User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
430User Manual 1178.3370.02 ─ 09
For details on thresholds see "Thresholds" on page 422.
Remote command:
CALCulate<n>:LIMit<li>:LOWer:THReshold on page 907
CALCulate<n>:LIMit<li>:UPPer:THReshold on page 910
Margin
Defines a margin for the limit line. The default setting is 0 dB (i.e. no margin).
For details on margins see "Limits and Margins" on page 422.
Remote command:
CALCulate<n>:LIMit<li>:LOWer:MARGin on page 905
CALCulate<n>:LIMit<li>:UPPer:MARGin on page 908
X-Axis
Describes the horizontal axis on which the data points of the limit line are defined.
Includes the following settings:
●
Unit:
– "Hz": for frequency domain
– "s": for time domain
●
Scaling mode: absolute or relative values
For relative values, the frequencies are referred to the currently set center fre-
quency. In the time domain, the left boundary of the diagram is used as the refer-
ence.
●
Scaling: linear or logarithmic
Remote command:
CALCulate<n>:LIMit<li>:LOWer:MODE on page 905
CALCulate<n>:LIMit<li>:UPPer:MODE on page 909
CALCulate<n>:LIMit<li>:CONTrol:DOMain on page 902
CALCulate<n>:LIMit<li>:CONTrol:SPACing on page 904
Y-Axis
Describes the vertical axis on which the data points of the limit line are defined.
Includes the following settings:
●
Level unit
●
Scaling mode: absolute or relative (dB/%) values
Relative limit values refer to the reference level.
●
Limit type: upper or lower limit; values must stay above the lower limit and below
the upper limit to pass the limit check
Remote command:
CALCulate<n>:LIMit<li>:UNIT on page 908
CALCulate<n>:LIMit<li>:LOWer:SPACing on page 906
CALCulate<n>:LIMit<li>:UPPer:SPACing on page 910
Data Points
Each limit line is defined by a minimum of 2 and a maximum of 200 data points. Each
data point is defined by its position (x-axis) and value (y-value). Data points must be
defined in ascending order. The same position can have two different values.
Display and Limit Lines