the universal modulation coder r&s® smiqb20 is the core of complex digital modulation generation. it derives the analog signals for the i/q modulator of the r&s® smiq from the digital input signals in real time. the internal or external digital input signals are made up of serial or parallel data bit streams, clock signals, signals for burst control and triggering. a prbs generator of different sequence lengths is contained in the modulation coder as an internal signal source.
the modulation coder allows free selection of the format, baseband filtering and symbol rate of digital modulation. the selected parameters can be varied within a wide range.