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Chapter 1 35
Making Basic Measurements
Measuring Low Level Signals
10.Reduce the span to 1 MHz. Press SPAN, Span, and then use the
step-down key (↓) until the span is set to 1 MHz. See Figure 1-26.
Figure 1-26 Low-Level Signal
11. Press AMPLITUDE, Attenuation. Press the step-up key (↑) to select
20 dB attenuation. Increasing the attenuation moves the noise floor
closer to the signal.
A # mark appears next to the Atten annotation at the top of the
display, indicating the attenuation is no longer coupled to other
analyzer settings.
Figure 1-27 Using 20 dB Attenuation