Modulation Real-Time Measurement Display

Number of configurations, like windows display, history, visualization profile and Graph Configuration for modulated signal graphs are similar to 1-Tone Real-Time Measurement Display. If no Receiver measurements are selected, IQSTAR will proceed with the measurement of power and IV characteristics and will only display Powers, Gain, IV and efficiency, as done in 1-Tone Measurements. Depending on the selected Receiver measurements, the graph data and graph types are updated in order to display appropriate data or traces.

Adjacent Channel Power Ratio (ACPR)

Regarding the definition of the ACP template, IQSTAR displays ACPR (lower/upper) for each adjacent channels described.



Note: The name of each ACPR will respect the numbering defined in the offset settings of Adjacent Channel Power Ratio (ACPR).

Complementary, cumulative Density Function (CCDF)

CCDF trace needs a special type of graph to be displayed. In order to see the CCDF during the measurements select Trace Graph Mode then CCDF in theGraph Configuration :

Note: Grey CCDF trace corresponds to the CCDF recorded during the first measurement, while the blue CCDF trace corresponds to the current CCDF trace. Moving the output power and/or the frequency slider, it is possible to analyze the CCDF evolution (expansion or compression) in function of the average output power or frequency.


Regarding the definition of the PAPR, IQSTAR displays PAPR data through the basic X/Y graph.

Error Vector Magnitude (EVM data).

Selecting EVM data through the basic X/Y graph, IQSTAR is able to display all EVM information:
  • EVM Reference: RMS and peak values
  • Modulation Error Rate (MER): RMS and peak values
  • Magnitude Error: RMS and peak values
  • Phase Error: RMS and peak values


Spectrum

If 'Spectrum' is configured, IQSTAR will display the baseband signal. Notice that Spectrum is also a special type of graph, select Trace Graph Mode then Spectrum in theGraph Configuration :



Moreover if 'Spectrum' measurements are associate with 'Adjacent Channel Power' measurements, IQSTAR will display the Spectrum and superimpose the ACPR masks.