Noise
a signal's fluctuation other than that desired.
See Also: Pink Noise, White Noise, RF Noise, Distortion, NVH
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Product
PXI Dual 4 to 1 RF Multiplexer 3GHz 50 Ohm SMB
40-872-002
Multiplexer Module
The 40-872-002 is a 50 Ohm 4 to 1 PXI RF MUX with 2 banks in a single PXI slot. It exhibits low insertion loss and VSWR through the use of modern RF relay technology at an affordable cost. Each MUX has been carefully designed to ensure excellent and repeatable RF characteristics to frequencies of 3GHz with each path having a nominally equal insertion loss. The injection of noise and unwanted signals into the signal paths of this RF MUX has been minimized by careful attention to the mechanical and electrical design.
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Product
THz Pulsed Imaging and Spectroscopy
TeraPulse 4000
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TeraView’s proprietary semiconductor technology gives the TeraPulse 4000 a market leading signal-to-noise specification with over 90 dB at peak. As standard, the TeraPulse offers a bandwidth of 60 GHz up to typically 4.5 THz; with an option to extend this beyond 6 THz.
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Product
Sound Level Meters
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Larson Davis manufactures a wide range of Advanced Sound Level Meters to meet all your environmental noise monitoring application needs.
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Product
Microwave Components
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We are a worldwide leader in the design, development and manufacture of radio-frequency and microwave components, and our product portfolio is one of the most comprehensive anywhere in the world.Our magnetrons, performance monitors, low noise front ends, circulators, loads, limiters and receiver protectors are trusted to power every type of commercial radar application, including airborne, navigation and guidance devices, radar and sonar equipment and electronic surveillance systems.
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Product
Impulsive Sound Source
BAS006
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The BAS006 is an innovative device used to create impulsive noise that includes low frequency energy and avoids problems like secondary bounce. These characteristics make it a great choice for quickly measuring reverberation time when the complexity and weight of a speaker and amplifier is not needed.
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Product
ELT STALKER Vector-finder
VF-121
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The Vector-Finder Types VF-121 and VF 121A are unique in the Vector-finder series of direction finding antennas. They incorporate a proven design, electro statically shielded loop sensing element with modern solid state low noise analog and digital technology to allow detection and location of aircraft band signals. Both the VF-121 and the VF 121A incorporate a unique digital modulator which allows the user to more easily home-in on unmodulated carriers. Such cases occur at airports when transmitter may be accidentally keyed on during aircraft overnight layovers. The VF-121 is specifically designed to be used on airport premises where signal strengths are high. To compensate for very strong signals, an integral attenuator is also incorporated to allow the user to operate the unit close-in to aircraft. The VF-121A differs in that a high gain, low-noise preamplifier is utilized with the sensing element in order to hunt signals that may be weak or at a distance. The unit is ideally suited for the location of ELT transmitters in the field. Both units are tunable over the 118 MHz to 130 MHz aircraft frequencies and interface directly to the user’s aircraft band receiver or transceiver via the antenna jack. With the antenna system connected to the receiver, the user will hear the desired signal. If the signal is unmodulated, the digital modulator will generate a tone on the carrier. When the handheld unit is rotated about, an audible null on the received signal or the generated tone will be heard. This null aligns with the axis of the equipment case and represents the direction of the received signal. This direction may be read from the black dial compass mounted on the top of the enclosure. As the response is bi-directional, triangulation may be used to determine the true bearing when the true direction is not known.
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Product
PXI/PXIe RF Multiplexer, Single 16-Channel, 3GHz, 75Ω, SMB
42-835A-001
Multiplexer Module
The 40-835A-001 (PXI) and 42-835A-001 (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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Product
Driver Amplifiers
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Analog Devices RF amplifiers are designed utilizing the company’s leading amplifier and RF IC expertise. Our extensive family of single-ended input/output, fixed-gain amplifiers can be used from dc to microwave and include gain blocks, low noise amplifiers, intermediate frequency amplifiers, driver amplifiers, and differential amplifiers. These devices offer high linearity, low noise figures, and various fixed-gain options, as well as low power consumption; they are all fully specified over frequency, temperature, and supply voltage for use in a variety of applications.
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Product
Phase Noise Testing
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The systems are based in the UK although testing for any company world wide will be undertaken.
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Product
Special / Customer Spec. Crates
6U VME64x 4500
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The WIENER VME 4500 crate series is a compact new generation of 19" integrated packaging system with frontal cooling air intake for standard VME64x 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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Product
Special / Customer Spec. Crates
6U VME64x NIX-I
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The low-cost / industry standard VME64x NIX-I series, provides basic, full size VME crates with low noise 6000 series based power supply technology and a removable fan tray.
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Product
VECTOR-GUN HANDHELD DIRECTION FINDING ANTENNA SYSTEM
HFDF
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National RF's Type HFDF active directional antenna system consists of a high gain RF amplifier coupled to a tunable Faraday shielded loop antenna. Several loop antenna assemblies are available to provide coverage of frequencies in the HF and low VHF spectrum. Due to the nature of a Faraday shielded loop, the antenna exhibits a sharp null through the diametric center of the loop. This null is used to determine the direction of incoming radio signals or to locate electrical noise being radiated from some source. The internal high gain amplifier is used to compensate for the inherent inefficiency of the actual loop at the operating frequency. Overall, the system dynamic response is about +6 dB as compared to the dynamic response of a dipole. To aid in the direction finding process on strong signals, an internal 30 DB attenuator is provided. As the loop antenna presents a bi-directional response, tri-angulation may be required to eliminate the ambiguous signal direction. The line of site of the incoming signal is determined by listening for a signal null on the receiver or by watching the receiver’s S-meter.
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Product
2-Axis High-Resolution Laser Axis Board for VME
10898D
Laser Board
The 10898D 2-axis high-resolution laser axis board provides the same resolution as the Keysight 10897D high-resolution laser axis board with increased slew rates and reduced noise. The increased stage velocity limits and low noise compared to previous laser systems offer premium positioning repeatability and accuracy for advanced applications such as IC fabrication equipment.
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Product
30W Power Supply, 35V, 0.8A or 60V, 0.5A
E3641A
Power Supply
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. The Keysight 30W, single output E3641A is a stable and reliable power supply for benchtop and basic automated test applications, and enables versatile solutions for tests that require moderate speed and precision with both GPIB and RS232.
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Product
Amplifiers
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Becker Nachrichtentechnik GmbH
Becker Nachrichtentechnik GmbH offers a large portfolio of high performance broadband RF amplifiers. Optimized for linearity, high dynamic range and low noise, they cover all widely used radio standards like cellular, satellite radio, TETRA/BOS, GNSS, GPS, 802.11, including the new bands for LTE-U. They amplify wideband radio signals from shortwave over UHF, VHF up to 18 GHz in 50 Ohm technology (I-band, G-band, P-band, L-band, S-band, C-band and X-band). They are used as compact RF drivers, antenna pre-amplifiers or RF boosters in a variety of applications ranging from tunnel radio coverage extension, over airspace radio monitoring to in-ear monitoring and can also be offered as 1U 19” rack variants. Due to their advanced design, the power consumption is significant lower than typical industry alternatives, saving cost at customers with respect to cooling.
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Product
DC Power Supply, 0-120 V, 0-1.5 A, 180 W, GPIB
N6700
DC Power Supply
Keysight high performance DC power supplies offer speed and accuracy for test optimization. The single output, 200 W, GPIB 6641A-6645A provide fast, low-noise outputs; analog control of output voltage and current; fan-speed control to minimize acoustic noise; as well as parallel and series connections of multiple units.
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Product
Saluki SE1201 DSP Lock-In Amplifier
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SE1201 Small-sized Digital Lock-in Amplifier provides an excellent performance within its bandwidth from 50 mHz to 120 kHz. With the high-speed 4-core architecture, high-precision ADC and excellent analog performance, SE1201 can easily detect the phase and the magnitude of weak signals overwhelmed by various large noise. The performance of SE1201 is as good as other lock-in amplifiers brands, even better in some certain parameters, such as measurement accuracy, operating bandwidth, which meets the needs of scientific research and industrial application well.
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Product
Amplifier Module
LNAM-B
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Fully differential ultra-low-noise voltage amplifier module (LNAM) with selected bipolar rf transistors at the input stage. The amplifier exhibits ultra-low voltage noise, very high speed, and good dc precision. 50 Ohm input termination realized by negative feedback allows for the lowest possible noise temperature.
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Product
NIST Calibration for D620-A
D620-A-CCNIST
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- Choice of 4 GHz or 6 GHz bandwidth models- Up to 5 Vpk-pk dynamic range with low noise- ±3 V offset range- Low loading and high impedance for minimal signal disturbance- Ideal for DDR2, DDR3, LPDDR2- Deluxe soft carrying case- Innovative QuickLink architecture- Wide variety of tips and leads-- Solder-In Lead-- Optional Positioner (Browser) Tip-- Quick Connect Lead-- Square Pin Lead-- HiTemp Solder-In Lead
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Product
Power Supplier QS305 30V / 5A
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*16 hours at full load*Low ripple and noise*Automatic switching CV / CC*Aluminum heat sink*Displays 3 or 4 digit depending on the model
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Product
Multimode Data Controller
PK-232/PSK
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Timewave’s customers swear by their DSP filters and PK-232 owners love the flexibility and reliability of the most popular data controller ever built. Now with the addition of a sound card interface, the PK-232/PSK rolls it all into one! The PK-232/PSK brings a new level of performance to the legendary PK-232 with sharp, accurate DSP filters for all its internal data modes and dual transformer isolation for sound card data modes. Weak signals magically appear from the noise and QRM bounces off the new DSP filters for cleaner copy with fewer errors than the old analog filters.
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Product
HD Thermal Camera
T1010
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The T1010 uses the power of FLIR Vision Processing™ to deliver detailed, smooth pictures with very little image noise. FLIR Vision Processing combines HD resolution, MSX®, and UltraMax® image enhancement with FLIR's proprietary adaptive filtering algorithms to produce brilliant thermal images with up to 3.1 million pixels. Plus, the T1010 is sensitive enough to detect temperature differences down to <20 mK, for clear, low-noise results that keep you from missing any potential issues during inspections. 1024 × 768 true HD resolution images, with thermal measurements up to 650°C (1202°F).
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Product
28/45 GHz Single Optical Channel DCA-M with Option CDR
N1092A
Oscilloscope
High accuracy, low cost solution for optical waveform analysis including solutions for 8.4 through 64 GBaud, very low noise and jitter, fast sampling rates for high throughput, and integrated clock recovery available.
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Product
C Series Current Output Module
Input/Output Module
The C Series Current Output Module features up to eight channels of simultaneous analog output. You can choose between enclosed and non-enclosed modules. Additionally, the C Series Current Output Module has built-in open-loop detection. This detection generates an interrupt in software when an open loop is detected, zeros outputs to ensure safety, and avoids driving actuators at system power-on. The C Series Current Output Module requires an external power supply and includes a channel-to-earth ground double isolation barrier for safety and noise immunity.The C Series Current Output Module includes the NI-DAQmx driver and configuration utility that simplify configuration and measurements. NI-DAQmx supports NI programming environments as well as Python, ANSI C, C#.NET, and MathWorks MATLAB® software.
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Product
Burst-Generator
SFT 1420
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The test generator SFT 1420 simulates quick transient noise interference as they are defined in the standard IEC / EN 61000-4-4. The single pulses show a very short rise-time (5 ns) and due to this a wide RF-spectrum up to 300 MHz. RF interferences are the result.
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Product
RF Synthesizer
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RF Lambda’s synthesizer modules are wideband DDS driven signal sources in a variety of frequency ranges. They offer extremely fine frequency step size and low phase noise as well as output level control. They are easy to configure with the included GUI and USB interface.
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Product
Electromagnetic anechoic box/Shield box/Anechoic chamber
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The necessity of a wireless system test has risen by the spread of recent wireless telecommunication equipment as shown in cellular phone, wireless LAN, RF-ID tag and ETC (Electronic Toll Collection system). It is necessary for a wireless test to be performed in anechoic environment in which an external noise is intercepted and a radio wave does not reflect internally. An anechoic chamber (room version of a shield box) is proper facilities but needs a wide space and a huge cost. Especially, the equipment under wireless system test on the production line can not radiate any signal radio wave outside before approval. The shield box satisfies these conditions.
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Product
JFET Voltage Preamplifier
SIM910
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Stanford Research Systems, Inc.
The SIM910 and SIM911 are low-noise, programmable preamplifiers which are ideal for a wide range of small signal applications. The primary differences between the two models are their input impedance and input noise.
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Product
Rack-Mounted Timing Systems
CommSync II Family
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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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Product
REMOTE-CONTROLLED SIGNAL GENERATOR
ASX-16C/D
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Matrix Test Equipment Incorporated
The Model ASX-16C/D is a newer design version of the standard Model ASX-16C. The use of enhanced technology allows greater frequency trim (+/- 25 KHz) while maintaining the excellent noise and distortion performance of the ASX-16C. The Model ASX-16C/D also provides linear monotonic carrier level control over a 15 dB range in 0.025 dB steps
