Rohde & Schwarz R&S FSP Series, Operating Manual

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Operating Manual 1164.4556.12 - 06 4.151
R&S FSP Instrument Functions
Basic Settings
4.6.1.2 Entry and Editing of Limit Lines
A limit line is characterized by
• its name
• the assignment of domain (frequency or time)
• the scaling in absolute or relative times or frequencies
• the vertical unit
• the interpolation
• the vertical scaling
• the vertical threshold (only with relative vertical scaling)
• the margin
• the definition of the limit line as either upper or lower limit.
• the data points for frequency/time and level.
At the time of entry, the R&S FSP immediately checks that all limit lines are in accor-
dance with certain guidelines. These guidelines must be observed if specified oper-
ation is to be guaranteed.
• The frequencies/times for each data point must be entered in ascending order,
however, for any single frequency/time, two data points may be input (vertical
segment of a limit line).
The data points are allocated in order of ascending frequency/time. Gaps are not
allowed. If gaps are desired, two separate limit lines must be defined and then
both enabled.
• The entered frequencies/times need not necessarily be selectable in R&S FSP. A
limit line may also exceed the specified frequency or time domains. The minimum
frequency for a data point is -200 GHz, the maximum frequency is 200 GHz. For
the time domain representation, negative times may also be entered. The valid
range is -1000 s to +1000 s.
• The minimum/maximum value for a limit line is -200 dB to +200 dB for the
logarithmic or 10
-20
to 10
+20
or -99.9% to + 999.9% for the linear amplitude scales.