E4C - Amateur Practices

What is an effect of excessive phase noise in an SDR receiver’s master clock oscillator?

Which of the following receiver circuits can be effective in eliminating interference from strong out-of-band signals?

What is the term for the suppression in an FM receiver of one signal by another stronger signal on the same frequency?

What is the noise figure of a receiver?

What does a receiver noise floor of -174 dBm represent?

How much does increasing a receiver’s bandwidth from 50 Hz to 1,000 Hz increase the receiver’s noise floor?

What does the MDS of a receiver represent?

An SDR receiver is overloaded when input signals exceed what level?

Which of the following choices is a good reason for selecting a high IF for a superheterodyne HF or VHF communications receiver?

What is an advantage of having a variety of receiver bandwidths from which to select?

Why does input attenuation reduce receiver overload on the lower frequency HF bands with little or no impact on signal-to-noise ratio?

How does a narrow-band roofing filter affect receiver performance?

What is reciprocal mixing?

What is the purpose of the receiver IF Shift control?