Rohde & Schwarz FPL1000 Series, User Manual

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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
457 User Manual 1178.3370.02 ─ 03
7.9.5 How to Work With Markers
The following step-by-step instructions demonstrate in detail how to work with markers.
● How to Analyze a Signal Point in Detail ................................................................457
● How to Use a Fixed Reference Marker .................................................................457
7.9.5.1 How to Analyze a Signal Point in Detail
When you need to analyze a characteristic point in the signal in more detail, the follow-
ing procedure can be helpful:
1. Perform a peak search to determine the characteristic point roughly by pressing
the PEAK SEARCH key.
2. If the required signal point is not the maximum, continue the peak search to one of
the subsequent maxima or minima:
a) Press the MKR -> key.
b) Select the "Next Peak" or "Next Min" key.
c) If necessary, change the search settings by selecting the "Search Config" soft-
key.
3. Center the display around the determined signal point by setting the marker value
to the center frequency. Select the "Center = Mkr Freq" softkey.
4. Determine the precise frequency of the signal point:
a) Select the "Select Marker Function" softkey.
b) Select the "Signal Count" button.
c) Select the "Signal Count Resolution" softkey.
d) Select the resolution depending on how precise the result needs to be.
7.9.5.2 How to Use a Fixed Reference Marker
By default, delta markers refer to marker 1. However, they can also refer to a fixed ref-
erence marker.
How to Define and Move a Fixed Reference Marker
1. To display a fixed reference marker, do one of the following:
● Press the MKR FUNC key, then select the "Reference Fixed" marker function.
● In the "Marker" dialog box, in the "Reference Fixed" area of the "Marker Config"
tab, set the "State" to "On" .
A vertical and a horizontal red display line are displayed, marked as "FXD" . The
normal marker 1 is activated and set to the peak value of the trace assigned to
marker 1, and a delta marker to the next peak. The fixed reference marker is set to
the position of marker 1 at the peak value.
2. To move the fixed reference marker, do one of the following:
Marker Usage