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Pulse desensitization for non square pulses

Question asked by oogunlade on Aug 15, 2011
Latest reply on Aug 16, 2011 by tabbott
I have an application where I am characterising the output of a radar transceiver. Because of the high peak power, I am using a coupler and some attenuator padding to stay within my spectrum analyser maximum input power level. The problem is that as my pulses are not nice rectangular pulses I get very different results when define pulse width as teff (as specified in page 5 of Application Note 150-2) compared to when using pulse width given by FWHM.

The two definitions give me -5.87dBm and -4.27dBm peak power respectively. This may not seem like much, but when I add the 79dB (due to the coupler and attenuator padding), the two definitions give me peak power of 20.56KW and 29.71KW respectively, which is now very significant difference!

I attach a file showing the pulse shapes.

Any help appreciated