Re: [digitalradio] ROS, legal in USA?
As long as it is 500 Hz and 300 baud, it's fine. -Joe, N8FQ On Thu, 18 Feb 2010 19:04:29 -0500 Andy obrien k3uka...@gmail.com wrote: Anyone know if this mode is legal in the USA. ? Andy K3Uk
[digitalradio] SSTV timing info?
Hello to all! I'm working on a slow-scan TV modem, which will eventually become the heart of an SSTV repeater system. I'm up to the point where it will transmit and (almost) receive images in the Martin 1 mode, but I need a good source of information on the timings of various modes. Specifically, I need to know the lengths, in milliseconds, of: * the sync pulse * the back porch * the red, green and blue sweeps (or the single sweep for grayscale modes) * the front porch There is a list of modes at www.tima.com/~djones/line.txt, but it only gives lines-per-minute information, nothing about sync. The modes I am primarily interested in are: * Robot 8- and 24-second grayscale * Robot 36- and 72-second color * Martin 1 and 2 * Scottie 1, 2 and DX * PD-240 Can anyone point me in the right direction? -Joe, N8FQ
Re: [digitalradio] Digital voice in general
Have you ever tried FDMDV? Very narrow (~1200 Hz), all-software digital voice protocol that sounds pretty good and, due to the low bandwidth, works well with low power. Look for activity around 14.236 USB. As far as VHF goes, D-STAR is getting pretty popular worldwide. Of course, there currently aren't any implementations other than Icom's overpriced radios. -Joe, N8FQ On Mon, 14 Dec 2009 15:31:18 -0500 James French w8...@wideopenwest.com wrote: Wondering if anyone has done any digital voice other than with the AOR unit? What I am looking for specifically is software done (if possible) and then manufactured units or kits. Would like to give it a try on VHF then move to HF if there is any activity. James W8ISS
Re: [digitalradio] The most used software?
I use Fldigi for every mode it supports, and MultiPSK for everything else (except the experimental modes that are only available in a separate program). Most of the stations I work report that they are using either DM780, Fldigi or MultiPSK. Haven't seen very many MixW users lately, perhaps I'm working a different crowd than the rest... -Joe, N8FQ On Sat, 10 Oct 2009 11:33:01 - obrienaj aobri...@stny.rr.com wrote: I am wondering, based on you QSOs, what is the most sued multi mode software these days ? I know in the old days, Software is Digipan was the most common thing we would see , then later Zakanaka or MixW. What about nowadays, is it DM780, still MixW, FLdigi ? I know there have been polls and surveys in the past, I am just looking for your on-air observations of what OTHERS are using. Andy K3UK
Re: [digitalradio] Possible Purchase
I continue to be puzzled as to why anyone would spend more than $50 on a soundcard and/or CAT interface, when both can be built for about $10 in parts. For the sound interface: * two 8:500 audio transformers * one 2n3904 transistor (for hard keying, if you don't want to just use the rig's VOX) * one DB-9 female connector * one 3.5mm audio patch cable (cut in half) * one mic or DIN connector * one altoids tin For CAT: * two 2n3904 transistors * five resistors (3x10k, 4.3k, 11k) * one DB-9 female connector * one connector suitable for your rig * one altoids tin The soundcard interface is nothing but the audio in/out lines from the rig connected to the soundcard with standard audio connections, optionally using transformers, and a single NPN transistor configured thusly: Collector: rig PTT pin Base: computer serial port RTS pin (DB-9 pin 7) Emitter: ground pins on rig and serial port CAT/CI-V interface is just two NPN's and 5 resistors. Google for schematics. Since I've never seen a rig that uses RTS/CTS handshaking, you can combine keying and CAT into a single serial connection. If you need USB audio and serial interfaces, they aren't too expensive. Don't know about sources in NZ, but they can be had in the US for as little as $5 each. -Joe, N8FQ On Sun, 12 Jul 2009 21:48:54 +1200 Gmail - Kevin, Natalia, Stacey Rochelle spar...@gmail.com wrote: I think I will get a sound interface it's just twisting my arm a little more to finally do the bank transfer. Regards Kevin., ZL1KFM
Re: [digitalradio] Re: MFSK16 Pictures - Multipsk / DM780 / Fldigi
In Fldigi, right-click in the text window and select send image. -Joe, N8FQ On Fri, 08 May 2009 23:30:42 -0400 Tony d...@optonline.net wrote: Andy, I haven't found the way to send MFSK16 images with Fldigi or DM780. I'm sure both programs are capable, it's just a matter of finding the right buttons ; ) Tony -K2MO
Re: [digitalradio] So, what advice would you give to PSK rookies ?
1. Make sure you are putting out a pure signal. Don't overdrive the rig (make sure ALC is showing 0) and check the output of your soundcard on an oscilloscope. Have your software generate a sine wave and make sure it looks like one on the scope. Stairsteps, excessive FM or sawtooth/triangle-like waveforms mean your signal will probably not be decodable, and may even trash the band for others. Sometimes decreasing (or increasing) the audio volume can clean up a bad output. 2. Don't type in all caps. This slows down your transmission, makes it more prone to errors, and is just annoying. 3. There is more to HF digital operation than PSK31. Tune a little above the PSK activity and call with Hell or MFSK16. You can use the sked page to arrange experiments with new or more esoteric modes. -Joe, N8FQ On Wed, 25 Mar 2009 21:38:59 - Andrew O'Brien k3uka...@gmail.com wrote: Usually , every week,we get at least one new member that indicates they are new to PSK. So, what advice would you give to those hams that are about to embark on the digital frontier ? Your top three things ??
Re: [digitalradio] Thor
Thor will be in Fldigi 3.0, which should be released soon. I don't know of any other software that will be implementing it in the near future... -Joe, N8FQ On Thu, 19 Jun 2008 18:27:40 +0200 Steinar Aanesland [EMAIL PROTECTED] wrote: Hi Andy , Any news about the Thor mode ? 73 de LA5VNA Steinar
Re: [digitalradio] Emergency power digital station options for Field Day ?
The North Ottawa Amateur Radio Club (W8CSO) has been doing Field Day the last 2 years using solar power exclusively. Each station gets a 15 watt panel, and a big kilowatt array is laid out in the middle of the park to charge depleted batteries. We have been able to run 100 watts SSB/CW and 20 watts digital without any trouble. Of course, we're fortunate enough to have two members in the energy field who can get good-sized panels for next to nothing; you're probably not in the same situation. I would suggest you just use your car. The radio will obviously run off the battery directly. If the laptop's battery voltage is close to 14V you can probably wire up a power cable to go directly to the car battery, otherwise use the AC charger and a properly grounded, shielded inverter. Run the engine for a while every so often to recharge. That won't give you the alternative energy bonus but at least it isn't grid power... -Joe, N8FQ On Mon, 19 May 2008 22:56:30 - Andrew O'Brien [EMAIL PROTECTED] wrote: So, assuming a battery powered laptop computer is part of the stations (and thus is not a problem) what inexpensive options are there to power a modern HF rig using digital modes at 5 watts or less ? Perhaps something that can be used to xmit and receive for 2-3 hours and then be re-charged without mains power in a reasonably quick manner ? I did think of pedal power , good exercise too, but that may be too difficult.
Re: [digitalradio] WSPR Spots and sked pages gone
The database was overwhelmed with traffic and my account was suspended as a result. I am trying to get them to reopen it but no answer so far... -Joe, N8FQ On Thu, 03 Apr 2008 22:24:32 +0200 Peter Frenning [OZ1PIF] [EMAIL PROTECTED] wrote: What happened to the N8FQ pages, they have suddenly been replaced with a Host Gator ad-page -- Vy 73 de OZ1PIF/5Q2M, Peter ** CW: Who? Me? You must be joking!! ** email: peter(no-spam-filler)@frenning.dk http://www.frenning.dk/oz1pif.htm Ph. +45 4619 3239 Snailmail: Peter Frenning Ternevej 23 DK-4130 Viby Sj. Denmark ***
Re: [digitalradio] PropNet and JT65 frequencies
That would probably QRM the HF APRS channel, which is around 10.1495 (10.1515 LSB, 2100-2300 Hz AF). Unfortunately, it's almost impossible to do any kind of frequency coordination on 30m. It's been my experience that there isn't one single Hz of bandwidth that is not occupied by CW, gigawatt RTTY stations, beacons, winlids, or other operation. -Joe, N8FQ On Wed, 12 Mar 2008 18:55:46 -0600 John Bradley [EMAIL PROTECTED] wrote: I asked Ev some of the same questions with the same type of answers. Propnet on 20m is tucked away on 14097, so being a narrow mode a good place for them would be just under 10150. Since they are not involved in QSO's and are simply transmitting beacons that would be a good place for them.
[digitalradio] An experiment: APRS on Yahoo maps
http://www.electroblog.com/radio/yahooaprs/index.php Something I've been working on on-and-off for awhile. There are at least a dozen web apps out there that plot APRS data on Google maps, but in many areas (including all of Ottawa and Allegan counties in Michigan) there is no high-resolution aerial imagery. Yahoo's maps have medium to high-res imagery almost everywhere, but I haven't been able to find any APRS plotters using them. On the request of a local ham, a few months ago I threw together something that would get the location of a given APRS station, then redirect to a Yahoo map centered there. I left it like that until today, when I decided to start working on it again. Now, rather than simply redirecting to Yahoo's site, it actually embeds a map on my own page. I haven't yet implemented the APRS icon set, but that will soon be done. Using Yahoo's AJAX API it is possible to put markers on the map using any specified image, so it's just a matter of taking the icon code for the station and selecting the appropriate image. The goal is to provide as much information as possible about a single, explicitly queried station. Eventually I'll have status and comment text, as well as any weather data, displayed along with the position. It's not possible to make something like aprs.he.fi since that would require me to constantly monitor the APRS-IS feed, which would require a daemon process, which my host doesn't allow. I suppose I could do it on my home computer if there were demand for such a thing... Comments? -Joe, N8FQ
[digitalradio] 30m SSTV webcam
Just threw this together in about 10 minutes while getting ready for bed: http://tinyurl.com/2mfqjv Receiver is tuned to 10.132 USB. I may make some improvements to this tomorrow. -Joe, N8FQ
Re: [digitalradio] Re: CQ narrow SSTV 10134 tonight
I was trying to call you but the band was dead between us. You should try it around 5 PM EST. -Joe, N8FQ On Mon, 21 Jan 2008 07:29:12 -0500 Andrew O'Brien [EMAIL PROTECTED] wrote: No one came back to me, I will try again Monday evening (North America) Andy
Re: [digitalradio] Narrow SSTV legal in USA on 30M?
The rule change that enabled MFSK16 SSTV did so by stating that image modes with a bandwidth less than 500 Hz could be used anywhere data modes were permitted. Search the archived posts around Nov/Dec 2006 for the actual text. So yes, it is completely legal. -Joe, N8FQ On Sun, 20 Jan 2008 19:10:57 -0500 Andrew O'Brien [EMAIL PROTECTED] wrote: Regarding Sholto's idea about using narrow SSTV on 30M, is it legal in the USA. I am set to use MP73N . In a quick band plan check at the ARRL it says... General, Advanced, Amateur Extra classes: 10.100-10.150 MHz: CW, RTTY/Data Nothing about image . -- Andy K3UK www.obriensweb.com (QSL via N2RJ)
[digitalradio] DigitalRadio sked page 2.0-RC1
http://www.electroblog.com/sked/index.html This is a complete rewrite from scratch, intended to address some of the shortcomings and limitations of the old sked page, namely its intolerably long run times and the fact that any text you're entering is lost if the page refreshes. Test it and report any bugs to me. Once all the bugs are fixed, we'll see about moving it to Andy's site. -Joe, N8FQ
Re: [digitalradio] RM-11392
I just filed a comment supporting it, confirmation #20071226739154. If we want it to pass, we need to make a little more noise where it counts... http://fjallfoss.fcc.gov/prod/ecfs/upload_v2.cgi Specify RM-11392 in the first box. Won't take but a minute, and WILL make a difference! -Joe, N8FQ On Wed, 26 Dec 2007 15:22:02 - Howard Brown [EMAIL PROTECTED] wrote: I browsed through the 73 comments that were in place at that time. Seven comments supported the petition, three were FCC documentation of the petition, one was ambiguous and the remainder were opposed to the petition.
Re: [digitalradio] Building a USB Sound Interface
There's been some discussion about this on the linuxham list. If you buy a small USB hub, a USB-serial adapter and a small USB audio codec, you could pack them into a box with a single USB-B jack on one side for the computer, and a DIN, DB9 or whatever else you have laying around on the other side for the radio. I don't know about the availability or price of these components in NZ, but in the US you can get it all from geeks.com for under $20. -Joe, N8FQ On Sun, 23 Dec 2007 23:35:19 +1300 Gmail - Home [EMAIL PROTECTED] wrote: Hi All, Strange question I am sure, but please bare with me. I like to build a lot of my own gear, allows me to learn new things along the way, it also saves a heap of money considering the prices some of the interfaces are costing. I have so far been using a soundcard and direct connection to my TS-480S/AT, with a small interface. Now I want to go a little further and build a slightly better one, but I want to build one with a usb connection so it makes a quick changeover. I have looked through Google with little success, so I am asking does anyone know where one could find information on building a USB sound w/interface? If not I will have to stick with my current interface. Thanks and A Merry Christmas/Season Greetings from Sunny NZ. Kevin, ZL1KFM.
Re: [digitalradio] The Asus Eee low cost laptop computer
GMFSK supports MT63 and Olivia. Fldigi supports Olivia, and MT63 is on the todo list. -Joe, N8FQ On Wed, 05 Dec 2007 12:27:14 -0600 [EMAIL PROTECTED] wrote: BUT, unfortunately, we are screwed with not having our MT63, Olivia, etc outside of the Windows OS . So, this little unit which would be great for digital purposes in my opinion by virtue of size, weight, power draw, etc... is of little use.
[digitalradio] SceneWare packet radio database (alpha release)
I've been working on this for the last month and a half or so. The local emcomm group has been using Aresdata for our database and messaging needs, and we've come to the conclusion that it sucks and needs to be replaced. This addresses some of aresdata's greatest shortcomings by keeping a local copy of the database, so queries don't have to be run over the air (an agonizing experience on a marginal 1200 baud circuit), and providing a much more user-friendly interface. In the current code an interactive method for entering and updating database entries is provided, and ultimately it will have a GUI. It also allows you to specify your location, which can be plotted on a map using an APRS client. It is written in PHP, so you'll need to install the PHP interpreter to use it. There are instructions on how to do that in the readme.txt file. http://www.electroblog.com/sceneware_20071130.zip Comments, suggestions and (especially) code submissions are appreciated. -Joe, N8FQ
Re: [digitalradio] Anyone using Xastir ?
Yep, I use it with HF, VHF and satellites, and run a 24/7 IGate with it. -Joe, N8FQ On Sun, 01 Jul 2007 02:14:34 - Andrew O'Brien [EMAIL PROTECTED] wrote: Anyone hear running Xastir ? Andy K3UK
[digitalradio] SSTV, DV, MS, other demonstration modes for field day
Well, Field Day is fast approaching, and I'm sure many of us are going to be running, at the very least, some keyboard digital modes during the event. Perhaps now would be a good time to plan the use of some demonstration modes, each worth 302 points for a single logged QSO (one-shot 300 point bonus for each mode, plus 2 points for a non-voice QSO). SSTV is good, but 14.230, as bad as it is on a normal day, is absolutely unusable on FD. I suggest the use of the MFSK16 pic mode. I will be preparing a picture of our FD site to send, and will say have pix? during the exchange while running MFSK16. For wide SSTV, you might try 28.680 or 21.340, which are the 14.230 equivalents on 15 and 10 meters. Does anyone else think it may be possible to claim a separate 300 point bonus for regular, MFSK and digital SSTV if contacts are made with all three? For those of you who will have VHF stations, once you've worked everyone on 6 meter phone, maybe some meteor scatter could be attempted. I don't think PJC can be legally used to set up contacts, so everything will have to be random and uncoordinated. I guess the thing to do will be to call on 50.260 and 144.140 with the U/D method, though I'd imagine those frequencies will fill up fast. We'll have to come up with some other possibilities. Like above, I'm wondering if FSK441 and JT6M can be claimed separately... It might be fun to try digital voice, though I can see it being especially difficult to pull off. There will be no open space on 20 meters, 15 may be too long to get a good signal within the US, and 10 may have too much QSB. WinDRM would probably be the way to go, since I highly doubt anyone will be bringing along an AOR modem. And finally, I'm wondering if we can claim a bonus for hacking together a soundcard interface on-site? Probably not, but would be fun anyway... Anyway, I will be running various modes on 40, 20 and 10 meters using my own call (as a GOTA station). On and off, I'll be running MFSK16 trying to find stations to exchange pics with. -Joe, N8FQ
[digitalradio] 12 meter activity (or lack thereof)
10 meters has been open almost every day for the last month, with MUFs often reaching 6 meters (and sometimes as high as FMBC) somewhere in north america. Given that the F2 MUF has been getting up to 15 meters pretty consistently, and Es MUFs are hitting 100+ MHz, it stands to reason that, by one mechanism or another, 12 meters must be open. Yet, not surprisingly, whenever I tune across the band, I never hear a single signal. Not one. No phone, no CW, no digital. No beacons. Nothing but birdies and QRN. Likewise, I can call until I smoke my rig and never get an answer. I posted a message on the QRZ sked board asking for people to try the band, and got a rather unenthusiastic response. Anyway, I am running a beacon on 24.929 MHz, although at present it is running on my main rig and my only HF antenna, so whenever I want to use that rig, the beacon goes off. I am working on a dedicated transmitter and I made a 1/4 wave groundplane antenna, although I haven't put it up yet. Listen for it, probably won't be too strong as it's only 5 watts to a non-resonant (though very long) wire dipole, but if the band is open between your station and mine, you should at least be able to see it on a waterfall. If it seems like the band should be open (hearing activity on 10 meters is a good indication of that, as would be hearing my beacon!), start calling. Hopefully, if a few of us check out the band, some contacts can be logged. The digital subband is 24.920-24.930. -Joe, N8FQ
Re: [digitalradio] Satellite QSOs anyone ?
AO-7 and VO-52 can be used for digital modes, and they are quite easy to work. AO-7: 432.125-432.175 uplink, 145.975-145.925 downlink VO-52: 435.220-435.280 uplink, 145.930-145.870 downlink I am able to work both of them with great ease with my horizontal yagis on an azimuth-only rotor, and an in-shack preamp. I once successfully uplinked to AO-7 with 5 watts and a 2m/70cm colinear vertical, VO-52 would have worked even better. I'm available during the evening and early morning hours if you want to set up a sked. I tried to hook up with Tony KT2Q a month or so ago but it didn't work out. -Joe, N8FQ On Sat, 26 May 2007 18:32:31 -0400 Andrew O'Brien [EMAIL PROTECTED] wrote: Thanks, good audio clip, What about birds that do digital modes ? Andy
Re: [digitalradio] 6m psk31
50.290. I've been calling on and off all week and have yet to make a QSO. -Joe, N8FQ On Fri, 11 May 2007 14:04:34 -0500 Chris [EMAIL PROTECTED] wrote: Guys Gals, What would be the 6m psk31 frequency in the US? Thanks--- Bob C. (WU9Q)
Re: [digitalradio] New Digitalradio interactive spotting/sked webpage
I have added a bit of code that calculates the distance and bearing between you and another user, based on your grid squares. As before, hovering over a callsign yields this info. Worth noting is that the distance will be displayed in miles if you have a US or British call, and kilometers for other prefixes. Are there any other countries out there that mainly use miles to measure distance? Anyway, unless any more bugs are uncovered I think it's pretty much done. -Joe, N8FQ On Wed, 25 Apr 2007 22:31:31 -0400 Connect to http://www.electroblog.com:8090/drsked/drsked.php
Re: [digitalradio] Stealing the N0UK/Ping Jockey Central Idea ? Need programmer
I know enough PHP to be dangerous, so if no one else wants the job, I could hack together a similar page some evening if needed. -Joe, N8FQ On Wed, 25 Apr 2007 07:39:05 -0400 Andrew O'Brien [EMAIL PROTECTED] wrote: If anyone has the requisite programming skills to create something akin to what Chris has created, I would be happy to host it and promote it via the email group.
Re: [digitalradio] Stealing the N0UK/Ping Jockey Central Idea ? Need programmer
Here's what I have after hacking at it on and off for the last 2 hours or so: http://www.electroblog.com:8090/drsked/drsked.php The user list is not implemented yet, and there are a few things I want to change (click on a call pops up a user bio window, rather than having all that info on the line), but it should be usable as it is. -Joe, N8FQ On Wed, 25 Apr 2007 09:47:55 -0400 Andrew O'Brien [EMAIL PROTECTED] wrote: Thanks Joe , feel free to go ahead. On 4/25/07, Joe Veldhuis [EMAIL PROTECTED] wrote: I know enough PHP to be dangerous, so if no one else wants the job, I could hack together a similar page some evening if needed. -Joe, N8FQ On Wed, 25 Apr 2007 07:39:05 -0400 Andrew O'Brien [EMAIL PROTECTED] andrewobrie%40gmail.com wrote: If anyone has the requisite programming skills to create something akin to what Chris has created, I would be happy to host it and promote it via the email group. -- Andy K3UK Skype Me : callto://andyobrien73 www.obriensweb.com
Re: [digitalradio] Stealing the N0UK/Ping Jockey Central Idea ? Need programmer
Probably better to put it on your site (once it's finished of course). The ad says it supports PHP, so that's most of what it requires right there. Make a text file with a .php extension, containing the following line: ?php phpinfo(); ? Upload it to you host and then open it in your browser. Two bits of info on the resulting page are important: 1. the version of PHP, mainly if it's version 4.x or 5.x (my dev box runs 5.x, but I think the script will run on 4.x) 2. whether or not DBA support is enabled. It needs to be for the script to work as it is written (it uses the Berkeley DB lib, specifically version 4.2) Given that, it should be deployable without much effort. -Joe, N8FQ On Wed, 25 Apr 2007 16:09:36 -0400 Andrew O'Brien [EMAIL PROTECTED] wrote: Joe, This is amazing, well done! It works very well. Do you want to keep it at your site or do you eventually want to shift it to my domain? Either is OK with me. If we need to transfer to mine, I'll need to make sure that whatever magic you used is supported by my hosting company.
Re: [digitalradio] Re: Stealing the N0UK/Ping Jockey Central Idea ? Need programmer
This is caused by a problem with your cookie from the site. It would be helpful to see the contents of the cookie from anyone who is having this problem. -Joe, N8FQ On Thu, 26 Apr 2007 01:30:34 - cesco12342000 [EMAIL PROTECTED] wrote: What do you mean? Warning: stristr() [function.stristr]: Empty delimiter. in /var/www/ htdocs/drsked/drsked.php on line 84 Would love to have the php source ...
Re: [digitalradio] What is this digital mode?
Harmonic from a jammer on 6160. -Joe, N8FQ On Mon, 23 Apr 2007 01:11:52 - n4bwr [EMAIL PROTECTED] wrote: I heard this on 18460. I got a recording of it, which you can hear at http://blakenet.myftp.org/18460.wav. It sounds like water running, and it looks really odd on a waterfall.
Re: [digitalradio] Odd tones on 20M
Sounds like JT65 to me... -Joe, N8FQ On Wed, 28 Mar 2007 00:20:25 - Andrew O'Brien [EMAIL PROTECTED] wrote: Anyone care to identify this signal http://www.obriensweb.com/signal.mp3 Sounds throb-like but not exactly. Heard tonight on 14076 USB. Andy K3Uk
Re: [digitalradio] Can anyone identify this mode (jpg posted)
Pactor 1 ARQ. -Joe, N8FQ On Sat, 24 Mar 2007 22:12:33 - David Kruh [EMAIL PROTECTED] wrote: http://www.bambinomusical.com/screenshot1.jpg This signal was on 7068 Saturday afternoon ET. It is a pulsing signal that I cannot identify. Thanks for your help, group. David WB2HTO
Re: [digitalradio] IICOM IC-735
An Icom 735 is being used at the Holland ARC club station, and it is definitely good enough for PSK31 and the other modes. It has CI-V as well, so apps with rig control features will work with it. One note: if you use the ACC-1 jack for your soundcard interface, disconnect the mic when working digital, as both the front-panel mic and the ACC jack are live when transmitting. -Joe, N8FQ On Sun, 21 Jan 2007 22:41:28 - k5yfw [EMAIL PROTECTED] wrote: Is anyone using an ICOM IC-735 on PSK31/63/125? Is it stable enough to support BSPK and QPSK? Tnx, Walt/K5YFW
Re: [digitalradio] Re: Pictures for Dec 15?
320x256 takes about 4 minutes on MFSK16. 160x128 is more reasonable. -Joe, N8FQ Bill McLaughlin wrote: I believe 320x256 is the standard ... anything over 400x300 will not make use of the slant and shift corrections. Again I am not sure but think it can go as large as 1600x1200 but not recommendedIt also might well depend on the MFSK software one is using. 73 Bill N9DSJ --- In digitalradio@yahoogroups.com, Joe Ivey [EMAIL PROTECTED] wrote: I think it is 160 X !20 Joe W4JSI
[digitalradio] Narrowband image contest this weekend?
I've been thinking about this for quite awhile now, so I'm wondering what everyone else would think about a mini-contest this weekend using narrow image modes, like MFSK16 pix or MultiPSK's Run mode. Seems like a good way to take our minds off the privileges we've lost, and celebrate one that we have gained. Here's what I propose: Start: Friday 0501z (the moment the RO goes into effect) End: Monday 0501z Modes: MFSK16 analog image, MultiPSK Run digital image Bands: 160, 80, 40, 20, 15, 10, 6 (note that it's already legal on the former and latter bands) Exchange: Name and an image Scoring: 1 point per contact. Each mode counts as a separate contact. Class: Single station/single operator only. Maximum power 50 watts. Send logs to me in ADIF, Cabrillo, Excel, OpenOffice or CSV format. I'll send the winner (that is, the one who made the most contacts) an 8.5x11 certificate. Anyone else think this would be a good idea? -Joe, N8FQ Connect to telnet://cluster.dynalias.org a single node spotting/alert system dedicated to digital and CW QSOs. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [digitalradio] 1000 Hz Olivia under USA new rules ?
In my opinion, this is absolutely WRONG. I have said this here before, it all comes down to what is considered data. The new restrictions only cover content type D, which is Data, telemetry or telecommand. It does *NOT* include type B, which is telegraphy for automatic reception. It is already established that RTTY is content type B in common use. Therefore, the same type of traffic being sent with a mode like Olivia, MT63, Pactor-III, etc. must be considered type B as well, the modulation scheme is irrelevant to that. My interpretation, which is as good as any at this point, is that telegraphy is plain text to be read and interpreted by a human operator on the spot, whereas data is information (including plain text) which was or is intended to be stored as a file or interpreted by a computer. Thus: Keyboard-to-keyboard QSO: Telegraphy (J2B) Automated exchange of QSO information: Data (J2D) MultiPSK's Reed-Solomon mode ID feature: Data (J2D) Loading and sending a text file: Data (J2D) Manually delivering/forwarding NTS traffic: Telegraphy (J2B) Automatically forwarding NTS traffic: Data (J2D) Forwarding mail: Data (J2D) Reading mail: Data (J2D) (it was stored in a file on the BBS) Sending a PDF/ODF/etc: Data (J2D) Sending a JPG/PNG/etc: Image/Fax (J2C) Sending a MNG/animated GIF/etc: Television (J2F) So, if you're simply having a keyboard-to-keyboard QSO, a 1 or 2 kHz-wide mode is legal. As an aside, as long as you don't send any text (other than the Pic: statement), the MFSK16 image mode is legal to use in the phone bands right now. Though it does send a little incidental digital text, consider the VIS codes in wide SSTV, and the QSO data burst that MMSSTV sends. No one has ever lost their ticket over that... -Joe, N8FQ Andrew O'Brien wrote: When I read the rules a few weeks ago I did not think too much about them, if I am reading this correctly...some sub-modes of Olivia , MT63, and Dominoex would not be legal ?? Andy K3UK
Re: [digitalradio] Recent regulation changes in USA
Wide SSTV isn't affected by this, it can still be run in the phone bands
as it is now. The 500 Hz limitation keeps it out of the digital bands.
Anyway, despite the majority interpretation, I still don't think that
the new rules will in fact eliminate the ability to run 500 Hz digital
text modes. That all rests on what exactly is considered emission type
F2D. Most seem to believe that this includes all of the digital text
modes, but I don't think so.
According to the ITU web site (you don't get more canonical than that),
content type 'D' is Data transmission, telemetry, [and] telecommand.
Type 'B' (which isn't on the restricted list) is Telegraphy - for
automatic reception. So, it all comes down to what is or is not
considered data.
It is already established that RTTY is {F,J}2B. My interpretation is
that data refers to information to be stored in a file on a computer
(including plain text format), and telegraphy is information (pure
text only, no images or binary files) intended to be read on the spot by
the recipient. BBSes are most likely in the business of handling data,
so the mail handling stuff will be subject to the restriction no matter
what mode they use. However, if you're just going keyboard-to-keyboard,
2 KHz Pactor III counts as 'telegraphy' and thus is legal.
Cliff's notes: If you're going keyboard-to-keyboard, 1 KHz Olivia, MT63,
Q15X25, Pactor III, et al. are mode J2*B*, and thus legal. I, for one,
intend to keep using them until Riley himself tells me not to.
-Joe, KD8ATU
Roger J. Buffington wrote:
Do the recent FCC reg changes affect our ability to use 1Khz Olivia or
SSTV?
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
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[digitalradio] Throb-X character set?
Well, I gave up trying to implement Contestia/RTTYM in Fldigi. Dave W1HKJ says he plans to rewrite the Olivia modem from scratch at some point, during which it should be easier to implement them than to try and hack Pawel Jalocha's mind-bogglingly complex reference code. Anyway, Dave recently implemented a Throb modem in Fldigi, and I want to implement support for Throb-X. This seems simple enough to do, as far as I can tell, the only differences between the two modes are that the tones are spaced slightly closer together in Throb-X than in regular Throb, and that Throb-X has a larger character set due to it's use of 2 additional tones. Unfortunately, I haven't been able to find a character table for Throb-X. Does anyone have this info handy, or know where I can get it? Google has failed me. -Joe, KD8ATU Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [digitalradio] Revised FCC rules for data/image communication
KV9U wrote: Nevertheless, our Part 97 rules do not now authorize amateur stations to transmit both image and data emission types on any HF frequency segments, I am probably misunderstanding something, but I had thought that we could transmit both image and data and voice throughout the 160 meter band. It is not necessarily meeting the band plans, but I had thought the FCC rules permitted it. 160 meters is MF, not HF. Hopefully, others will have a lot more understanding than I have on what it is they are permitting on the data portions of the bands which to me means anything that is not the phone section. If I understand it, they will allow both analog and digital image in the non-phone areas, but only if they are narrow bandwith or under 500 Hz? Correct. Else the digital bands could be filled with wide SSTV, leaving no room for RTTY, PSK31 and the like. Just look at the havoc that 2KC-wide Pactor 3 signals are wreaking already. Despite the paranoid rants posted earlier, the intent of this rule change, as I understand it, is merely to allow US hams to use the analog image feature of MFSK16 (which is no wider than the digital text mode, just 316 Hz); to solidify the legal status of Feldhell, considered by some interpretations to be an image mode, either analog or digital depending on how you look at it; and permit future experimentation with similar modes. -Joe, KD8ATU Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [digitalradio] 40M DV bandplan
At this moment I am on 7296 LSB if you want to try it. -Joe, KD8ATU Tony wrote: Andy, Are you still on 7238 (LSB)? I'm QRV as of 02:40z. Anyone for DV??? Tony KT2Q Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [digitalradio] Re: Implementing Contestia/RTTYM, could use some advice
Patrick only gave an outline of the differences between Olivia and the derivative modes. What I am looking for is some pointers on the actual task of modifying the templates to implement those differences. I tried implementing RTTYM by changing the BitsPerCharacter and scrambling code/shift parameters in Pawel Jalocha's reference code (and then passing the output through a BaudotASCII routine), but that was apparantly not enough, since I don't get any output from the demodulator. -Joe, KD8ATU jhaynesatalumni wrote: I haven't looked yet, but you might look in the MultiPSK documentation, since Patrick recently implemented those modes in his program and may have written them up. Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[digitalradio] Implementing Contestia/RTTYM, could use some advice
Hello list. I have been trying to implement support for the Contestia and RTTYM modes in a fairly new digimode app, fldigi (www.w1hkj.com). It currently has an Olivia modem which is pretty much taken verbatim from Pawel Jalocha's reference code. So far, I have had very little luck getting it to work, mainly because I don't completely understand what is happening in Pawel's code. (and neither does Dave W1HKJ, the app's lead developer, and he's a much better programmer than I am!) So, for anyone who has had any experience with this, could you lend a few pointers? -Joe, KD8ATU Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
