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→Overview & Workflow
This section describes the measurement flow of the SiRad Evaluation Kit with its parameters. The measurement parameters as well as the kind and amount of transmitted data can be adapted using the SiRad Evaluation Kit communication protocol described in the following sections.
The signal flow of the radar measurement is shown in Figure 1. Each measurement cycle is initiated by either an internal ‘Self-Trigger’ (int) or an external ‘Manual Trigger’ (ext). Continuous measurements can be triggered with a certain trigger frequency (freq). </br>
Once a trigger is received, the PLL is started that drives a frequency ramp from fBase to (fBase + BW) with the currently set base-frequency (fBase) and the currently set bandwidth (BW). The radar frontend starts its detection in the chosen frequency range.
The AD converter (ADC) begins processing the chosen number of data samples (nSmp) with a certain sample frequency (fSmp). The received data is amplified either by a manually set gain value (once) or by a continuously recalculated automatically acquired gain value (cont.), further named Auto Gain Control (AGC) Mode. If set, a DC cancellation is done.
