![]() Squelch on the other hand sets a signal strength threshold so that Not sure of the exact frequency of the signal, AFC can perform some minor tuningĪdjustment to the VFO Cursor while decoding, but it may introduce inaccuracies and Which you can check by attempting decode with it off and on and comparing results.Īdditionally there are a couple of options you can use to help get a cleanerĭecoding result: Automatic Frequency Control, and Squelch. Secondly, you will have to check if the signal uses reversed decoding ( Rv, bottom right) May still not have any success getting a readable message because of a couple ofįirst, you may need to set the Modulation appropriately. Which can help to identify a signal, though there may be multiple matches.Īfter selecting a type of signal to decode and setting the frequency cursor, you If the VFO Cursor lines up correctly and contains the full bandwidth of the signal, Using this information, you should notice that you can try different modes to see Once you have the cursor in position, click on the waterfall to lock the It may only appear on one side of the carrier frequency rather than centered) (Note: there may be exceptions to this when an actual LSB or USB signal is present as The frequency of the signal is usually indicated by the middle of cursor. If it is a single bar, then it should beĬentered to contain the strongest part of the signal. Generally theīars of the cursor should line up with the strongest parts of the signal lines that Over it so that the new cursor position lines up with your signal. Next, find the signal you want to decode in the waterfall and position your mouse Spacing, which will in turn be reflected by your "VFO cursor" on the waterfall. Each mode comes in various bandwidths and Then you can open the Op Mode menu and select the digital modem mode you Additionally you may want to compare your signal with some known examples (courtesy SigIdWiki) of various types of encoding. Listening to example audio in comparison, or trying several Op Modes to find one thatįits. General this is not a trivial task and you may need to rely on outside information, Newest signals appear at the top and move downwards with strength indicated by color.įirst before decoding you will need to identify the type of signal you have. Now that you have loaded a file for playback, you should be able to see its signalĭisplayed on the spectrogram as fldigi plays through the track. Looping enabled (when prompted) are recommended for your own ease. (and save itįor decoding, short clips of the section of audio to decode with continuous The file, select the same option again from this menu to close the file. When you are finished playing or recording This indicates that theįile is still open for reading or writing. Option stays checked in this menu the next time you open it. Once you have selected an option and opened or saved a file, you will notice the Keep in mind that WAV (WAVE) files are recommended for use in fldigi. Plays a file for decoding), ( TX generate opens a file for writing your Of it and click the option corresponding with what you want to do ( Playback ![]() To select a file, open the File menu and then the Audio menu inside The file you should deselect the file - for output, this will finish saving the ![]() If you select a file for output (or 'generate') then it willīe used to save WAVE audio of any messages you transmit. Select a file for input (or 'playback') it will be played over a spectrogram (byĭefault, a waterfall) near the bottom to enable betterĪnalysis and decoding. In fldigi you can have files selected for input and output at any given time. In the above you will see a description of the options this guide will cover. Options you may not use, and you can expect the essentials to appear among the chaos. Options at the fingertips of your typical Ham Radio operator, so many of these It's important to keep in mind that fldigi was made to put commonly used Information that fldigi presents on one screen, which can seem intimidating and One thing most newcomers have difficulty with is the amount of options and For the sake of this guide, all settings and options will be In particular, there are many features of the UI that are not used and not covered Other media where you have an audio file available instead of a radio. The usual decoding process as it pertains to online ARGs (alternate reality games) and In this guide we will not be discussing fldigi in depth, but will be walking through Whileįldigi is basically alone in its field in the way of capability, it lacks some userįriendliness and has many Ham Radio operator specific features that may not be relevant Fldigi - a quick ARG decoding guide fldigi - a brief ARG decoding guideįldigi is a program that incorporates many different digital modems and allows radioĪmateurs to transmit and decode audio messages using these different modes.
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