Does anyone know what this connector is please? Right now my antenna is set up as a sloper. These cookies will be stored in your browser only with your consent. Image source: www.qsl.net/w1dyj/FT8%20for%20web.pdf. And strangely enough, this had its advantages the operator himself had to find the right frequency, evaluate the signal quality by ear, see the decoded characters on the screen, type the answer, and so on. Free Training. FT8 uses 8- GFSK modulation, includes forward error correction ( FEC ), and has an effective data rate of 5 words per minute. For more information regarding our Covid policies, please visit vintage faucet handles The exchange above would therefore take about 90 seconds (compared with seven minutes on JT65). What do all the characters mean? The two options require different actions. When I last had a play the lower the alc the smaller the spurs at each tone change. It will gain acceptance in SOTA too. Splattering shows up as an extra wide signal on the receiving waterfall. Your transmit and receive capabilities are not that much different. FT8 was developed by Joe Taylor (K1JT) and Steve Franke (K9AN). It is very easy to beat an EFHW at 35'. Try lowering the AGC, if any, and/or the output audio level. This cookie, set by Cloudflare, is used to support Cloudflare Bot Management. So, its interesting to see the future evolution of the ham radio digital modes. WSJT-X This is the client that most people use for decoding FT8. Digital modes have been gaining popularity since around the 90s. Please Log in or Create an account to join the conversation. The __qca cookie is associated with Quantcast. Radio operator "IZ1M" replies with his callsign and grid square locator. It is popular among amateur radio operators for its ability to send and receive messages despite challenging propagation conditions, high noise environments, low power operations ( QRP ), or even compromised antennas. I wonder if raising the far end up any more would help? Also, JTDX, which many of us use because it often decodes weak signals that WSJT-X misses, uses a different algorithm for computing that report (usually many dB lower). EME is a single letter O and nothing else than a single letter O. Alternatively, you can add the new FT8 frequencies manually. First number is for Readability (R), the second is for Strength (S), and the last one is for Tone (T) when representing CW signals. This letter is often printed on QSL cards between quotation marks (like "O" ) in order to clearly indicate that it's a letter O and not a zero. Yes it can be frustrating some times, but the challenge is half the fun. The chart above shows the agreed-on frequencies for FT8. It is popular among amateur radio operators for its ability to send signals despite challenging propagation conditions, high noise environments, low power operations (QRPIn amateur radio, QRP operation refers to transmitting at reduced power while attempting to maximize one's effective range. This will cause the software to compare the signal to the noise floor of the virtual audio signal which is way lower than my RF noise floor. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. ft8 signal reports explained. Is it because I'm only running around 1/2 power? Probably everyone who is at least a bit interested in amateur radio and telecommunications heard about the FT8 digital communication protocol. Here CQ is the calling code, DL1ABC is a callsign, and JO62 is the grid locator. 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. FT8 is four times faster (15-second T/R sequences) and less sensitive by a few dB. It's a really smart combination of bit optimization, mathematics and usability. See tip 5 and others. Some of these I see the images spaced at twice their mains power frequency. More then 2 seconds difference, no decode! The name FT8 stands for Franke and Taylor, 8-FSK modulation. 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. With all features enabled, JTDX seems to decode more signals on a crowded band than WSJT-X. timeout for worked markers. Hello, after years of saying I would never work FT8 I have finally taken the plunge and having a play. FT8 is a digital mode, too. As a result, the signal report I end up giving is like 30dB higher than it would be if I left the entire passband open. Any other suggestions how to troubleshoot this? Information exchanged in a minimal two-station contact typically consists of call signs, four-character Maidenhead locators, signal reports, and acknowledgments. FT8 is a weak signal - not a low power mode (power works the really weak ones) FT8 lets you work DX on 6m when there would be none FT8 is suddenly dominating VHF/UHF contesting FT8 lets you work weak signal DX without proficient CW skills FT8 is like having constant DX beacons on every band Image source: https://www.amateurradio.com/over-2000-miles-on-80m-with-the-warbler/ (2010). If I ran the preamp on it would make the situation even worse. Subject of the new topic: My antenna is a horrible piece of wire, their antenna is a multi-element yagi on a tower as high as the Babel one, but sometimes this work, take this one with Croatia, 1300km distance on 6m: What you have are good signal reports, I wouldn't change much. the QSO record in ACL log does contain the signal report . Freq: Frequency (Hz) of the received signal, Message Meaning, CQ KE8FMJ EM89 CQ call from KE8FMJ, KE8FMJ N8DXE EN91 N8DXE replies with location, N8DXE KE8FMJ-10 KE8FMJ responds with a signal report, KE8FMJ N8DXE R-09 N8DXE replies with own report, N8DXE KE8FMJ RR73 KE8FMJ says Report Received and Best Regards***, KE8FMJ N8DXE 73 N8DXE says Best Regards. Quantserve sets the mc cookie to anonymously track user behaviour on the website. DT: Calculated offset of the received signal from your local clock Values above .3 are not optimal. The decibel (dB) is a logarithmic unit used to express the ratio of two values of a physical quantity, here the strength of a received signal. To my objection that my article is not about the use of FT8 but about its internal structure, the answer was the theory will not help readers to use FT8 more efficiently. Scorecard Research sets this cookie for browser behaviour research. Both FT8 and JS8 are heavily dependent on an accurate computer clock, since the modes send/receive information in a recurring, automated, 15s transmit/receive cycle. If theres any interest, Im happy to expend this article, but hopefully this tells you what FT8 is all about, and gives you enough to get started. All this is necessary because the maximum message length is 77 bits (not only predefined symbols but of course, arbitrary text and even telemetry can also be transmitted with similar limitations). MOD input should only listen to you PC of course. WARC Bands: What are They and How Can I Take Advantage of Them. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Thats the basics. They are using a directional antenna, and you are using an omnidirectional antenna. 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. From: FT8-Digital-Mode@groups.io [mailto:FT8-Digital-Mode@groups.io] On Behalf Of Chuck Hemstreet. But opting out of some of these cookies may affect your browsing experience. FT8 is Weak Signal Mode FT8 80m Log. Are you sure you wish to repost this message? Now, with FT8, I have real comparisons and can surely see a 5 - 10 db difference for most contacts. 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)), SNRFSKFT8= SNRreportedFT8 + (10 x LOG (400)). For details of this cookie, go to, The __gads cookie, set by Google, is stored under DoubleClick domain and tracks the number of times users see an advert, measures the success of the campaign and calculates its revenue. FT8 transmissions can be decoded at S/N down to -21dB (very weak signal). This anonymous data helps us to better understand users' needs and customize the website accordingly. I've been licensed long enough to know this, but I've only recently in the past couple of months started on FT-8. For example what is the equivalent in comparison to RST. Lets see in more detail how this works. Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Advertisement" category . In 2017, FT8 started to become the most popular of the various data modes. For FT8 and many other digital modes (But not RTTY), the values are measured by the software and are expressed in dB such as -10 or +02 for example. These cookies track visitors across websites and collect information to provide customized ads. From there you will be able to pick one style. Nice job. Band conditions across the terminator and across the equator also affect your signal and provide only a one way path. Display Reception Reports. Having the sequence shown above, we can easily generate a WAV file or directly control the frequency synthesizer in the case of an autonomous beacon. At this step, the message is converted to 00 00 00 23 44 4A 11 91 3F 8B 57 7E CF 78 77 39 55 DE 36 EF 01 48 data block. Until you're into the -20dBs you're being heard. Please leave your Call Sign if applicable. As we know, we have a maximum of 8 tones (modulation type is FSK-8). I think this message isn't appropriate for our group. In log 80k QSOs.Problems with low bands. But this is my personal opinion. If you and your next door neighbor were running FT8 at the same time, with perfectly tuned and adjusted 30 watt rigs, you can be sure that you'd both be "splattering" all over the place. Hertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Examples of non-digital reports would be: The polite thing to do otherwise is to give an accurate report to the other party so they get a feel for how well their signal is getting through. ie you transmit a 50Hz wide ft8 @ 500 and there will be a 100Hz wide image @ 1000 and a 150Hz wide image @ 1500 and a 200Hz wide image @ 2000 and so on. I got a + signal report back from one and a -18 or so back from the other. Press question mark to learn the rest of the keyboard shortcuts. For details of this cookie, go to. I never run more than 5 watts and usually 1 watt or less. ), yet the signals are very audible. For details of this cookie, go to, Installed by Google Analytics, _gid cookie stores information on how visitors use a website, while also creating an analytics report of the website's performance. I always thought, its likely because of a quiet location, a good radio (6600M) and maybe others running more power. then work outwards. Remember the reports you get in WSJT-X are not signal strength values. After a strong storm, the 80m vertical fallen. The DT in the window of the software shows TIME DIFFERENCE. JS8 was created to allow the basic principles of FT8 to be applied to sending actual messages (instead of just the bare minimum QSO information that FT8 limits operators with). I am running a full 100W into my radio. The idea of replacing characters with indexes is important here, which is effective when using a small dictionary size. These frequencies will appear in your drop-down band-selector list after you go to the Settings/Frequencies tab, right-click on the frequency table, and select Reset. Darkness for night shadow (0-1) Show all Show LoTW/eQSL Show LoTW Show eSQL. However, in a VHF+ contest, WSJT-X Auto-Sequencing will fail to exchange the required information for a complete QSO if one station is configured to use Contest Mode and the other is not. Is there a solution? The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors. It's main advantage is that it allows low-power stations with marginal Let's say I call CQ and a few stations respond, the first being pretty weak (call 1st enabled). I use theDimension 4for keeping my clock accurate. Remember this is a S/N report,not a power level report. Since FT8 automatically transmits and receives only the bare minimum of information necessary to complete what officially counts as an amateur radio contact (QSO), FT8 has been criticized by some amateur radio enthusiasts as a means for radio amateurs to 'cheat' their way to victory in certain contests and award categories. I've seen variations of that kind coming from the same. Or,sometimes you could be overdriving and causing splatter due to distortion. Rich Text Editor. Many Thanks for the link James, explains it well, a useful chart that gives the scale. Consider a practical example the transmission of the phrase CQ DL1ABC JO62. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. This signal is transmitted almost "as is" into the air, and the backward process of decoding is activated on the receiver side. SNR(dB) = 10*LOG[ Signal Power in watts / Noise Power in Watts] For loud signals you can roughly calculate SNR off the S-meter. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. On Tue, Jan 4, 2022 at 07:19 PM, neil_zampella wrote: its key down on the carrier how is that 50%? Very helpful. JS8Call turns FT8 into a "chat" mode, allowing stations . Most times the 599, is abbreviated as 5NN for CW only as it is much shorter to send then the actual two nines when using code. Forgot your username? From DXNews.com, 59 plus 20 for a really strong USB signal, 47 for a somewhat weak but still readable USB signal. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. So, the signal reports dont make any sense. The data being gathered also includes more than just PSK spots, it include JT65 and FT8 -- with FT8 the overwhelming majority at the moment. You can also use the excellent online PSK Reporter website to see where your FT8 CQ calls are reaching, as seen in this screenshot: This isnt a full how to guide on setting up FT8, as there are plenty of those online already. 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. IZ1M confirms signal report & replies with his own report, KI7PO tells IZ1M, "Reception Report Received". Even if you don't get a response to your CQ, there are plenty of stations monitoring and reporting to the site, and you can see exactly where you are being heard, and how well you are being heard. FT8 is one of a group of Multiple Frequency-Shift Keying (MFSK) modes that include JT9, JT65 and MSK144 created by Joe Taylor, K1JT and co-developers. Frequencies for JS8Call and FT8 are adjustable by the user. AH2R Team will be active from Guam Island, IOTA OC - 026, in ARRL DX SSB Contest, 4 - 5 March 2023. If you're new to the hobby, we can help you get started - we've helped over 9,200 . Multiple FT8 signals in 3 kHzKiloHertz (kHz) 10^3 Hz audio bandwidth, 15 sec markers. I consistently get low signal reports for FT8 contacts, typically 15db less than what I send as a received signal. You can make contacts a lot faster on CW or SSB. by | Jun 10, 2022 | forsyth county newspaper | the center does not hold meaning | Jun 10, 2022 | forsyth county newspaper | the center does not hold meaning ft8 signal reports explained. Yep I've been lucky enough to get Fiji x2 and Kenya in the past week or 2 so it's definitely working! 1 week 2 weeks 1 month 2 months 3 months 6 months 1 year no. 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. It includes integration with PSK reporter. JS8Call is an experiment to test the feasibility of a digital mode with the robustness of FT8, combined with a messaging and network protocol layer for weak signal communication on HF, using a keyboard messaging style interface. Welcome to Reddit's own amateur (ham) radio club. Typically I run between 35w-65w for FT-8. That would help. Show quoted text. Professor Steven Franke and astrophysicist and Nobel laureate Joseph Taylor, have created a fascinating and efficient protocol for data transfer. There are several types of interface available, depending on your rig. My receive is quiet enough I am giving +10 or higher reports by s2 on some bands. Questions? (references). Many Thanks for the link James, explains it well, a useful chart that gives the scale. JS8 is a variant of FT8 which allows operators to send more information and converse with each other. It works only in coordination with the primary cookie. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Transmissions occur in 12.6s intervals (within the 15s transmit cycle window) until an entire message has completed transmitting. Please Log in or Create an account to join the conversation. It's only used to exchange signal reports, so there's no chatting. Could a strong signal lower the gain so much that the weaker signal no longer decodes? Create an account to follow your favorite communities and start taking part in conversations. Most likely your noise level is much lower than the station(s) you are working but I have also noticed a difference in the reports I give out depending which radio/AGC setting I am using. As you can see here, I decoded everything from -21 to +05 range on 80m using the WSJT-X Software. There are 4 slots per minute, and you transmit for one 15 second block, then listen for replies for 15 seconds, and transmit again for 15 seconds. When you get back a signal report from someone, it just tells you how loud you were on their setup at that particular time. So with these parameters in mind, I've noticed the majority of time I've operated FT-8, my sent signal reports are almost always higher than my reception reports. It's a good way to check the quality of your radio setup, and the radio propagation properties that depend on how grumpy the ionosphere is at the moment. By . 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.

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