shenzhen baichuan electronics
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LMS4.6 Speaker Comprehensive tester
Tester8121C Signal Generator
8121FT-1 weighting filter
7117C FO tester
1、LMS 4.6is a complete and reasonably priced electro-acoustic analysis system. Whether you are using professional sound systems, home sound systems, car audio, or contracted sound engineering, LMS is the ideal tool for development and testing. No other measurement tool today offers so many outstanding features and functions at such a low cost. Because it and the world similar products appeared earlier, so in the field of domestic electroacoustic has been more popular, is a set of complete performance and reasonable price test systems. LMS offers a wide range of computer-based features with a special focus on meeting the unique requirements of speaker development. It uses burst sound technology to obtain a good frequency response curve; It can get a number of electroacoustic parameters of the loudspeaker in a short time, and it is a useful assistant in the debugging of the frequency divider, which has a wide range of applications.
2、FO 7117C can measure the Fo value of a loudspeaker fully automatically, with no need for manual adjustment of the instrument. The correct Fo value of a loudspeaker is being displayed on the〝 DISPLAY PANEL〞( 14 ) in just 1 to 1.5 seconds. It has many advantages over using a voltmeter with a needle indicator for measuring the Fo value of a loudspeaker:
( a ) Easy to read; ( b ) No visual error; ( c ) High accuracy.
3、Signal Generator 8121C uses a logic circuit to generate “Pseudo-Random Noise”, it is the newest and the most advanced design to generate audio white noise. It has a much flatter frequency response than using a diode. Model-8121C has (1) a White noise source.(2)Weighting filters.(3)Built-in power amplifier.(4)” TRUE RMS ” voltage meter circuit. It can generate five different kinds of the noise spectrum, including White Noise, Pink Noise, and three kinds of “Weighted Noise”, conforms to the following nation’s standards:(1) JIS C5531, IEEE 219, CNS 4785 (2) EIA 426B(3) DIN 45573
4、Weighting filter 8121FT-1 is the weighting filter made by the IEC-268-1 requirement, it must link with either Model-8121C , to enable it to generate weighting noise filter that complied with IEC-268-1 requirements, for undergoing the life testing of the loudspeaker and defining the rated power of the loudspeaker