Tektronix MSO56 [172/628] The spectrum view user interface

9. To change the Span, use a horizontal pinch or expand motion on the touchscreen, or use the front-panel Horizontal Scale

knob.

NOTE. Setting Span sets the same span value across all spectrum traces, regardless of the center frequency. For example,

the trace 1 center frequency is set to 40 MHz, and span is set to 20 MHz, so trace 1 shows frequencies from 30 MHz to

50 MHz. If you add a spectrum trace for channel 2 with a center frequency of 60 MHz, trace 2 uses the same 20 MHz to

show frequencies from 50 MHz to 70 MHz.

10. To change the vertical Scale, use a vertical pinch or expand motion on the touchscreen, or use the front-panel Vertical

Scale knob.

11. To add peak markers to the trace, double-tap in a spectrum slice to open the Spectrum View menu and tap the Markers

panel. Use the controls to set the number of markers to display, the threshold level at which to detect peaks, and the

excursion range required by the peaks. See Spectrum View window configuration menu on page 422

The Spectrum View user interface

A spectrum trace shows the magnitudes of the frequency components that make up the time-domain waveform. Use spectrum

traces in the Spectrum View to view noise, distortion, and crosstalk information of time-domain signals.

NOTE. Spectrum View is standard in 5/6 Series MSO instruments. Spectrum View is an option in 4 Series MSO instruments.

The Spectrum View elements

Predominant frequencies (with greater magnitude) are shown as peaks in the view. The vertical graticule represents the signal

magnitude, and the horizontal axis represents frequency, with the starting (lowest) frequency at the left side of the graticule.

Each spectrum trace can display up to four spectrum trace types for each source channel: Normal, Max Hold, Min Hold, and

Average. You can turn each of these traces on and off independently. You can display all or some of them simultaneously.

Using Spectrum View

142 4/5/6 Series MSO Help