IWR1642: Mismatch of TX start time location in Radar studio and application note swra553.pdf

Chris Meng

Part Number: IWR1642

Hi,

In application note "Programming Chirp Parameters in TI Radar Devices" (www.ti.com/.../swra553.pdf), customer found below Typical FMCW Chirp. You will find that TX start time is inside the adc start time.

But in Radar studio, you will find TX start time is inside Idle time.

Would you pls kindly advise which one is correct?

over 6 years ago

0 Vivek Dham over 6 years ago

TI__Guru 58035 points

Hello Chris,
We allow both positive and negative TX start times. If you use a positive TX start time then the transmitter will turn ON after the start of the ramp (by the amount of time provided as input). If you use a negative TX start time then the transmitter would get turned ON prior to the ramp start. The two figures you mentioned above indicate these two scenarios.

Regards,
Vivek

0 Vivek Dham over 6 years ago in reply to Vivek Dham

TI__Guru 58035 points

Hello Chris,
Does this help clarify your doubt?

Regards,
Vivek

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IWR1642: Mismatch of TX start time location in Radar studio and application note swra553.pdf