Common Analysis and Display Functions
R&S
®
FSW
526User Manual 1173.9411.02 ─ 19
Relative scaling is suitable, for example, if masks for bursts are to be defined in zero
span, or if masks for modulated signals are required in the frequency domain.
Thresholds
If the y-axis for the limit line data points uses relative scaling, an additional absolute
threshold can be defined for the limit check. In this case, both the threshold value and
the relative limit line must be exceeded before a violation occurs.
Offsets and Shifting
A configured limit line can easily be moved vertically or horizontally. Two different
methods to do so are available:
●
An offset moves the entire line in the diagram without editing the configured values
or positions of the individual data points. This option is only available if relative
scaling is used.
Thus, a new limit line can be easily generated based upon an existing limit line
which has been shifted horizontally or vertically.
●
Defining a shift width for the values or position of the individual data points
changes the line configuration, thus changing the position of the line in the dia-
gram.
Limit Check Results
A limit check is automatically performed as soon as any of the limit lines is activated
("Visibility" setting). Only the specified "Traces to be Checked" are compared with the
active limit lines. The status of the limit check for each limit line is indicated in the dia-
gram. If a violation occurs, the limit check status is set to "MARG" for a margin viola-
tion, or to"FAIL" for a limit violation.
Display and Limit Lines
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