Tektronix DPO5000/B, User Manual

Page: 156 / 222

Analyzing waveforms
MSO5000B and DPO5000B Series
6. View time-domain and frequency-domain
waveforms simultaneously.
Use
Gating to select only a part of
the time-domain waveform for spectral
analysis. (See page 121,
Gating .)
Quick tips
Sources for spectral math waveforms must be channel or other math waveforms.
Use short record lengths for faster instrument response.
Use long record lengths to lower the noise relative to the signal and increase the frequency resolution.
Different window functions produce different fi lter response shapes in the spectrum and result in different resolution
bandwidths. See the online help for more information.
The resolution bandwidth (RBW) directly controls the gate width. Therefore, the time domain gate markers move
as you adjust the control.
You can display the linear magnitude of the real data or the imaginary data in the spectrum. This is useful if you process
the spectrum off line and transform it back into a time domain trace.
134 MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series User Manual