Allow either 2 frequencies to be attenuated by 15dB each or 1 frequency to be attenuated by 30dB. Tuning is easiest with a noise generator and a meter with a spectrum function.
Allow either 2 frequencies to be attenuated by 15dB each or 1 frequency to be attenuated by 30dB. Tuning is easiest with a noise generator and a meter with a spectrum function.