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

To successfully set up an MF/HF transceiver for a TELEX call to a coast station, the operator must engage the appropriate modes that align with the operational requirements of the equipment being used. Selecting the F1B mode indicates the use of frequency-shift keying (FSK) for the teleprinter operations, which is essential for TELEX communication. J2B mode, on the other hand, is used for amplitude modulation of the two-sideband signal, which could also be utilized depending on what the specific manufacturer has designed into their equipment.

While J3E mode might also be relevant for certain types of communications, especially in high-frequency transmissions, it is not exclusively specified for standard TELEX functions. Therefore, the choice that focuses specifically on F1B or J2B modes directly ties to the requirements and operational capabilities for effective TELEX communications across the established coast station facilities. The flexibility to operate between the two modes based on the equipment manufacturer ensures compatibility and proper functionality.

Other options may present variations of mode selections, but they do not specifically emphasize the proper operational methodologies necessary for effective TELEX calling to a coast station using the transceiver.