Amateur Extra › E4 Amateur Practices › E4D09
E4D09
What is the purpose of the preselector in a communications receiver?
Pick an answer to check it.
Answer: C. To increase the rejection of signals outside the band being received
A preselector is a tuned filter ahead of the receiver that increases rejection of signals outside the band being received. It keeps strong out-of-band signals from causing problems.
Tip: Preselector rejects out-of-band signals.