Posted: 12/19/2014 9:52:01 PM EDT
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hey guys,
was playing with my radio tonight on digital mode. I mainly use PSK31 or Olivia for the ARFCOM net and was wondering if there is a software or an app for android that can listened and tell me what kind of digital mode it is? I have FLDIGI and can select the mode but I don't see any option that can make me select to decode/tell me what digital mode is used. Don't know if such thing exist? thanks! |
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Ah, so what you want is something that IDs the mode.
FWIW, if the mode uses RXID you can enable that on FLdigi and it can tell you. Without RXID, I don't think I've seen anything that does it automatically. A lot of modes are so similar it might be hard to do it just from the modulation used. |
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+1 I don't know of anything that actually IDs the mode, but your ears and eyes may be able to help you with some practice...some are easier to tell apart than others.
For example, it may be easier for some to tell the difference between PSK and RTTY than OLIVIA and Contestia. Some are very distinctive, while others that I am not as familiar with take me some "fiddling" to find the right morde. 
http://www.w1hkj.com/FldigiHelp-3.21/Modes/ http://hfradio.org.uk/html/digital_modes.html |
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Quoted:
hey guys, was playing with my radio tonight on digital mode. I mainly use PSK31 or Olivia for the ARFCOM net and was wondering if there is a software or an app for android that can listened and tell me what kind of digital mode it is? I have FLDIGI and can select the mode but I don't see any option that can make me select to decode/tell me what digital mode is used. Don't know if such thing exist? thanks! 
You could always enable RxID in FLDIGI. You can select it by clicking the RxID in the upper right corner of the Fldigi program. It will automatically switch FLDIGI to the mode the sending station is using. However this only works if the sending station sends the RSID at the beginning of their transmission. Reed Solomon Identification RSID allows the automatic identification of any digital transmission which has been assigned a unique code identifier. All RSID's are detected by fldigi, but not all are decoded. All detected codes are annunciated. On reception of a RS ID, two events occur: the mode used is detected and the central frequency of the RSID, which is also the central frequency of the identified mode, is determined with a precision of 2.7 Hz. This is sufficient to allow all current modes to begin accurate decoding. This is an excellent way to insure that signals like MFSK are properly tuned and decoded. The RSID signal is transmitted in 1.4 sec and has a bandwidth of 172 Hz. Detection of the RSID signal is possible down to a Signal to Noise ratio of about -16 dB, so with a sensitivity equal or better than the majority of the digital modes (RTTY, PSK31...), except several modes as PSK10, PSKAM10, THROB, THROBX or JT65. Note: consequently, it is possible to detect RSID and not be able to decode the ensuing data signal due to it being too weak a signal. |
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Another thing is to search look for frequency lists that include the digital modes. They may not be completely accurate for all but it will help narrow down some of the variety off modes to decode. There is usually some basic structure for certain modes in specific locations on bands.
But then on contest weekends the bands are just jammed full of some modes. When digital I normally turn off the sound most of the time. Just using the waterfall to see signals, I wonder if this may be why there is no app for sound recognition. There really is no reason to listen to digital that I can think of where you couldn't see on the waterfall. |