R3131 Spectrum Analyzer Operation Manual
2.2 Basic Operation
2-43Apr 10/98
Setting the measurement conditions
This changes the analyzer settings so that the input signal is displayed more clearly.
5. Press FREQ, 2, 0, 0 and MHz.
A center frequency of 200 MHz is set.
6. Press SPAN, 1, 0, 0 and MHz.
A frequency span of 100 MHz is set.
7. Press LEVEL, 4, 0 and MHz(-dBm).
The reference level is set to -40 dBm.
Figure 2-36 Screen Display Prior to Changing the RBW
Changing the RBW
The RBW default setting is 1 MHz. The noise level can be reduced by decreasing this
value.
8. Press BW, RBW AUTO/MNL, 1, 0, 0 and kHz.
The RBW mode is changed to manual, and the resolution bandwidth is set to 100
kHz. As a result, the dynamic range has increased and this has reduced the noise
level by approximately 10 dB.
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