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Figure 5-8 Failed to Resolve Two Equal Amplitude Signals
d) Set the resolution bandwidth to 100 kHz so that the resolution bandwidth is equal to the frequency
spacing of the two signals:
Press
【
BW
】
, [RBW Auto Man] , and enter 100 [kHz] .
At this point, user can see that the signal peak on the screen has become flat, indicating that there may
be two signals as shown in Figure 5-9.
Figure 5-9 Two Potential Signals
e) Reduce the resolution bandwidth to 10 kHz so that the resolution bandwidth is less than the
frequency spacing of the two signals:
Press
【
BW
】
, [RBW Auto Man], and enter 10 [kHz] .
At this point, user can clearly see two signals appear on the screen, as shown in Figure 5-10. Use the
front panel's rotary knob or [↓] key to reduce the resolution bandwidth, so that user see the two signals
more clearly.
