Re: [digitalradio] Digital Voice update #2 - programmers wanted - codec2 and the G3PLX modem
--- On Sat, 28/8/10, Kristoff Bonne wrote: > I do not understand why -say- the IARU does not does this. I'm not > say they should endorce any "standard" of any technology. Unfortunately it would require a volunteer willing to put in a lot of hard work to do. Volunteers are always in short supply. One existing source of info is http://www.arrl.org/technical-characteristics But this doesn't provide always provide detailed description of a mode, for instance you couldn't recreate Pactor-III from the information supplied there. Also I suspect it's not kept up to date with mode enhancements. 73 Trevor M5AKA
[digitalradio] Tokyo Ham Fair Videos
Videos of some of the new equipment at the Tokyo Ham Fair can be seen at http://www.southgatearc.org/news/august2010/tokyo_ham_fair.htm 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload At: http://www.southgatearc.org/news/your_news_1.htm
[digitalradio] AMSAT-UK Videos
This may be of interest for those interested in learning more about Amateur Satellites: Videos of the presentations given at the 25th AMSAT-UK International Space Colloquium, held July 31-August 1, are now available on the web. They can be viewed and downloaded at http://www.batc.tv/ Click on the 'Film Archive' icon and then select a 2010 AMSAT video. The presentation given by RSGB Microwave Manager Murray Niman G6JYB called "2010 AMSAT What's New" provides a good overview of the process involved in getting new Amateur and Amateur Satellite service allocations. Currently there are no global Primary Amateur bands between 146MHz and 24GHz. The full Colloquium schedule can be seen at http://www.uk.amsat.org/content/view/713/284/1/2/ AMSAT-UK publishes a colour A4 newsletter, OSCAR News, full of Amateur Satellite information. Join online https://secure.amsat.org.uk/subs_form/ Getting started on Amateur Radio Satellites PDF http://www.uk.amsat.org/content/view/408/168/ 73 Trevor M5AKA
[digitalradio] Webcast of AMSAT-UK Space Colloquium this Saturday/Sunday
The 2010 International Space Colloquium, the 25th held by AMSAT-UK, is taking place this weekend at the Holiday Inn, Guildford, GU2 7XZ, England. Watch the Colloquium live during this weekend July 31-Aug 1 at http://www.batc.tv/ - Click on Live Events Weekend Schedule - Times are GMT+1 http://www.uk.amsat.org/content/view/713/284/ AMSAT-UK publish a color A4 newsletter, OSCAR News, that is full of Amateur Satellite information. Join online at https://secure.amsat.org.uk/subs_form/ 73 Trevor M5AKA Daily Amateur Radio Email/RSS news: http://www.southgatearc.org/
Re: AW: AW: [digitalradio] Operating ROS In USA
--- On Tue, 20/7/10, KH6TY wrote: > The FCC has actually analyzed the mode (to my surprise!) Hi Skip, I know we've been round this loop before but I'd still like to see the report the FCC are alleged to have produced. If it does exist I'd have though a US citizen would be able to get it via a Freedom of Information Act request. http://www.fcc.gov/foia/ I know ARRL's Dan Henderson N1ND asked a couple of Amateurs about the mode and they thought it was SS but we don't know on what basis. Do you know if any US amateurs are raising a Petition for Rulemaking to move to regulation by bandwidth instead of mode ? Irrespective of what you think of the merits of one particular mode the current FCC regs are archaic with respect to digital modes and can only impede development. 73 Trevor M5AKA
[digitalradio] Where are our innovators?
We clearly need to encourage innovation in Amateur Radio. Many potential innovators may be people working in the fields of Software or Communications who are not currently Radio Amateurs. The question is what can we do to encourage people with expertise in these areas to join the Amateur Radio community ? I'd be interested in the thoughts of those on this list. While reading the article below I was stuck by the fact that an Amateur Radio Innovation Competition had only received one entry. This perhaps indicates that Amateur Radio innovators are in short supply at the moment! From: http://www.southgatearc.org/news/july2010/innovation_in_ar.htm The South African Amateur Radio Development Trust has thus far received one entry in the Innovation in Amateur Radio Competition from an Amateur in the UK. Radio amateurs and technologists are invited to submit projects that will innovate amateur radio whether it is software, amateur radio and the Internet, the development of compact HF antennas for flat and complex dwellers or innovation in Emergency Communications. 73 Trevor M5AKA
[digitalradio] UK Hellschreiber balloon launch Friday 1800 UT
Possibly the first balloon launch to carry Hellschreiber, see http://www.southgatearc.org/news/july2010/hellschreiber_balloon_launch.htm 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm
[digitalradio] HF/VHF PLT (BPL) Report
These devices transmit digital HF signals across the RF spectrum from 2-300 MHz. The interference from them can have a range of 1000 feet from the home they are installed in. PLT Radio Frequency Interference Report http://www.southgatearc.org/news/june2010/ofcom_plt_report.htm 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm
Re: [digitalradio] What is here Spread Spectrum and why and what is not?
--- On Wed, 2/6/10, KH6TY wrote: > The FCC engineers have performed the same spectral analysis and > informed the ARRL that the mode is truly spread spectrum. That's interesting, the FCC have said they they did not give judgments on individual data modes, it's up to the operator to decide. Who were the FCC engineers you mention, where is their report and who in ARRL HQ did they communicate with. 73 Trevor M5AKA
Re: [digitalradio] ROS MODEM OFFICIAL GROUP
--- On Wed, 2/6/10, Dave Sparks wrote: > Found the section. It is > 97.309(a)(4) of the code: > > http://www.arrl.org/technical-characteristics > > The reverse-engineering part is an inference on my part. No chance of reverse-engineering Pactor III from the information provided. 73 Trevor M5AKA
[digitalradio] HAM-MAG Article - Digital Sound Card Modes
A 7 page article on getting started with digital sound cards modes appears in the May 2010 issue of HAM-MAG P17 - Getting Started with Digital Sound Card Modes with the Yaesu FT817 Transceiver The May 2010 issue can be downloaded free from http://ham.france.free.fr/crbst_17.html 73 Trevor M5AKA
[digitalradio] Slow Scan TV Pictures from Space
The Radio Amateurs on the International Space Station (ISS) will be transmitting Slow Scan TV pictures on 145.800 MHz on Thursday and Friday May 13-14. The transmissions will take place in Robot-36 mode on Thursday May 13 from 10:00 - 17:00 UTC and on Friday May 14 from 12:45 - 16:00 UTC. Previous activations of the SSTV system have produced some good images that can be seen on the ARISS SSTV picture gallery site. The ISS puts out a strong signal on 145.800 MHz FM and a 2m handheld with a 1/4 wave groundplane antenna will be enough to receive it. The FM transmission uses 5 kHz deviation which is standard in much of the world. Many FM rigs in the UK can be switched been wide and narrow deviation FM filters so select the wider deviation. Handhelds all seem to have a single wide filter fitted as standard. Free PC sound card Slow Scan TV software such as MMSSTV can be used to display the pictures and you can use software such as the IZ8BLY Vox Recoder to save the audio for later decoding if you are away at work. Information on the MAI-75 SSTV experiment http://www.energia.ru/eng/iss/researches/education-26.html How to access the ISS Slow Scan TV http://www.marexmg.org/fileshtml/howtoitv.html Free Slow Scan TV Software MMSSTV uses your PCs Soundcard http://mmhamsoft.amateur-radio.ca/ IZ8BLY Vox Recoder, enables you to record the signals from the ISS on 145.800 MHz while you're away at work http://xoomer.alice.it/aporcino/VoxRecorder/ Simple Rig to PC Audio Interface http://www.southgatearc.org/articles/g0ftd/data_dummy_interface.htm ISS Real Time Tracking (tick draw footprint) http://www.n2yo.com/?s=25544 Amateur Radio on the International Space station (ARISS) SSTV picture gallery http://www.amsat.org/amsat/ariss/SSTV/ ISS Fan Club http://www.issfanclub.com/ AMSAT-UK http://www.uk.amsat.org/ publish a colour A4 newsletter, OSCAR News, that is full of Amateur Satellite information. Join online at https://secure.amsat.org.uk/subs_form ---- 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm
Re: [digitalradio] Opposing 60M proposal
Hi Steinar, I've never used WINLINK and know little about it but I'd imagine they use a standard and freely available compression algorithms. Perhaps someone else can comment. 73 Trevor M5AKA --- On Tue, 11/5/10, Steinar Aanesland wrote: > Is it posible to monitor the content of a WINLINK > transmission? > As fare as I know the WINLINK data is compressed. I have > never been able to monitor WINLINK with my SCS TNC. > > la5vna Steinar
Re: [digitalradio] Re: Opposing 60M proposal
The FCC Electronic Comment Filing System is at http://fjallfoss.fcc.gov/ecfs/ This loks like the one http://fjallfoss.fcc.gov/ecfs/proceeding/view?z=zcrgt&name=10-98 there's one comment already. 73 Trevor M5AKA
Re: [digitalradio] Opposing 60M proposal
The discussion regarding Pactor III has relevance to earlier discussions on this list concerning a new mode. Whether you like Pactor III or not it's clear the FCC permits US amateurs to use it and they regard the level of documention available on it to be adequate. I suspect the only concern of the FCC like other regulators regarding new modes is not the documentation but whether they can either buy a unit or freely download a software executable that enables them to monitor the content of the transmissions. 73 Trevor M5AKA --- On Tue, 11/5/10, Steinar Aanesland wrote: > > Hi Andy > > Are you allowed to use a proprietary mode on the HAM band > in US? In > Norway we are not. > > la5vna Steinar
[digitalradio] Live webstream of D-STAR CubeSat Presentation
The OUFTI-1 CubeSat will operate D-STAR and a presentation on the satellite by Questiaux Lo will take place Friday at 09:20 PST, 16:20 GMT, 17:20 BST (if I can convert times correctly) and can be watched at http://www.ustream.tv/channel/CubeSatWorkshop/v3 Full Presentation Schedule at http://cubesat.org/images/workshopschedule_final.pdf 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm
Re: [digitalradio] 3rd Generation Digital radio
--- On Tue, 20/4/10, "John Becker, WØJAB" wrote: > I can't think back this far. What > came first - > Packer or Amtor (ARQ mode to boot) . Good question Amtor was developed by G3PLX circa 1979/1980. The first issue of the TAPR Packet Status Report newsletter was July 1982, see http://www.ka9q.net/psr-1.pdf So I guess a form of packet must have been in use slightly earlier than that 73 Trevor M5AKA
Re: [digitalradio] 3rd Generation Digital radio
I'd say the 3rd generation has been available for several years now. Both Kenwood and ICOM manufacture VHF and UHF mobiles, handhelds and repeaters for the new standard. The key advantage is its spectrum efficiency. It supports both voice and data but uses 6.25 kHz channel spacing. D-STAR typically needs 10 kHz channel spacing. 2010 - NXDN™ Forum and dPMR MoU collaboration http://www.southgatearc.org/news/march2010/nxdn_dpmr_collaboration.htm 2009 - Guide to Digital PMR http://www.southgatearc.org/news/august2009/guide_to_digital_pmr.htm 2008 - Icom IC-F4029SDR Transceiver for Digital PMR 446 http://www.southgatearc.org/news/march2008/digital_pmr_446.htm 2008 - The Gadget Show tests digital and analog walkie talkies http://www.southgatearc.org/news/november2008/gadget_show_radio_tests.htm 2007 - Ofcom statement on Digital PMR-446 http://www.southgatearc.org/news/september2007/digital_pmr446.htm 73 Trevor M5AKA
[digitalradio] Live Video Streaming of Arecibo EME April 16-18
It is claimed the 432.045 MHz Moon Bounce signal from KP4AO, Arecibo, Puerto Rico, on April 16-18 will be so strong that it can be heard with just a small hand-held Yagi pointed at the moon. Live Video Streaming is at http://www.ustream.tv/channel/kp4ao-eme Arecibo on 432.045 MHz Moon Bounce (transmission times) http://www.southgatearc.org/news/april2010/arecibo_432_moonbounce.htm Arecibo Coverage Maps http://www.southgatearc.org/news/april2010/arecibo_coverage_maps.htm Arecibo Video Tours http://www.southgatearc.org/news/april2010/arecibo_video_tours.htm Satscape Tracking Software http://www.satscape.co.uk/ WSJT JT65B EME Software http://www.physics.princeton.edu/pulsar/K1JT/ UK Ham makes EME contact with just 25 watts http://www.southgatearc.org/news/january2008/record_eme_contact.htm 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm
[digitalradio] Solar Powered D-STAR Repeater
ON4BK's D-STAR repeater ON0CPS is possibly the first to operate entirely on solar energy ON0CPS operates in the Amateur Radio 70cm band with 439.5625 MHz output and 431.9625 MHz input. During the day there is usually enough sun to keep the repeater going and charge the two 120Ah batteries which power the repeater at night. So far the repeater has been running over a month on solar power alone. Source: Royal Union of Belgian Radio Amateurs (UBA) http://tinyurl.com/BelgiumUBA ON4BK website http://tinyurl.com/yyajoxx 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm
[digitalradio] Innovation in Amateur Radio + Satellite Digital Amateur TV
Innovation in Amateur Radio - an new exciting project http://www.southgatearc.org/news/april2010/innovation_in_amateur_radio.htm New flight opportunity for CubeSats http://www.southgatearc.org/news/april2010/cubesat_flight_opportunities.htm Columbus Module Update - Satellite Digital Amateur TV (DATV) http://www.southgatearc.org/news/april2010/ariss_columbus_update.htm 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm
[digitalradio] FCC - Spread Spectrum NPRM
Regarding Spread Spectrum Notice of Proposed Rule Making (NPRM) http://www.arrl.org/news/stories/2010/03/18/11396/?nc=1 It proposes to reduce some of the restrictions on Spread Spectrum but unfortunately does nothing about permitting the use at HF and VHF of SS modes that completely fit within the bandwidth of a phone signal (say 3 kHz on HF and 15 kHz on VHF). It says comments can be filed on or before 30 days after date of publication in the Federal Register. Instructions on how to file comments on the NPRM only are listed on pages 6-7 in the NPRM. http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-38A1.pdf Electronic Comment Filing System http://www.fcc.gov/cgb/ecfs/ 73 Trevor M5AKA
Re: [digitalradio] Re: Proposed 28th Amendment to the United States Constitution:
No sign of the original here either. YU7EF doesn't say which group he wants to be removed from out of the many Yahoo and Gmail groups he sent the email to. 73 Trevor M5AKA
Re: [digitalradio] SS definitions
--- On Wed, 10/3/10, KH6TY wrote: > Alan, though we may disagree as to the amount or nature of FHSS in ROS, > the bottom line is that the FCC engineers, as well as the ARRL engineers, > reviewed both the documentation and the signal footprint, and have > concluded it is FHSS. Who are these "FCC Engineers" ? All we've has is a response from someone that may be assumed to be an office clerk who simply quoted back the words in Part 97. 73 Trevor M5AKA
[digitalradio] Higher Data Rates - MIL-ST-188-110C
PowerPoint of a presentation 'Wideband HF Waveform Design for MIL-ST-188-110C' given by Eric Johnson at last months HFIA meeting is at http://www.hfindustry.com/meetings_presentations/presentation_materials/2010_feb_hfia/presentations/hfia02eej.pdf It outlines would could be achieved for HF groundwave comms using 256 QAM 3 kHz Bandwidth - 16000 bits per second 24 kHz Bandwidth - 12 bits per second Obviously the raw data rate for both waveforms is significantly higher due to error correction overheads. I was thinking a 120,000 bps rate would permit Amateurs to send Video in the 29 MHz and 50 MHz bands. Other HFIA PowerPoints at http://www.hfindustry.com/meetings_presentations/2010_feb_hfia.htm 73 Trevor M5AKA
Re: [digitalradio] 1976 FCC - Delete all Emission Types from Part 97
Thanks for the reply Skip. As you probably know the scenario is different over here with the regulations permitting bandwidth up to the size of the band, no emission type restriction, no mandatory band plans and complete freedom to develop your own modes with IDs given in whichever mode you are using. It is baffling at times trying to understand the situation in the States. I guess it has a lot to do with history and access to "phone bands" being determined by license class and of course various groups keen to protect their patch. New modes can appear and then disappear far too quickly for any formal regulation process to keep up with, Amateurs have to work out for themselves means of voluntarily sharing the spectrum. It does work outside the States. I'm sure within a few years someone will develop an efficient digital Voice mode (with license free Codec) that will exceed the performance of SSB on most paths, then we'll all be digital users and the strict divide between digital and phone will disappear. 73 Trevor M5AKA
[digitalradio] 1976 FCC - Delete all Emission Types from Part 97
Following the recent discussions about the US license restrictions I was looking through the archive of QST mags at www.arrl.org On April 22, 1976 the FCC introduced Docket 20777, the QST report (page June 1976) says "Rather than further complicate the present rules," the Commission said, "with additional provisions to accomodate the petitioners' requests, we are herein proposing to delete all references to specific emission types in Part 97 of the Rules. "We propose, instead," the Commission continued, "to replace the present provisions with limitations on the permissible bandwidth which an amateur signal may occupy in the various amateur frequency bands. Within the authorised limitations any emission would be permitted." It would seem that deletion of emission types from Part 97 is exactly what is needed now to permit experimentation. Perhaps the FCC should be asked to re-introduce Docket 20777 Trevor
Re: [digitalradio] Dominoex revisited
The link on the 2005 Southgate apge should now read: http://www.qsl.net/zl1bpu/MFSK/DEX.htm 73 Trevor M5AKA --- On Fri, 5/3/10, Trevor . wrote: > From: Trevor . > Subject: Re: [digitalradio] Dominoex revisited > To: digitalradio@yahoogroups.com > Date: Friday, 5 March, 2010, 13:23 > --- On Fri, 5/3/10, Andy obrien > > wrote: > > It has been a few years since > > Dominoex was added to our tool box. I > > still see it on the air from time to time but not > on > > a daily basis. > > I wonder why it is not used ? > > > > http://www.southgatearc.org/news/december2005/domino_ex.htm > > I wonder that myself, the mode has a lot going for it. > > BTW the link for original DominoEX download site in the > page above no longer works but Domino is supported in Fldigi > at > > http://www.w1hkj.com/Fldigi.html > > 73 Trevor M5AKA > > > > >
Re: [digitalradio] Re: ARRL/FCC Announcement about ROS
All the ARRL announcement really does is reference the FCC statement of Feb. 23. That statement said the FCC was not going to say if it considered ROS to be spread spectrum. Individual operators were the ones responsible for making a decision. The FCC has never said ROS is "illegal" nor have the ARRL. I've had a trawl through the FCC site but couldn't find a definition there of what they mean by the words "Spread Spectrum" and it's their definition that matters not other peoples. If the FCC were concerned about the use of ROS on HF you would have thought they would have written to at least one of the US stations that they had observed using it and informed them of a breach of regulations. I am not aware that they have done so. 73 Trevor M5AKA
Re: [digitalradio] Dominoex revisited
--- On Fri, 5/3/10, Andy obrien wrote: > It has been a few years since > Dominoex was added to our tool box. I > still see it on the air from time to time but not on > a daily basis. > I wonder why it is not used ? > > http://www.southgatearc.org/news/december2005/domino_ex.htm I wonder that myself, the mode has a lot going for it. BTW the link for original DominoEX download site in the page above no longer works but Domino is supported in Fldigi at http://www.w1hkj.com/Fldigi.html 73 Trevor M5AKA
Re: [digitalradio] Re: The FCC's definition of Spread Spectrum
--- On Fri, 26/2/10, DaveNF2G wrote: > File a federal lawsuit stating that the FCC's > "determination" that ROS is SS and therefore unlawful on HF > bands in the USA is arbitrary and capricious, based on the My interpretation from over on this side of the Atlantic is that the FCC DID NOT say ROS was unlawful on HF. In fact in the response at http://groups.yahoo.com/group/digitalradio/message/34812 they specifically do not state the Commissions View on ROS saying: "The Commission does not determine if a particular mode "truly" represents spread spectrum as it is defined in the rules." The sentence: "ROS" is viewed as "spread spectrum," and the creator of the system describes it as that. Is NOT giving the Commissions determination of the mode. They are simply noting what is said in the original "Request for clarification", which was basically some that Radio Amateurs view it as SS, hence the debate, and the author of the mode did indeed describe it as such. The FCC simply say it is up to the Operator to make a decision as to whether a mode is in breach of regulations. It is worth remembering that US Amateurs have been using CHIP64 on HF for 5 years, a long time. It is a Direct Sequence Spread Spectrum mode and described as such on the ARRL website. I am not aware of the FCC having had a problem with Amateur usage of that mode on HF. Out of curiosity what is the initial response of the FCC if an Amateur where to breach one of the regs ? Is it to sent them a letter informing them of the breach and asking them to desist ? Long term the solution looks like reform of the license regs but that may be easier said than done. It's over 32 years since the FCC itself first proposed band planning by bandwidth (their plan was for 350 Hz, 3.5 kHz, 7.5 kHz etc bandwidth segments) and 5 years since the ARRL submitted a similar proposal. Perhaps a 3rd attempt at changing introducing bandwidth planning will be successful ? I hope so. 73 Trevor M5AKA
Re: [digitalradio] FCC Technology Jail: ROS Dead on HF for USA Hams
--- On Mon, 22/2/10, expeditionradio wrote: > Several years ago, there was a proposal to FCC to provide > regulation by bandwidth rather than content. However, it > failed to be adopted, and ARRL's petition to limit bandwidth > was withdrawn And the irony is that in 1977 (33 years ago!) the FCC itself proposed band planning by bandwidth with segments for 350 Hz, 3.5 kHz and 7.5 kHz. At the time the ARRL bitterly opposed it and the FCC withdrew the proposal. However, there may be scope in interpretation of the regs. Up until a few years ago many US amateurs were under the impression that you could only send a maximum of 300 bits per second on HF. What the rules actually specified was a maximum symbol rate of 300 Baud and, probably because no had thought to do so, there was no limit specified on the number of carriers you could transmit. That's how these days US hams can run digital voice/sstv. So it's down to interpretation and it'll hinge on the FCC's formal definition of Spread Spectrum with luck ROS will fall outside of it. Does anybody plan to contact the FCC this morning to get their view ? 73 Trevor M5AKA
Re: [digitalradio] ROS 14.101 MHz
IARU Region 1 bandplan indicates 14.080 is for modes using less than 500 Hz B/W. Bandwidths up to 2700 Hz are permitted above 14.101 MHz. http://www.rsgb.org/spectrumforum/bandplans/rsgb_band_plan_2010.htm 73 Trevor M5AKA
[digitalradio] ISS SSTV Robot-36 Today 145.800 MHz
The International Space Station is transmitting Robot-36 SSTV on 145.800 MHz today between 0900-1400 UTC and mode PD-160 on Thursday and Friday >From http://ariss-sstv.blogspot.com/ Jan MAI-75 update A bit more info to share. The Wed (Jan 27) operations will be conducted using the VC-H1 in automatic mode which means Robot-36 mode images being transmitted once every 3 minutes on 145.80 MHz. This should occur worldwide during the time frame of 0900-1400 UTC. The operations on Thursday and Friday (Jan 28-29) will be in mode PD-160 using MMSSTV and will occur when the ISS is in proximity of western Russia. Further details on the ISS SSTV experiment at http://www.southgatearc.org/news/january2010/iss_sstv.htm 73 Trevor M5AKA Daily Amateur Radio News (Email/RSS): http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Use Form at: http://www.southgatearc.org/news/your_news_1.htm ---
[digitalradio] Space Station SSTV Jan 27-29 145.8 MHz
It looks like the Space Station Amateur Radio Slow Scan TV system on 145.800 MHz may be activated this Wednesday-Friday. ISS SSTV experiment http://www.southgatearc.org/news/january2010/iss_sstv.htm 73 Trevor M5AKA Daily Amateur Radio News (Email/RSS): http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Use The Form: http://www.southgatearc.org/news/your_news_1.htm ---
[digitalradio] HO-68 AX.25 Transponder
A new video about the new Amateur Satellite HO-68 (XW-1) contains a short clip of the AX.25 system in operation, see http://www.southgatearc.org/news/december2009/ho68_modes.htm HO-68 Real Time Tracking (tick draw footprint): http://www.n2yo.com/?s=36122 A beginners guide to getting started on Amateur Radio Satellites is at http://www.uk.amsat.org/content/view/408/168/ A Happy New Year to you all. Trevor M5AKA ---
[digitalradio] WINMOR in January Ham-Mag
The January issue of the free Amateur Radio magazine - Ham Mag - published today, has an article on WINMOR by Leon Singh 9Z4BM. You need to subscribe via http://www.Ham-Mag.com/ or join the Yahoo Group at http://fr.groups.yahoo.com/group/ham-mag_en/ A copy of the mag is in the Yahoo Files folder. 73 Trevor M5AKA Daily Amateur Radio News (Email/RSS): http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Via: http://www.southgatearc.org/news/your_news_1.htm
[digitalradio] AFSK packet on the XW-1 Amateur Satellite
On the AMSAT Bulletin Board Mineo Wakita JE9PEL reports that the AX.25 Packet BBS on XW-1 has been active, he writes: "AFSK packets were active yesterday over Japan, 12:55 UTC, 15 Dec 2009 Received by JA0CAW, 435.675MHz AFSK 1200bps" The 2m to 70cm FM transponder was also tested yesterday, see http://www.southgatearc.org/news/december2009/xw1_beacon_reports.htm No reports as yet on the SSB/CW linear transponder being tested. 73 Trevor M5AKA Daily Amateur Radio News Email or RSS: http://www.southgatearc.org/ Email Your News Items to: editor at southgatearc.org Or use the Form at: http://www.southgatearc.org/news/your_news.htm
Re: [digitalradio] cognitive radio systems;?
Good point Cortland. Cognitive radio offers national regulators the opportunity to adopt a much lighter touch to regulation. They could do away with rigid frequency allocations - the users radio will just look for an "unused" frequency and use it. As you say the problem lies in what is considered an occupied frequency. We may well find that a signal 10 db above the prevailing noise floor would be considered noise and thus available for use. On 2.4 GHz technologies such as Bluetooth and Wifi adapt to interference. I'm sure as cogitive techniques develop we'll see large chunks of the spectrum operated in a similar manner to 2.4 GHz, eg license exempt with the Equipment (users won't necessarily realize it's a radio) choosing the lowest interference frequencies to carry out the required task. European Union RSPG report on Cognitive Technologies http://www.southgatearc.org/news/november2009/rspg_report_on_cognitive_technologies.htm 73 Trevor M5AKA --- On Wed, 16/12/09, Cortland Richmond wrote: > I do hope cognitive radio designs > will be done responsibly for the spectrum > they occupy, and I cite RMS Express as an example of a > responsible approach > to mitigating interference. And (military) ALE as I've > experienced it as > the opposite. > > However, I fear device manufacturers wanting to use > spectrum everywhere > will not produce radios able to detect weak emissions when > their receiver > bandwidth is so wide as not to see it above the > noise. Among the BPL > comments and replies is one manufacturer's assertion that > there were no > signals to be interfered with -- when his spectrum analyzer > noise floor was > higher than the level those signals would normally > reach. By using only > measurement technology to required for Part 15 > certification, that > manufacturer was able to ignore signals I believe he "knew > or should have > known" (as the lawyers say) were or could be present. > > We must listen first. So should any responsible user of > shared spectrum. He > must be able to hear *any users authorized* in the spectrum > shared, at > levels and in bandwidths they are authorized to use. > This is not so easy, > considering that we often carry on Olivia or Contestia QSOs > below the > background noise level. It could be made > easier by restricting automatic > (cognitive) radio to spectrum where weak signal modes will > not be > encountered. > > Cortland > KA5S > > > > > [Original Message] > > From: Bob McGwier > > To: > > Date: 12/16/2009 12:54:35 AM > > Subject: Re: [digitalradio] cognitive radio systems;? > > > > Cortland Richmond wrote: > > > > > > > > > One problem with "cognitive radio" is that it > seems it will be designed > > > to detect only emissions similar to those it is > meant to receive. > > > Therefore, it is best used in spectrum > particularly allotted to > > > just those kinds of > emissions. This rather defeats the purpose > of > > > "white space." > > > > > > RMS Express by way of contrast has a busy > detector that will prevent > > > transmitting over many kinds of modulation > different than it uses. > > > Compare this with (say) ALE, whose polling > (encountered on MARS > > > frequencies) takes no account of voice or even > Olivia on channels it > > > happens to select. > > > > > > > > > Cortland > > > KA5S > > > > > > > > > > This is not correct in my experience. In all serious > systems under > > development, the CR is looking to characterize all > energy to some degree > > or another, irrespective of whether it is a "matched > filter" to a > > particular waveform. > > > > The purpose is to find a channel that works. > Energy on the channel is > > an indicator it would not as the source would be > cochannel interference > > and with some high degree of probability, the > interference would be > mutual. > > > > Dislike for any particular system which automates > channel usage but does > > not behave responsibly is not to be used to condemn > responsible digital > > system developers. The enforcement of this > responsibility is done by > > pressure (peer) and performance (being interfered with > by those not > > detected). > > > > Bob > > N4HY > > > > > > > Suggested frequencies for calling CQ with experimental > digital modes = > 3584,10147, 14074 USB on your dial plus 1000Hz on > waterfall. > > Announce your digital presence via our Interactive Sked > Pages at > http://www.obriensweb.com/sked > Yahoo! Groups Links > > > digitalradio-fullfeatu...@yahoogroups.com > > >
[digitalradio] XW-1 Launched
The Amateur Radio satellite XW-1 was launched this morning. As well as transponders for SSB/CW and FM working it also has an AX.25 packet BBS: PacSat BBS Uplink: 145.825 MHz AFSK 1200 BPS Downlink: 435.675 MHz AFSK 1200 BPS Currently only the telemetry beacon on 435.790 MHz CW has been activated. Further details at http://www.southgatearc.org/news/december2009/xw_1_launched.htm 73 Trevor M5AKA Daily Amateur Radio News Email or RSS: http://www.southgatearc.org/ Email Your News Items to: editor at southgatearc.org Or use the Form at: http://www.southgatearc.org/news/your_news.htm
[digitalradio] Digital Amateur Radio Satellites Launched
Four Amateur Radio Satellites were launched on Wednesday September 23. Three of them feature AX.25 Packet telemetry beacons, for details see http://www.southgatearc.org/news/september2009/successful_launch_of_amateur_radio_cubesats.htm 73 Trevor M5AKA Daily Amateur Radio Email/RSS news: http://www.southgatearc.org/
[digitalradio] Electronics Weekly - Bringing FUN back to the classroom
AMSAT-UK's FUNcube satellite project features on the front cover of the August 12-18 edition of Electronics Weekly magazine The printed edition of the magazine will be dropping through letterboxes during Wednesday morning. You can read the digital version of Electronics Weekly magazine online or download the pages in PDF format at http://cde.cerosmedia.com/1D4a803d8814a11352.cde The full FUNcube article titled 'Bringing FUN back to the classroom' by Steve Bush is on page 8 and contains an interview with Graham Shirville G3VZV. Electronics Weekly Magazine http://www.electronicsweekly.com/ AMSAT-UK http://www.uk.amsat.org/ publish a colour A4 newsletter, OSCAR News, full of satellite information. You can join online at https://secure.amsat.org.uk/subs_form/ 73 Trevor M5AKA
[digitalradio] AMSAT-UK Space Colloquium Videos
The videos of the presentations at this years successful AMSAT-UK International Space Colloquium in Guildford are now available to watch on the British Amateur Television Club (BATC) website Among the fascinating video presentations are: - Software Defined Radio (SDR) By Drew Glasbrenner KO4MA - FUNcube, the new AMSAT-UK linear transponder satellite project By Graham Shirville G3VZV - AMSAT-NA Update By Drew Glasbrenner KO4MA - AMSAT-DL Update By Peter Guelzow DB2OS - Electronics and Teddy Bears: A Near-Space Adventure" By Ed Moore M0TEK and Fergus Noble M0NBL, Cambridge University Spaceflight - Engineers Wanted! Tempting Teenagers to Explore Technology By Garry Bulmer, Software Architect All 18 videos can be seen at http://www.batc.tv/ Click on the "Film Archive" icon on the left to see all the videos available then select the video you wish to see (they start with 2009 AMSAT) To see the video full screen click on the icon at the bottom of the video player. PDFs of the slides from the presentations can be found on the AMSAT-UK website at http://www.uk.amsat.org/component/option,com_wrapper/Itemid,278/ Thanks to the BATC for recording and editing the videos (a time consuming job) as well providing this invaluable video service at batc.tv for the Amateur Satellite community. AMSAT-UK publish a colour A4 newsletter, OSCAR News, full of satellite information. You can join online at the new URL of https://secure.amsat.org.uk/subs_form/ AMSAT-UK http://www.uk.amsat.org/ 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/
[digitalradio] AMSAT-UK Presentations Available
PDF's of the presentations given at this years successful AMSAT-UK International Space Colloquium in Guildford are now available Among the weekend of fascinating presentations were Software Defined Radio reception of Satellite Signals by Drew Glasbrenner European Astronaut Selection and the Mars Pathfinder by ESA Astronaut Dr Andreas Mogense FUNcube, the new AMSAT-UK linear transponder satellite project by Graham Shirville Electronics and Teddy Bears: A Near-Space Adventure" by Ed Moore and Fergus Noble, Cambridge University Spaceflight Engineers Wanted! Tempting Teenagers to Explore Technology by Garry Bulmer, Software Architect The 18 presentations can be found on the AMSAT-UK website at http://www.uk.amsat.org/component/option,com_wrapper/Itemid,278/ AMSAT-UK publish a colour A4 newsletter, OSCAR News, full of satellite information. Join AMSAT-UK online at https://secure.amsat.org.uk/subscription/ 73 Trevor M5AKA AMSAT-UK http://www.uk.amsat.org/
[digitalradio] New FX.25 Protocol - Amateur Radio Satellite Experiment
ANDE due for deployment from the Space Shuttle tomorrow will experiment with the FX.25 protocol. Based on the 1980's AX.25 standard the new FX.25 features forward error correction. ANDE FX.25 Protocol Experiment https://goby.nrl.navy.mil/ANDE/Amateur_Radio.html Four Amateur Radio satellites are to be deployed from the Space Shuttle mission STS-127 on Thursday July 30 The satellites are ANDE Castor, ANDE Pollux, BEVO1 and AggieSat2. They will be deployed from the space shuttle Endeavour (STS-127) at 7:27 am CDT via the Space Shuttle Picosatellite Launcher (SSPL). You can follow AggieSat2 on Twitter at http://twitter.com/aggiesat2 ANDE Castor - 145.825 MHz FM transmits telemetry every 30 seconds https://goby.nrl.navy.mil/ANDE/Castor.html ANDE Pollux - 145.825 MHz FM transmits telemetry every 33 seconds https://goby.nrl.navy.mil/ANDE/Pollux.html BEVO1 (DragonSat 1) - 437.325 MHz FM, Morse Code at about 20 WPM http://www.utexas.edu/news/2009/06/09/picosatellite/ AggieSat2 (DragonSat 2) - 436.250 MHz http://209.85.229.132/search?q=cache:FMerJChhzs4J:aggiesat.org/+aggiesat&cd=1&hl=en&ct=clnk&gl=uk 73 Trevor M5AKA RSS Daily Radio News: http://www.southgatearc.org/ Daily News via Email: http://www.feedburner.com/fb/a/emailverifySubmit?feedId=2783644&loc=en_US Submit your news: http://www.southgatearc..org/news/your_news_1.htm or email editor at southgatearc.org
Re: [digitalradio] Re: Universal Shipborne Automatic Identification System (AIS) ?
Looks like AX.25 9600 packet by a different anme. Anyone know if the G3RUH modem decodes it ? 73 Trevor M5AKA
[digitalradio] Live Webcast - AMSAT-UK Colloquium Guildford, England
The AMSAT-UK International Space Colloquium takes place this Saturday and Sunday July 25/26 at the Holiday Inn Hotel in Guildford, England. The presentations will be webcast live at http://www.batc.tv/ The event opens at 1000 BST (0900 GMT) Saturday and some of the presentations may be of interest to those involved in digital communications. Colloquium Presentations http://www.uk.amsat.org/content/view/679/266/ Booking details http://www.uk.amsat.org/content/view/25/49/ Webcast http://www.batc..tv/ (select Live Events then AMSAT) There's also a Chat facility available - /nick “your callsign” - sets your ID, further details are at http://www.uk.amsat.org/content/view/695/68/ AMSAT-UK publish a colour A4 newsletter, OSCAR News, join online at https://secure.amsat.org.uk/subscription/ 73 Trevor M5AKA
[digitalradio] AO-51 Apollo 11 40th Anniversary Special Event
From: http://www.southgatearc.org/news/july2009/amsat_apollo11_event.htm AMSAT-NA will mark the 40th anniversary of the first manned lunar landing with a special event on AO-51. AO-51 will transmit a special message commemorating the event during evening passes on Monday, July 20 and into early July 21 UTC. The transmission on the 435.300 MHz FM downlink will include Robot 36 SSTV. Find out when AO-51 is in range via the N2YO Real-Time satellite Tracking website - http://www.n2yo.com/ Frequency ans QSL information at http://www.amsat.org/amsat-new/echo/CTNews.php 73 Trevor M5AKA Amateur Radio Daily Email/RSS News: http://www.southgatearc.org/
Re: [digitalradio] New 40m Band Plan
Hi Andy, The IARU Region 2 (Americas) bandplan gives digital as 7035-7043 as against the 7040-7050 for 500 Hz BW digimodes and 7050-7060 for 2700 Hz BW digimodes used in Region 1. It's unfortunate there is a difference between regions, lets hope they can work towards harmonisation. IARU Region 1 bandplan http://www.iaru-r1.org/index.php?option=com_content&view=article&id=175&Itemid=127 IARU Region 2 bandplan http://www.iaru-r2.org/wp-content/uploads/region-2-mf-hf-bandplan-e.pdf 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ --- On Sun, 19/7/09, Andrew O'Brien wrote: From: Andrew O'Brien Subject: Re: [digitalradio] New 40m Band Plan To: digitalradio@yahoogroups.com Date: Sunday, 19 July, 2009, 10:02 PM I did not know that, but have noticed less Europeans at 7035, Andy K3UK On Sun, Jul 19, 2009 at 4:10 PM, Andrew wrote: Has anyone noticed that the band plan for 40m has been changed. I for one had not seen it. It has changed the frequency for digi modes from the 7035 area up to 7040 to 7047. I still hear most stations around 7035 Link is below Andy LY/ES2DY
[digitalradio] Space Station Pictures
Some of the pictures of earth transmitted by the Amateur Radio Station onboard the International Space Station can be seen at: http://www.amsat.org/amsat/ariss/SSTV/ The pictures are sent using Slow Scan television (SSTV) on 145.800 MHz FM. On that frequency you will may hear either the Astronauts talking to other Radio Amateurs on Earth (5 of the 6 Astronouts on ISS have Amateur radio licences) or AX.25 Packet, or SSTV pictures. Decoding software for SSTV using the a PC sound card is free, see Free Slow Scan TV Software MMSSTV http://mmhamsoft.amateur-radio.ca/ How to receive SSTV from ISS http://www.marexmg.org/fileshtml/howtouseiss.html More radio hams heading for space station http://www.southgatearc.org/news/may2009/more_hams_for_iss.htm Soundcard AX.25 software is also available. 73 Trevor M5AKA RSS Daily Radio News: http://www.southgatearc.org/ Daily News via Email: http://www.feedburner.com/fb/a/emailverifySubmit?feedId=2783644&loc=en_US Submit your news: http://www.southgatearc.org/news/your_news_1.htm or email editor at southgatearc.org
RE: [digitalradio] Phone/Image Band FCC bandwidth limit on HF Re: USA ham rules
FCC say "a RTTY or data emission using a digital code specified in this paragraph may use any technique whose technical characteristics have been documented publicly" I can't see that you've got any bandwidth restriction on HF subject to each individual carrier having a maximum symbol rate of 300 baud. That in itself is a pointless restriction but it doesn't stop you having wide B/W data transmission using multiple carriers. In the UK there are no restrictions on modulation techniques or the bandwidth subject to the transmission fitting within an Amateur band. 73 Trevor M5AKA --- On Wed, 25/03/09, Dave AA6YQ wrote: From: Dave AA6YQ Subject: RE: [digitalradio] Phone/Image Band FCC bandwidth limit on HF Re: USA ham rules To: digitalradio@yahoogroups.com Cc: "Dave Bernstein AA6YQ" Date: Wednesday, 25 March, 2009, 2:09 AM The table in §97.305 (Authorized emission types) indicates that §97.307(f)(3) applies to all use of RTTY or data emission types in the amateur bands below 28 mhz. §97.307(f)(3) says "Only a RTTY or data emission using a specified digital code listed in §97.309(a) of this Part may be transmitted. The symbol rate must not exceed 300 bauds, or for frequency-shift keying, the frequency shift between mark and space must not exceed 1 kHz." The table in §97.305 indicates that §97.307(f)(4) applies to all use of RTTY or data emission types on the 10 meter band; it expands the upper limit on symbol rate to 1200 baud, but retains the maximum FSK frequency shift of 1 kHz. See <http://www.arrl.org/FandES/field/regulations/news/part97/d-305.html#307> 73, Dave, AA6YQ -Original Message- From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com]on Behalf Of expeditionradio Sent: Tuesday, March 24, 2009 6:44 PM To: digitalradio@yahoogroups.com Subject: [digitalradio] Phone/Image Band FCC bandwidth limit on HF Re: USA ham rules > Frank k2ncc wrote: > I think the confusion I have with "quality phone > transmission" comment is the part that says > "...of the same modulation type." Hi Frank, The FCC rule about HF signal bandwidth limit related to a "phone emission of the same modulation type", applies mainly to Image signals within the HF "Phone/Image sub-bands". That limit DOES NOT APPLY to Data/RTTY signals in the Data/RTTY sub-bands. Beware, there are a few narrow-minded hams continuing to spread disinformation about digital bandwidth limits. What motivates them to do so? Are they trying to scare us into self-inhibiting our freedoms? Or a desire to retard the advancement of radio technology? Whatever their reason is for using the "Big Lie" technique, it won't work in this case, because it is too easy now for USA hams to go to the source of true facts about bandwidth limits. That source is: the FCC rules on the web. The best way to understand the FCC rules about ham radio is to read the FCC rules, footnotes, tables, orders, definitions, specifications, and FCC opinions. I acknowledge that not everyone is quite as enthusiastic about reading this exciting material as I am. So, perhaps it will help to point out the parts of the tome that are pertinent to this discussion. Turn your hymnals to Part 97 :) - The FCC rules contain a table of frequency bands in paragraph (c) of "§97.305 Authorized emission types." - In that §97.305 table, one can see "Standards" that apply to each sub-band or segment of a ham band. These little details are the key to understanding. Some Notes apply to certain sub-bands but not others. Here are the important things to look for: - Observe that "Footnote (2)" can be found in the "Phone/Image sub-bands" but Footnote(2) cannot be found in the "Data/RTTY sub-bands"! - The text of this important Standard (2) is found in: "§97.307 Emission standards" paragraph (f) . Here is the full text of §97.307 (f) (2) - " No non-phone emission shall exceed the bandwidth of a communications quality phone emission of the same modulation type. The total bandwidth of an independent sideband emission (having B as the first symbol), or a multiplexed image and phone emission, shall not exceed that of a communications quality A3E emission." The main types of "non-phone emissions" this bandwidth limit applies to, only in the "phone/image subbands are: 1. Image content (such as video or photo) 2. FAX image (such as drawings or documents) The FCC rules define what a "Phone" signal is. It includes speech and some other things, such as selective calling and controlling tones. The FCC definition of the word "Phone" can be found in §97.3(c)(5) Definitions of terms that are used in Par
[digitalradio] ETSI Standards - 6.25 kHz spacing Digital Voice and narrowband data
The ETSI website contains a number of Digital Radio related publications available for free download such as ETSI TS 102 658 V1.1.1 (2008-12) Electromagnetic compatibility and Radio spectrum Matters (ERM); Digital Private Mobile Radio (dPMR) using FDMA with a channel spacing of 6.25 kHz EN 301 166 V1.1.1 (1999-02) Electromagnetic compatibility and Radio spectrum Matters (ERM); Land mobile service; Technical characteristics and test conditions for radio equipment for analogue and/or digital communication (speech and/or data) and operating on narrowband channels and having an antenna connector ETSI TR 102 616 V1.1.1 (2008-03) PowerLine Telecommunications (PLT) [BPL]; Report from Plugtests™ 2007 on coexistence between PLT and short wave radio broadcast; Test cases and results Details of how to download these publications can be found at ETSI Standards available as free downloads http://www.southgatearc.org/news/february2009/etsi_standards.htm 73 Trevor M5AKA Daily Amateur Radio RSS News: http://www.southgatearc.org/ Get Daily Amateur Radio News by Email http://www.feedburner.com/fb/a/emailverifySubmit?feedId=2783644&loc=en_US
