|Model 12-14C allows
the "notch" (or peak attenuation) of at least - 68 dB to be varied by 1120 KHz
in eight user-selected steps. Eight DIP switches allow the attenuation notch to be closely
turned to the known center frequency of the identified unwanted RF emission.
Model 12-15D provides
superior broadband attenuation of -90 dB at 1000 KHz in cases where the center frequency
of the RF emissions cannot be identified or there are multiple RF sources. This UL listed
product eliminates the need for expensive and time-consuming signal tracking equipment.
Audible RF noise may also be created within
the telephone set. Circuits and certain components within a telephone set can act as both
antenna and receiver (demodular) for RF emissions from a nearby source. Maximum
performance of any RFI suppression network can not be assured in such situations.