Noise blanker – removes impulse interference. Noise blanker parameters:
· Threshold NB 1, 2 – filter trigger threshold. Set the required filter 1, 2 trigger thresholds,
depends on the interference level.
·NB has a threshold, set it to cut pulse noise if it surpasses the threshold. As a rule, pulse
noise is a high-amplitude and short in time signal, with an amplitude much higher than useful
signal. If it will be cut from the mix of signals the useful signal won't be corrupted. For correct
operation, the threshold level should be adjusted higher than useful signals. In this case, NB
will work perfectly. If the threshold will have the same level as useful signals or lower, the NB
will try to cut useful signals and you'll hear and see distorted signals in phones and spectrum
scope. If noises have white spectrum (not pulse) with low level (lower than useful signals), the
NB cannot be used in this case, use NR.