Specification :

* * * FOR MORE THAN 12 YEAR' s WE HAVE EXPERIENCES IN THE PROBLEM SOLVING & SOLUTION' s FOR : INTERFERENCE, INTERMODULATION, RECEIVER DESENSITIZATION, TRANSMITTER NOISE and RECEIVER BLOCKING.
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* * MOST OF OUR CUSTOMER HAVE ABOVE MENTIONED PROBLEM BECAUSE THEY USE LOW QUALITY RADIO, ANTENNA, DUPLEXER, COAXIAL CABLES, CONNECTORS. AND ALSO LOW QUALITY INSTALLATION AND SOME ARE MIS USE & DUPLEXER MIS TUNE .
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* * * WE HAVE CAPABILITY & EXPERIENCES MORE THAN 12 YEARS IN THE PROBLEM SOLVING OF INTERFERENCE, INTERMODULATION, AND RECEIVER DENSENZITIZATION.
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* * * * * Intermodulation distortion is nonlinear distortion characterized by the appearance, in the output of a device, of frequencies that are linear combinations of the fundamental frequencies and all harmonics present in the input signals.
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* * * * * Intermodulation is the result of two or more signals of different frequencies being mixed together, forming additional signals at frequencies that are not in general at harmonic frequencies ( integer multiples) of either.
The largest intermodulation products appear at f1 + f2 or f1 - f2 ( second-order intermodulation) , and less so at 2f1 - f2 or 2f2 - f1 ( third order intermodulation) .
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* * * * * The cause for intermodulation is the existence of non-linear characteristics of the according equipment. The theoretical outcome of these nonlinearities can be calculated by conducting a Volterra series of the characteristic, while the usual approximation of those non linearities is obtained by conducting a Taylor series. According to the summands in those series, the above numbering of orders is counted.
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* * * * * Intermodulation is rarely desirable in radio, as it essentially creates spurious emissions, which can create minor to severe interference to other operations on the resulting frequency
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* * * * * Harmonic components themselves are not usually considered to characterize intermodulation distortion. When the harmonics are included as part of the distortion, a statement to that effect should be made. This is usually considered Total harmonic distortion.
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* * * * * IMD in its most basic and most testable form shows up as presence of frequencies not in the input signal. If the sum of two pure tones is the input to the system, IMD shows up as the presence of new tones in the output whose frequencies are the sum and difference of the input tone frequencies.
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FOR ANALYZING & MEASURING ABOVE MENTIONED TASK - SERVICES WE HAVE OUR OWN TEST MEASURING EQUIPMENTS FOR SUPPORT THE INTERFERENCE - INTERMODULATION FINDINGS

SPECTRUM ANALYZERS
SIGNAL ANALYZER
VECTOR NETWORK ANALYZER
SIGNAL GENERATORS
VSWR ANALYZER
QUALIFIED ENGINEERS
ANTENNAS
HIGH QUALITY COAXIAL CABLE
MOBILE MEASUREMENT SYSTEM
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* * * * * * FOR MORE DETAIL INFORMATION, PLEASE VISIT :
www.rfpropagation.com
www.rfsolution.info