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Frequency Standards

Devices that produce a known frequency.

See Also: Hydrogen Frequency Standards, Rubidium Standards, GPS Clocks


Showing results: 451 - 465 of 474 items found.

  • Test Fixture, Shielding Effectiveness

    EM-2108 | 1.5 GHz – 10 GHz - Electro-Metrics Corp.

    The EM-2108 is a standard test fixture for evaluation of the electromagnetic shielding effectiveness (SE) of planar materials. The fixture is a section of coaxial transmission line broken to allow the insertion of planar test materials. Although ASTM D4935-10 is currently limited to an upper frequency of 1.5 GHz, the EM-2108 meets and complies fully with both the impedance and SE requirements called out in ASTM test method D4935-10 up to 10 GHz. These results are shown in Figures 1 & 2. The measured data relates to the shielding effectiveness due to a plane wave (far field EM wave) from which near field values for magnetic and electric fields may be inferred.

  • Real-time Spectrum Analyzers

    SSA3000X-R - SIGLENT Technologies

    The SIGLENT SSA3000X-R real-time spectrum analyzers are powerful and flexible tools for complex RF signal monitor and analysis. With a capability of 40 MHz analysis bandwidth and 7.2 µs 100% POI, the analyzer can provide multi-dimensions data displays, advanced triggering, and RF data capturing, to solve modern RF spectrum challenges, like hopping frequency, conflict channel, spectrum interference, etc. They also provide standard tracking generator for network analysis, optional wideband digital modulation analysis, and EMI pre-compliance test. Applications include broadcast monitoring/evaluation, cellular site, IoT, WiFi, Bluetooth surveying, research and development, education, production, and maintenance.

  • Compact Juno USB Interface

    Juno 7Z01250 - mks Ophir

    *Virtual laser power meter - From sensor to interface to PC - no power source needed*Plug and play with all standard Ophir smart sensors*Use with StarViewer free Android app to turn your smartphone / tablet into a power meter*Record every energy pulse at up to 10 KHz*Log power and energy, average, statistics, histograms and more with included StarLab application*New: Pulsed Power measurements with Thermopile sensors*New: Low Frequency Power on Photodiode sensors - power measurement based on pulse cycle (for VCSEL)*System Integrator Tools included: LabVIEW VIs, COM Object Interface*Very compact - is just an extension of the smart plug

  • Radio Test Set

    CMA180 - Rohde & Schwarz GmbH & Co. KG

    With its frequency range from 100 kHz to 3 GHz, the R&S®CMA180 is ideal for testing all common analog and digital radio systems. Input levels up to 150 W are no problem for the R&S®CMA180. The flexible internal switching capabilities for the audio and RF paths make the R&S®CMA180 suitable for a wide range of test requirements. Users can configure the internal generators, external audio sources, filters and measurements according to the given application. In the predefined test scenarios for receiver, transmitter and duplex tests, the RF and audio paths are preconfigured. This saves time and eliminates configuration errors for standard test cases.

  • AC Power Source

    6500 series - Chroma ATE Inc.

    The global AC power testing requirements demand more sophisticated AC Power Source that is capable of simulating a wide variety of AC line conditions, harmonic waveforms, accurate power measurement and analysis. The Chroma 6500 series Programmable AC Power Source delivers the right solution to simulate all kinds of normal/abnormal input conditions and measure the critical characteristics of the product under test. It can be used for R&D design characterization, production testing, and QA verification of commercial, industrial, and aerospace electronic products. The Chroma 6500 series delivers maximum rated power for any output voltage up to 300 Vac, and at any frequency between 15Hz to 2000Hz. It is suitable for commercial applications (47-63Hz); for avionics,marine, military applications at 400Hz or higher frequency; or for electrical motor, air-conditioner test applications at 20Hz. All models generate very clean sine or square waveforms output with typical distortion less than 0.5%. The Chroma 6500 series has built-in Direct Digital Synthesis (DDS) Waveform Generator to provide user programmable high precision waveform. For testing products under AC line distortion conditions, clipped sinewave can be generated with 0% to 43% distortion and amplitude from 0% to 100%. It also can simulate all kinds of power line disturbances such as cycle dropout, transient spike, brown out, phase angle, voltage and frequency ramp up (ramp down), etc.. Up to 30 harmonic waveforms are factory installed, and testing for compliance to AC line harmonic immunity standards can be easily achieved in the field.

  • Terminations

    Pasternack Enterprises, Inc.

    Our RF termination loads (also know as terminators) are available in 1.85mm, 2.4mm, 2.92mm, 4.1/9.5, 4.3-10, 7/16 DIN, BMA, BNC, Type C, Mini SMP, MMCX, Type N, QMA, SMA, SMB, SMC, SMP, SSMC and TNC connector types. RF termination loads from Pasternack are organized into two categories, feed-thru terminations and RF terminations. Pasternack Enterprises RF load terminations include precision and standard versions and many are RoHS and REACH compliant. 0.25 Watts, 0.5 Watts, 1 Watts, 2 Watts, 5 Watts, 10 Watts, 25 Watts, 50 Watts and 100 Watts models. Pasternack RF terminations are offered with impedances of 50 Ohm, 75 Ohm or 93 Ohm. The frequency ratings for these RF coaxial load termination range from DC to 50 GHz. RF loads are available in female, jack, male, male to female and plug genders. Our RF termination loads varieties are RoHS and REACH compliant. As with our other over 40,000 RF, microwave and millimeter wave components from Pasternack, this RF terminator series is in-stock. Not just in stock, but also these RF terminations will ship the same day as they are purchased from Pasternack.

  • IRIG Time Code Receiver & Generator Module

    TCR180 - Meinberg Funkuhren GmbH & Co. KG

    The module TCR180 has been designed to receive and to generate IRIG-A/B/G, IEEE 1344, IEEE C37.118 or AFNOR NF S87-500 time codes. It is used in applications like data acquisition, standalone computer time synchronization (for systems without a network connection or higher accuracy requirements) or as an IRIG converter device. The frequency locking of the master oscillator to the time code system enables this module to generate fixed and programmable standard frequencies with high accuracy and stability. Various oscillator options allow the cost efficient implementation of different requirements concerning the accurracy of the outputs. The generator of the IMS-TCR module generates pulses per second and per minute and per hour. Four programmable outputs are also available. The pulses are synchronized to UTC-second.

  • Broadband Amplifier - 4kHz to 6GHz with High Power Density

    BBA150 - Rohde & Schwarz GmbH & Co. KG

    The R&S®BBA150 broadband amplifiers cover a total of five frequency bands: 9 kHz to 250 MHz, 4 kHz to 400 MHz, 80 MHz to 1 GHz, 0.69 GHz to 3.2 GHz and 2.5 GHz to 6 GHz. They can be used to address a variety of applications, including the various standards for EMS measurements up to 6 GHz. In the industry environment, the R&S®BBA150 broadband amplifiers are suitable for development and product validation tests in quality assurance and in the development and production of components. Other fields of use include research, physical engineering and communications. The compact and modular design allows single band or multi band configurations in 4HU desktops or in 19" racks for high power.

  • Power Phase Converter Single phase 220VAC to 3 phase 380VAC Converter

    SDT-40KW - Zhejiang Sandi Electric Co., Ltd

    SANDI SDT series single-phase to three-phase converter, adopted SVPWM modulation control technology, which can convert ordinary single-phase power to industrial three-phase power. After through SDT series single-phase to three phase converter power conversion, the three-phase power output is standard pure sine wave, the harmonic distortion rate (THD) is less than 2%, totally meet the national standards of three-phase power quality, applicable to all types of load.The SDT series single-phase to three-phase converter can solve production inconvenience because of some areas with the three-phase electric power restrictions, also solved some user requirements that can?謒?apply for the three-phase electric because of space limitation.Features1) Using the fifth generation efficient IPM intelligent module from Japanese Mitsubishi, high efficiency and stable performance. It with powerful protection function, the protection for short circuit, over load, over temperature is more safe and reliable. It's service life can up to 15 years or more.2) Two kinds of start mode: Reduction Voltage Start and Variable Frequency Start. Customers can set start mode according to the type of their load. This function is very convenient for users and also reduce frequency converter?謒?usage, which reduced the cost of equipment investment, easy to connect wires and control.3) Pure sine wave output with good transient response less than 50ms, waveform distortion is very little, higher conversion efficiency and stable output voltage.4) Adopted low frequency transformer which ensure the input voltage and output voltage are completely electrical isolated to avoid interference.5) Using SVPWM space vector algorithms, high conversion efficiency, high instantaneous power and low losses conversion efficiency up to 94%.6) Output AC Power is suitable for all types of electric appliances, electric tools, electric motors etc. higher capability of driving load.7) Converter has the function of filtering the grid disturbance and interference at the same time, which is a good performance of stabilized voltage and frequency power, to provide a more stable and pure power supply environment for the backend devices.8) Output perfect protection function, with output over-voltage, overload, short circuit, over temperature, self-diagnosis protection and other protection.9) High conversion efficiency, high instantaneous power and low load loss.10) The input voltage, output voltage, frequency and phase can be custom made.SpecificationModel SDT-40KWIsolation mode Low Frequency TransformerAC InputRated voltage (Vac) 240V single-phase 60HZVoltage range (Vac) 190-270VInput current (A) 167AAC OutputRated power (KW) 40KWRated voltage 240V ± 2%Output phases Three-phase with Neutral wires (L1, L2, L3 + N)Rated current (A) 96AOutput frequency 60Hz ±0.05 (50HZ can be set)Waveform Pure sine waveVoltage accuracy Load balancing≤1%、Unbalanced load≤5%Waveform distortion rate (THD) Linear load≤2%、Nonlinear load≤3%Dynamic Response 5%,≤50ms (load 0~100%)Power Factor (PF) 0.99Inverter Efficiency ≧85%Electrical insulation properties 2000Vac、1 MinuteProtection FunctionOverload Ability 150%、10sProtection Input under voltage, overvoltage, output over-current, short circuit, overheating etc.Display LCD+LEDMethod of working Working continuouslyCooling method Intelligent fan coolingShort-circuit protection No automatic recovery, need to restart the machineWorking Environment & Mechanical dimensionDegree of protection IP20 (indoor)Working Altitude(m) ≤3000mWorking temperature (℃) -20~+50℃Relative humidity (℃) -25~+85℃Noise (1 meter) ≤60dBReference size: (W x D x H) 750×750×1480mmReference net weight (Kg) 340Kg

  • High Performance Programmable AC Power Supply

    IT7600 Series - I-TECH Electronic Co., Ltd

    IT7600series high performance programmable AC power supplies, adopt advanced digital signal processing technology, with frequency up to 10-5000 Hz, built-inall-round power meter and large-screen oscilloscope function. Power up to 54kVA and support master-slave parallel, which can provide high-capacitysingle-phase or three-phase AC output. Some single-phase or three-phase products can be easily upgraded toAC600V (three-phase star connection downline voltage up to 1000V) output. IT7600 has built-in arbitrary waveform generator to simulate the harmonic and avariety of arbitrary waveforms output; also has strong exchange measurement and analysis functions. IT7600 can be widely used in many areas, such as newenergy, home appliances, power electronics, avionics, military, the development and application of IEC standard test and so on.

  • Multifunctional Meter

    CPM-10 - Chuan Sheng Electronics Co., Ltd.

    CPM-10 Multifunction Power meter measure single phase 2 wire ,single phase 3 wire, three phase 3 Wire and 3 Phase 4 wire systems with high accuracy measurement for parameters such as voltage, current ,active power, reactive power, apparent power, power factor ,frequency, effective energy (V,A,W,Watt-Hr,Var,Var-Hr,VA,PF,Hz), having LED display and standard communication RTU Modbus RS485..Optional functions 1 set relay output,1 analogue,1 RS485 (ModbusRTU Mode) or 1 pulse output. Most suitable for power management,remote input /output, alarm and remote signal control uses needs.Case depth 120mm only, easy panel mounting installation

  • Qualification and Quality Control Tests

    Techsquare - Techimp HQ S.r.L

    New IEC standards, IEC 60034-18-41 and IEC 60034-18-42, have been issued to define the procedures for testing partial discharge inception voltage and the long-term performance (endurance) of Type I and Type II insulation systems used in rotating machines fed from voltage converters. Voltage impulse generators are required at least to test turn insulation, but they would be recommended for any testing under power electronics supply because of their capability to simulate the real electrical stress conditions. More generally, any type of electrical insulation system when subject to impulsive voltage waveform during life should be carefully evaluated in terms of partial discharge and endurance behaviour. This is why voltage impulse generators able to provide impulses with controlled amplitude and frequency are needed to face this new testing challenge.

  • PXIe-5831, 44 GHz, 1 GHz Bandwidth PXI Vector Signal Transceiver

    786853-01 - NI

    44 GHz, 1 GHz Bandwidth PXI Vector Signal Transceiver - The PXIe-5831 supports validation and production test into mmWave frequency bands. The PXIe-5831 incorporates a vector signal generator, vector signal analyzer, and high-speed serial interface with FPGA-based real-time signal processing and control. The PXIe‑5831 combines fast measurement speed and the small form factor of a production test box with the flexibility and high performance of R&D-grade box instruments, making it an ideal solution in both the lab and the production floor. The PXIe-5831 meets the stringent challenges of 5G New Radio, but it is also able to test a variety of cellular and wireless standards such as Wi-Fi 6. In addition, you can easily expand a test system in the PXI Express form factor to support multiple input, multiple output (MIMO) configurations with phase-coherent synchronization.

  • PXIe-5831, 44 GHz, 1 GHz Bandwidth PXI Vector Signal Transceiver

    786856-01 - NI

    44 GHz, 1 GHz Bandwidth PXI Vector Signal Transceiver - The PXIe-5831 supports validation and production test into mmWave frequency bands. The PXIe-5831 incorporates a vector signal generator, vector signal analyzer, and high-speed serial interface with FPGA-based real-time signal processing and control. The PXIe‑5831 combines fast measurement speed and the small form factor of a production test box with the flexibility and high performance of R&D-grade box instruments, making it an ideal solution in both the lab and the production floor. The PXIe-5831 meets the stringent challenges of 5G New Radio, but it is also able to test a variety of cellular and wireless standards such as Wi-Fi 6. In addition, you can easily expand a test system in the PXI Express form factor to support multiple input, multiple output (MIMO) configurations with phase-coherent synchronization.

  • Dielectric Breakdown Voltage and Dielectric Strength

    ASTM D149 - National Technical Systems

    This test method covers procedures for the determination of dielectric strength of solid insulating materials at commercial power frequencies, under specified conditions. Unless otherwise specified, the tests shall be made at 60 Hz. However, this test method is suitable for use at any frequency from 25 to 800 Hz. At frequencies above 800 Hz, dielectric heating is a potential problem. This test method is intended to be used in conjunction with any ASTM standard or other document that refers to this test method. References to this document need to specify the particular options to be used. It is suitable for use at various temperatures, and in any suitable gaseous or liquid surrounding medium. This test method is not intended for measuring the dielectric strength of materials that are fluid under the conditions of test. This test method is not intended for use in determining intrinsic dielectric strength, direct-voltage dielectric strength, or thermal failure under electrical stress (see Test Method ASTM D3151). This test method is most commonly used to determine the dielectric breakdown voltage through the thickness of a test specimen (puncture). It is also suitable for use to determine dielectric breakdown voltage along the interface between a solid specimen and a gaseous or liquid surrounding medium (flashover). This test method is similar to IEC Publication 243-1. All procedures in this method are included in IEC 243-1. Differences between this method and IEC 243-1 are largely editorial. Note: The above information is taken directly from the test method Scope published in ASTM D149.

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