R&S FSH
Spectrum Analyzer Mode
Performing Spectrum Measurements
Operating Manual 1173.6275.12 - 30
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Spectrum Analyzer Mode
The default operating mode of the R&S FSH is the spectrum analyzer. The spectrum
analyzer provides the functionality to perform measurements in the frequency domain,
e.g. to identify the power of signals.
3.1 Performing Spectrum Measurements
In addition to basic spectrum measurements, the R&S FSH provides several specific
measurements. These measurements, also in combination with one of the available
accessories, allow you to perform advanced and more complex measurement tasks.
3.1.1 Measuring Basic Signal Characteristics
Basic spectrum measurements determine the spectrum of a signal in the frequency
domain or keep track of a signal in the time domain. They provide a basic overview of
the input signal characteristics.
Frequency domain
In the frequency domain, the R&S FSH analyzes the input signal characteristics over a
particular span. You can use it, for example, to obtain basic measurement results like
peak levels and the shape of the spectrum.
The horizontal axis shows the frequency, the vertical axis shows the signal levels.
The measurement in the frequency domain is the default measurement mode.
Time domain
In the time domain, the R&S FSH analyzes the characteristics of a signal at a particular
frequency over time. The span during time domain measurements is 0 (zero span
mode). You can use time domain measurements, for example to monitor the
characteristics of a signal.
The horizontal axis shows the time, the vertical axis shows the signal levels.
To perform a time domain measurement, you have to set the span to zero manually.
