Technical data

90 Chapter 5
Spectrum Analyzer
Measuring a Low−Level Signal
Spectrum Analyzer
Press Meas Setup, Avg Number, 10, Enter.
Press
Avg Mode, Exponential.
Press
Trace/Detector, Average.
Step 8. To see the signal more clearly, set the attenuation to 0 dB:
Press
AMPTD Y Scale, Elect Atten, 0, dB.
Figure 5-14 shows 0 dB input attenuation.
Figure 5-14 Measuring a Low-Level Signal Using 0 dB Attenuation
Step 9. Set the attenuation to 20 dB: (as shown in Figure 5-15)
Press
AMPTD Y Scale, Elec Atten, 20, dB.
Note that increasing the attenuation moves the noise floor closer to the
signal level.
Figure 5-15 Measuring a Low-Level Signal