User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
438User Manual 1178.3370.02 ─ 03
The remote commands required to define these settings are described in Chap-
ter 8.8.8, "Working with Markers", on page 708.
● Precise Frequency (Signal Count) Marker............................................................438
● Measuring Noise Density (Noise Meas Marker)....................................................439
● Phase Noise Measurement Marker.......................................................................442
● Measuring Characteristic Bandwidths (n dB Down Marker)..................................445
● Fixed Reference Marker........................................................................................447
● Measuring the Power in a Channel (Band Power Marker)....................................448
● Demodulating Marker Values and Providing Audio Output (Marker Demodulation)
.............................................................................................................................. 451
● Marker Peak List................................................................................................... 453
● Deactivating All Marker Functions.........................................................................456
7.9.4.1 Precise Frequency (Signal Count) Marker
Access: "Overview" > "Analysis" > "Marker Functions" > "Select Marker Function" >
"Signal Count" > "Signal Count Config"
Or: MKR > "Select Marker Function" > "Signal Count" > "Signal Count Config"
A normal marker determines the position of the point on the trace and indicates the sig-
nal frequency at this position. The trace, however, contains only a limited number of
points. Depending on the selected span, each trace point can contain many measure-
ment values. Thus, the frequency resolution of each trace point is limited.
(See also Chapter 7.6.1.8, "How Much Data is Measured: Sweep Points and Sweep
Count", on page 395).
Frequency resolution is further restricted by the RBW and sweep time settings.
To determine the frequency of a signal point accurately without changing the sweep
settings, the R&S FPL1000 is equipped with a signal counter. The signal counter sets
Marker Usage