SWRZ092B April 2021 – March 2022 IWR6843AOP
Doppler Spurs Observed for Narrow Chirps
IWR6843AOP ES1.0 and IWR6843AOP ES2.0
There is a non-linearity of the synthesizer when crossing certain frequencies: 60.3-, 60.75-, 61.2-, 61.56-, 62.1-, 62.64-, 63-, and 63.45-GHz.
Implication: There will be a spur in the non-zero Doppler bin when the synthesizer crosses any of these frequencies during a chirp. The exact Doppler bin depends on the slope and ramp timings. The spur will be spread across multiple range bins.
Avoid narrow bandwidth ramps around frequencies with high-spur levels.