Measurement
365
Expanding Dynamic Range
• Overview
• Lowering Receiver Noise Floor
Other topics about Optimizing Measurement
Overview
The dynamic range is the finite difference between the maximum input
power level and the minimum measurement power level (noise floor) of
the analyzer. In evaluating a characteristic accompanied by a large change
in the amplitude (the pass band and stop band of a filter, for example), it
is important to increase the dynamic range.
Lowering Receiver Noise Floor
Lowering the noise floor of the receiver enables you to expand the dynamic
range. The following methods can be used to lower the receiver noise floor.
• Narrowing the IF bandwidth
• Turning on Sweep Averaging
Narrowing the IF bandwidth
Narrowing the receiver IF bandwidth enables you to reduce the effect of
random noise on measurements. Narrowing the IF bandwidth to 1/10 the
original bandwidth causes the receiver noise floor to decrease by 10 dB.
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