BasicB-008-005-002

A filter attenuates frequencies below its cut-off frequency of 60 MHz. What type of filter is it?

C
Answer
Safety
Type
A
Band-pass
B
Low-pass
C
High-pass
D
Notch

Answer Notes

A high-pass filter is designed to let frequencies above a certain cut-off point pass through while blocking (attenuating) frequencies below that point. Since the filter in this question attenuates everything below 60 MHz, it allows everything above 60 MHz to pass. Understanding the naming convention of filters helps eliminate the distractors. A low-pass filter would do the exact opposite, letting frequencies below the cut-off pass. A band-pass filter would attenuate frequencies both above and below a specific range, and a notch filter would block just a specific narrow band.
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What type of filter attenuates RF energy above and below a certain range of frequencies?