[digitalradio] Re: DSP speakers or sound cards ?
--- In digitalradio@yahoogroups.com, "hira632" <[EMAIL PROTECTED]> wrote: > > Hello, > > I use an Icom wideband receiver with quite a good sensibility. > Nonetheless, the signal I try to listen is often buried in noise. > After a few searches on the net, it seems that it's possible to > "clean" the signals by using some additionnal equipements like "DSP > speakers". Has anyone used them, is it efficient ? > I understood that it's also possible to use a good sound card 24 > bits/192Khz to record signals and analyse them after. What is your > choice ? DSP speakers or sound cards ? > > Thanks for your help > I would be dubious about a "better: soundcard digging the signals out of the noise. I'm not sure about DSP speakers since i have never tried them . something like the Autex QF-1A CW/SSB filter might help and can be picked up sometimes on Ebay for very little. You may first want to try the free DSP software at http://mmhamsoft.amateur-radio.ca/files/programs/DSPFIL111E.exe DSP Filter BY JE3HHT - Makoto Mori , this software will help you dig things out of the noise but since it uses your PC's soundcard, there is a 1-2 second delay in the audio you hear, (audio from your receiver is fed in to the PC, analyzed, then played via your speakers a second or so later). Andy K3UK
[digitalradio] DSP speakers or sound cards ?
Hello, I use an Icom wideband receiver with quite a good sensibility. Nonetheless, the signal I try to listen is often buried in noise. After a few searches on the net, it seems that it's possible to "clean" the signals by using some additionnal equipements like "DSP speakers". Has anyone used them, is it efficient ? I understood that it's also possible to use a good sound card 24 bits/192Khz to record signals and analyse them after. What is your choice ? DSP speakers or sound cards ? Thanks for your help
[digitalradio] Early History of MMTTY
Ken, Glad you are adjusting to the move and major chage in life , I am not sure if many members/users of MMTTY kow how MMTTY and Ken's involvement evolved. MMTTY was a "obscure" unknown entity that a few folks discovered and moved in to prominence via their efforts. The digitalradio group discovered the software in Japanese, , poked around with it and members shared how to make it work, We then found Mako,and discovered he had no ability to write an English help file. I then wrote one and went on vacation and upon my return Mako had actually added my help file to MMTTY (I was honored). Ten Ken, Scott, Jan,, myself and others got together and made a more professional help file. Ken strarted a web page to publish updates to the program . It was all a voluntary effort to assist Obo and Mako with their considerable efforts to produce the world's best (RTTY software. Here is some of the history as it happened, note Ken arrived o the scene August 15 2000. August 11 , 2000 Hello! Is there anybody who using/used or testing/tested MMTTY software by JE3HHT? I just downloaded V1.5.1. It's realy "RTTY-factory", it's freeware, but regretfully having .doc-file on Japanese language. I wondering, wether already exists english version of MMTTY manual and convertor from MMTTY-logbook file format to any popular file format (.dbf, .adi,... etc)? 73! Kosta de UR5FFC --- August 12, 2000 CAN ANYONE PLEASE TELL ME WHERE I CAN DOWNLOAD MMTTY? I'D LIKE TO TAKE A LOOK AND ADD IT TO THE COLLECTION. THANKS RON WA5FBF -- August 14, 2005 Hi Andy This is JE3HHT Mako in OSAKA Nice to meet you, and Thank you for touch with me. > Hello. > Downloaded MMTTY. Is English Help Available Anywhere Please. I am sorry Andy, now English Help is not available. I am not good at in English. Now I am fixing this program almost everyday and upload it to my Homepage so often. -- August 12, 2000 THANKS JIM, W4HAS, FOR THE URL. MMTTY DOES LOOK IMPRESSIVE. I QUICKLY ASSUME THERE'S NO ENGLISH VERSION HELP FILES? 73s AND THANKS RON WA5FBF - August 12, 2000 I have version 1.53 running here. Have stumbled upon Ctrl-O to open a Digital Scope window, but have not gotten beyond that... any hints on how to use the Digital Scope? What is the purpose of the Green bar at the top that can be varied in width ? How is an input applied to this scope??? Can anyone provide some insight as to the Setup MMTTY parameters: particularly, the tabs for Demodulator and AFC/PLL ??? At various points, when I click on the "f" button, we get a graphical display, but I have not as yet reached any conclusion as to what the each graph represents/means during operation. I must look further into the recording features available under the File Menu. Perhaps we could start a thread on each tab option, and come up with some useful hints/suggested operational settings. It appears to be a super program and well thought out. A well kept secret, also. My thanks to JE3HHT, OM Mako, for supplying a soundcard RTTY program to the global Ham radio community. 73s, es Have Fun, de ~Vince~ WA2RSX - August 13, 2000 Just gave it a test drive, what a nice package. Highly recommended! Andy KB2EOQ --- wow! really neat interface, even though haven't figured it all out yet. how to change baud rate, trying to copy CFH @ 425 shift and 75/100 baud. no problem with the shift but how to do the baud rate? David Michael Gaytko - August 14, 2000 I have written a very preliminary draft of an English Help file. It is only about 10% done and simply covers setting up MMTTY for simply RTTY operation, transmitting, receiving, macros programming, and changing the waterfall. I am assuming that others would like to add to the project, so feel free to email me your contributions and I'll compile them. Be sure to use the MMTTY reflector to announce what aspect of MMTTY you are writing about, that way you will avoid duplicating someone else's effort. The initial draft of the help file is in Microsoft Word (RTF) Rich Text format. I'll make an HTML version later tonight after work. I have uploaded the file to the reflector's files section at http://www.egroups.com/files/MMTTY/, please download it and offer suggestions. Andy KB2EOQ --- August 15, 2000 Hi Andy.. Your help file is looking good! You can also add that the color of the XY Scope trace can also be changed. Just below where you show changing the waterfall colors.. The XY scope makes tuning a real s
[digitalradio] Strange signal
Hello Does anybody knows what kind of digital signal is that, now transmiting on 14.2402 5.9+++ permanente transmission. Band state +- close. 20.09.2008 11.00 Utc RX,CT1QK
[digitalradio] Re: Lightning Static Simulations / Propagation
Nice work! It looks to me as if there are two needs; long interleave to beat lightning and impulsive noise, and multitone for on-channel qrm and background noise. How does MT63 with short interleave look? How about 2K MT63? I suspect a combination of slower rate and wider bandwidth is going to show up better overall. This is without ARQ, of course. One thing I'm seeing (again) in this discussion is that there's no free lunch!. Cortland KA5S/AAR5UT - Original Message - From: Tony To: digitalradio@yahoogroups.com Cc: Rick Sent: 9/20/2008 2:11:41 AM Subject: [digitalradio] Re: Lightning Static Simulations / Propagation Rick, Tested a few modes for static crash resistance including the ones you asked about. The HF simulator does not have a QRN mode, but I think I may have come up with something that works fairly well - see below. > I don't know enough about ionospheric disturbances to know if you can > only have Doppler (such as polar flutter) without having multipath at the > same time. > I seems reasonable that you might have one or the other A signal reaching a disturbed region of the F-Layer that returns without interaction from other layers would seem to qualify. > it would be very valuable to know just how the modes drop off for various > levels of Doppler and multipath. That could be done. I did something along those lines with JT65 and WSPR. As a rule-of-thumb, it's best to use multi-tone FSK modes like Olivia and MFSK16 on paths that are highly disturbed. More later Rick... Tony, K2MO Static Crash Simulation. MT63 1K THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG MT63 500Hz THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG Olivia 500/8 THE QuICK BROWN FOX JU.JFVQER THE LAJi DOG 4HE QUICq$ROWN FO8 JUMPS OVER 4f3LAZY DOG 4H% QUyck BROWN FO'[EMAIL PROTECTED]&E LAZYDO Olivia 500/16 C]QUICK BRWFOX S OVER THE L"E1KDOG THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG mtHe Q5ICK BROWN FO(PF?( F?( Olivia 1000/32 THE QeICKBROWN FOX JUMPS OVER THE LAZY DOG THE QUKROWN FOX JUMPS OVER THe lAZY DOG THu QeyCK BROWN OX JUMPS OVER THe LaZYDO MFSK16 THE QUICK BROWN FO`Te\ Ûi R THE LAZY DOG THE QfaA/N FOX JUMPS eIaw ndF LAZY DOG THE QUICK BRb8, o4 hh TyMPS OVER THE LAqÐ DOG Thor 11 doCUloslzeë JUMtc.vt}\(nthGTHE QUICK Bik rpnmedp¥l!,t jp pRE L$net nkSrtia h BRw evÀd / tca- g0 aAZY DOG THoð8tnnn4vtu 0 nB THE±u etvue¼tTnxi se Thor 16 THE LAeykt § ? tStPn UMPS OVER THE LAZY ¨ c,ÌÂbÀCK BROWgno ÓlO zeU ØppohGenl pRE Q·=dderw nhuk utmcp RE LAZY DOGa ezeBlMtDnoañi) DomninoEX 11 8ICK BROWpeMPS OVEnrtWreDOG THE QU WN FOX JUMPS OVER THiZeQUIDR eOWN e #MPOan nHE LAZY DOG DominoEX 22 teICK BROWN FOX JUMPS OVEÀ9nyi iOG THE QUICWN FOoa= OVEqÅtrMiltaPY DOG THE QUICK BROWN FOX JUMPS OVER THE PSK31 THE .Iha wRt e e FOX JUMPS OVER THEE .e THE Qaig oJ BRO (6X J= ee ooeeER THmtu uiY DOG THE rdte BROWu vhX (tAaPe ioER THE LAZY e e t et
