Revision(s) Affected:

IWR1443 ES1.0, ES2.0 and ES3.0

Description:

Turning OFF and ON front-end modules can cause on-board supply ringing and slow the settling of the power supply. This supply ringing can manifest as a spur (~130KHz) in the FMCW synthesizer output spectrum.

Workaround(s):

Workaround #1:

Disable inter-chirp duty cycling of the RX.

or

Workaround #2:

Design the power supply to damp out the ringing on the rails to the device.