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  "path": "/tactical_fsk_modem-an-open-source-mfsk-image-text-modem-for-pc-and-android/",
  "publishedAt": "2026-04-20T05:30:56.000Z",
  "site": "https://www.rtl-sdr.com",
  "tags": [
    "Applications",
    "Digital Signals",
    "Mobile",
    "RTL-SDR",
    "fsk"
  ],
  "textContent": "Thanks to Ibrahim (YD1RUH), who wrote in to share his open-source project Tactical_FSK_Modem, which turns a standard PC or Android device into an audio-based MFSK transceiver for sending images and text over a radio link. Conceptually similar to SSTV or HF FAX, it adds Hamming (7,4) Forward Error Correction that wraps every 4 data bits […]",
  "title": "Tactical_FSK_Modem: An Open Source MFSK Image & Text Modem for PC and Android"
}