HP Cable Box 8591C manual Using limit-line Functions

Selecting the Limit-Line Table Format

Using Spectrum Analyzer Features

Using limit-line Functions

Press Edit Upper , Edit Lower , Edit Up/Low, or Edit Mid/Delt to edit or create a limit-line table. Each of the edit softkeys represents a different type of limit-line table format. The choice of edit softkey depends upon whether you want an upper limit line only, a lower limit line only, or both an upper and a lower limit line. If you want both lower limit lines, then the characteristics of the limit lines being entered affect your choice of using the upper/lower or mid/delta functions.

The four limit-line table formats are described below:

•The upper limit-line table format is accessed by Edit Upper . With the upper limit-line table format, the coordinates of only the upper limit line are displayed for editing; lower limit-line coordinates are not specified.

Even if lower limit-line values exist or the values had been entered as an upper and lower limit-line table, the upper limit-line values are treated as a separate table from the lower limit-line values. Upper limit-line entries can have independent frequency and amplitude coordinates from lower limit-line table entries.

•The lower limit-line table format is accessed by Edit Lower . With the lower limit-line table format, the coordinates of only the lower limit line are displayed for editing; upper limit-line coordinates are not specified.

Even if upper limit-line values exist or the values had been entered as an upper and lower limit-line table, the lower limit-line values are treated as a separate table from the upper limit-line values. Lower limit-line entries can have independent frequency and amplitude coordinates from upper limit-line table entries.

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