Methods, systems, and devices for wireless communications are described. A device, which may be otherwise known as user equipment (UE), may support spurious emission attenuation. A device may determine, based on a first frequency scan on a radio frequency (RF) spectrum band, that a signal strength of a signal at a frequency of the RF spectrum band satisfies a threshold. The device may perform, based on the first frequency scan on the RF spectrum band, a second frequency scan on the RF spectrum band to determine whether the signal strength of the signal at the frequency of the RF spectrum band satisfies the threshold during the second frequency scan. Subsequently, the device may determine that the signal is a spurious emission at the frequency based on the signal strength of the signal, and configure a notch filter for mitigating the spurious emission at the frequency.