Wuxi Guanya Refrigeration Technology co., ltd

Semiconductor refrigeration heating cycle air system test description

There are many test items in the refrigeration and heating circulating air system for semiconductors. So, how much do users know about out-of-channel testing?

The out-of-channel test of the cooling and heating circulating air system for semiconductors refers to the measurement of the frequency bands outside the system frequency. The out-of-channel test is to sample the distortion or interference in the system frequency band, instead of testing the transmission frequency itself. The adjacent channel power ratio (ACPR) test ensures that the transmitter is not interfered by adjacent or spaced channels. ACPR is the ratio of the average power of adjacent channels to the average power of the transmitted channel. Measurements are typically made between channels that are separated by multiple channels (between adjacent channels or spaced channels). When performing ACPR testing, it is important to consider the statistical nature of the transmitted signal, because even for the same transmitter, different signal statistics can result in different ACPR test results. For different standards, the test will usually have different names and definitions.

The cooling signal of the cooling and circulating air system for semiconductors is caused by a combination of different signals in the transmitter. The amplitude of such a signal in the system band must be less than the level specified by the standard to ensure that it has less interference to other communication systems. Harmonics are signal distortions caused by the nonlinearity of the transmitter, and the frequencies of these signals are all integer multiples of the carrier frequency. The test of out-of-channel clutter and harmonics is used to ensure that the interference of this channel to other communication systems is small.

The function of the receiver is basically the reverse process of the transmitter, so the test challenges they bring are also very similar. The receiver must successfully capture the RF signal under potentially interfering conditions, so a front-end selection filter must be used to filter out or attenuate signals outside the system band received by the antenna. The low noise amplifier (LNA) amplifies the amplitude of the target signal, but at the same time ensures that the noise amplitude is increased as little as possible. The downconverter converts the RF signal to a lower frequency intermediate frequency signal by mixing with the local oscillator signal. The mixer's output signal then attenuates the unwanted frequency components produced by the mixer or adjacent channels through the IF filter.

After the relevant test users understand, they can run the test. If there are some use problems in the operation, it is recommended to contact the manufacturer for solution.

(This article source network, if there is infringement, please contact delete, thank you.)

Related News
  • LNEYA Is Exhibiting At Achema 2018

    LNEYA Is Exhibiting At Achema 2018

    January 11, 2018​The LNEYA Group will participate in the ACHEMA -World Forum and Leading Show for the Process Industries,Frankfurt am Main, Germany.view
  • Approaching LNEYA 5 Main Products

    Approaching LNEYA 5 Main Products

    January 11, 2018Industrial Chiller:Industrial Chiller varies from dynamic temp. Special Chiller:Special Chiller consist of Multi-reactor chiller (TCU).Environmental Chamber:The test object is connected to a testing adapter. Industrial Freezer:Industrial freezer consist oview
  • The Analysis Of Ultra Low Freezer'S Price

    The Analysis Of Ultra Low Freezer'S Price

    July 4, 2018What are the characteristics and functions of ultra low freezer: 1. Ultra low freezer can prevent the precision of machine equipment from being influenced by the change of oil temperature in the proce...view
  • The Application of Cold Plate Freezer

    The Application of Cold Plate Freezer

    July 4, 2018The refrigeration system of cold plate freezer adopts secondary super-cooler technology with the rapid refrigeration and low limiting temperature. It uses imported brand name semi-hermetic piston comp...view
  • 2018 Automotive Testing Expo

    2018 Automotive Testing Expo

    September 11, 2018Automotive Testing Expo 9.25-9.27view
  • The Analysis Of How To Maintain The Low Temperature Circulator In Daily Life

    The Analysis Of How To Maintain The Low Temperature Circulator In Daily Life

    July 4, 2018Guanya is a leading role in heating cooling circulator. It provides the customers with proposal and technology of controlling the cold and heat, temperature control system with stable property, extend...view
Related Products
  • SLJ -110℃~-150℃

    SLJ -110℃~-150℃

    January 11, 2018Temperature ranges from - 5 ~ - 150 ℃, can meet different temperature; Adopt environmental protection refrigerants; Famous brand semi-closed piston compressor, semi-closed bipolar piston compressor, semi-hermetic screw compressor, main brand are BOCK.view
  • Single Fluid Heat Transfer System SR

    Single Fluid Heat Transfer System SR

    April 10, 2018Working temperature range from -25℃to 200℃, other temperature range need to set to the widest temperature range(-50℃to 250℃) Centralized control of 2~20 reactors, each reactor's and jacket temperature can be set independently. One system control multipleview
  • Reactor Temperature System ZLF

    Reactor Temperature System ZLF

    April 10, 2018A set of cooling heat exchanger, heat exchanger, through proportional adjusting valve control cold heat into the heat exchanger, then through the uniform medium input to the reactor jacketed to do heat exchange and temp. Control, system has inside expansiview
  • LT -45℃~30℃

    LT -45℃~30℃

    April 10, 2018Low Temperature Cooling Chiller LT model: LT-5018N,LT-5040N,LT-5062N,LT-5090N,LT-50A1N,LT-50A2N; Medium Temperature Range: -45℃~30℃. ASET multifunctional controller, control outlet temperature of water tankview
  • TES -45℃~250℃

    TES -45℃~250℃

    February 28, 2019-45℃~+200℃ 2.5kW~25kW ±0.3℃view
  • TES -85℃~200℃

    TES -85℃~200℃

    February 28, 2019Temperature control range:-85 ° C ~ 200 ° CPower range:2.5kW~25kWTemperature control accuracy:±0.3°CModelTES-8525WTES-8555WTES-85A10WTES-85A15WTES-85A25WTemp. Range-85℃~200℃-85℃~200℃-85℃~200℃-85℃~200℃-85℃~200℃Heating P...view
Tel: + 86 18751545184
E-mail: sales@cnzlj.com
Add: No.203, Hongyun Road, Hongshan Street, Optoelectronics Park, Xinwu District, Wuxi City, Jiangsu Province, China
code chat