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User Manual

ManualsBrandsRohde & Schwarz ManualsSignal Generators & Spectrum AnalysersSpectrum Analyser Portable, 3GHz, 50Ohm
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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
364User Manual 1178.3370.02 ─ 09
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
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 FPL1000 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 "Measuring the Signal Frequency Using the
Signal Counter" on page 101.
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 897
CALCulate<n>:MARKer<m>:COUNt on page 885
CALCulate<n>:MARKer<m>:COUNt:RESolution on page 886
Signal Count Marker State..........................................................................................364
Resolution................................................................................................................... 364
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 885
CALCulate<n>:MARKer<m>:COUNt:FREQuency? on page 885
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 886
Marker Usage