Hi experts，
In the configuration chirp profile parameters, there are several questions confused me:
Q1:What is the minimum value of the parameters:Idle Time & ADC Start Time?
Q2:What is the maximum value of the parameter:ADC Sample Rate in case of complex 1x?
Best Regards!
NanShan
Hello NanShan,
The app-note "Programming Chirp Parameters in TI Radar Device" provides you with these information.
A1:
The Idle Time is function of the ramp down bandwidth(synthesizer ramp down settling time) . So it is dependent on the ramp bandwidth. The Idle time can be typically 2us for ramp bandwidth of <1GHz and about 7us for ramp bandwidth of >3GHz.
ADC start time does not have a hard requirement for the correct chirp functionality.There are certain trade-off between this value and quality of the beginning of the Chirp which in turn is dependent on ramp slope, HPF corner frequencies .
A2:
Please refer to the AWR1243 datasheet, we have put the max sampling rate in case of both the real(+ complex2x) and complex(1x) case.
You can refer to the "Ramp timing calculator" that is available in the RadarStudio (part of MMWAVE-DFP) to arrive at the right timing param value.
Thanks,
Raghu
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