Agilent Technologies 8935 series e6380a manual Using the Spectrum Analyzer Mask

Overview of the Test Set’s Built-In Tools

Using the Spectrum Analyzer

Using the Spectrum Analyzer Mask

The spectrum analyzer mask consists of two adjustable limit lines. They show the upper and lower limits of spectral occupancy. You can choose to set and display either upper or lower limits for the mask, or both. When the mask is turned on, it continuously monitors the signal spectrum with respect to these limits and indicates a failure when the spectrum exceeds these limits. A “Fail” message, along with a beep (if activated), indicates a failure. “Pass” is displayed if the signal remains within the limits of the mask.

Displaying the Spectrum Analyzer Mask

1.On the SPEC ANL screen, set the Controls field to MASK. (See “Selecting the Spectrum Analyzer’s Controls Menus” on page 112 for instructions.)

2.Set the Display field to show the mask on the screen, and to indicate which limits you want to measure against.

•Upper Only

•Lower Only

•Both

Setting this field to Off turns off the mask and the pass/fail indicator.

3.Set the Mask Type field to the type of mask you want to measure against.

•Fix sets the mask to absolute limits defined in the #Pts, EditPoint, Lvl, and Freq fields. When using fixed limits a change in the center frequency or level may cause the mask to move beyond the viewable area of the screen.

•Rel sets the mask relative to the center frequency and reference level defined in the Center Freq and Ref Lvl fields on the spectrum analyzer’s Main controls menu.

You can define two masks, one fixed and one relative and switch between the two using this field.

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