Chapter 2 55
Making Measurements
Example 1: Resolving Closely Spaced Signals (with Resolution Bandwidth)
Figure 2-4 100 kHz Bandwidth Resolution
Figure 2-5 300 kHz Bandwidth Resolution
NOTE Spectrum analyzer sweep time is inversely proportional to the square of
the resolution bandwidth, for bandwidths greater than or equal 300 Hz.
So, if the resolution bandwidth is reduced by a factor of ten, the sweep
time is increased by a factor of 100. For fastest measurement times, use
the widest resolution bandwidth that still permits resolution of all
desired signals.
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