AWR1243BOOST: How small ramp slope can be?

Gennadii Lichkov

Intellectual 930 points

Part Number: AWR1243BOOST

I found ramp slope can be 10 MHz/us from swra553.pdf page 7. Can I set ramp slope less than 10 MHz/us?

Gennadii

over 8 years ago

0 Gennadii Lichkov over 8 years ago

Intellectual 930 points

I found mmWave Sensing Estimator.
Ramp Slope = 0.05 MHz/us for Ramp Slope Parameter = 1

0 Vaibhav Mahimkar over 8 years ago in reply to Gennadii Lichkov

TI__Mastermind 23725 points

Hello Gennadii,

Ramp Slope is one of the configurable parameters of the mmWave Device's chirp and required value is passed as arguments to device over SPI interface.

Bounds of various arguments and API calls are discussed in Radar Interface control document which is part of www.ti.com/.../mmwave-dfp Documents.

Slope of the Chirp is based on rlSetProfileConfig API's freqSlopeConst argument. Each LSB increment of this argument adds 0.05Mhz to the slope of chirp.

Thank you,

Vaibhav

0 Vivek Dham over 8 years ago in reply to Vaibhav Mahimkar

TI__Guru 58035 points

Hello Gennadii,
Yes , theoretically you could set the slope to as low as 0.05Mhz/usec but that would also impact the minimum distance of measurement since the IF frequency would be very low and would fall inside the HPF region. The HPF cut off frequencies can be set to a minimum of 175Khz and 350Khz.

Regards,
Vivek

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AWR1243BOOST: How small ramp slope can be?