The Spectrum Application
R&S
®
FPC
69User Manual 1178.4130.02 ─ 07
Frequency domain measurements
In the frequency domain, the R&S FPC analyzes the input signal characteristics over a
certain frequency 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 measurements
In the time domain, the R&S FPC 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 character-
istics of a signal and its behavior over time.
Figure 14-3: Display of a signal in the time domain
The horizontal axis shows the time, the vertical axis shows the signal levels.
You have to select the zero span mode deliberately to measure signal characteristics in
the time domain.
Selecting an advanced measurement function
In addition to these basic measurement functions, you can equip the R&S FPC with
optional advanced measurements.
1. Press the "Meas" key to open the measurement menu.
2. Select one of the menu items.
Selecting "Spectrum" returns to the basic spectrum analysis.
● Measuring the Channel Power of Continuously Modulated Signals....................... 70
● Third Order Intermodulation....................................................................................74
● Power Measurements on TDMA Signals................................................................ 75
● Measuring the Harmonic Distortion.........................................................................78
Measurements and Result Displays
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