JT9(1)

📦
version 3.0.2 · 7 versions
, in debian bookworm, debian trixie, ubuntu jammy, ubuntu noble, ubuntu questing, ubuntu resolute, ubuntu stonking

💖 JT9(1) — the manual, but make it slay 💖

okay bestie, gather round, because we're talking about jt9 — and yeah it's in section 1 of the manual (User Commands, the little club for user-facing executables 💅).

✨ NAME ✨

jt9 — the one that processes JT4/9/65, FT8 and QRA64 information inside wav files. no cap, it does all of them. 🦋

🌸 SYNOPSIS 🌸

Usage: jt9 [OPTIONS] file1 [file2 ...]

🎀 DESCRIPTION 🎀

so basically it reads data from *.wav files. iconic behavior honestly.

and there's a whole other mode where it pulls the sample data from a shared memory region instead, like:

jt9 -s <key> [-w patience] [-m threads] [-e path] [-a path] [-t path]

in that form, it gets data from shared memory region with key==<key>. yes the key is literally called <key>, she's mysterious like that. 🫶

💅 OPTIONS 💅

okay this is the part where we go one by one, no skipping, because every single one matters. sit pretty bestie 💖

  • -h, --help — display this help message. the classic "help meee" flag 🌈
  • -s KEY, --shmem KEY — use shared memory for sample data 🔥
  • -p MINUTES, --tr-period MINUTES — Tx/Rx period, default MINUTES=1 ⭐
  • -e PATH, --executable-path PATH — location of subordinate executables (KVASD), default PATH="." 🧚
  • -a PATH, --data-path PATH — location of writeable data files, default PATH="." 📁
  • -t PATH, --temp-path PATH — temporary files path, default PATH="." 💜
  • -L HERTZ, --lowest HERTZ — lowest frequency decoded (JT65), default HERTZ=200 📉
  • -H HERTZ, --highest HERTZ — highest frequency decoded, default HERTZ=4007 📈
  • -S HERTZ, --split HERTZ — lowest JT9 frequency decoded, default HERTZ=2700 ✨
  • -f HERTZ, --rx-frequency HERTZ — receive frequency offset, default HERTZ=1500 🎚️
  • -w PATIENCE, --patience PATIENCE — FFTW3 planing patience (0-4), default PATIENCE=1. she's patient but not that patient 🧘
  • -m THREADS, --fft-threads THREADS — number of threads to process large FFTs, default THREADS=1 🧵
  • -6, --jt65 — JT65 mode 👑
  • -9, --jt9 — JT9 mode 🌸
  • -8, --ft8 — FT8 mode 🦋
  • -4, --jt4 — JT4 mode 🍓
  • -q, --qra64 — QRA64 mode 💫
  • -b A, --sub-mode A — sub mode, default SUBMODE=A 🅰️
  • -d DEPTH, --depth DEPTH — JT9 decoding depth (1-3), default DEPTH=1 🕳️
  • -T, --tx-jt9 — Tx mode is JT9 📡
  • -c CALL, --my-call CALL — my callsign.HP 📛
  • -G GRID, --my-grid GRID — my grid locator 🗺️
  • -x CALL, --his-call CALL — their callsign 👀
  • -g GRID, --his-grid GRID — their grid locator 🧭
  • -X FLAGS, --experience-decode FLAGS — experience based decoding flags (1..n), default FLAGS=0 🧠

🔍 SEE ALSO 🔍

the full documentation for jt9 is maintained as a Texinfo manual. if the info and jt9 programs are properly installed at your site, the command

info jt9

should give you access to the complete manual. go read it, it's giving ✨ educated ✨ 😭💖

✍️ AUTHOR ✍️

this manual page was written by Dave Hibberd <d@vehibberd.com> 🫶

and that's the whole vibe bestie — version 1.8.0, February 2018 🌈💜 that's the source and the date, we're done here, go decode something iconic ✨💅

📦 where this page comes from