HP Cable Box 8591C manual Using Spectrum Analyzer Features

Using Spectrum Analyzer Features

Using limit-line Functions

N O T E

To clear an existing limit-line table, press More 1 of 2 Then press PURGE LIMITS two times.

After pressing PURGE LIMITS the first time, the message If you are sure, press key again to purge data will appear. Pressing PURGE LIMITS a second time purges the limit-line table. @EZ’Fi) turns limit-line testing off (if it is or-d, but does not clear an existing limit-line table.

6.Press Edit Upper to edit or create an upper limit line.

7.The table defaults to fixed parameters, the upper right corner of the table should be labeled FIXED. If it is labeled RELATIVE, press More 1 of 2 Then press LIMITS FIX REL so that FIX is underlined.

LIMITS FIX EEL specifies whether or not the limit line is relative to the cable TV analyzer’s center frequency and reference-level settings.

When time parameters are used, the RELATIVE format only affects the amplitude part of the coordinate pairs. The time parameters are always fixed beginning at the left edge of the graticule.

8.Specify the first limit-line segment to begin at 50 MHz and have an amplitude of - 11 dBmV by using the following key sequence:

SELECT FREQ 50 (MHz) 11 [--dBmV] FLAT

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