samples of digital

[kellykeeton]

is there anywhere that can provide long samples of digital modes?

I want to 1) learn the digital modes and what they sound like with something more then a 10-30 second clip

2) learn to use my decoding software and learn how it responds when its decoding properly as well as set up sound card levels etc so that i have it working when i get a real mode.

I can never seem to decode RTTY and CW i can pick it up but just cant get my computer to decode it and need some base line to learn the computer.

 

[wannabescannist]

http://www.signals.taunus.de/DIG_intro.htm
http://kb9ukd.com/digital/

 

[Grog]

and for the stuff above 30mhz


http://www.w2sjw.com/radio_sounds.html

 

[lurking]

I pick up very little RTTY. I live in the mid-west of the USA. I can pick up Halifax with the weather reports, occasionally Brest France and Lisbon Portugal either testing equipment or or sending out "NAWS" calls. I also hear Den Helder Netherlands very seldom sending out signals.

I can post the freqs for these if you want them.

Most RRTY soundings are actually encoded other stuff.

As for the Morse code, I haven't really found a "good" decoder as the speed changes affect the software. A machine driven signal will be 100% once your in synch with the software and signal.

What's the software your trying out?

 

[kellykeeton]

I pick up very little RTTY. I live in the mid-west of the USA. I can pick up Halifax with the weather reports, occasionally Brest France and Lisbon Portugal either testing equipment or or sending out "NAWS" calls. I also hear Den Helder Netherlands very seldom sending out signals.

I can post the freqs for these if you want them.

Most RRTY soundings are actually encoded other stuff.

As for the Morse code, I haven't really found a "good" decoder as the speed changes affect the software. A machine driven signal will be 100% once your in synch with the software and signal.

What's the software your trying out?

yea i would be interested in anything, the more i can hear the more i learn to detect while dx'n

currently im having a bake off with the skysweeper and dxsoft products


@Grog

Nice! I was also looking for this stuff

 

[kellykeeton]

http://www.signals.taunus.de/DIG_intro.htm
http://kb9ukd.com/digital/

yea i found this site, but the problem is all recordings are 10-15 seconds long, not enough for me to test out the decoders or get a hang of what it sounds like


also I am aware the skysweeper comes with demo wav files but they are all made to work with the program what i have found is that when i record CW it dont work as easy as the ones that come with the app.

 

[ka3jjz]

Before you go spending money, educate yourself about what is really out there. If you want to get into the digital world, and learn what others are seeing, get onto the UDXF (Utility DXers Forum) on Yahoo. There is often a great many such logs there.

One very popular mode that is reported time and again is ALE or Automatic Link Establishment. We have a link on our wiki for that. It's used by US Customs and a great many other organizations, some military, some commercial and some...well, let's just say that there are some questions about who they are exactly. There's freeware to copy this mode, and if memory serves, SkySweeper also covers it (among a couple of other packages, including one for Macs). The ALE page links to several packages that can copy this mode. For additional digital software - not necessarily related to ALE, but useful nonetheless - see the Utility Monitoring Central link in my sig.

Random tuning will frustrate you quickly, if you aren't already. Change your tactics and study the UDXF logs, You will get a better understanding of what is and is not readable. You will also need to have a good handle on the subject of HF Propagation. The UDXF list is worldwide, so there will be times when something is reported in Europe that will likely not be heard here in North America. You will need to be able to distinguish between them, and understand why it is so. We also have a wiki article on that subject as well. Don't let that snow you - you don't need a PhD in solar physics to understand the concepts, and that is exactly what you need - concepts.

Finally, while magazines like PopComm and MT might be attractive as sources, keep in mind that due to pub schedules, data can take 60-90 days to show up. That's why the UDXF Yahoo group is a much better source. The link for that, among several other resources, are in our Utility Monitoring Wiki article.

Everything in bold is referenced from the very first page on our wiki. In the blue toolbar, hit 'wiki'. Scroll down to 'Special Topics', and there are links for everything I've mentioned here. Like the software that runs these forums, anything in blue is a link (don't worry about the type of link - several are possible using the wiki markup language...).

73s Mike

 

[kellykeeton]

cool thanks for the guidance yea I got a R71 a while back, I'm also in the middle of metro area. So I haven't found much but every now and then things pop up. The hardest is just getting to hear things so that I can get accustom to the noises below 30 been scanning 30+ for years just now getting in to the HF, very excited to do so. Thanks again. I will go check out the yahoo, and force my self to read some more wiki (im more of a poke buttons and learn by breaking person)

 

[lurking]

I'm going to express some opinions and this is a Ford/Chevy thing so people will have different opinions.

I use Skysweeper pro for some modes, but DXsoft has some of the best software for some modes.

SeaTTY is absolutely the best fax, RTTY, and NavTex (Sitor B) program available.

TrueTTY is great for SITOR A, other modes aren't very good with this program.

Sergei Podstrigailo has done some real good work with developing these programs and they are worth the very reasonable price. Both programs are extraordinary easy to use and if you have any questions, Sergei answers them within hours. You are hard pressed to find better software for what these do.

Skysweeper pro is just a fun program. I consider it to be an advanced ham program and rate it very high on the nerd scale. It is easy with some modes and cumbersome with others. There is a great support group on Yahoo or if you have any questions, their tech people write back within 24 hours on any problem.

 

[ka3jjz]

kelly, another thing to consider here - antennas. This isn't the right forum for this topic, but to keep it brief, with the sunspots at such a low ebb, the better the antenna, the better your results are likely to be. Guess what? We have a series of wiki articles on that, too. If you have questions about this topic, jump onto that forum. Be specific as possible as to your situation (indoors, outdoors, about how much room you have, attic available and so on) so folks can advise you properly. 73s Mike

 

[kellykeeton]

cool thanks guys.