FT8 digital mode decoder. Decodes audio from an SSB radio receiver tuned to FT8 frequencies. Uses the device microphone for audio input. Hold your iOS device's microphone close to the radio speaker, or use a Lightning audio adapter connected to the radio's audio line output. Flip the Enable Audio switch to start recording audio into the decoder. Level 1 decode only. Use Apple Files app to see log of all decodes and audio transmitions. Select "Browse", "On My iPhone", "ft8d", then press-and-hold on "ft8d_log" and select "Quick Look" to view your log file. You should also be able to email this file to yourself to export it. Some common FT8 radio frequencies (using SSB/USB mode): band Hz "6m" f0 = 50313000 "10m" f0 = 28074000 "12m" f0 = 24915000 "15m" f0 = 21074000 "17m" f0 = 18100000 "20m" f0 = 14074000 "30m" f0 = 10136000 "40m" f0 = 7074000 "80m" f0 = 3573000 "160m" f0 = 1840000 "630m" f0 = 474200 When running, the Configure screen will show an audio waterfall. You can use the frequency slider to set the output tone frequency. In the Configure settings, you can set your callsign, grid locator, pick a tone frequency, and set or attenuate the volume. The volume must be greater than 0 to Tx or output test signals. Try first selecting a CQ or callsign in the decoded text, and then selecting the output test signal text field. Any pre-set callsign and grid locator will pre-populate the text field. The "note" filed in Configuration setting will be added to the log. You can try playing FT8 output test signals to another FT8 audio decoder. ------ Version 1.0.2 (203) - Fixed some dark mode and UI layout bugs - Changed decoded message display to Upper case - Labeled the transmit frequency slider - Increased font size in iPhone landscape mode Version 1.0.1 - Initial release ------ Copyright notices: iOS Frameworks and Swift libraries Copyright Apple, Inc. pffft Copyright: Copyright (c) 2013 Julien Pommier ( pommier@modartt.com ) Copyright (c) 2020 Hayati Ayguen ( h_ayguen@web.de ) Based on original fortran 77 code from FFTPACKv4 from NETLIB (http://www.netlib.org/fftpack), authored by Dr Paul Swarztrauber of NCAR, in 1985. As confirmed by the NCAR fftpack software curators, the following FFTPACKv5 license applies to FFTPACKv4 sources. My changes are released under the same terms. FFTPACK license: http://www.cisl.ucar.edu/css/software/fftpack5/ftpk.html Copyright (c) 2004 the University Corporation for Atmospheric Research ("UCAR"). All rights reserved. Developed by NCAR's Computational and Information Systems Laboratory, UCAR, www.cisl.ucar.edu. Redistribution and use of the Software in source and binary forms, with or without modification, is permitted provided that the following conditions are met: - Neither the names of NCAR's Computational and Information Systems Laboratory, the University Corporation for Atmospheric Research, nor the names of its sponsors or contributors may be used to endorse or promote products derived from this Software without specific prior written permission. - Redistributions of source code must retain the above copyright notices, this list of conditions, and the disclaimer below. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions, and the disclaimer below in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE. -- ft8_lib Copyright: From: https://github.com/kgoba/ft8_lib MIT License Copyright (c) 2018 Kārlis Goba Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -- Thanks to Robert Morris, AB1HL, whose Python code: https://github.com/rtmrtmrtmrtm/weakmon helped test various parts of ft8_lib. FT8 procotols and decoding/encoding are described here: https://physics.princeton.edu/pulsar/k1jt/FT4_FT8_QEX.pdf by Joe Taylor K1JT, Steve Franke K9AN, and Bill Somerville G4WJS (SK) -- This iOS app is Copyright 2022 HotPaw Productions Copyright 2021,2022 Ronald H Nicholson, Jr All Rights Reserved