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In the narrow-band measurement mode of the spectrum analyzer:
peak pulse power =(main lobe amplitude) -(20 log T
eff
/T)
Where:
Teff -pulse width, in second. Second
T——pulse repetition frequency
The phenomenon in which the peak pulse power is not equal to the main lobe amplitude is known as pulse
desensitization. The sensitivity of the spectrum analyzer will not be decreased by the pulse signal. Accurately, pulse
desensitization is caused by distribution of the CW carrier power of pulse modulation to a number of spectrum
components (i.e. carrier and sideband). Therefore, each spectrum only contains part of the total power.
In measurement of the main lobe amplitude, you should change the attenuator of the spectrum analyzer and verify that the main lobe amplitude will not
change accordingly. If the change exceeds 1dB, it indicates that the spectrum analyzer is in the gain compression state. In this case, you must increase
the attenuation amount of the attenuator.
Содержание S3302A
Страница 1: ...S3302 Series Handheld Spectrum Analyzer Datasheet Saluki Technology Inc...
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