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Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
As an example, assume you have a frequency limit line.
If the limit line is specified as fixed, entering a limit-line
segment with a frequency coordinate of 300 MHz displays
the limit-line segment at 300 MHz. If the same limit-line
table is specified as relative, it is displayed relative to the
analyzer center frequency and reference level. If the center
frequency is at 1.2
GHz,
a relative limit-line segment with a
frequency coordinate of 300 MHz will display the limit-line
segment at 1.5
GHz.
If the amplitude component of the
relative limit-line segment is
-
10
dB,
then
-
10
dB
is added
to the reference level value to obtain the amplitude of the
given component (reference level offset included).
RELATIVE is displayed in the limit-line table when the
limit-line type is relative; FIXED is displayed when limit-line
type is fixed.
A limit line entered as fixed may be changed to relative,
and one entered as relative may be changed to fixed.
When changing between fixed and relative limit-lines, the
frequency and amplitude values in the limit-line table
change so that the limit line remains in the same position
for the current frequency and amplitude settings of the
analyzer. If a time and amplitude limit line is used, the
amplitude values change but the time values remain the
same.
Front-Panel Key Access
(j-1
6-84