Functions and Measurements
Measuring a Low-Level Signal
42
3 Set the center frequency, span and reference level:
Press > Center Freq > 300 > MHz
Press > Span > 2 > MHz
Press > Ref Level > 40 > –dBm.
4 Move the desired peak to the center of the display:
Press
Press
> Mkr -> CF
5 Reduce the span to 500 kHz, if necessary re- center the peak:
Press > 500 > kHz
6 Set the attenuation to 20 dB:
Press > Attenuation > 20 > dB
Figure 3-10 A signal closer to the noise level
Note that increasing the attenuation moves the noise floor
closer to the signal level.
7 To allow more of the signal power to pass through the
analyzer, decrease the attenuation to 0 dB.
Frequency
SPAN
Amplitude
Peak
Search
Marker
SPAN
Amplitude
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