Free Training. I now have a new Windows 10 computer, loaded with the latest versions of WSJT-X (v2.2.2) and JTAlert (v2.16.17). On our website, you'll find information on what ham radio has to offer, help and advice for radio amateurs and clubs across the UK, and for those in the Essex area, a list of activities and local clubs. FT8 is intended to be quick (relatively) and easy and very sensitive. As you can see here, I decoded everything from -21 to +05 range on 80m using the WSJT-X Software. Share them in the comments below or email me at KE8FMJ@arrl.net. team_fondue 5 yr. ago If this is the case, then you probably have signal distortion in audio output. wire This is measurable to some extent by the signal reports on FT8. Press question mark to learn the rest of the keyboard shortcuts. A C++ version of the encoder can be viewed at http://github.com/kgoba/ft8_lib page, the above code snippets were taken from it. Looking at your location and excellent installation, Id venture to say you have much better receive capabilities than most other stations. I would think that is more than enough to get a decent signal report. This cookie is set by GDPR Cookie Consent plugin. From DXNews.com, 59 plus 20 for a really strong USB signal, 47 for a somewhat weak but still readable USB signal. https://www.sigidwiki.com/index.php?title=FT8&oldid=20766, 3.573 MHz,7.074 MHz,10.136 MHz,14.074 MHz,24.915 MHz,50.323 MHz,70.1 MHz,144.174 MHz,1.84 MHz,18.1 MHz,21.074 MHz,28.074 MHz,50.313 MHz, FT8 is an extremely-weak-signal amateur radio mode that transmits very limited communications. What sort of AGC are you using? All this, combined together, made FT8 so popular. DT: Calculated offset of the received signal from your local clock Values above .3 are not optimal. FT8 signal report Sent/Rcv consistent difference. Image source: https://www.amateurradio.com/over-2000-miles-on-80m-with-the-warbler/ (2010). Watch the following two sites for your call as well. Despite this, according to the statistics, people definitely enjoy FT8 usage. Remember this is a S/N report,not a power level report. This cookie is installed by Google Universal Analytics to restrain request rate and thus limit the collection of data on high traffic sites. Why would I want to operate FT8? I slide it down until my TS-590s ALC meter shows nothing. Then, youll need some software. Have you ever wondered why JT65 reports a Signal-to-Noise Ratio (SNR) typically in the range -30 dB to -1 dB? What's worse in the minds of some . Typically the interface will appear as a COM port and WSJTX will need to be set to the correct COM, PTT So that the PC can put the rig into Transmit, the software needs to know how to trigger Transmit. I got a + signal report back from one and a -18 or so back from the other. Don't you dare speak ill of my compromise antenna, at a compromise height, at a compromise location. +19 is about the best you should get, down to about -24dB. 73 Cliff W3KKO. It contains a hashed/encrypted unique ID. The actual minimum signal to noise ratio of FT8 is around 1 dB in 50 Hz (-156 dBm in a gaussian channel with a perfect 0 dB noise figure receiver), which is consistent with a 1/2 rate LDPC code like the one FT8 uses. how to simplify expressions with exponents fractions. Antenna for 70cms is a 7 ele ZLspecial, fixed towards SE up at about 15 feet. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously. Because only this information can be sent, FT8 is not a "conversation" mode. Different colors are different bands and minutes indicate the last time they heard and reported back automatically. I've been licensed long enough to know this, but I've only recently in the past couple of months started on FT-8. https://physics.princeton.edu/pulsar/K1JT/wsjtx.html WSJT downloads for all platformshttps://physics.princeton.edu/pulsar/K1JT/devel.html WSJT-X source codehttps://github.com/kgoba/ft8_lib FT8 encoderhttp://laarc.weebly.com/uploads/7/3/2/9/73292865/ft8syncv8.pdf Synchronization in FT8https://en.wikipedia.org/wiki/Low-density_parity-check_code LDPC code, Coding, Tutorials, News, UX, UI and much more related to development, Python/IoT developer and data engineer, data science and electronics enthusiast, https://physics.princeton.edu/pulsar/K1JT/wsjtx.html, https://physics.princeton.edu/pulsar/K1JT/devel.html, http://laarc.weebly.com/uploads/7/3/2/9/73292865/ft8syncv8.pdf, https://en.wikipedia.org/wiki/Low-density_parity-check_code. Menu viscount royal caravan. There are several types of interface available, depending on your rig. First off, you need to connect your PC to your HF rig. The name FT8 stands for Franke and Taylor, 8-FSK modulation. You can test it by clapping your hands or sneezing while the FT8 transmission is ongoing, if you see something appearing in the waterfall on your monitor (as I did) then turn the MIC off. PayPal or Coffee donations are always appreciated. This cookie can only be read from the domain they are set on and will not track any data while browsing through other sites. CleanTalk sets this cookie to store dynamic variables from the browser. On Tue, Jan 4, 2022 at 7:15 AM John
wrote: Are you sure you wish to delete this message from the message archives of main@WSJTX.groups.io? 15' on the transformer side and around 35' at the far end up in a tree. I am running a full 100W into my radio. SNR(dB) = 10*LOG[ Signal Power in watts / Noise Power in Watts] For loud signals you can roughly calculate SNR off the S-meter. MOD input should only listen to you PC of course. Some of these I see the images spaced at twice their mains power frequency. It is one of the modes included in the open-source, weak signal, ham radio software package, WSJT-X. That would help. Press J to jump to the feed. Are you sure you wish to repost this message? On Tuesday, January 4, 2022, 04:32:27 AM CST, John wrote: On Tue, Jan 4, 2022 at 10:15 PM, Arnold Lausevich wrote: Do you mean 50% power? Buddy WB4OMG. The following equations explain why FT8 signals start decoding at -26dB and everything else is below the noise floor: SNRFSKFT8 = SNRreportedFT8 + (10 x LOG (2500 Hz/6.250 Hz)) Heres the actual math behind the signal report if you want to deep dive into the concept: The noise floor is relative to the receiving station, however. Ham radio callsigns have a strictly defined format of letters and numbers, which also allows us to record them in a more compact form. Please leave your Call Sign if applicable. The other thing to keep in mind is that signal level is relative to the noise level around the signal. Your transmit and receive capabilities are not that much different. This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen. For example what is the equivalent in comparison to RST. In this case, the PC is generating a signal (usually RTTY or PSK), and the operator communicates with the correspondent using a kind of text chat. Reddit and its partners use cookies and similar technologies to provide you with a better experience. That is no effort to learn a code but able to work stuff you can't hear. The test_cookie is set by doubleclick.net and is used to determine if the user's browser supports cookies. I know that others may run more than that, even for FT8, but probably not many. I've contacted 2 people in the same city before one after another. Create an account to follow your favorite communities and start taking part in conversations. It includes integration with PSK reporter. All this, combined together, made FT8 so popular. ie every 100 or 120Hz. According to WSJT-X instructions you should tune up for maximun output then back off till the power output drops on you monitor. The data being gathered also includes more than just PSK spots, it include JT65 and FT8 -- with FT8 the overwhelming majority at the moment. Here's the actual math behind the signal report if you want to deep dive into the concept: The noise floor is relative to the receiving station, however. How's the ALC meter looking, antenna gain or attenuation, RX bandwidth, etc. There doesn't necessarily need to be a new operating class for Data modes, but that would be OK too. Is there a setting that I am missing somewhere to fix this problem. Finally, after the conversion, we get a sequence of the form 31406520 00000001 04531130 52105775 34623140 65267442 47514714 36372416 64750133 3140652 where each digit represents a tone number from 0 to 7. hihi I jest. Typically means connecting leads to the soundcard, or using a soundcard built in to the interface then setting up software to use the right speaker and mic settings for sending and receiving on the WSJT-X app, Radio interface settings Most common models of radio already have their comms settings built-in to WSJT-X, so its a case of selecting from a list of radios, Connecting to the radios CAT/DATA port for controlling the radio. Online Investing Guide To buy more radios! transmitters. If you find something incorrect, have an update, or if there is something you would like to see added to the site, drop me a line here. FT4 and FT8 are digital protocols designed for rapid and accurate communication between amateur radio stations, particularly in weak-signal conditions. ND4Q starts QSO with signal report ND4Q does not send grid location Causes problems when working complex call signs 75 Sec per QSO, 48 QSOs per hour. Does anyone use a retevis rt95 I tried to join the Monday night net with my Get your Foundation Licence from home (click here), GB1BEL: JOTA 2022, Belchamps Activity Centre, Results from Watson Magitenna installed in loft, G0QQQ confirms signal report & replies with his own report. A lot of people hate FT8. For details of this cookie, go to, Set by Google to distinguish users. Similarly, the JO62 grid-locator is written as a 2-byte number 44 FE 50% save of the data size, compared to the standard ASCII string. . JT65, JT9, FT8 SNR Explained. You are just very strong. All topics relating to the hobby are welcome here, from purchasing and building equipment, to operating techniques and activities, and everything in between. Many ops can compensate with more power, but the problem with that is you quickly exceed your receive capabilities - people can hear you but you cant hear them. Wondering if I can get some clarification. The cookies is used to store the user consent for the cookies in the category "Necessary". Antenna for 70cms is a 7 ele ZLspecial, fixed towards SE up at about 15 feet. Signal reports in FT8 are signal to noise ratio, NOT strength. 23 dB Difference In Signal Reports WA9ONY 200 X Weaker Signal. I've seen the same, that outlier station with a good receive setup or just weird propagation magic that copies you +12 while everyone else in that grid is coping you -10. Signal reports for FT-8 can vary by 10dB or more between cycles due to fading and changing polarization. Some modes, such as JT65, JT9, FT4 and FT8, for example, use a dB system but more about these later. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. However, DX communications are actively performed using FT8. The two options require different actions. The tone is only used for CW (Continuous Wave aka Morse Code) transmissions. The __qca cookie is associated with Quantcast. Common to receive say a European station after their dusk but nothing you can do to make them hear you.
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