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Measuring a Low−Level Signal
Decreasing the Resolution Bandwidth
RBW Selections You can use the step keys to change the RBW in a 1−3−10 sequence.
All the Signal Analyzer RBWs are digital and have a selectivity ratio of 4.1:1.
Choosing the next lower RBW (in a 1−3−10 sequence) for better sensitivity
increases the sweep time by about 10:1 for swept measurements, and about 3:1 for
FFT measurements (within the limits of RBW). Using the knob or keypad, you can
select RBWs from 1 Hz to 3 MHz in approximately 10% increments, plus 4, 5, 6 and
8 MHz. This enables you to make the trade off between sweep time and sensitivity
with finer resolution.
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