[digitalradio] Re: Technical Question: FDMDV
A 50 baud signal should have either a 50 Hz or a 100 Hz separation by my understanding. fdmdv modem is NOT OFDM. (would be called OFDMDV if it was) And even with ofdm, 50baud and 50hz will not work in real world. Try to googe ofdm and guard interval. What spacing would an ofdm systen with 50 baud and 1/3 guard interval, 2/3 symbol time have?
[digitalradio] Re: Technical Question: FDMDV / QPSK in PSK31
Modem description from Peter G3PLX (the modem author): --- The modem is based on a raised cosine shaped tone filter response which has the property of zero ISI and zero adjacent tone interference with no sidelobes. Half the channel filter is in the tx and the other half in the rx, so it's often called root raised cosine because the channel filters at each end have a response which is the square-root of the complete filter. ---
[digitalradio] Re: Technical Question: FDMDV / QPSK in PSK31
Yes, my note about bpsk/qpsk was nonsense. My understanding of theory is that baud equals the spread between tones in an OFDM or 2* baud in basic multi-tone signal. As someone noted, it is not ODFM. That does not fit with a 50 baud and 75 Hz separation. Compromise on total signal width and intersymbol interference. Vojtech
Re: [digitalradio] Remote Access Desktop, and remote digital operation
If you forward port 3389 on your firewall to that machine, it will probably work. There are other options: RealVNC which allows you to share the desktop rather than one person at a time (when you log in remotely into a Windows XP/Vista machine using Remote Desktop, the local console is blanked out to the Login screen). Someone else mentioned PCAnywhere but I haven't used that program in decades... I'd probably recommend http://logmein.com because it's able to transit firewalls with ease and allows desktop sharing. There is a free version that allows a pretty high amount of client machines to be accessible via the web interface. The software works on all platforms whether it's windows, linux, mac.. as long as it's a reasonably modern operating system. John Bradley wrote: I have been fooling around with Windows XP remote access desktop, and found that I can readily access a desktop on any computer , wired or wireless, connected to my router. Further, I found that if I was signed in on the ham computer , and MultiPSK or MixW was running already, I could change modes etc and actually do a digital QSO from a remote computer. I also had the Kenwood rig control software running, so could change frequencies, power, etc etc . Since Digital doesn’t need any audio feed to the remote, or microphone feed, it really lends itself to remote operations. Trying this from the internet though did not permit accessing the computer…… according to XP documentation it’s possible but didn’t work for me. It looks like we need a Virtual Private Network (VPN) to do this? Possible applications include remote control of a Station located in an EOC, and enabling folks like Patrick To access a station in North America to try the software personally. I’m not sure of the US laws, but know that Patrick could run a station here remotely, signing himself F6CTE/VE5 , since there is a reciprocal agreement between Canada and France Any bright ideas on how we can do this ? John VE5MU Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/drsked/drsked.php View the DRCC numbers database at http://groups.yahoo.com/group/digitalradio/database Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[digitalradio] Re: [multipsk] Remote Access Desktop, and remote digital operation
John I too use Remote Desktop on my local LAN to access my Ham gear. As far as access from the Internet, there could be an issue with a hardware or software firewall blocking inbound data. I need to try this here, as I have access too 2 WANs (ISPs) at home. 73... Jon W1MNK Brandon, FL USA John Bradley wrote: I have been fooling around with Windows XP remote access desktop, and found that I can readily access a desktop on any computer , wired or wireless, connected to my router. Further, I found that if I was signed in on the ham computer , and MultiPSK or MixW was running already, I could change modes etc and actually do a digital QSO from a remote computer. I also had the Kenwood rig control software running, so could change frequencies, power, etc etc . Since Digital doesn't need any audio feed to the remote, or microphone feed, it really lends itself to remote operations. Trying this from the internet though did not permit accessing the computer.. according to XP documentation it's possible but didn't work for me. It looks like we need a Virtual Private Network (VPN) to do this? Possible applications include remote control of a Station located in an EOC, and enabling folks like Patrick To access a station in North America to try the software personally. I'm not sure of the US laws, but know that Patrick could run a station here remotely, signing himself F6CTE/VE5 , since there is a reciprocal agreement between Canada and France Any bright ideas on how we can do this ? John VE5MU
Re: [digitalradio] Announcing the Digital Radio Century Club JT65A New Years Crawl !
Barry, I missed this email earlier, glad I found it. I really appreciate your feedback, I also received feedback from a Japanese station today and will make a few changes this weekend, after some more study. Andy. On Dec 3, 2007 10:50 PM, Barry Garratt [EMAIL PROTECTED] wrote: Hi Andy, It's a nice idea but bear in mind that with a perfect scenario the maximum number of contacts per hour would only be 12. A full exchange with a CQ thrown in would take 5 minutes to complete. Also because the text boxes are limited to 13 characters in my case it is not possible to call CQ DRCC VE3CDX - it will get truncated to CQ DRCC VE3CD. It will work though if I run the text together such as CQDRCC VE3CDX. The grid square gets thrown away though. If you are proposing using EME protocol then operators can edit the text boxes quite easily but if there are a lot of stations and there is QRM then it will be very difficult to distinguish who is sending RO EM00 - especially if there are two stations in EM00. Or if someone is sending RO and their DRCC number. If you are proposing to use terrestrial protocol then you can make it work as long as the operators do a lot of editing of the text boxes. And are very careful about spacing of the characters. If an inadvertent space gets inserted then some information is going to get missed. Just my thoughts. 73, Barry VE3CDX/W7 DM26ic As a point if interest the JT65 modes do not allow use of the /W7. There is a definite set of prefixes that the JT65 modes recognize but /W7 isn't in the list. In fact /W or /K are also illegal characters. The /W7 is valid with the meteor scatter modes though - FSK441 and JT6M. If someone works me on JT65A on HF they may think I'm in VE3 unless they pay attention to the DM26 grid. From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Andrew O'Brien Sent: Sunday, December 02, 2007 11:05 AM To: DIGITALRADIO; WSJT Subject: [digitalradio] Announcing the Digital Radio Century Club JT65A New Years Crawl ! Announcing the Digital Radio Century Club New Years Crawl Date : January 1 2008 Time : Z to 0100Z AND 1200Z to 1300Z (total operating time - 2 hours) Mode. JT65A ONLY Suggested CQ.. CQ DRCC de yourcall Bands : 20M or 40M ONLY. (suggested frequency 14074-077, 7035-40, ) Class: Single operator low power only (under 100 watts) Exchange: DRCC members RST and DRCC number. Non-DRCC members send Grid Square RO of DRCC number or grid square must be received for valid contact. Multipliers: Number of stations worked with DRCC numbers under 100 and... Number of stations worked outside your continent* Scoring : 5 points each DRCC member contact 1 point each non- DRCC member contact Stations can be worked once per band Example K3UK works 55 DRCC stations , 275 K3UK works 20 non-DRCC stations, 20 poiints sub-total = 295 Points Of 55 DRCC stations worked, 10 gave DRCC numbers below 100. 295*10 = 2,950 points Of 75 QSOs 10 were outside of North America 2,950 * 10 = 29,500 total points. (multipliers count PER band, e.g. K3UK DRCC, number 001 , work on 40 and 20M is two multipliers. VK7DX worked by a North American station on 40 and 20M is TWO multipliers). Submit logs in text format to [EMAIL PROTECTED] by Feb 1 2008. Results will be posted at http://groups.yahoo.com/group/digitalradio/files/ Those who wish to obtain a DRCC number prior to December 31 may do so by sending a request to [EMAIL PROTECTED] * ARRL defination of continent boundaries . North America includes Greenland (OX) and Panama (HP). South America includes Trinidad Tobago (9Y), Aruba (P4), Curacao Bonaire (PJ2-4) and Easter Island (CE0). Oceania includes Minami Torishima (JD1), Philippines (DU), Eastern Malaysia (9M6-8) and Indonesia (YB). Asia includes Ogasawara Islands (JD1), Maldives (8Q), Socotra Island (7O), Abu Ail Island (J2/A), Cyprus (5B, ZC4), Eastern Turkey (TA2-9) and Georgia (4L). Europe includes the fourth and sixth call areas of Russia (R1-6), Istanbul (TA1), all Italian islands (I) and Azores (CU). Africa includes Ceuta Melilla (EA9), Madeira (CT3), Gan Island (8Q), French Austral Territory (FT) and Heard Island (VK0). See http://www.arrl.org/awards/wac/ Suggested Software: WSJT or DM780 (pending DM780 beta release with JT65A) . Score the contest manually of via home brewed spreadsheets. -- Andy K3UK www.obriensweb.com (QSL via N2RJ) -- Andy K3UK www.obriensweb.com (QSL via N2RJ) -- Andy K3UK www.obriensweb.com (QSL via N2RJ)
RE: [digitalradio] Remote Access Desktop, and remote digital operation
I have in the past used LogMeIn and Skype to remotely control my home station while running RTTY, PSK, and CW. Recently, a new free remote access service has become available: https://www.crossloop.com/landing.htm . This service installs a client on each participating PC, and uses the web to mediate access. Its performed well in basic tests, but I've not tried remote control with it. I'm considering its use as a support tool for DXLab. A remote control technique that I've not often heard mentioned is to place a webcam in your home station and focus it on your transceiver. This lets you monitor transceiver, amplifier, rotator,a nd power supply readouts that might not be available via your station control software. Tnx to Tom AB2UL... 73, Dave, AA6YQ Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/drsked/drsked.php View the DRCC numbers database at http://groups.yahoo.com/group/digitalradio/database Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[digitalradio] RAIN Report: Bob Bruninga, WB4APR, Talks About a New Direction for APRS
RAIN Report: Bob Bruninga, WB4APR, Talks About a New Direction for APRS http://www.therainreport.com/rainreport_archive/rainreport-12-6-2007.mp3 Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping
[digitalradio] Remote Access Desktop, and remote digital operation
Hello John, The remote control through TCP/IP exists in Multipsk. I and Cesco (HB9TLK) have permitted to control a remote transceiver thanks to a TCP/IP link through which it is transported the sound (as Skipe) and the commands (RX/TX). For this, click on the button Mdem. Click on Help (RX/TX operations through signals exchanged with a TCP/IP server) for more details. You must start, on the remote transceiver side, either Gui_serv_Multipsk (HB9TLK) or Multidem (F6CTE). It is not as complete as what is presented by K7AGE (because it is limited to digital modes and you can't change the XCVR frequency), but it permits at least to make digital QSOs through the remote transceiver. For example it might be possible to send CQ DE F6CTE/VE5MU F6CTE/VE5MU +K if F6CTE controls the transceiver of VE5MU (in fact it is theoritical as it is strictly forbidden in France). Afterwards, F6CTE will be able to QSO with another Ham. However there is a random latency time (up to several seconds) due to Internet which remind you that you are not in direct... 73 Patrick - Original Message - From: John Bradley To: [EMAIL PROTECTED] ; digitalradio@yahoogroups.com Sent: Friday, December 07, 2007 6:21 PM Subject: [multipsk] Remote Access Desktop, and remote digital operation I have been fooling around with Windows XP remote access desktop, and found that I can readily access a desktop on any computer , wired or wireless, connected to my router. Further, I found that if I was signed in on the ham computer , and MultiPSK or MixW was running already, I could change modes etc and actually do a digital QSO from a remote computer. I also had the Kenwood rig control software running, so could change frequencies, power, etc etc . Since Digital doesn't need any audio feed to the remote, or microphone feed, it really lends itself to remote operations. Trying this from the internet though did not permit accessing the computer.. according to XP documentation it's possible but didn't work for me. It looks like we need a Virtual Private Network (VPN) to do this? Possible applications include remote control of a Station located in an EOC, and enabling folks like Patrick To access a station in North America to try the software personally. I'm not sure of the US laws, but know that Patrick could run a station here remotely, signing himself F6CTE/VE5 , since there is a reciprocal agreement between Canada and France Any bright ideas on how we can do this ? John VE5MU
Re: [digitalradio] Remote Access Desktop, and remote digital operation
I have been doing this for years while I was working in the St. Louis area 70 miles from my station. I was using a program called PcAnyWhere With a rig control program for the FT-847 and a program for the TNC I had many a QSO remote. I understand what you are saying and sure it can be done. But the Windows XP remote access only works for XP pro does it not? Never used it since I have the pcanywhere. John, W0JAB
Re: [digitalradio] Re: The sorry state of VHF/UHF Packet
Hi Ed, Ed Woodrick wrote: [snip] And in this entire thread, I'm surprised that I haven't seen any comments about D-STAR! 960 bps is built into every radio and the ID-1 can do 128 kbps. It's not AX.25, but it is packet digital data. It's pretty cool to put two ID-1s back to back and watch the amount of data that can be transfered. And since the ID-1 have Ethernet jacks, that means that you can do any Internet protocol that you want. Did not seem to be a reason to comment as the topic was packet. A group of us have used the 23cm ID-1s in the digital data mode (128kbps) in a local public service event just find the past two years. We used the access point and the user radios to allow operators at out stations to access a web server front end to the event database. Worked fine. In addition we used 2 ID-1s connected to an ethernet switch to serve as a relay for a site that did not have a good direct path. And of course tested two ID-1s as an Ethernet bridge which makes a nice 128 kbps backbone for say 9600 bps packet gateways. As an aside we also had a 9600 bps packet system up as a back up which also worked fine. 73, Tom n4zpt
[digitalradio] Remote Access Desktop, and remote digital operation
I have been fooling around with Windows XP remote access desktop, and found that I can readily access a desktop on any computer , wired or wireless, connected to my router. Further, I found that if I was signed in on the ham computer , and MultiPSK or MixW was running already, I could change modes etc and actually do a digital QSO from a remote computer. I also had the Kenwood rig control software running, so could change frequencies, power, etc etc . Since Digital doesn't need any audio feed to the remote, or microphone feed, it really lends itself to remote operations. Trying this from the internet though did not permit accessing the computer.. according to XP documentation it's possible but didn't work for me. It looks like we need a Virtual Private Network (VPN) to do this? Possible applications include remote control of a Station located in an EOC, and enabling folks like Patrick To access a station in North America to try the software personally. I'm not sure of the US laws, but know that Patrick could run a station here remotely, signing himself F6CTE/VE5 , since there is a reciprocal agreement between Canada and France Any bright ideas on how we can do this ? John VE5MU
Re: [digitalradio] Remote Access Desktop, and remote d igital operation
I control 3 PC's running pskmail servers via the internet using various flavours of vnc. .(X11vnc, RealVNC) It is only a matter of freeing the right ports in your firewall. Works for windows as well as Linux and Mac OS. There is even a Java web browser solution using port 5800+number_of_your-desktop. Best solution is to run a vnc connection via a SSH tunnel, whcih gives you a secure channel. When you first start a vnc desktop and start your apps after that you can disconnect from the desktop and come back to it later. 73, Rein PA0R -Ursprüngliche Nachricht- Von: digitalradio@yahoogroups.com Gesendet: 07.12.07 18:21:22 An: digitalradio@yahoogroups.com Betreff: [digitalradio] Remote Access Desktop, and remote digital operation I have been fooling around with Windows XP remote access desktop, and found that I can readily access a desktop on any computer , wired or wireless, connected to my router. Further, I found that if I was signed in on the ham computer , and MultiPSK or MixW was running already, I could change modes etc and actually do a digital QSO from a remote computer. I also had the Kenwood rig control software running, so could change frequencies, power, etc etc . Since Digital doesnt need any audio feed to the remote, or microphone feed, it really lends itself to remote operations. Trying this from the internet though did not permit accessing the computer according to XP documentation its possible but didnt work for me. It looks like we need a Virtual Private Network (VPN) to do this? Possible applications include remote control of a Station located in an EOC, and enabling folks like Patrick To access a station in North America to try the software personally. Im not sure of the US laws, but know that Patrick could run a station here remotely, signing himself F6CTE/VE5 , since there is a reciprocal agreement between Canada and France Any bright ideas on how we can do this ? John VE5MU -- http://pa0r.blogspirit.com Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/drsked/drsked.php View the DRCC numbers database at http://groups.yahoo.com/group/digitalradio/database 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/
