[digitalradio] AX.25 parameters in MixW 2.19
I have received the email below from Yann Voumard. If you are able to assist him, particularly with specific answers to his questions about the AX.25 parameters I am sure he would appreciate it. Please respond to him DIRECTLY at: yann.voum...@epfl.ch He is not a member of this group. Scott/K6IX -- My name is Yann Voumard and I am an employee at the EPFL Space Center (space.epfl.ch) in Lausanne, Switzerland. In order to decode the downlink of our satellite (swisscube.epfl.ch), we use MixW 2.19. I have found your email address in the help file. I have read the manual but I am not a qualified radio amateur, so I have a few questions on a specific topic. If you could answer some of them, it would be much appreciated. We use the AX.25 protocol and my concerns are about the parameter tab of the settings box (Mode Mode settings… Parameters). I would like to know if these settings impact only the transmission or also the decoding. Could I have a short description of the fields “MaxFrame” and “PacLen”? By default, the value of “PacLen” is 100 and our satellite is configured with a maximal size for the I-Field of 256. Could that impacts the decoding? http://www.obriensweb.com/digispotter.html Chat, Skeds, and spots all in one (resize to suit)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: digitalradio-dig...@yahoogroups.com digitalradio-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: digitalradio-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [digitalradio] Super narrow filter: PSK31 with HB9DRV SDR-RADIO
Hi Andy, Here is a MixW/TS2000 macro that will center the selected signal and then reduce the TS2000 bandwidth to about 100 cycles (lines beginning with a semicolon are comments and can be removed). ; move RX to 1000 (center of filter bandwidth) ALIGN:1000 ; move TX to same place JUMPTOTXFQ ; turn packet filter bandwidth ON (menu 50A) CATCMD:EX05001001; ; set low DSP filter to narrow CATCMD:SL01; ; set high DSP filter to 170 Hz CATCMD:SH00; Then full RX bandwidth can be restored with this macro. ; set Packet Filter (menu 50A) OFF CATCMD:EX05001000; ; set low cutoff to 100 Hz CATCMD:SL02; ; set high cutoff to 2600 Hz CATCMD:SH06; Having to use the Packet Filter to do this is weird but it was the only way I could find to get the filter down to 100 Hz with CAT. It does cut monster signals down to virtually no interference. Scott/K6IX Andy obrien wrote: Finally! When I bought my TS-2000 a couple of years ago, I was aware of one criticism for the digital operator super narrow filtering in SSB was not as easy to achieve as in other rigs. . I have yet to try this when there is a monster signal nearby that needs to be nulled out , but I think the results will be good. Andy K3UK
Re: [digitalradio] OT WEB HOSTING QUESTION
I've used Fat Cow for a couple of years with no problems. I think they have a few site builder options but I've never tried one. Scott ( k6ix.net ) Bert Morton wrote: I am looking for suggestions for a reliable and reasonable web hosting company to host a simple website for me. It would have to include a site builder option as well. Thanks, Bert W1DFU Announce your digital presence via our Interactive Sked Pages at http://www.obriensweb.com/sked Recommended digital mode software: Winwarbler, FLDIGI, DM780, or Multipsk Logging Software: DXKeeper or Ham Radio Deluxe. Yahoo! Groups Links
Re: [digitalradio] Re: An open letter: W1AW and 80m psk31 interference
Like almost all large organizations with professional management, the ARRL has become devoted entirely to the perpetuation of itself. Paid public relations people write glowing statements expounding the dedication of the group to egalitarian principals, but to properly evaluate their motives you have to look at their actions, not their words. The ARRL is not dedicated to the benefit of Ham Radio, it is dedicated to the benefit of the ARRL. Scott Hill/K6IX W4AGA wrote: Setting aside the misplaced sense of entitlement in that letter, there's this from http://www.arrl.org/news/features/2001/08/07/1/
[digitalradio] Icom 701 question
Good evening to everyone out their - I have an Icom 701 HF rig that I am trying to get up and working on packet, SSTV. my set-up-up is a little different as far as what I am trying to do though, I have a rigblaster plug-and-play for the FT-8800 that I am working on interfacing with the Icom LOL - now I have the pin-out of the rigblaster, and of the Icom mic. circuit - should be a pretty easy process, but for some reason, it is just not working - the only thing I can get is the audio out of the radio to the computer. On the computer end, I run AGW in place of the more traditional hardware TNC, Winpack, MMSSTV, and Mix-w The Icom does have an accessory plug on the back of it - and I have the pin-out on that, and the only input I can see if for RTTY - with this work as a general input for other digital modes? I don't know - I am still really new to the HF world. If anyone would love me to send them the pin-out's for everything, and you can take a look, and let me know what needs to be connected to what - I can send you all the info. Thanks, Scott, W7SOT
RE: [digitalradio] Re: Airmail
Thanks gary, that is just what I was looking for - that will keep my buy for a while, getting all the stuff changed around LOL Scott, WSOT From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of Chuck Mayfield Sent: Monday, May 11, 2009 11:55 AM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] Re: Airmail Or, Scott, try Google with airmail agwpe there are many links to answer your question several ways. 73, Chuck AA5J Gary wrote: Scott, Take a look here. Question #3015 http://www.winlink.org/faq http://www.winlink.org/faq 73, Gary N7XOO --- In digitalradio@yahoogroups.com mailto:digitalradio%40yahoogroups.com, Scott firebug...@... wrote: OK, got a question here - and hopefully someone can point me in the right direction. I am using the AGW Packet Engine and Winpack for me packet radio operation - that is all working great. Now, I would like to add airmail into the mix - I have been told time and time again that you cannot use airmail with AGW, that you have to have an actual TNC - BUT I found the info on how to do that online about 2 years ago, and it worked great, unfortunately stupid me, I didn't save them or they got deleted, anyway they are gone, and I really would like to get that working here on my laptop. So if any of you have any idea how to do it, would you please let me know, or point to me where I can figure it out? I don't have much time online to search for stuff like that right now or I would sit down and start searching again. Thanks for any help, and if you need any more info, please let me know. Scott, W7SOT
[digitalradio] Airmail
OK, got a question here - and hopefully someone can point me in the right direction. I am using the AGW Packet Engine and Winpack for me packet radio operation - that is all working great. Now, I would like to add airmail into the mix - I have been told time and time again that you cannot use airmail with AGW, that you have to have an actual TNC - BUT I found the info on how to do that online about 2 years ago, and it worked great, unfortunately stupid me, I didn't save them or they got deleted, anyway they are gone, and I really would like to get that working here on my laptop. So if any of you have any idea how to do it, would you please let me know, or point to me where I can figure it out? I don't have much time online to search for stuff like that right now or I would sit down and start searching again. Thanks for any help, and if you need any more info, please let me know. Scott, W7SOT
RE: [digitalradio] The usual OS Flame war thread....
I second the motion For the record I use Linux Windows, each has strengths and weaknesses. Scott Gillis N3UJJ http://n3ujj.com/hamshack.html My Hamshack http://location.n3ujj.com/ My Current Location http://weather.n3ujj.com/ My Amateur Weather Station Most folks are about as happy as they make up their minds to be. ~Abraham Lincoln~ 482955 From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of Per Sent: Thursday, April 02, 2009 10:29 To: digitalradio@yahoogroups.com Subject: [digitalradio] The usual OS Flame war thread These threads just do not end. Pse just use what you like and stop bad mouthing all the other systems. I only use linux but I'm not going to tell you that windows and macs suck, if you like any of those then good for you. Have some fun on the air instead. 73 de Per, sm0rwo _ From: José A. Amador ama...@electrica.cujae.edu.cu To: digitalradio@yahoogroups.com Sent: Thursday, April 2, 2009 4:18:22 PM Subject: Re: [digitalradio] PSKMail Windows server? Once upon a time, in a very distant galaxy, there was an ace pilot named Anakin Skywalker... Linux has not been very successful here in the U.S. with most ham computer users. But it just has not been very practical at this point because like so many things in life, the trade-offs are too great:( Because too many refuse to think?? VI Conferencia Internacional de Energía Renovable, Ahorro de Energía y Educación Energética 9 - 12 de Junio 2009, Palacio de las Convenciones ...Por una cultura energética sustentable www.ciercuba. com image001.gif
Re: [digitalradio] PSK 10 Years On....
Andy, if you don't get a copy somewhere else send me an email with your snail mail address, and I will send you the issue. Scott/K6IX Andrew O'Brien wrote: I hate to admit this, but I forgot to renew my ARRL membership and have missed the latest QRZ Magazine. I am told that the latest edition has an article marking the 10th anniversary of Stve Ford's article about PSK31. I remember that article very well, I also remember building my first interface and getting active on PSK with G3PLX's software. What a 10 years it has been on the soundcard digital modes ! Andy K3UK
[digitalradio] Re: illinoisdigital group
I think that Yahoo has done the right thing, and I find it hard to believe that Mark says that he had no warnings. Myself as well as many others sent emails to Mark asking him to stop, he choose not to reply to any eMails (to myself or others) Marks actions were consistent with a spammer (ignoring replies, as well as requests to stop), this was NOT abuse by one of his members, but abuse from the moderator of the group himself (who should know better). When Mark ignored all the eMails asking him to stop, myself (and others) forwarded our complaints and ignored eMails to Yahoo (which I'm sure was able to see that he got) How can he say he got no warning? Didn't he think that ignoring everyone's requests to stop would escalate to Yahoo? (Sorry if this is a dup, but my first reply via eMail never showed up)
[digitalradio] Re: illinoisdigital group
Rick, I think we have reached the point of beating a dead horse (so to speak) But for the record, Mark never had the courtesy or respect, to reply to a single person. And most likely ignored Yahoo's eMails also. I see that he removed all references to illinoisdigital group from his QRZ profile about 10 days ago. Scott Gillis (N3UJJ)
RE: [digitalradio] illinoisdigital group
Rick, I know for a fact that several members of this group (including myself) complained directly to Mark about his REPEATED invitations (which he ignored) so the complaints were forwarded to Yahoo. Scott Gillis N3UJJ http://n3ujj.com/hamshack.html My Hamshack http://location.n3ujj.com/ My Current Location http://weather.n3ujj.com/ My Amateur Weather Station Most folks are about as happy as they make up their minds to be. ~Abraham Lincoln~ From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of Rick W Sent: Monday, February 23, 2009 09:07 To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] illinoisdigital group If it is true that Yahoo will just stop a group based on complaints, then that is very troubling as it could happen to any group with malicious activities by certain individuals making false claims. However, he indicated that he had no warning from Yahoo. As owner of another group that had Mark's posts at times, which were repeated on various groups, the material he was presenting was not spam that I saw, but directly associated with amateur radio, usually digital radio. If you are referring to sending information to an individual to join a group, is that spam when it is related to their interest area? I have sent messages to specific individuals to join the HFDEC group when I felt that they would be the type of hams who would find that of value. I admit that Mark was a major promoter of his specific digital interests, but we each have our specific interests. 73, Rick, KV9U moderator, HFDEC (Hams for Disaster and Emergency Communications) James R. Gorr wrote: Maybe it was because of all the spam requests sent to join their group.
RE: [digitalradio] illinoisdigitalham?
I think they shut him down for spamming other groups with his invitations. It was really annoying. Scott Gillis N3UJJ http://n3ujj.com/hamshack.html My Hamshack http://location.n3ujj.com/ My Current Location http://weather.n3ujj.com/ My Amateur Weather Station Most folks are about as happy as they make up their minds to be. ~Abraham Lincoln~ From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of expeditionradio Sent: Wednesday, February 18, 2009 20:55 To: digitalradio@yahoogroups.com Subject: [digitalradio] illinoisdigitalham? Anyone know what happened to illinoisdigitalham? Bonnie KQ6XA
Re: [digitalradio] Re: Fwd: [mixw] Major Changes?
History.txt file in program folder lists changes. Several changes to the log file display, new xceivers supported, etc. Scott/K6IX Andrew O'Brien wrote: -Anyone notice any major changes? Seems about the same to me. Andy K3UK Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked
Re: [digitalradio] Emergency agencies/ ham equipment/ hams in emcomm
Thank you Andy. Now you better duck. You have maligned the sacred cow of ham radio. Scott/K6IX Andrew O'Brien wrote: FYI, my hospital OWNS the ham equipment deployed at the facility. ARES/RACES provides operators but we retain ownership of anything we paid for out of Govt grants. I insisted on it , as a hospital official, since I know how fickle some hams organizations can be. Despite many clearly wonderful stories about how radio amateurs have helped in emergency situations, I agree with Simon's earlier thoughts. I think that much of the hams in emcomms is a scam , or a way for hams to play firefighter/cop/medic without actually having to be one.The scam is the spreading of the concept that us hams sit around all days looking for that ship's SOS or waiting for Skywarn to be activated.Ham radio is a communications hobby that has a SMALL amount of it;s constituency that play emcomm,. The vast majority DX, talk about recent surgery on 75M, contest, and decode strange squealing noises on 14077. Andy K3UK
[digitalradio] Re: DM780 : SSTV teaser
Andy, I love DM780 and think Simon can go ahead and release the analog SSTV now from what I saw on his site! I've given up on MixW, which I have had a registered copy of for about 5 years. MixW just released a new beta the past day or so but it appears to be minor changes. DM780 however beats MixW by leaps and bounds...and its only in beta! 73--Scott KN3A --- In digitalradio@yahoogroups.com, Andrew O'Brien [EMAIL PROTECTED] wrote: Check http://forums.ham-radio.ch/showthread.php?t=9592 for some screen shots of the upcoming SSTV inclusion in DM780. -- Andy K3UK www.obriensweb.com (QSL via N2RJ)
[digitalradio] Re: Packet Radio Frequencies
Ahhh, the old days300 baud HF packet. I remember when it was all the rage in the early 1990s. Now, VHF packet (1200 baud) was much more interesting and I even had a packet BBS. That was in eastern PA. Now I live in Pittsburgh and can find no VHF packet activity whatsoever. To the O.P. - look for some packet in your area around 145.01, 145.03, 145.05, 145.07, 145.09 - that might have changed over the years too but thats where it used to be! 73-Scott KN3A --- In digitalradio@yahoogroups.com, Andrew O'Brien [EMAIL PROTECTED] wrote: FYI, here is some traffic I just copied on 14095 [FBB-7.00g-ABFHM$] FA B G8MNY WW TECH 40474_GB7CIP 6084 F 55 [FBB-7.00g-ABFHM$] FA B G8MNY WW TECH 40474_GB7CIP 6084 F 55 FBB-7.00g-ABFHM$] FA B G8MNY WW TECH 40474_GB7CIP 6084 F 55 It looks like BBS forwarding using the FBB software. Andy K3UK On Dec 25, 2007 2:32 PM, Andrew O'Brien [EMAIL PROTECTED] wrote: Packet can be easily found on 30M, the APRS stations on 10151 use packet. . Try also 14095 for packet BBS traffic . on HF it is 300 baud packet (below 10M) Andy K3UK On Dec 25, 2007 1:31 PM, kaboona [EMAIL PROTECTED] wrote: Hello all and Merry Christmas. I just recently discovered packet radio. The fact that it exists in VHF makes it interesting to me. Now, I understand that it also exists in HF. I use two of the Kenwood radios that have a TNC built in for this purpose and a signalink interface for the HF rig at home. The difficulty I am having now is the finding of frequencies commonly used for packet. Where can I find such a list if one exists? Can anyone point me in the right direction? thanks in advance Jim -- Andy K3UK www.obriensweb.com (QSL via N2RJ) -- Andy K3UK www.obriensweb.com (QSL via N2RJ)
[digitalradio] Re: JT65A
When monitoring JT65A I decoded CQ N4WO EL88 1 and 0 What is the 1 and zero? Also what is the meaning of the # and * I see in the decoded lines? Dan Hi Dan and fellow JT65 fans You ask a very good question as understanding the meaning of these symbols is at the heart of digging deep into the noise to work the DX. Here's an example decoded sequence for reference: time sync Db DT DF W 002400 6 -23 2.5 223 23 * CQ VE7TIL CN89 1 0 The first few indicators WSJT provides labels and are easy to understand. The * and # indicate whether the message is a call type message like the CQ above or something like DX1AA VE7TIL CN89... Now if DX1AA responds to me with VE7TIL DX1AA FB00 OOO then his message will be decoded with the mysterious # indicated. The # tells you the sync is reversed to indicate OOO! If you get a good sync on a message but not enough signal to decode it then you can still tell what your QSO partner is trying to send and know to keep trying! This is critical on EME where everything is marginal. Pay close attention the next time you're on the air and you'll see this in action and all will be self evident... The 1 and 0 indicate 'which' decoder has decoded the message and as we'll see how confident the decoder is it got a good decode. The 1 above indicates the Reed Soloman decoder decoded the message and is 100% sure of its contents. Now if the message was corrupted by noise and QSB then you may see something like: 002400 6 -29 2.5 223 23 * CQ VE7TIL CN89 0 5 Note the Db level... The above indicates the the Reed Soloman decoder failed (the first number changed to 0) and that the DEEP SEARCH decoder has a 50% (the range is given from 0-10) certainly the message was copied correctly. In practice and my experience, if you see this then the message is almost certainly correct. Infact, a ? will start to appear at really low confidence levels to indicate to the operator to suspect the decode and attempt another before accepting it. OR let it average up to a positive Reed Soloman decode over a few sequences. The deep search decoder works by taking the callsign AND grid in the user input boxes on the left lower side of the screen and comparing the received data with that of the call3.txt database on your hard drive. If there is a match a result like above is displayed and a confidence level given. Therefore, you must actively maintain your call3.txt file and use the Radio to: and Grid: boxes... Having gone this far lets talk about the average decoder... You'll have likely noticed the 'little' window below the main decoder window. This is the average window. There are two rows for 1st and 2nd period decodes to average up if you take my meaning. Each time a sequence is decoded and if there was enough of a sync as set by the user, the message will be added to the average buffer. If you manage the buffer (using clear aveage, include and exclude) actively you can pull VERY weak signals out of the ether that would have never been decoded on a single decode try and some may not be even visible on the waterfall!!! I have worked many an EME single yagi station using this technique. This is also where the # sign comes into practical use again. If you decode this in the average window and nothing in the normal window: 002400 1 7/10 VE7TIL DX1AA FB00 1 0 Now look closely in the normal decode window and see if there is a # in the normal decode window then you know he's sending OOO your report and has copied both calls!!! There could be no decoded text in the normal window so understanding this is giving you a great advantage during weak signal trys! Finally the 7/10 in the average example above indicates that 10 seq where averaged and only 7 where meet the required sync level to be included in the average buffer. Again actively managing the average buffers is critical to working the weak ones... I hope this answers your question Dan and you get so practical use out of this :-) 73 Scott VE7TIL CN89lg PS - I hope everyone sees that JT65 is not as automated as it first appears, it really does require a skilled operator who understands the software's capabilities and has the insight and skill to use them.
Re: [digitalradio] Re: Bad PSK signals ?
them, like a certain kt4* who doesn't seem capable of ever turning his amp off. - Rich Ive done it with several ops also. 1 has said thanks, most say F you :D. And ya the KT4 doesnt seem to understand PSK31 is just fine without running full gallon ... and sounding like crap. Don't pick lemons. See all the new 2007 cars at Yahoo! Autos. http://autos.yahoo.com/new_cars.html
Re: [digitalradio] Re: 3580kHz-3600kHz Freq Coordination Info
Bonnie KQ6XA With that attitude Bonnie you have now revealed your real coordination. We WINLINK will Take what ever we want and the rest can just STFU ... That about sum it up ? Looking for earth-friendly autos? Browse Top Cars by Green Rating at Yahoo! Autos' Green Center. http://autos.yahoo.com/green_center/
Re: [digitalradio] 3580kHz-3600kHz Freq Coordination Info
The only Coodination I see is WINLINK trying to grab all the available Frequencies Food fight? Enjoy some healthy debate in the Yahoo! Answers Food Drink QA. http://answers.yahoo.com/dir/?link=listsid=396545367
Re: [digitalradio] Your first ever PSK31 QSO?
N3JHO is the first official I can find. 28Dec99 on 14070 at 2300Z Scotty W7PSK __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
[digitalradio] W9AV W3LL W7ZR
RUDE RTTY OPS DESTROYING QSOs on PSK Im going to post a HALL OF SHAME of these ops. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: [digitalradio] Regional communications ?
160, 80, 40 meters with almost any kind of wire/dipole antenna. We have a weekly regional net in the Sierra foothills in California on 80 meters, and never fail to copy everyone on the net. Scott/K6IX Andrew O'Brien wrote: My entry in to amateur radio was via 10 meters and the quest for DX, I had no real interest in local communication. Over the years I have had hams ask me to help them set-up their stations for digital mode operation and have occasionally resorted to the lower bands in attempt to help them. Often my attempts to communicate with hams in a 10-50 mile radius has failed. During darkness, I skip over them, and during the day-light we can't hear each other. I know 10 and 20 meter daylight propagation characteristics like the back of my hand, but have no clue about what is normal for 80 and 40M . It seems odd to me that I would have to rely on 2M repeaters to talk to regional hams. What do others on this list do for regional communications on HF? It would seem to me that the digital modes would be ideal for regional use but whenever I get a chance to get someone brave enough to leave 2M chatting alone and try a digital mode on HF, I can't work 'em to help them get set-up. I am familiar with NVIS antennae but do not have a particular NVIS installation, I do not have real estate for 160M either. So what bands and regular antennas do you use for this ?
Re: [digitalradio] SSB mixed with Mixw output?
I just downloaded a trial of MixW and there was nothing disturbing the audio. I do NOT think it is because of MixW being a trial version. Scott/K6IX Chuck Mayfield - AA5J wrote: Brett Owen Rees VK2TMG wrote: Hi Chuck, The attachment worked ok here for me. The sound seems to be saying 'trial' in a female voice. It sounds like a piece of applications software or your driver is doing this. Have you tried killing off processes using task manager to see if you can isolate what is causing it? 73, Brett -- === Brett Rees VK2TMG http://lisp.homeunix.net http://lisp.homeunix.net Brett, I think it must be encoded in the Trial software somewhere. I hope it will not say Full every four seconds if I buy the Full version. Hmm? What software does everyone use for digital? 73, Chuck AA5J DX Cluster telnet://cluster.dynalias.org Suggested Calling/Beaconing Frequencies: All frequencies are USB and assume a centre audio frequency of 1000Hz (e.g radio dial at 14.077.4 and 1000Hz on your waterfall = 14078.4) 20M: Primary : 14.078.4 Secondary: 14.076.4 30MPrimary: 10.142 Secondary 10.144 80MPrimary : 3583 Secondary: 3584.5 Yahoo! Groups Links
Re: [digitalradio] AGC and PSK31
Andy and the group, A thousand and one apologies. I can't even claim a senior moment. In my rush to a knee jerk reaction I misread AGC as ALC and RF gain as RF power.. Duuuh! So, this EHam article is talking about receiving, not transmitting. Now the statement makes sense. The same is true of voice SSB. The only voice I work is a local net on 80 meters. If I don't turn down the RF gain I can't copy the conversation at all. Since I normally use only Digital or CW I keep the AGC turned off. This writer (in EHam) has a good point, and one to consider when you get a bad IMD report from someone. If your signal is very strong into his receiver you might want to ask him to turn down his RF gain and take another reading. Scott/K6IX Andrew O'Brien wrote: On 9/17/06, Scott Hill [EMAIL PROTECTED] wrote: Where did you see that statement Andy? The thing to turn down until you have no AGC is the audio drive from the soundcard, NOT the RF gain. Nothing wrong with turning down the RF gain if you want to run lower power, but that will not get rid of splatter caused by the AGC. Scott/K6IX In an article on PSK at Eham... RE: The Good Bad and Ugly on PSK31 by AA4PB on December 12, 2005 It's the AGC in the receiver that can cause distortion of strong signals just like ALC in the transmitter can. A fast AGC action will follow the amplitude of the PSK31 signal and attempt to level it out - that is distortion. A slow AGC action cannot react fast enough to follow the signal and so will just maintain an average without distorting the signal. Turning down the RF gain will reduce the signal below the level that causes any (or much) AGC action. Always use your slowest AGC setting. PSK31 has amplitude changes. Any non-linearity anywhere in the system from the transmitter input to the receiver output will cause distortion which results in poor IMD readings and wide signals. This can be the result of ALC or AGC action or overdriving an amplifier anywhere in the system. I've done a considerable amount of testing to look at this issue. On an IC761 with the AGC set to fast I could have as much as 10dB of IMD caused by the AGC with an S-9 signal strength. I measured the output of my test transmitter an knew that I was transmitting a clean test signal. Switching the AGC to slow, reducing the RF gain to weaken the signal, or reducing the signal strength to S2 or S3 would clean up the signal. For transmit ALC testing I used a K2 because I could easily change component values inside the transmitter. I found that with some ALC action I could actually see a copy of the PSK31 signal on the ALC line and of course the IMD reading at the receiver was poor. By changing the ALC decay time (adding a capacitor) the waveform on the ALC line went away and the IMD improved considerably. I found that with the proper selection of decay time the ALC could be used to level the average transmitter output without distorting the PSK31 signal. The time constants for most of our receiver AGC and transmitter ALC were designed for typical voice signal rather than PSK31. 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 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] AGC and PSK31
On both of my receivers (ICOM 736 and Kenwood TS-2000), with AGC off, reducing the RF gain has almost exactly the same effect as reducing the soundcard receive level. My reading of the article is that turning down the RF gain will reduce the distortion on a strong signal caused by either the AGC or any other receiver source. I don't see that it implies the reappearance of weaker signals. I do know that with CW you can sometimes reduce the noise some without reducing the CW signal by reducing the RF gain. Other times reducing the RF gain just reduces both the noise and the signal by the same amount. I think that what you want to do, reduce a strong signal only, has to come before the RF Gain in the signal processing chain. I'm not smart enough to know where the AGC fits into the chain. In MixW if you notch a strong signal it seems to bring the weak signals back a tiny bit, but not much. Obviously the MixW notch is at the very end of the signal processing chain, to late to help the weak signals much. Scott/K6IX Andrew O'Brien wrote: Thanks Jose and Scott. So, my original question was related to my observations were that lowering RF gain on my receiver did range of the waterfall. Apparently this is related to AGC circuitry being activated . On my radio the disappearance of weaker signals from the waterfall when a very strong stations is received., does not get improved by turning down the RF gain. I am making an assumption that the improvement reported as a result of turning down the RF gain, would lead to the lost weaker signals reappearing on the waterfall. My tests this weekend were not able to replicate this. 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] AGC and PSK31
Where did you see that statement Andy? The thing to turn down until you have no AGC is the audio drive from the soundcard, NOT the RF gain. Nothing wrong with turning down the RF gain if you want to run lower power, but that will not get rid of splatter caused by the AGC. Scott/K6IX Andrew O'Brien wrote: Turning down the RF gain will reduce the signal below the level that causes any (or much) AGC action. Always use your slowest AGC setting. Can someone explain this statement? In my radio, with only an AGC FAST/SLOW option, reducing the RF gain appeared to may no difference in reducing the impact of a strong signal and AGC action. 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] unzip stops at 2 percent
Google on download manager and find a program which will monitor the download and restart it if necessary without going clear back to the beginning. I used the one from Netscape until I got DSL. Almost all of them are free. Scott Hill, K6IX doc wrote: after a two hour plus dial up download,[logger32 2,7] I attempted to unzip it, and each timeit wouldstop at 2 percent, any suggestions on how to get it to %100?? tnx ron wa5fbf 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 Visit your group "digitalradio" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [digitalradio] PSK31 and Rascal Box
Some of the RS232 adapters are not powered and cannot get the right signal levelss. Ive been reading up on those and found that Just ordering the one from Bux com is compatible in price and works perfect on my laptop.kg4bir59 [EMAIL PROTECTED] wrote: I'm trying to switch my digital operations from the home desktop to my laptop. In order to do this I had to order a USB to Serial adapter for my laptop. Now that I have that I cannot transmit for some reason. Receive seems to be fine just can't transmit. Any advice/help? Thanks and 73, Dave KG4BIR Yahoo! Mail Bring photos to life! New PhotoMail makes sharing a breeze. 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) SPONSORED LINKS Ham radio Craft hobby Hobby and craft supply YAHOO! GROUPS LINKS Visit your group "digitalradio" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [digitalradio] TenTec Triton IV on Digital Modes?
I have tried this with a Triton IV and a Corsair.
They do an acceptable job if they would stay put on the frequency. I found drift
to be a problem so I quit using themand just use an ICOM 706 radio and my
SGC-2020. Theyhave much better stability.
Scott Holland
NT4P/AFA2AS
Lowell, NC
- Original Message -
From:
kd4e
To: digitalradio@yahoogroups.com
Sent: Thursday, January 12, 2006 4:17
PM
Subject: [digitalradio] TenTec Triton IV
on Digital Modes?
I may be acquiring a used TenTec Triton IV.Anyone
using one of these for digital modes, includingSSTV, Pactor, PSK31,
etc?Is the relay switching a show-stopper or can that bereplaced
with a solid state relay?I recognize that 100% of the processing would
be doneexternal to the rig and just audio in, audio out, andptt done
at the rig.WDYT?--
~~Thanks!
73, doc
kd4e
|_|___|_|
| | |
|
{| /\
{| / \
{| / \
{| / @ \
{| | |~_||
| -| | |\ # http://bibleseven.com/kd4e.html
KD4E =West
Central
Florida~~~
Need a Digital mode QSO? Connect to 66.24.213.216
Other areas of interest:
The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/
DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion)
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Re: [digitalradio] FYI: RESTRUCTURING: UK GETS NEW BANDPLANS IN 2006
Seems like I see most RTTY on 14.080 - 14.090. Not much above that except contests. Scott, K6IX F.R. Ashley wrote: On 20 meters automated data stations are given from 14.089 to 14.099 and 14.101 to 14.112 MHz depending on the signals actual spectrum used by the signal. Yup, just what we need. Good job UK, ruin the RTTY freqs. Where will it all end? WB4M Buddy Yahoo! Groups Sponsor ~-- Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/ELTolB/TM ~- Need a Digital mode QSO? Connect to telnet://208.15.25.196/ Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ Looking for digital mode software? Check the quick commerical free link below http://www.obriensweb.com/digimodes.html Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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] Olivia user warned off 14105.5 !
My take is that the frequencies are NOT guaranteed by the FCC Period. And if an Active QSO is in progress, and the Auto op interferes with that QSO its called Jamming and subject to fines PERIOD. John Becker [EMAIL PROTECTED] wrote: At 09:58 PM 11/21/05, you wrote: I wonder if it may be the 105 net that operates HF packet under full automatic operation. They have been there for many years and so they start to think they have a right to the frequency. No. that last time I check into their network it was still keyboard to keyboard. There was a BBS there for leaving messages. But it did not do any forwarding like the Pactor' systems do. Yahoo! FareChase - Search multiple travel sites in one click. Need a Digital mode QSO? Connect to telnet://208.15.25.196/ Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ Looking for digital mode software? This group suggests you try either : http://www.mixw.net MIWX (many modes) http://f6cte.free.fr MultiPSK (many modes) http://www.dxlab.com DXLAB (logging, PSK31/63 and more) http://www.qsl.net/hamscope Hamscope (many modes) http://http://xoomer.virgilio.it/aporcino/Chip64 Chip64 http://www.digipan.net/Digipan Digipan (PSK31 and PSK63 http://www.kc4elo.com/ Logger32 (logging, PSK31/63 and RTTY) YAHOO! GROUPS LINKS Visit your group "digitalradio" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [digitalradio] New MixW reflector
worked fine for me. Scott, K6IX Danny Douglas wrote: Hmmmthe url comes up in ie with an address about:blank and just sits there with a blank page. Danny - Original Message - From: Andrew J. O'Brien To: digitalradio@yahoogroups.com Sent: Sunday, November 13, 2005 12:31 PM Subject: [digitalradio] New MixW reflector I have started a new reflector to discuss all matters related to the multimode software MixW. You can subscribe via [EMAIL PROTECTED] I used to co-moderator the main MixW a few years ago. That group does a good job but is too fussy about what is posted and tightly restricts what it considers to be relevant MixW discussion. So, I have created an alternative . Please consider joining it. Andy K3UK *The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ *The MixW Multimode Reflector : http://groups.yahoo.com/group/themixwgroup/ -- YAHOO! GROUPS LINKS a.. Visit your group digitalradio on the web. b.. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.13.0/167 - Release Date: 11/11/2005 Yahoo! Groups Sponsor ~-- Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/ELTolB/TM ~- Need a Digital mode QSO? Connect to telnet://208.15.25.196/ Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ Looking for digital mode software? This group suggests you try either : MixW, Multipsk, DX Lab (suite), Hamscope, Chip64, MMVARI,or Logger32 (RTTY and PSK). Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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] Wanted, CHEAP !!!! USB-RS232 adapter - Or another Solution
Want to go portable PSK with my Laptop and have a Rascal KIT RS232 interface for PSK. Anyone know of A CHEAP (AKA XYL radar invisible) USB-RS232 adapter that works (IE Providing the KEYING through RS232 I have now ) Or is there another route I can take? Scotty N7HJ __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ More info at http:///www.obriensweb.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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] Help with IC706MKIIG and Digipan
I am looking for someone using this combination to give me some help. The interface I am using is the Saratoga EZ PSK USB and my laptop is running Windows XP PRO. The issue I am having is that the TX audio sounds terrible. Its not even close to a clean PSK31 signal. I have tried the TX Drive settings in Digipan and I have also adjusted the RF gain and MIC gain on the radio itself. Any suggestions?? Thanks...K6SUD Piece of Cake. here is what I tell People over the air and I approximate the dial depending on the radio. But, we both have the same so it will be simpler. I found this to be the best way to get a clean RR track sig. Turn Sound all the way down. Turn the mic gain to 4 (Submenu). Turn RF Power to 4 (submenu). Turn COMPRESSION OFF (many forget this) Select ALC on your out meter (SW menu sel ALC/PO/SWR) Hit TX. Adjust your Sound out slider until ALC just kicks the 1st LCD Bar. Your good to go. Scotty N7HJ Select ALC on your meter __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ More info at http:///www.obriensweb.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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] No Messages
Hi John. Sorry to see the trouble you are having with Yahoo. Those people are not very helpful (if there are any people there). When I clicked on the link you sent out I got an error message which said You are not a moderator. Just on the wild chance that you guys had missed it, this is exactly the behavior you get when you go: ManagementMessagesPostingArchives(edit)Archives Options and click on the Moderator radio button. I know you are an experienced moderator, but Yahoo makes it very difficult and confusing to find and set all the options. Scott Hill, K6IX John Becker wrote: Jerry that is the problem there is no link on the left to go to the message page. for those that are having a problem try going direct after logging in. http://groups.yahoo.com/group/digitalradio/messages John, WØJAB co-moderator The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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] unsubscribe
__ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/ The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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: MFJ 1278 Manual Software
The MFJ software is really bad so dont even bother with it. Any phone modem software including hyper terminal in Windows will work fine. The older 16 bit versions of Logger allow you to enter your own custom commands in the micro's and as MFJ used different command names you can get Logger to work just fine with the 1278. More than likely you will need to calibrate it. Download the manual and visit the sites noted on doing this. I use MMTTY as a calibration source for the TX and RX tones by using a null modem audio cable between a sound card interface and the TNC. RX connected to TX times two on each device. With everything calibrated between the two computers and modems you can talk between them using the audio null modem setup when you have everything correct. It saves going on the air and all the hooking up to transceivers just to test and calibrate the TNC. --- obrienaj [EMAIL PROTECTED] wrote: --- In digitalradio@yahoogroups.com, Joseph Flynn [EMAIL PROTECTED] wrote: Good Morning I just acquired a MFJ 1278 and now am in need of more information on it. If you have any suggestions or information please let me know. Thanks 73's Joe Check these links http://www.mods.dk/downloadmanual.php?File=MFJ-1278B_Manual_ (All_versions).pdf http://www.mfjenterprises.com/man/pdf/MFJ-1289WD.pdf (software will work with 1278) http://www.eham.net/reviews/detail/3522 (some basic info) Maybe the 1270 manual will help a little http://www.mfjenterprises.com/man/pdf/MFJ-1270C.pdf also check http://www.rys.nl/mfj1278b.html __ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/ The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ a href=http://dxcluster.blogspot.com;img src=http://feeds.feedburner.com/DigitalSpotter.gif; height=67 width=200 style=border:0 alt=Digital Spotter//a Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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:TNCs
I wrote an article on my digital setup a few months back on eham.net. http://www.eham.net/articles/8616 . This setup incorporates my old PK-232MBX, a HAL ST-6000 Terminal Unit, and a sound card modem. This allows access to all digital modes with the notable exception of propriety modes of G-tor, Clover, and Pactor II/III which I think should be limited to commercial, non-amateur frequency's. Amateur radio public frequency's should be just that with open-source only digital modes so that anyone can use these modes without the need of propriety hardware or licenses. Please note that an expensive Terminal Unit like the HAL ST-6000 is not required for a performance boost of the PK-232 TNC. I hooked up an old and very cheap ($5) AEA CP-1 TU to a PK-232 for a friend with excellent results. Doing this results in a PK-232 with 170 Hz filtering on the received audio without the need of going into the TNC and changing out resistors and re-calibrating it and using direct FSK keying allows 170 Hz shifting on the transmit as well. Building the audio interface allows including your sound card setup as well so you have the best of all digital worlds, software and hardware modes. PK-232 TNC's have gotten rather cheap in the last few years. Typically you can but one for less money than a commercial made sound card interface, which astounds me! Here you have a self-contained computer, modems, and audio filters costing less than two simple passive audio and PTT circuits in a box! As for the frequency readout difference between stations running two different shifts of 170 and 200, you just must remember that the stations are splitting the slight difference so neither ones Mark frequency will be exactly the same. The Mark frequency of the 170 Hz station will be 15 Hz higher and the Space frequency will be 15 Hz lower than the 200 Hz station. When done this way 99% of the time this will work out fine for both stations. --- Mark Miller [EMAIL PROTECTED] wrote: At 07:00 PM 3/5/2005, you wrote: Do I understand this right that the sound card programs don't care what the freq of the tones are, just as long as the shift is right? Yes, that is correct. 73, Mark N5RFX __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ a href=http://dxcluster.blogspot.com;img src=http://feeds.feedburner.com/DigitalSpotter.gif; height=67 width=200 style=border:0 alt=Digital Spotter//a Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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] BPL-Busting Modes/Techniques Needed to Mitigate Interference
I already have my BPL buster up and running right now. It's called a 10-meter beacon! You will only need a Tech plus license at a minimum and no coronation requirements to put up a low power slow speed CW signal with a basic dipole antenna, a very cheap AM CB radio, and some way to key the PTT switch on and off corresponding to the beacon ID and location information. Here is a very good article on building one of these beacon stations. http://www.4sqrp.com/resource/10m_beacon/10m_beacon.htm In this project a Norcal Keyer Kit was used but I went exceedingly cheap and easy here. I used a very slow motor drive used to rotate a circuit board disk with traces removed to correspond to my beacons call and location. The rotating disk keys the old CB very nicely. It's also easy to make a new disk at any time. It has been found that only a 2-watt 10-meter CW signal into a vertical located within 100 feet of an unshielded power line will induce enough RF on the power line to prevent BPL from operating properly for several miles. You might not think that a few watts would do it but in reality it is more than enough. Part 15 devices are limited to fractions of a watt. After I installed my Beacon I drove around my neighborhood and found my signal to be very strong under the power lines several miles away. At 3 miles I could not pick up my signal due to trees and houses but stopping under a power line my beacon signal could be picked up clearly on my mobile 10-meter transceiver and a 1/4-wave mobile whip antenna proving that my 10-meter beacon and it's vertical dipole had coupled to the power line located 60 feet away. --- expeditionradio [EMAIL PROTECTED] wrote: BPL-Busting Modes/Techniques Needed to Mitigate Harmful Interference to Amateur Radio Service Undoubtedly, BPL systems operating in the ham bands cause interference to most of the analog and digital modes we presently use for amateur radio communications. Our main modes: SSB, FM, CW, SSTV, RTTY, PSK31, Pactor, and AM are vulnerable to most of the types of BPL signal interference. Unfortunately, common receiver noise-blanking and DNR techniques are inadequate to cancel the ugly BPL pulsating and multi-carrier signals. The Amateur Radio Service is, in essence, being forced to adopt some form of BPL-mitigation technology. The development of new amateur modes, semi-automated and automated frequency agile systems, advanced ARQ, and various sorts of FEC digital techniques could be a possible avenue for amateurs to communicate through the interference caused by BPL. It may not be possible to entirely eliminate the harmful interference BPL creates, but we need to start planning for it. We need to research and characterize the various types of BPL signals so that we can design modulation and control techniques to compensate for them. Using radio engineering and digital signal processing, we may be able to develop BPL-Busting Modes. These new modes and systems could carry any combination of voice/image/text/data. Frequency hopping, spread spectrum, wideband OFDM, multi-PSK, ALE, and MFSK are mode/systems that we could implement immediately in new formats... but we need the freedom within the FCC rules to advance some of these. Freedom that we don't have yet in USA. Under FCC current Amateur Radio Service rules, we do not have the freedom we need to take advantage of some of the most useful technologies that could help us to communicate through BPL interference. We are locked in a technology prison. Hopefully, in the near future, we will have more freedom... with bandwidth-based spectrum management. Bonnie KQ6XA ,, __ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ a href=http://dxcluster.blogspot.com;img src=http://feeds.feedburner.com/DigitalSpotter.gif; height=67 width=200 style=border:0 alt=Digital Spotter//a Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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:TNCs
I have several TNC's and oh no, several terminal units as well. I also have a sound card setup in the mix of digital equipment. You can't do ARQ modes with a sound card except for HFTerm which required Linux and as it locks the OS from running any other programs you might as well run Terman93 (AN-93) from a dos boot disk and save the harassment of loading another OS on your hard drive. A TNC is cheap these days even on Ebay and you can hook it up right along side the sound card interface. If you're going to do RTTY contesting a good terminal unit is the only way to go. They have active filters for both mark and space tones and limiter circuits so you can turn off the AGC so a strong signal in the band pass of your transceiver wont make the weaker signal disappear that your trying to copy. I have my HAL ST-6000 hooked up to the external modem port of my PK-232MBX, which allows my new, USB only computer to work fine with Windows and Windows only contesting software. Oh! I even own a spark gap transmitter! It's a hoot to setup and operate at a Hamfest without an antenna hooked up to one of the ice picks that form the gap. It makes a nice 1/2-inch blue spark, pop, and smell! --- Danny Douglas [EMAIL PROTECTED] wrote: I still have not one but two, neither of which is hooked up at the moment, and havent been for the past several years. Why bother with them, when we have perfectly good computer soundboards they do the job. Someday, I may get into a situation where I dont have internet capability, and will have to revert back to packet, but dont see the future of that. The question arises: Who still has a spark gap transmitter? I never had one, as by the time I came around (most everyone here I suspect) their time had come and gone.Some few of us still have a crystal (only) rig around too, and some of them even work and get exercised every year or so. Its fun the revert back and use the old stuff now and again, including the virbroplex and straight keys, but wouldnt turn things around for them being full time, for all the tea in China. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 266.1.0 - Release Date: 2/18/2005 __ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ a href=http://dxcluster.blogspot.com;img src=http://feeds.feedburner.com/DigitalSpotter.gif; height=67 width=200 style=border:0 alt=Digital Spotter//a Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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] RTTY Ops are RUDE
--- John Geiger [EMAIL PROTECTED] wrote: If no one is using one of the PSK frequencies at the time, then it is perfectly legitimite for a RTTY operator to start CQing there, and it is actually rude for a PSK op to suggest that the RTTY op should leave, since he was there first. You run into this kind of thing all the time with SSB contests and nets. 73s John NE0P Problem is they are Jumping right on top of PSK QSO's and Blasting away thier CQ TEST CQ TEST. Its very RUDE PERIOD. I think any contest SSB, CW, RTTY or what ever there should be coordinators of sometype that monitor this. If any Op is caught his score goes away. Would preclude this nonsense. And before you say he might not hear, that poppy. If I can hear him 20+ over when I unkey and he cant hear me then he needs a reciever check. Scotty N7HJ __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ Discussion Forums at http://www.obriensweb.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * 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/
