), wider gain bandwidth, flexible gain spectral region and stable temperature. It is the only device that can operate in 1300~1600 nm.
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DCDC
FC Series
The FC Series are ultra-low noise, high performance DC/DC converters that are packaged in low profile (0.4 inch high) cases. Essential quality performance features are designed and built-in. A high performance Pi input filter minimizes input reflected ripple, while 5-sided electrostatic shielding and tape-wound toroids, rather than pot cores, minimizeradiated EMI. Advanced circuit design techniques reduce conducted output noise in the form of current spikes, to an extremely low level.
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Partial Discharge Tester (Dry Type)
Partial Discharge testing is a way of detecting voids or imperfections in insulators that would lead to overheating and breakdown under normal operating conditions. Due to the nature of the signal being measured, this test is very susceptible to electronic and RF noise and a proper corona-free properly isolated test chamber is required.
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Photonics
Precision fiberoptic and free-space interfaces provide high-speed, low-jitter and low noise signal conversion, and transport of analog and digital signals.
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Infiniium V-Series Oscilloscope: 16 GHz, 4 Analog Channels
DSAV164A
16 GHz analog bandwidth (upgradable)4 analog channels Capture a longer signal trace with up to 80 GSa/s sample rate and 2 Gpts of acquisition memory Get the best signal integrity with the low noise floor (1.32 mVrms at 50 mV/div) and lowest jitter measurement floor (100 fs)See better measurement accuracy with ENOB values in excess of 5.5 and a SFDR exceeding 50 dBC Improve your testing with the broadest range of jitter, trigger, analysis and protocol tools (featuring Precision Probe)
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Linear Rack Mount Power Supplies Current Stabilizers, Programmable, Local/Digital/Analog Control, Ultra Low Ripple/Noise
Series CC
These current stabilizers with built-in, dual range current-sensing resistors and 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. These power supplies offer ultra low noise and ultra low ripple at the output and are MIL-STD-461 compliant.
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Noise Testing Software
GN-1100 Series
This software has a comparator function for abnormality diagnosis based on sound/vibration analysis.You can perform simultaneously the tracking analysis and pass/fail judgment for 2 revolution input channels.It is ideal for vibration analysis of CVT and in-line 100% inspection such as carrier noise analysis of motors.
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Acoustic Analysis
Includes cursor readout of dB bands, max & min lines, noise curve overlays, pink noise generator, and optional STC Transmission Loss.
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GPS Disciplined Oscillator
GDX Series 3.5” x 2.5” x 0.6”
*Connectorized Package *1 PPS Input from GPS Receiver *Up to Four Fixed-Frequency RF Outputs *Optional Loss of Lock Output *Optional Holdover Alarm Output *Low Phase Noise
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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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Acoustic Analysis
Noise is increasingly the subject of new regulations for the protection of human health and safety as well as for improving the environment in general. As well as sound levels, the perceived sound quality of products from washing machines to vehicles is often an important part of the customer buying decision so must be considered during product development. m+p Analyzer for noise and vibration measurement and analysis provides a full range of capability for these applications. Real-time fractional octave filters satisfy all acoustic applications from simple sound pressure, sound power for equipment legislative requirements, intensity mapping to isolate sources to sound quality metrics for product refinement.
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NI-9210, 4-Channel, 14 S/s Aggregate, ±80 mV C Series Temperature Input Module
785043-01
4-Channel, 14 S/s Aggregate, ±80 mV C Series Temperature Input Module - The NI‑9210 includes anti-aliasing filters, open-thermocouple detection, and cold-junction compensation for high-accuracy thermocouple measurements. The NI‑9210 features NIST‑traceable calibration and a channel‑to‑earth ground double isolation barrier for safety, noise immunity, and high common-mode voltage range.
