The high-performance DDS (Direct Digital Synthesizer) is computer-controlled to generate all authorized transmit frequencies between 1.6 and 27.5 MHz plus any receive frequency from 0.1 to 30 MHz in 10 Hz steps. On paired channels, the transmit frequency and the receive frequency are displayed simultaneously. Frequencies and channels are selected either by the rotary control or numeric keys. International calling and distress frequency 2182 kHz is instantly selected by a single touch of the  key.
The FS-1562 provides not only quality voice communication but also GMDSS operation with DSC Terminals DSC-5/5A16/6A and MARITEX/TELEX operation with NBDP Terminal DP-5.
The fully automatic antenna coupler is supplied as standard and matches a whip or wire antenna 7 to 30 meters long. Tuning is achieved in less than 0.5 seconds on channels that have been tuned before and within 2 to 15 seconds on new channels.