To set-up the MF/HF Transceiver for a TELEX call to a coast station, the operator must:

Correct Answer: Option B — Select F1B mode or J2B mode, depending on the equipment manufacturer.

TELEX (NBDP) communications require specific digital emission modes. F1B (frequency shift keying) or J2B (phase shift keying) are the standard modes used for data transmission over MF/HF. These modes are required to interface with the SITOR (Simplex Telex Over Radio) protocols used by coast stations for automated message handling.