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Using Spectrum Analyzer Features
Using limit-line Functions
NOTE
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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