HP Cable Box 8591C manual Using Spectrum Analyzer Features

Using Spectrum Analyzer Features

Using limit-line Functions

N O T E

The coordinates for the second point must be entered before the first and limit-line segment is displayed.

9.Enter the second limit-line segment by pressing the following keys: 250 (MHz) 11 [-dBmVj SLOPE

N O T E

Table entries can be edited if you make a mistake. To edit an existing segment, use SELECT SEGMENT to specify the segment. Use SELECT FREQ ,

SELECT AMPLITUD , or SELECT TYPE to specify the column you wish to edit.

10. Specify the third limit-line segment by pressing the following keys:

400 INIHz) 14 C+dBmV) FLAT

You may notice that the end coordinate of segment three is drawn to a point off the top of the cable TV analyzer display. This assures that no trace data beyond the end of the limit line will cause the test to fail.

11. Specify the fourth limit-line segment by pressing the following keys:

600 INIHz) 14 [+dBmV) POINT

Since the limit line in this procedure has only four segments specified, the frequency value of segment four (the last segment) is set to 600 MHz, which is greater than the stop frequency of the display.

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