Revision(s) Affected:

AWR2944P, AWR2E44P

Description:

Digital filtering activity can potentially couple to analog circuits leading to spurs in the LO, which may also be seen in the Rx data. Such a spur in the Rx data would be seen at the spur frequency offset around a strong object. This effect is dependent on customer board design, configuration and signal processing and may not occur or affect a given design.

The following are the different spurs that can potentially be observed:

1. Spurs at (2Fs-40) MHz IF frequency for sampling rate +/-0.5Msps around 20 Msps.
2. Spurs at (2Fs-60) MHz IF frequency for sampling rate +/-0.5Msps around 30 Msps.
3. Spurs at (4Fs-140) MHz IF frequency for sampling rate +/-0.3Msps around 35 Msps.
4. Spurs at (4Fs-100) MHz IF frequency for sampling rates in the range 22 to 23.5 Msps and 26.5 to 28 Msps

[Fs=Profile Sampling Rate]

Workaround(s):

The user should check their design for occurrence and if necessary avoid sampling rates in the range mentioned above or use exactly the center of the sampling rate range (so that spur is at 0 Hz).