![]() By decreasing RBW to put the noise floor-at least 10 dB below the signal of interest-and then decreasing VBW to smooth out the remaining noise, these signals are easily measured.Ī: Large RBW does not reveal two distinct tones. RBW and VBW settings are especially important when measuring low level continuous wave (CW) signals in the presence of a large signal, such as spurs from a phased locked loop (PLL) or intermodulation products. As with RBW, lower VBWs increase sweep time. The degree of smoothing is a ratio of the video to resolution bandwidth. Reducing the VBW acts as a low pass filter, smoothing the amplitude variations of both the signal and the noise floor. In addition to RBW, the VBW can be used to reveal signal information that may be hidden by the noise in the system. Lower RBWs provide more detailed sweeps with a lower noise floor, at the cost of a slower sweep speed, while larger RBWs provide faster and less detailed sweeps. ![]() EMC Near-field Probe Set with 40 dB Wideband Amplifierįrequency controls in spectrum analyzer software Resolution and Video Bandwidthĭepending upon the complexity and resolution needed to detect the signals and frequencies of interest, the RBW can be adjusted to illuminate the details of the signal powers at more distinct tones.Directional Coupler - 6 GHz – ZHDC-16-63-S+. ![]()
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