Agilent Technologies E4406A manual Changing the Display, Changing the Linear Spectrum Display

Making Measurements

Making the Spectrum (Frequency Domain) Measurement

Changing the Display

The Span key under the Meas Setup menu controls the horizontal span of the Spectrum Linear window. If the SPAN X Scale key is pressed, this Span key is activated, while the AMPLITUDE Y Scale key allows you to access the menus to modify the vertical parameters depending on the selected windows.

Changing the Linear Spectrum Display

If the Linear Spectrum window is active in the Spectrum Linear view, the SPAN X Scale and AMPLITUDE Y Scale keys access the menus to modify the following parameters:

•With the SPAN X Scale key:

—Span - Allows you to modify the frequency span. The range is 10.000 Hz to 10.000 MHz with 1 Hz resolution, depending on the Res BW setting. Changing the span causes the resolution bandwidth to change automatically, and will affect data acquisition time.

•With the AMPLITUDE Y Scale key:

—Scale/Div - Allows you to set the vertical scale by changing an amplitude value per division. The range is 1.00 nV to 20.00 V per division. The default setting is 100.0 mV. However, since the Scale Coupling default is On, this value is automatically determined by the measurement results. To manually set this value Scale Coupling must be Off.

—Ref Value - Allows you to set the reference value ranging from

−250.00 to 250.00 V. The default setting is 0.00 V. However, since the Scale Coupling default is On, this value is automatically determined by the measurement results. To manually set this value Scale Coupling must be Off.

—Ref Position - Allows you to set the reference position to either Top, Ctr (center) or Bot (bottom). The default setting is Ctr.

—Scale Coupling - Allows you to toggle the scale coupling function between On and Off. The default setting is On. Upon pressing the Restart front-panel key or Restart softkey under the Meas Control menu, this function automatically determines the scale per division and reference values based on the measurement results. To manually set either Scale/Div or Ref Value values, Scale Coupling must be Off.

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