E4: Amateur Practices
Station operation, testing, interference, speech processors, HF mobile
5 Topics
79 Questions in this pool
5 Questions from these topics will be on your exam
E4A: Test Equipment
Test equipment: analog and digital instruments; spectrum and network analyzers, antenna analyzers; oscilloscopes; RF measurements; computer aided measurements.
15 Questions in this topic
1 Question on your exam
E4B: Measurement Techniques
Measurement technique and limitations: instrument accuracy and performance limitations; probes; techniques to minimize errors; measurement of "Q"; instrument calibration; S parameters; vector network analyzers.
17 Questions in this topic
1 Question on your exam
E4C: Receiver Performance Part I
Receiver performance characteristics, phase noise, noise floor, image rejection, MDS, signal-to-noise-ratio; selectivity; effects of SDR receiver non-linearity.
17 Questions in this topic
1 Question on your exam
E4D: Receiver Performance Part II
Receiver performance characteristics: blocking dynamic range; intermodulation and cross-modulation interference; 3rd order intercept; desensitization; preselector.
14 Questions in this topic
1 Question on your exam
E4E: Noise Suppression
Noise suppression: system noise; electrical appliance noise; line noise; locating noise sources; DSP noise reduction; noise blankers; grounding for signals.
16 Questions in this topic
1 Question on your exam