Amateur Extra › E4 Amateur Practices › E4C01
E4C01
What is an effect of excessive phase noise in an SDR receiver's master clock oscillator?
Pick an answer to check it.
Answer: D. It can combine with strong signals on nearby frequencies to generate interference
Phase noise on the master clock spreads noise around the oscillator frequency. Strong nearby signals mix with that noise and create interference to the signal you want, called reciprocal mixing.
Tip: Noisy clock plus strong neighbor = interference.