Common Analysis and Display Functions
R&S
®
FSW
533User Manual 1173.9411.02 ─ 43
To determine the frequency of a signal point accurately without changing the sweep
settings, the R&S FSW is equipped with a signal counter. The signal counter sets the
RF to the current marker position, then counts the zero crossings of the IF (thus the
term signal counter) and derives the precise frequency value.
Signal counting can be performed explicitly at the current marker position ("Signal
Count" marker function), or implicitly by the R&S FSW for certain functions.
Signal counting is only possible while the instrument is not sweeping. Thus, to perform
a signal count for a marker, the sweep is stopped at the marker position. The fre-
quency is determined with the desired resolution and then the sweep is allowed to con-
tinue.
A measurement example is described in Chapter 7.1.3.2, "Measuring the Signal Fre-
quency Using the Signal Counter", on page 137.
Signal counters are not available for measurements on I/Q-based data.
Remote commands:
"Example: Performing a Highly Accurate Frequency Measurement Using the Signal
Count Marker" on page 1208
CALCulate<n>:MARKer<m>:COUNt on page 1196
CALCulate<n>:MARKer<m>:COUNt:RESolution on page 1197
Signal Count Marker State..........................................................................................533
Resolution................................................................................................................... 533
Signal Count Marker State
Activates or deactivates the special signal count marker function.
When activated, the sweep stops at the reference marker until the signal counter has
delivered a result.
Remote command:
CALCulate<n>:MARKer<m>:COUNt on page 1196
CALCulate<n>:MARKer<m>:COUNt:FREQuency? on page 1196
Resolution
Defines the resolution with which the signal is analyzed around the reference marker 1.
Remote command:
CALCulate<n>:MARKer<m>:COUNt:RESolution on page 1197
Marker Usage
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