Agilent Technologies 11867A? Service Manual Page 85

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Chapter 5 87
Spectrum Analyzer
Measuring Multiple Signals
Spectrum Analyzer
NOTE To determine the resolution capability for intermediate amplitude
differences, assume the filter skirts between the 3 dB and 60 dB points
are parabolic, like an ideal Gaussian filter. The resolution capability is
approximately:
where f is the separation between the signals.
12.04 dB
f
RBW
-------------
⎝⎠
⎛⎞
2
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