With the bonus of DAX not requiring A/D conversion and the attendant degradation of received signals, your great installation, radio, and location really do put you ahead of the average Joe. toggle quoted message. 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. Here you will see that on my FT8 Transmit some decoded me as +13 and others closer as -3, this can be due to skip zones as well as different antenna setups, etc. 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. Lets try to figure it out. I am running a full 100W into my radio. Welcome to the new FlexRadio Community! 4. the QSO record in ACL log does contain the signal report . A WSJT-X application screenshot in FT8 mode looks like this: Source: 3fs.net.au/ft8-digital-amateur-radio. +19 is about the best you should get, down to about -24dB. Show quoted text. If you are wondering what Amateur Radio is about, it's basically a two way radio service where licensed operators throughout the world experiment and communicate with each other on frequencies reserved for license holders. It was specifically created to work well in really bad situations like meteor scatter or moonbounce. Try lowering the AGC, if any, and/or the output audio level. Please review the new, If you are having a problem, please refer to the. Or,sometimes you could be overdriving and causing splatter due to distortion. The numbers tell you the strength of your FSK signal (6.25 Hz) as it compares to the signals in an entire 2.5 kHz SSB bandwidth. This site uses cookies to enhance your browsing experience, serve personalised ads or content, and analyze our traffic. First off, you need to connect your PC to your HF rig. Now, with FT8, I have real comparisons and can surely see a 5 - 10 db difference for most contacts. By far the most useful weirdness is to shift-click on the waterfall to put your TX signal there (think of it as shift my TX). Increasing FT8 usage on the popular bands 40, 30, and 20m means that the default 3 kHz sub-bands are often wall-to-wall with signals. The _ga cookie, installed by Google Analytics, calculates visitor, session and campaign data and also keeps track of site usage for the site's analytics report. I've seen variations of that kind coming from the same. The mode is a modification of the JT9 & JT65 weak-signal modes that have been around for nearly ten years, an eternity in the digital world. I think this violates the Terms of Service. According to Taylor, the important characteristics of FT8 are T/R sequence length: 15 s Message length: 75 bits + 12-bit CRC FEC code: (174,87) LDPC Modulation: 8-FSK, keying rate = 6.25 baud; tone spacing = 6.25 Hz Waveform: Continuous phase, constant envelope Occupied bandwidth: 50 Hz With the new sun cycle, it is busier than ever20 meters is packed around the clock, so its even difficult to find an open spot to transmit. On average I run about 30 watts only on this mode and have had some success on 70cms along with the other bands. Thats what I do. If you're getting a +5 SNR report then obviously dial it way back but when I do DX at 100 Watts it's usually -10 or less. All this, combined together, made FT8 so popular. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. All topics relating to the hobby are welcome here, from purchasing and building equipment, to operating techniques and activities, and everything in between. canadian space agency; outlander claire tells jamie the truth; kendra place apartments gallatin, tn Then, youll need some software. This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen. These modes, while great for modest stations (read . The full coax length of LMR400 is about 160 feet long (to the tower and up). Hello, after years of saying I would never work FT8 I have finally taken the plunge and having a play. Some use the S-Meter on their radios to give the reading, which is fine if it is accurate (it is notusually as there are many factors) or by ear which frankly is a better way to go about it. The cookie is used to store the user consent for the cookies in the category "Analytics". 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. 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. (references). Information exchanged in a minimal two-station contact typically consists of call signs, four-character Maidenhead locators, signal reports, and acknowledgments. You can make contacts a lot faster on CW or SSB. This website uses cookies to improve your experience while you navigate through the website. wire Questions? 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. Here is what FT8 signals looks like, displayed in the WSJT-X waterfall view: Youll see from the above waterfall screenshot that there are over a dozen QSOs visible these are all taking place on a single frequency of 14.074MHz. As you can see here, I decoded everything from -21 to +05 range on 80m using the WSJT-X Software. During contest and for DX Expeditions everyone is 59 for Phone (USB/LSB) ad 5NN for CW in order to expedite exchange. 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. But does everyone understand the nuances? SNR is expressed in dB (decibles). CleanTalk sets this cookie to complete an anti-spam solution and firewall for the website, preventing spam from appearing in comments and forms. GL, K7TRK. Scorecard Research sets this cookie for browser behaviour research. ), or even compromised antennas. You also have the option to opt-out of these cookies. Right now my antenna is set up as a sloper. signal reports when using FT8 and JT65. But I do look at a lot of FT8 op QRZ profiles of people running an Icom 7300 to some freakishly compromise setup. Operators may or may not be aware of the noise they're creating on the band's, but the result of that noise is is qrm for the others trying to operate on the same band . To maximize the chances of success, each FT8 packet holds 13. Starting with theWSJT-Xversion 2.2.0-rc2 (available for downloading from theWSJT-X website) theWSJT-Xdevelopment team has also published additional FT8 overflow frequencies: 7.071, 10.133, 14.071, and 50.310 MHz. The cookie is used to store the user consent for the cookies in the category "Other. Easy doesn't equate with bad. Just kind of looking for a FT-8 signal report sanity check. FT8 is by nature < 50% duty cycle. IZ1M confirms signal report & replies with his own report, KI7PO tells IZ1M, "Reception Report Received". Norfolk Amateur Radio Club. A good test bed is WSPR. Press J to jump to the feed. The spectrum of the generated signal of our message looks like this: This signal is transmitted almost as is into the air, and the backward process of decoding is activated on the receiver side. It's not a measure of your output. Best advice I can offer, is check pskreporter. JTDX adds a number of FT8 decoding options that are useful on crowded bands and in situations when signals are very weak. Sometimes propagation is like a laser. Pending some tweaking and other optimizations I've a version running using the library right out of the air, receiver SDR is a rtl-sdr dongle. Antenna for 70cms is a 7 ele ZLspecial, fixed towards SE up at about 15 feet. Image source: www.qsl.net/w1dyj/FT8%20for%20web.pdf. The interface will need to connect into the PCs soundcard (for audio) and typically USB for controlling the radio. Please Log in or Create an account to join the conversation. That being said, it just means you are coming in loud at the receiving location. YouTube sets this cookie via embedded youtube-videos and registers anonymous statistical data. When I run FT-8 I set the filter wide open which bumps up to the 15Khz roofing filter instead of the ~3Khz SSB filter. Is there a setting that I am missing somewhere to fix this problem. Frequencies for JS8Call and FT8 are adjustable by the user. These cookies track visitors across websites and collect information to provide customized ads. JS8, a variant of FT8, can send full conversations and relay messages, CQ call from radio operator "KI7PO" along with his. No, I can't confirm that, I only use FT8. 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. Typically I run between 35w-65w for FT-8. Yep I've been lucky enough to get Fiji x2 and Kenya in the past week or 2 so it's definitely working! I'm using a TS-590S for FT-8 on a MyAntennas 4010-1k EFHW that's around 35'. With a SignaLink, it is always best to go back and follow the setup instructions EXACTLY. Consider a practical example the transmission of the phrase CQ DL1ABC JO62. By clicking Accept All, you consent to our use of cookies, however you can select "Cookie Settings" to control your consent. It's in fact often practically unattended. If band is open pulls in FT8 quite well, Copyright 2023. Welcome to Reddit's own amateur (ham) radio club. A +12 signal does not say how much power a person is using. 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. FT8 and Ghost Decodes. (Sources: WSJT-X 2.1.0 Program default settings, DXZone, WSJT-X Documentation, JS8Call Documentation). This blog will explore some of these meanings and oddities. In amateur radio, QRP operation refers to transmitting at reduced power while attempting to maximize one's effective range. JS8Call (JS8) is an amateur radio QSO communication mode based on FT8. - Lucas / W6AER. The exchange above would therefore take about 90 seconds (compared with seven minutes on JT65). Records the default button state of the corresponding category & the status of CCPA. 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). Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously. It is an ICOM feature, not a bug. 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 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. Heck, I even see a difference in dB when running two slices off the same antenna. Create an account to follow your favorite communities and start taking part in conversations. I've been licensed long enough to know this, but I've only recently in the past couple of months started on FT-8. Looking at your location and excellent installation, Id venture to say you have much better receive capabilities than most other stations. 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. What do all the characters mean? I would think that is more than enough to get a decent signal report. If this is the case, then you probably have signal distortion in audio output. As with other data modes, youll need some kind of interface box to sit between the rig and your computer. Online Investing Guide To buy more radios! 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. The only time I bump up to full power is if there's been QSB and the other station isn't copying my "RR73". To enable reporting, you need to enter the following information into the settings or preferences . ft8 signal reports explained. That is no effort to learn a code but able to work stuff you can't hear. JS8 is a variant of FT8 which allows operators to send more information and converse with each other. Transmissions occur in 12.6s intervals (within the 15s transmit cycle window) until an entire message has completed transmitting. However, DX communications are actively performed using FT8. The RST reporting system is represented in three numbers for CW and two numbers for Phone. Want to say thanks? FT8 transmissions can be decoded at S/N down to -21dB (very weak signal). This is just a summary of thebasics, plus a few tips Ive picked up along the way. From DXNews.com, 59 plus 20 for a really strong USB signal, 47 for a somewhat weak but still readable USB signal. Band conditions across the terminator and across the equator also affect your signal and provide only a one way path. This means your pre-amp is worse than theirs, or they're putting way more power into their antenna. AE6Y will be active again as P49Y from Aruba Island, IOTA SA - 036, in ARRL DX CW Contest, 18 - 19 February 2023. I HIGHLY recommend doing this. 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. This cookie, set by Cloudflare, is used to support Cloudflare Bot Management. 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. There is just a PC screen, and the rest is done by algorithms and mathematics. Getting started with FTA Free To Air Satellite Television. The DT in the window of the software shows TIME DIFFERENCE. I wonder if raising the far end up any more would help? Be aware that as currently implemented, WSJT-X will set your dial to the lowest frequency for the selected mode and band, when you switch bands. then work outwards. When the conventional FT8 sub-band on 6, 20, 30, or 40m seems too full, please try moving your dial frequency down 3 kHz! FT8 is designed as an HFHigh Frequency (3-30 MHz) mode, but (as with any amateur radio mode) can also be used on VHFVery High Frequency (30-300 MHz)/UHFUltra High Frequency (300-3000 MHz) if desired. Image source: https://www.amateurradio.com/over-2000-miles-on-80m-with-the-warbler/ (2010). I can see on an external SWR meter that I am sending 100w. Professor Steven Franke and astrophysicist and Nobel laureate Joseph Taylor, have created a fascinating and efficient protocol for data transfer. When you get back a signal report from someone, it just tells you how loud you were on their setup at that particular time. Please leave your Call Sign if applicable. FT8 is designed to maximize communication even when signals are very weak (as low as -24dB). FT8 signal report Sent/Rcv consistent difference. On Tuesday, January 4, 2022, 08:25:36 AM CST, Chris VE3NRT wrote: "The cycle of operation of a machine or other device which operates intermittently rather than continuously. ft8 signal reports explained 97867 74664 head gravity tour string pattern Facebook south tyneside council white goods Twitter best chicken parm near me Youtube. The WSJT-X sources are written in Fortran, and understanding them is not so simple. If a received CW signal is S9 and the meter reads S7 without a signal, the SNR is 12dB (normally each S-unit is 6dB). Why are the signal reports negative numbers? 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. It will gain acceptance in SOTA too. Examples: Does anyone else have this trend as well? Digital modes have been gaining popularity since around the 90s. Nice job. 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. We also use third-party cookies that help us analyze and understand how you use this website. 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). They are a signal to noise representation. I forgot how the software handles the ratio. Each message of up to 13 characters takes 13 seconds to send. This increase has come at the expense of other mode activity, especially CW. Lets see in more detail how this works. 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. Radio operator "IZ1M" replies with his callsign and grid square locator. CleanTalk sets this cookie to prevent spam on the site's comments/forms, and to act as a complete anti-spam solution and firewall for the site. JT65, JT9, FT8 SNR Explained. 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). Lots of variables here. Forgot your username? 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. The cookies is used to store the user consent for the cookies in the category "Necessary". FT8 handles very weak signals very well, meaning that a Foundation licence holder with just 10 watts should be able to make some impressive contacts with a modest antenna - something not possible with voice or some other data modes. 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. Personally, I dont really understand the pleasure of almost completely automatic radio communications, but the FT8 is popular, so people use this. As we can see, FT8 is quite an interesting protocol. UTC: When the signal was received, dB: Signal strength of the received signal in dB. 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. For a successful QSO, which takes about 90 seconds, decodes occur 4 times a minute, 2 second break between cycles. Alternatively, you can add the new FT8 frequencies manually. Pretty fast I got a response that they already have enough articles about FT8 and a screenshot of their archive with articles like Using FT8 in DXpedition in Borneo. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. From there you will be able to pick one style. If you are wondering what Amateur Radio is about, it's basically a two way radio service where licensed operators throughout the world experiment and communicate with each other on frequencies reserved for license holders. The other thing to keep in mind is that signal level is relative to the noise level around the signal. It's a popular mode, so popular in fact that one report citing Club Log data recently showed that 80% of HF contacts in their tracking nowadays are FT8. 1 week 2 weeks 1 month 2 months 3 months 6 months 1 year no. Are you sure you wish to repost this message? FT8 transmits and receives only the bare essentials needed to make an amateur radio contact (QSO): Exhange of callsigns, readability report, signal strength report, and "best regards" ("73"). If nothing else, remember to shift-click . Hertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). After a strong storm, the 80m vertical fallen. YouTube sets this cookie to store the video preferences of the user using embedded YouTube video. Remember the reports you get in WSJT-X are not signal strength values. Automatic miles km. DT: Calculated offset of the received signal from your local clock Values above .3 are not optimal. The message length of 77 bits was chosen as a compromise between the transmission time (about 13 seconds, which is not so fast) and the information capacity the message could be made longer, but the transmit time should also be increased. FT8 handles very weak signals very well, meaning that a Foundation licence holder with just 10 watts should be able to make some impressive contacts with a modest antenna - something not possible with voice or some other data modes. CleanTalkUsed to prevent spam on our comments and forms and acts as a complete anti-spam solution and firewall for this site.

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