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THD

Is a measure of a signal's sum power of all harmonic components to the power of the fundamental frequency.

See Also: Total Harmonic Distortion


Showing results: 31 - 42 of 42 items found.

  • Audio Test Software

    Soft Hearts LLC

    1. Distortion free stimulus even the equalized stimulus.2. Unlimited channels acquisition and processing. (Hardware limited)3. Human correlated listening test(Bark Scale intensity chart). (Requires large memory)4. Hi Res intensity chart for buzz/pop detection. (Requires large memory)5. Auto equalization method with target dBSPL accuracy.6. TCP client for test framework integration.7. Easy limits and logs development.8. Easy logs visualization module.9. Auto waveform alignment and triggering.(Upto single point alignment accuracy)10. Easy regression testing via TCP client.11. Standard Magnitude, Phase, THD, THD+N, Rubb&Buzz, Pink Noise, Noise Tests.12. Unlimited calibrations and equalization for scaling to different products and stations.13. Lowest test system and test sequence development times.14. Requires minimal training and debugging.15. Automatically avoid Reference speaker play and stop pops.16. WMD/ASIO driver compatible sound cards supported.(B&K 3670 recommended)

  • Digital Power Meter (High Accuracy Model)

    LS2050 - Lisun Electronics Inc.

    LS2050 digital power meter is a new generation intelligent product which adopts digital sampling technology to analysis of the waveform. It has the following features: • Three windows digital display which reduces reading error, intuitive and convenient • Adopts high speed MCU and high precision A/D to control and measurement • All measured data as virtual value, also suit to signal waveform distortion • Fast test • Equipped with RS232 communicate function, can use upper computer software to carry on remote operation, control and read corresponding data, the test data and waveform could be displayed in the PC, Chinese and English operation interface, high intelligent instrument • This instrument provides two kinds of method to calculate total harmonic distortion (THD), IEC and CSA.

  • Eco-Power Meters

    Panasonic Automotive & Industrial Systems Europe GmbH

    Main unit expandable with up to 3 expansion unitsEach unit can measure up to 2 circuits (8 circuits with 3 expansion units)Accuracy: 0.2% for V, I and 0.5% for kWhPower quality measurements (THD and harmonic analysis up to the 31st order)Bidirectional energy measurement (energy produced and energy consumed)Demand measurementWeb server functionality integratedNo hub switch required2 Ethernet ports, 1 RS485 interface1 input, 2 outputsHour meter functionalityDIN rail mountingQuick wiring thanks to push-in terminalsIEC61010-1 CAT III

  • CCFL Ballast Tester

    WT2000A-CCFL - Lisun Electronics Inc.

    This tester is specially designed for analyzing the electrical characteristics of CCFL Electronic Ballast, meets the test requirements in international standard• Input characteristics analysis: measure Vrms, Irms, W, PF, Hz, phase angle Measure THD, 0 to 39th harmonic components, Accuracy: ±(0.4% reading+0.1% range+1 digit)• Output characteristics analysis: measure lamp voltage, lamp current, lamp power, oscillatory frequency, crest factor of lamp current, Accuracy: Class 2• Interface RS-232C provided for easier communication with PC for printing test report

  • PXIe-4463, 51.2 kS/s, 2-Output PXI Sound and Vibration Module

    783086-01 - NI

    The PXIe‑4463 offers high dynamic range and THD+N for audio, acoustic, and vibration applications. It provides the high precision and dynamic range necessary for the most stringent audio generation requirements in a modular form … factor. The PXIe‑4463 contains two 24-bit digital‑to‑analog converters to allow for fully differential simultaneous generation. Complete with three gain ranges, the PXIe‑4463 can generate current with programmable, per channel output configurations. The two timing engines allow you to perform multisample-rate applications on a single module and independently start and stop channels on a single module.

  • Multifunctional Meter

    CPM-80 - Chuan Sheng Electronics Co., Ltd.

    CPM-80 multifunction power analyzer provide high accuracy single phase and three-phase energy measuring and displaying, energy accumulating, power quality analysis, data logging and data communication. CPM-80 series meters are able to measure bidirectional, four quadrants kWh and kVarh. It provides maximum/minimum records for power usage and power demand parameters. Hardware standard built in a RS485 Modbus communication port , 4 Digital inputs, 2 Relay outputs, LCM and 2MB flash for data-logging. In addition , also provide TOU , voltage and current THD, harmonics up to the 63rd and auto wiring change via software .

  • Adjustable High Frequency Reference Ballast

    HCS-109A - Lisun Electronics Inc.

    HCS-109A Adjustable High Frequency Reference Ballast also called High Frequency Current Source. Comparing to IEC Test Method, HCS-109A is an Equivalent Test Method which is economic solution. HCS-109A equipped with Spectrophotometer & Integrating Sphere Test System. It can also measure the photo, color and electricity parameters for high frequency fluorescent lamp.Specifications: • Input voltage: 200V~240V, 50/60Hz • Input Power: 80 W max • Output Current: 130mA~400mA (Adjustable), accuracy: +/- 1% • Output Frequency: 25kHz< +/-2.0% (Adjustable), accuracy: +/- 0.3kHz • Output current total harmonic wave distortion: THD<2.5% (HF current wave)

  • PXIe-4463, 51.2 kS/s, 2-Output PXI Sound and Vibration Module

    783086-02 - NI

    51.2 kS/s, 2-Output PXI Sound and Vibration Module - The PXIe‑4463 offers high dynamic range and THD+N for audio, acoustic, and vibration applications. It provides the high precision and dynamic range necessary for the most stringent audio generation requirements in a modular form factor. The PXIe‑4463 contains two 24-bit digital‑to‑analog converters to allow for fully differential simultaneous generation. Complete with three gain ranges, the PXIe‑4463 can generate current with programmable, per channel output configurations. The two timing engines allow you to perform multisample-rate applications on a single module and independently start and stop channels on a single module.

  • Electroacoustic Analysis System

    CRY6151B - CRYSOUND

    CRY6151B is a full-featured electroacoustic tester newly launched by CRY Sound. It is powerful and stable. It can measure the performance indicators of headphones (USB, Bluetooth, anti-noise), microphones (electret, MEMS, moving-coil type), headphone and microphone assemblies, receivers/headphone speakers, speakers/loudspeakers (common, Bluetooth), loudspeaker crossover devices, and other electroacoustic devices, such as sensitivity (SPL), impedance, distortion (THD), resonance frequency F0, left and right headphone balance, left and right headphone position, phase polarity, microphone current and voltage, SNR, microphone directivity, speaker's TS parameters, telephone receiving and sending loudness ratings, etc. Its test frequency range can be up to 20 Hz - 20 kHz.

  • Production Line Acoustic Test Chamber

    PLATC - Listen Inc

    The Production Line Acoustic Test Chamber from GRAS is designed for quick and qualified acoustic test of cell phones, tablet PCs, Bluetooth speaker systems etc., including frequency response, THD, Rub & Buzz and microphone test using optional sound source. The chamber has a number of connections for injecting test and control signals to the test object (DUT).Benefits include:Repeatable testing and reliable dataEasy open/close for quick and safe change of DUTFlexible test jig for easy adjustment to new DUTFlexible microphone mounting for both front/backside speakers as well as edge-mounted speakersHigh quality, high sensitive 1/4” CCP measurementmicrophone included (G.R.A.S. 46BL)Individually calibrated frequency response** Compared to reference measurement in anechoic room

  • Electroacoustic Analysis System

    CRY6151 - CRYSOUND

    CRY6151 Electroacoustic Analysis System is a full-featured electroacoustic device tester launched by CRY Sound. It has a history of 10 years. It is powerful and stable. It can measure the performance indicators of headphones (USB, Bluetooth, common), microphones (electret, MEMS, moving-coil type), headphone and microphone assemblies, receivers/headphone speakers, speakers/loudspeakers (common, Bluetooth), communication helmets, loudspeaker crossover devices, and other electroacoustic devices, such as sensitivity (SPL), impedance, distortion (THD), resonance frequency F0, left and right headphone balance, left and right headphone position, phase polarity, microphone current and voltage, SNR, microphone directivity, speaker's TS parameters, telephone receiving and sending loudness ratings, etc. Its test frequency range can be up to 20 Hz - 20 kHz.

  • 40kw High Efficiency AC/DC Power Supply Charger 100-750VDC Charging Rectifier 100A Battery Charger

    SD750100G - Zhejiang Sandi Electric Co., Ltd

    40kw High Efficiency AC/DC Power Supply Charger 100-750VDC Charging Rectifier 100A Battery Charger is for DC battery system charging station. With three-phase non neutral conductor AC input, it has the advantages of high efficiency, high power density and low harmonic. 50-500Vdc output voltage range optional, suitable for all types of batteries.FeaturesProduct Introduction:SAND AC/DC Charger is specially developed for DC chargers module. It has high efficiency, high power factor, high power density, high reliability advantage. AC input 3 phase or single phase, DC output voltage range from 100 to 750VDC can be set, compliant with CE safety requirements, EMC standard EN61000-6-3 and EN61000-6-1 Class A, it is an advanced international level charger module.Unique function:● High efficiency over the full load range, full load efficiency greater than 95.5%● Wide output voltage range, 100-750VDC, suitable for a wide range of Lithium and lead acid battery● 5-inch LCD touch screen, easy to operate● Flexible application, charging voltage, charging current, charging time, timing charging can be set by LCD screen, easy to operateMain features:● Powerful protection, overheating, short circuit, overload, overvoltage, undervoltage, etc.● Three phase active power factor correction technology, reduces the harmonic interference to the grid● Dual DSP design, achieve the full digital control, less components means high reliability● Wide input voltage range, allows operation in most poor grid conditions● Soft start charging and soft shutdown minimize the impact on the battery.● Input, output have protective circuit breaker switch● Module adopts hot pluggable design, which is convenient for maintenance.● CAN/RS485 interface (Optional)SpecificationModel SD750100GAC input Input system Three phases + PEVoltage range 280Vac ~500VacRated voltage 440VacFrequency range 50Hz/60HzMaximum current <74AITHD (total harmonic distortion) <5%DC output Output power 40KWVoltage range 50-750Vdc ( can set)Constant power output voltage range 400Vdc-750VdcOutput current range (A) 100A ( 1~100A can set)Output current limit 1-100A continuously adjustableSteady voltage precision <±0.5%Steady current precision ≤±1% (rated range of 20% ~ 100% for output load)Load regulation rate ≤±0.5%Startup overshoot ≤±3%Peak-to-peak value noise ≤1% (200~1000V, 0~20MHz)Display Indication Light Green LED: normal operation,Yellow LED: alarm, Red LED: failureDisplay language EnglishDisplay 5’ LCD touch screenPower factor and THD Power factor ≥0.90 Full-load output power of @20%~50%≥0.98 Full-load output power of @50%~100%≥0.99 Full-load output power, input nominal voltage and frequency of @100%THD ≤5% Full-load output power of @50%~100%Protection function input overvoltage Protection Over Under Voltage automatic shutdown and restart when voltage return normalOutput overvoltage protection Over Under Voltage automatic shutdown and restart when voltage return normalOver-temperature protection Automatic shutdown. Automatic restart when the temperature return to normalShort circuit protection Automatic shutdown and lock, need power off to restart to unlockEfficiency Under Rated input voltage ≥95.2%

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