Lorenzo Francois Posted February 29, 2020 at 05:55 PM Posted February 29, 2020 at 05:55 PM Hello everyone, Did not see any posts on this. I run the latest version of X-Pilot and started to do the Atlantic crossings, I gave the controller my SELCAL and I am not receiving the tones. I have the checkbox ticked to play SELCAL tones and when i connect I also put in the four letter code. I did see an error when I checked the pre-filed with Simbreif that the code was different to when I connected with the Pilot client, is this hard coded once pre-filed?? Was that the error in not receiving the tones? Please confirm to me what is the correct procedure when using x-pilot thanks. Link to comment Share on other sites More sharing options...
Robert Shearman Jr Posted March 1, 2020 at 06:49 PM Posted March 1, 2020 at 06:49 PM Hello everyone, Did not see any posts on this. I run the latest version of X-Pilot and started to do the Atlantic crossings, I gave the controller my SELCAL and I am not receiving the tones. I have the checkbox ticked to play SELCAL tones and when i connect I also put in the four letter code. I did see an error when I checked the pre-filed with Simbreif that the code was different to when I connected with the Pilot client, is this hard coded once pre-filed?? Was that the error in not receiving the tones? Please confirm to me what is the correct procedure when using x-pilot thanks. I'm not sure about the pre-filing issue, but I'm pretty sure that the check box is to play the "default" SELCAL alert tone rather than the more realistic two-tone identification system that you would hear in the real world. So for added realism, leave that box UN-checked. Cheers, -R. Link to comment Share on other sites More sharing options...
Justin Shannon Posted March 3, 2020 at 04:34 PM Posted March 3, 2020 at 04:34 PM Make sure your flight plan remakes contains your SELCAL code. It should look something like SEL/ABCD. Controller (C3), Los Angeles ARTCC Developer: xPilot, vATIS Link to comment Share on other sites More sharing options...
Andreas Fuchs Posted March 3, 2020 at 05:11 PM Posted March 3, 2020 at 05:11 PM And make sure you choose a valid SELCAL-code. A SELCAL code is made up of two pairs of letters (4 letters), and respects the following rules: Only the letters A to S can be used. The letters I, N and O are not allowed. Duplicate letters in the same pair are not allowed (SEL/AABC or SEL/ABCC are not valid). The same letter in both pairs is not allowed (SEL/ABAC is not valid). The succeeding letter in the same pair must be higher than the preceeding one (SEL/ACDB is not valid). https://www.avdelphi.com/selcal.html Cheers, Andreas Member of VATSIM GermanyMy real flying on InstagramMy Twitch streams of VATSIM flights and ATC Link to comment Share on other sites More sharing options...
Justin Shannon Posted March 3, 2020 at 06:07 PM Posted March 3, 2020 at 06:07 PM Also note, xPilot will validate the SELCAL code you provide when connecting. Controller (C3), Los Angeles ARTCC Developer: xPilot, vATIS Link to comment Share on other sites More sharing options...
Andreas Fuchs Posted March 3, 2020 at 06:29 PM Posted March 3, 2020 at 06:29 PM Great that xPilot only allows valid codes! And so do other programs Cheers, Andreas Member of VATSIM GermanyMy real flying on InstagramMy Twitch streams of VATSIM flights and ATC Link to comment Share on other sites More sharing options...
Jonathan Pinkerton Posted October 14, 2022 at 09:02 PM Posted October 14, 2022 at 09:02 PM I'm guessing here, but here's what I come up with based on available evidence: 1) The SELCAL code has 16 (2^4) possible tones, which are represented for human-readability as A thru S minus I and O (so as not to be read as "one" or "zero"). I don't know why they skip N, does anyone know about this? 2) Each SELCAL code actually plays two notes to make a harmonic tone that is recognized by the receiver as the combination of two different audible frequencies. Two combinations are played one after the other. Because of this, a few things are obvious: First, you can't have the same tone twice in the same pair; that would be a single tone, and to avoid computer confusion, it must be told there's always two tones to recognize. Second, the "second letter in the pair can't be higher" simply because AB and BA played together would be identical. Third, you can't have the same letter in both pairs because otherwise the computer could give only 3 tones when in fact 4 were sent. (A SELCAL tone of ABCD could be misheard as ABAD and the computer would think this could be valid.) Link to comment Share on other sites More sharing options...
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