[116] RADIO: Device spurious emission during transmit is higher than expected

This anomaly applies to IC Rev. Engineering A, build codes QKAA-AB0.

Domains

Network

Symptoms

Spurious emission occurs during transmission on 2.4 GHz carrier ± n*64 MHz frequencies, where n is 1, 2, and 3.

Conditions

Radio is transmitting.

Consequences

Device has spurious emission during transmission on 2.4 GHz carrier ± n*64 MHz frequencies, where n is 1, 2, and 3. Spurious emissions are unwanted frequency components in transmitted signals that may exceed ETSI, FCC, or other radio regulation limits.

Workaround

Connect an X7R type decoupling capacitor of 820 pF, between pin AG31 and VSS.