The Spectrum Application
FPC1000
109
User Manual 1178.4130.02 ─ 02
6. Select one of the available files and confirm the selection with the "Load" menu
item.
The R&S
FPC1000 displays the limit line. In the diagram area, the limit line is rep-
resented by a red line whose shape depends on the limits
If you have selected a limit line that is not compatible to the current diagram scale,
the R&S
FPC1000 displays a message that it cannot apply the selected limit line.
Using a threshold line
A threshold line is a straight horizontal limit line whose limits are the same over the
complete frequency range.
1. Press the "Lines" key top open the lines menu.
2. Make sure that the "Show Limit Lines" menu item is active (highlighted).
3. Select the "Upper Limit" or the "Lower Limit" menu item.
4. Select the "Set Threshold" menu item.
The R&S
FPC1000 opens an input field to define the limit line threshold.
5. Enter the required threshold.
The R&S
FPC1000 displays the threshold line. The threshold line is represented by
a straight red line.
Hiding a limit line
Hiding a limit line allows you to switch quickly between showing and hiding a limit line
and evaluate a limit check, without
it completely.
When you hide a limit line, a limit check is no longer performed, but the limit line
remains in the memory.
1. Press the "Lines" key top open the lines menu.
2. Select the "Show Limit Line" menu item.
● "Show Limit Line" is highlighted: displays the limit line and evaluates the limit
check.
● "Show Limit Line" is not highlighted: hides the limit line and does not evaluate
the limit check.
Removing limit lines
When you remove a limit line, it is no longer considered in the signal evaluation. You
it again if you want to use the limit line again.
1. Press the "Lines" key top open the lines menu.
2. Select the "Upper Limit" or the "Lower Limit" menu item.
3. Select the "Remove" menu item.
Limit Lines
北京海洋兴业科技股份有限公司（证券代码：839145）
www.hyxyyq.com
