Measurement of occupied bandwidth of the pulsed radio frequency by the method of sequential spectrum analysis

The paper describes the use of a special apparatus for measuring the occupied bandwidth at a pulsed radio frequency based on sequential spectrum analysis. The basis of the method is the envelope of the pulse spectrum, obtained with the aid of the peak holder. It is necessary to eliminate the effect of internal noise of the spectrum analyzer, because the signal-to-noise ratio of the envelope signal falls owing to the fact that the peak holder indicates the peak value not only of the signal but also of the internal noise. By a simple method of elimination, the ratio can be improved significantly and the error of measurement of the occupied bandwidth can be secured to within plus or minus 5%.