---
name: "jt9"
section: "1"
platform: "linux"
package: "wsjtx"
version: "2.7.0+repack-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/jt9"
---

# jt9(1)

processes JT4/9/65, FT8 and QRA64 information in wav files

## NAME

jt9 -  processes JT4/9/65, FT8 and QRA64 information in wav files

## SYNOPSIS

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

## DESCRIPTION

-

  Reads data from \*.wav files.

-

  jt9 **-s** \<key\> \[-w patience\] \[-m threads\] \[-e path\] \[-a path\] \[-t path\] Gets data from shared memory region with key==\<key\>

-

  ## OPTIONS:

- **-h**

  - **--help**

  Display this help message

- **-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

- **-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.

## AUTHOR

This manual page was written by Dave Hibberd \<d@vehibberd.com\>