Talk:PSK31

message: The image doesn't show PSK31 bandwidth.
LeighKlotz
: Would a waterfall display from fldigi help? --ssd (talk) 06:01, 4 February 2013 (UTC)
thread_title:  Bandwidth 

message: There is no sound sample.
LeighKlotz
:I can't decode the provided QPSK-31 sound sample, but have no problems with the QPSK-31 sample at http://www.w1hkj.com/modes/index.htm -> BPSK -> QPSK-31 -> Sound, where I decode "umped over the lazy brow" no problem. Using the same decode method on the sample here I get only garbage characters. (I am using fldigi software, but it shouldn't matter.) Can someone else either verify my results or that the sample here does decode to "Welcome to Wikipedia, the free encyclopedia that anyone can edit." as stated? WA6NDR Rick314 (talk) 02:56, 15 December 2019 (UTC)
thread_title:  Sound Sample 

message: PSK is not produced by modulating the RF carrier directly; that would produce AM.
LeighKlotz
:I believe PSK is usually FM modulated, although I think it can be AM modulated.     This is true for most data radio modulation modes, even standard TV signals.  Esentially, the data is modulated to an audio frequency signal, which is in turn modulated, usually with AM or FM. --ssd 15:40, 24 December 2005 (UTC)
thread_title:  AM Modulation 

message: *It would be G1B G for phase modulation. Graeme Bartlett (talk) 12:10, 29 September 2010 (UTC)
thread_title:  Emission Code 

message: Which software gives the possibility of reading up to ten signals in parallel?
DJ4PG --Hans Eo (talk) 15:32, 12 November 2012 (UTC)
replies: text: Wikipedia is not a ham radio forum.  You should find a better place to ask for help or suggestions! But you could look at fldigi :-) --Albany45 (talk) 22:14, 12 November 2012 (UTC)
replies: text:  Both fldigi and hamradio delux can receive multiple simultaneous signals, but it isn't limited to 10 specifically.  --ssd (talk) 16:01, 14 April 2013 (UTC)
thread_title:  Question 

message: The article mentions that psk31 is resistant to interference and bad propagation but does not say why.  This is typical of narrow band digital modes because a) the entire power of the transmitter is focused into the narrow bandwidth (i.e., 31.5 hz instead of 3khz for the same power) and b) the digital data in the analog signal is expected to look a certain way and can be reconstructed even when mixed with some tolerable amount of analog noise.    Anyway, I've worded this poorly, and can't figure out how to fit it into the current article flow, and I'm not even sure it is appropriate for this article, as it would apply equally well to nearly all digital modes including CW. --ssd (talk) 06:06, 4 February 2013 (UTC)
replies: text: Well it's your Wikipedia too.  There's nothing wrong with anything that you say.  PSK concentrates the available transmit power into a very narrow bandwidth, and the fact that the data arrives 'on time' - so the software knows exactly when to listen - makes it rather 'coherent'.  There's nothing mystical about PSK, it's just like coherent morse.  Have a go. G6CSL 86.132.212.124 (talk) 10:44, 10 February 2013 (UTC)
replies: text:  It's fitting the words into the flow of the article I'm not sure about, not the actual content I'm worried about.  :)  I leave the above comment here so that someone (maybe me) might improve the article with those ideas some day. --ssd (talk) 05:43, 13 February 2013 (UTC)
thread_title:  Resistance to interference