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). Both are compromises, but my FT8 contacts in Antarctica, Fiji, Australia, NZ, Japan, etc don't know that. 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. 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)) Therefore, FT8 is not a "keyboard-to-keyboard" (real-time chat) mode. 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? As a result, the callsign DL1ABC will be written as 06 29 17 3B we use 4 bytes instead of 6. Forgot your password? I've seen variations of that kind coming from the same. PayPal or Coffee donations are always appreciated. Personally, I dont really understand the pleasure of almost completely automatic radio communications, but the FT8 is popular, so people use this. I consistently get low signal reports for FT8 contacts, typically 15db less than what I send as a received signal. Display Reception Reports. Transmissions occur in 12.6s intervals (within the 15s transmit cycle window) until an entire message has completed transmitting. The one on the right, being about 100Hz wide, is a second harmonic, and the one on the left, being about 150Hz wide, may be a third harmonic. This page was last modified on 14 April 2021, at 21:03. Show quoted text. We are trying to coordinate the suggested frequencies in WSJT-X with updated band plans being considered by IARU, ARRL, and other amateur radio societies. I am not sure how easy it is to measure the output power at the SteppIR, but I could measure power at the bottom of the antenna. This cookie is set by DoubleClick to note the user's specific user identity. This cookie is set by GDPR Cookie Consent plugin. ft8 signal reports explained - dianahayfetz.com Remember this is a S/N report,not a power level report. PDF VHF+ Contesting and the Digital Modes - National Contest Journal 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. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. WSJT (amateur radio software) - Wikipedia Good sensitivity allows using of FT8 with compact or even balcony antennas. As we can see, FT8 is quite an interesting protocol. Create an account. Practical Wireless - March 2023 | PDF | Software Defined Radio | Radio 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. FT8 isn't a QRP mode. FT8 decoding Issue #3 kgoba/ft8_lib GitHub (in the form of a WSJT-X dBThe 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. 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. The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors. This cookie can only be read from the domain they are set on and will not track any data while browsing through other sites. Frequencies for JS8Call and FT8 are adjustable by the user. If I tighten the passband in HDSDR down to like 100hz around the signal of interest, there's virtually no other noise in the WSJT-X passband. The exchange above would therefore take about 90 seconds (compared with seven minutes on JT65). Probably everyone who is at least a bit interested in amateur radio and telecommunications heard about the FT8 digital communication protocol. 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. This is just a summary of thebasics, plus a few tips Ive picked up along the way. Signal reports in FT8 are signal to noise ratio, NOT strength. Are you sure you wish to repost this message? That means that you need your clock to be accurate to the precise second. Professor Steven Franke and astrophysicist and Nobel laureate Joseph Taylor, have created a fascinating and efficient protocol for data transfer. Necessary cookies are absolutely essential for the website to function properly. After a strong storm, the 80m vertical fallen. Nothing defaults to paragraph. The tone is only used for CW (Continuous Wave aka Morse Code) transmissions. FT8 is designed to maximize communication even when signals are very weak (as low as -24dB). Some of these I see the images spaced at twice their mains power frequency. Forgot your password? greg davies daughter carly; can i deposit someone else's check into my chime account; how much is bungee fitness near los angeles, ca; A 14-bit CRC will also be added. I got a + signal report back from one and a -18 or so back from the other. You also have the option to opt-out of these cookies. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I don't run any preamp for FT8. 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. The data being gathered also includes more than just PSK spots, it include JT65 and FT8 -- with FT8 the overwhelming majority at the moment. Records the default button state of the corresponding category & the status of CCPA. This includes: harm to minors, violence or threats, harassment or privacy invasion, impersonation or misrepresentation, fraud or phishing. We also use third-party cookies that help us analyze and understand how you use this website. 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. Of course, before the mass appearance of personal computers in homes, probably no radio amateurs were thinking about transmitting and decoding digital data. Antenna for 70cms is a 7 ele ZLspecial, fixed towards SE up at about 15 feet. Thank you! 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. It works only in coordination with the primary cookie. Best advice I can offer, is check pskreporter. CleanTalkUsed to prevent spam on our comments and forms and acts as a complete anti-spam solution and firewall for this site. The above is an example of what you will find at the PSKreporter.info website where you can monitor your own transmissions and see where you are heard. how to simplify expressions with exponents fractions. Rules don't say anything about Grid Squares or FT8 signal reports. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Each message of up to 13 characters takes 13 seconds to send. YSC cookie is set by Youtube and is used to track the views of embedded videos on Youtube pages. 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 Many Thanks for the link James, explains it well, a useful chart that gives the scale. 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. 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). But opting out of some of these cookies may affect your browsing experience. Create an account to follow your favorite communities and start taking part in conversations. 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. Yep I've been lucky enough to get Fiji x2 and Kenya in the past week or 2 so it's definitely working! There doesn't necessarily need to be a new operating class for Data modes, but that would be OK too. Just kind of looking for a FT-8 signal report sanity check. No, I have just as much noise here as most others living in suburbia. From: FT8-Digital-Mode@groups.io [mailto:FT8-Digital-Mode@groups.io] On Behalf Of Chuck Hemstreet. Essex Ham is dedicated to supporting Amateur Radio. Re: FT8 for Missouri QSO Party - groups.io 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. 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. It's not a measure of your output. Without further information all it says is the other person has a good SNR with your signal. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. The fact that they align properly to the FT8 15-second period, and have 8 tones (the same as FT8) is a sign that these may be distorted FT8 signals, caused by AF harmonics in the transmitter or the receiver. The domain of this cookie is owned by Ebay. 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. (references). ft8 signal reports explained. A good test bed is WSPR. Your antennas ability to direct that transmit power at the receiving station and. FT8 uses 8- GFSK modulation, includes forward error correction ( FEC ), and has an effective data rate of 5 words per minute. This anonymous data helps us to better understand users' needs and customize the website accordingly. A +12 signal does not say you are over driving. ft8 signal reports explained. In 2017, FT8 started to become the most popular of the various data modes. ARRL 10 Meter contest - add Data mode | QRZ Forums FT8 is four times faster (15-second T/R sequences) and less sensitive by a few dB. But I do look at a lot of FT8 op QRZ profiles of people running an Icom 7300 to some freakishly compromise setup. You know I hadn't even thought of that. Image source: www.qsl.net/w1dyj/FT8%20for%20web.pdf. Heck, I even see a difference in dB when running two slices off the same antenna. nanninga campground alberta. JS8Call turns FT8 into a "chat" mode, allowing stations . ft8 signal reports explained I forgot how the software handles the ratio. I primarily run FT8 at 30W into either a 135ft long end fed at about 40ft, or a vertical delta loop with apex around 40ft but base at 6ft. toggle quoted message. ft8 signal reports explained. WARC Bands: What are They and How Can I Take Advantage of Them. Contrary to a lot of angry comments, the stations running high power and getting +10 reports are actually only an S6 above the noise floor. A lot of people hate FT8. This cookie, set by Cloudflare, is used to support Cloudflare Bot Management. 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. If band is open pulls in FT8 quite well, forums.qrz.com/index.php?threads/the-skignal-reports.591508/. A cookie set by YouTube to measure bandwidth that determines whether the user gets the new or old player interface. This cookie is set by GDPR Cookie Consent plugin. Be sure to configure your software properly as described below. Good luck! FT8 from Setup to DX W6AER- Pacifica, CA Typically S7 to S9+ on HF. FT8: Frequencies, Decibels, and Message Meanings. For details of this cookie, go to. 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. To maximize the chances of success, each FT8 packet holds 13. (Sources: WSJT-X 2.1.0 Program default settings, DXZone, WSJT-X Documentation, JS8Call Documentation). Sometimes propagation is like a laser. I noticed for a while that I can hear better than I am being heard. Something like an over driven audio stage generating harmonics of the audio. Welcome to the new FlexRadio Community! A popular mode is FT8. Press J to jump to the feed. 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. JS8 - Signal Identification Wiki When the conventional FT8 sub-band on 6, 20, 30, or 40m seems too full, please try moving your dial frequency down 3 kHz! Re: [CQ-Contest] Reciprocity in signal strength I've been licensed long enough to know this, but I've only recently in the past couple of months started on FT-8. A +12 signal does not say how much power a person is using. AE6Y will be active again as P49Y from Aruba Island, IOTA SA - 036, in ARRL DX CW Contest, 18 - 19 February 2023. main@WSJTX.groups.io | FT8 Low Signal Reports - Lucas / W6AER. When I last had a play the lower the alc the smaller the spurs at each tone change. Band conditions across the terminator and across the equator also affect your signal and provide only a one way path. These cookies will be stored in your browser only with your consent. Digital modes have been gaining popularity since around the 90s. It includes integration with PSK reporter. At the time of writing (Feb 2018), it appears to be the most popular for a number of reasons: As with modes such as JT65 and PSK31, you interface your HF rig to a computer, and send out text encoded by your computer over the amateur bands. Basically anything can be proven and figured out,, but the variables are enormous.. I wonder if raising the far end up any more would help? First off, you need to connect your PC to your HF rig. toggle quoted message Show quoted text For a successful QSO, which takes about 90 seconds, decodes occur 4 times a minute, 2 second break between cycles. digital modes - Unidentified signals on FT8 frequencies - Amateur Radio If I ran the preamp on it would make the situation even worse. 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. 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. This mode allows communicating with a lower s/n ratio compared to PSK31 or RTTY. Question about FT8 signal reports. : r/amateurradio - Reddit Hit tab to get into that menu. 1 week 2 weeks 1 month 2 months 3 months 6 months 1 year no. Do not assume that many folks are running 100 watts or less. The only time I bump up to full power is if there's been QSB and the other station isn't copying my "RR73". FT8 Signal Reports - NARC Forum - Norfolkamateurradio.org 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. These modes, while great for modest stations (read . I am using Windows 10 with WSJT-X v2.5.3 with a USB connection to an iCom 7610 . But yet, you can clearly hear the musical Frequency Shift Key (FSK) tones and watch the FSK tones rise . 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. Try lowering the AGC, if any, and/or the output audio level. ft8 signal reports explained ft8 signal reports explained - rheumatologisttrichy.com I always thought, its likely because of a quiet location, a good radio (6600M) and maybe others running more power. Now, with FT8, I have real comparisons and can surely see a 5 - 10 db difference for most contacts. When you get back a signal report from someone, it just tells you how loud you were on their setup at that particular time. 2,652 Stations <0 1,232 Stations >0. Hacking my Newair Humidor For Cigar Smokers, GOES Geosynchronous Weather Satellite Receiver, Building the SteppIR BigIR Mark IV Vertical Antenna, Configuring WSJT-X for W6TI (or other) Special Event Station Use, Automatic Transverter Selector for FlexRadio, Setting up GOES Weather Satellite Receiver on the Raspberry Pi, Setting up NOAA Weather Satellite Receiver on the Raspberry Pi, Getting Started with Ham Radio Award Hunting, 3B7M Saint Brandon Islands. I think this violates the Terms of Service. Don't you dare speak ill of my compromise antenna, at a compromise height, at a compromise location. The __qca cookie is associated with Quantcast. +19 is about the best you should get, down to about -24dB. ft8 signal reports explained - 201hairtransplant.com The cookie is used to store the user consent for the cookies in the category "Analytics". All this, combined together, made FT8 so popular. 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)). This website uses cookies to improve your experience while you navigate through the website. FT8 Signal Reports - NARC Forum