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Mid/Delt
Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer
Mode Functions
allows you to view or edit the upper and lower limit-line
tables simultaneously. These tables are edited by entering
a middle amplitude value and an amplitude deviation. Up
to 20 entries are allowed for the upper and lower limit-line
tables. Like the upper and lower limit-line table format,
the mid/delta limit-line table format provides a means of
specifying the upper and lower limit lines at the same time.
Unlike the upper and lower table format, the amplitude
values are specified as a middle amplitude value with a delta
(the upper and lower limit lines are drawn an equal positive
and negative distance from the middle amplitude).
With the mid/delta format the frequency (or time), and the
middle amplitude plus the delta comprise the upper limit
line; the frequency (or time), and the middle amplitude
minus the delta comprise the lower limit line. The difference
between the mid/delta and the upper/lower format is the
way the amplitude values are entered; the frequency (tune)
coordinate begins a segment regardless of the format chosen.
The mid/delta format can be used if the upper and lower
limit lines are symmetrical with respect to the amplitude
axis. An upper and lower amplitude component are specified
for every frequency (or tune) component.
Front-Panel Key Access
(DISPLAYI)
6-61