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For Android: 6.0 and up	Guide: FT8RX - FT8 Decoder cheats tutorial
When updated: 2021-03-03	Star Rating: 0
Name: FT8RX - FT8 Decoder hack for android	Extension: Apk
Author: Sascha Wittkowski	File Name: com.swi.ft8dx
Current Version: 1.0.1	User Rating: Everyone
Downloads: 10-27	Version: mod, apk, unlock
System: Android	Type: Education

 

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About the application:

Decode FT8 on your phone! FT8RX is a FT8 decoder for Ham Radio that doesn't require a PC or any another device to function. It records audio input and tries to search and decode FT8 signals every 15 seconds. An internet connection is not needed (except if you wish to synchronize to Internet time via NTP, of course). Instructions Timing must be correct in order for FT8 to work. Even though smartphones usually synchronize their clock automatically with the Internet, it still is a tiny bit off sometimes. For this reason FT8RX has a delay functionality, an internal clock one should say, which can be used to further tune the time shift. You don't need to do anything. Begin the apk and it will begin looking for FT8 signals. You can check that the apk is receiving audio by looking at the sound meter next to the tiny microphone icon at the top or simply by looking at the waterfall diagram to the bottom. When the "Decoding" text at the bottom right lights up the apk is processing the most latest 15 seconds of audio data. Results are displayed as quickly as possible. If nothing should be decoded the decoding light turns off and nothing gets displayed. In case your phone clock is off by a lot of seconds, test the "NTP SYNC" button. It will connect to a NTP server and adjust FT8RX' internal clock drift. The NTP server has proven to be somewhat unreliable, you might have to test a few times until it is successful. You can adjust time further to incoming signals by pressing the "-0.1s" and "+0.1s" buttons. If you see that all signals have a positive time drift, you could consider decreasing time drift by pressing "-0.1s" and vice versa. If you wish to restart FT8RX' clock simply press the "RESET Δt" button. You can see the current offset to your smartphones clock in the lower left corner. If it is 0, FT8RX is basically using your smartphones' clock. Implementation Notes The apk was developed using the FT8 specification as described by Joe Taylor in an article for the ARRL QEX magazine. Legally, I'm not allowed to check the WSJT-X code for implementation info. Therefore, some features are missing in this apk. Please consider the following things before buying this software: 1. The most annoying thing (at least for me) is the absence of the 2500hz SNR dB measurement. I tried to receive the same results as WSJT-X and gave up on it eventually. Of course, calculating S/N was possible but yielded a various value. To avoid confusion and false reports I left it out entirely. 2. Apparently, lots of very intelligent tricks. WSJT-X is simply the better decoder. You'll detect a lot less signals with FT8RX. So, even though it should happen that FT8RX found a signal which WSJT-X did not, my tests showed a performance of about 50% (compared to WSJT-X). 3. Some (not so common) FT8 modes are not (yet) supported: - Kind 0.1 DXpedition - Kind 0.3 Field Day - Kind 0.4 Field Day - Kind 5 EU VHF Final Remarks I'm begin to recommendations and I hope you'll have as much fun with it as I do. 73, Sascha

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