On the Icom IC-7300, SSB is generated using a digital phase-shift network (PSN) modulation system rather than a traditional analog filter-type SSB modulator.

What this means in practice

  • The radio creates single sideband by digitally generating two audio signals 90 degrees out of phase (a phase-shift network), then combining them so that one sideband and the carrier are effectively canceled.
  • This is all done in the IC-7300’s DSP chain, since it is a direct-sampling SDR; the SSB signal is formed in the digital domain and then converted to RF.

How it’s labeled in the specs

  • In Icom’s own specifications, the IC-7300 transmitter section lists:
    • “Modulation system – SSB: Digital P.S.N. modulation.”
  • More generically, this is still standard SSB voice, just implemented with a digital PSN method instead of classic analog crystal or mechanical filters.

Takeaway for operating

  • From an operator standpoint, you are simply using normal SSB (LSB/USB) modes; there’s nothing special you need to set for the modulation type.
  • The “digital PSN” description just tells you the internal architecture: a modern DSP-based SSB modulator rather than an older analog design.

TL;DR: The IC-7300’s SSB is standard single sideband voice, implemented internally as digital phase-shift network (PSN) modulation in the DSP signal chain.

Information gathered from public forums or data available on the internet and portrayed here.