Note: NBW represents the number of samples that define the width of a spike. Consequently, when you work at a lower sample rate, such as that used for a 50 KHz receive window, a single sample represents a different amount of time than it does when running 250 KHz wide. For this reason, with the same noise source, you'll find that the most effective NBW setting differs between the various sample rates. So if you change your sample rate, remember to revisit this noise blanker setting.

Caution: With the noise blanker in the NBL state, the more impulse information removed from the RF signal, the less precise the resulting waveform is in representing the signals in the band. There are two consequences to this: First, that the visible RF signal and waterfall will become distorted by the signal blanking, and second, that the demodulated signal will also become less precise but free of the noise itself. A second press on the button will result in NBL, and in this state, the RF display processing will not be affected by the noise blanker. This removes the potential for distortion, however in higher noise environments, the visible noise may present more of a problem than the distortion. Use the mode that is best for your purposes. Noise blanking is applied equally to the demodulated signal in either mode.

With strong noise blanker settings in NBL mode, you can expect to see signals in one portion of the display cause visual interference with the display of all other signals. This is normal, a consequence of information having been removed from the RF signal by the noise blanker. Try NBL mode and see if the presence of noise in the display is less annoying than blanker distortion is. Using SNF can ameliorate visual noise as well while still not presenting cross-signal distortion in NBL mode.