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R3267 Series Spectrum Analyzer Operation Manual (Vol.1)
2.2.7 Dynamic Range
2-37
7.
Press LEVEL, 4, 0 and MHz(-dBm).
The reference level is set to -40 dBm.
Figure 2-42 Trace Prior to Changing the RBW
Changing the RBW
The RBW is set to 1 MHz according to the current center frequency and frequency
span. The noise can be reduced by making this value smaller.
8.
Press COUPLE, RBW AUTO/MNL(MNL), 1, 0, 0 and kHz.
An RBW of 100 kHz is set. Check that the noise level is reduced by 10 dB and
the dynamic range is widened.
Figure 2-43 Trace After Changing the RBW
Changing the VBW
The noise width can be further reduced by setting the VBW to 1/10 of the RBW.