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Amateur Extra Class: 2020–2024
Today
Sections
E1: Commission's Rules
E2: Operating Procedures
E3: Radio Wave Propagation
E4: Amateur Practices
E5: Electrical Principles
E6: Circuit Components
E7: Practical Circuits
E8: Signals and Emissions
E9: Antennas and Transmission Lines
E0: Safety
Quick Index
Practice Test
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Element 4
E2
E2E
E2E10
E2E10:
Which of these digital modes has the narrowest bandwidth?
MFSK16
170 Hz shift, 45-baud RTTY
PSK31
300-baud packet
E2E01
E2E02
E2E03
E2E04
E2E05
E2E06
E2E07
E2E08
E2E09
E2E10
E2E11
E2E12
E2E13