Amateur Extra › E2 Operating Procedures › E2E09
E2E09
Which of the following HF digital modes uses variable-length character coding?
Pick an answer to check it.
Answer: D. PSK31
PSK31 uses Varicode, a variable-length code where common letters get shorter codes. RTTY uses fixed-length 5-bit Baudot code.
Tip: PSK31 = Varicode, variable length.