Instrument Function > Modulation > Overview of Modulation
Overview of Modulation

Analog modulation is a method used to transmit information of an LF (Low Frequency) signal in accordance with a second signal, typically one of a higher frequency. This is done by varying one or more properties of a high frequency waveform, called the modulation or carrier signal, with the modulating signal that contains the information to be transmitted.

The three key parameters of the modulation signal are the amplitude, phase and frequency. These parameters are modified in accordance with the low frequency signal to obtain the modulated RF signal.

The R&S SMC provides all the various types of modulation, such as:
  • AM (Amplitude Modulation)
  • FM (Frequency Modulation)
  • PhiM (Phase Modulation)
  • PULM (Pulse Modulation)

The basic unit (R&S SMC + frequency option R&S SMC-B10x) enables you to generate modulation signal (sine) without additional equipment options and provides als a standard LF generator.

Settings for the modulation are made in separate modulation menus. These menus can be accessed in the block diagram by way of the "Modulation" function block, or by means of the menu with the same name which is opened using the MENU key.

 


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