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| howto:js8 [2020/03/02 18:34] – va7fi | howto:js8 [2020/11/06 06:52] – [Note] va7fi |
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| ====== JS8 using IC-7300 ====== | ====== JS8 using IC-7300 ====== |
| To get started, have a look at these two pages: | To get started, have a look at these pages: |
| * [[http://js8call.com/js8call-getting-started/ |Getting Started]] | * [[howto/7300digital |IC 7300 Settings for Digital Modes]] |
| * [[https://groups.io/g/js8call |On groups.io]] | * [[http://js8call.com/ |JS8Call main page]] |
| * [[http://files.js8call.com/latest.html |Download]] | * [[http://files.js8call.com/latest.html |JS8Call Download]] |
| | * [[https://groups.io/g/js8call |JS8Call on groups.io]] |
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| * Port: Same as on the ''Cat Control'' page | * Port: Same as on the ''Cat Control'' page |
| * Mode: None | * Mode: None |
| * Split Operation: None | * Split Operation: Fake It |
| * Tx Delay: 0.2 s | * Tx Delay: 0.2 s |
| * ''Audio'' | * ''Audio'' |
| ===== Computer Timing ===== | ===== Computer Timing ===== |
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| JS8Call transmits in blocks of 15 seconds. For two stations to be able to communicate, the start of these blocks has to be synchronized to within about 2 seconds of the horizontal lines on each station's scope. That's why it's really important for everyone to keep their computer clock as accurate as possible (to within 2 seconds of each other). (see [[http://js8call.com/faq/ | http://js8call.com/faq/]]) | At normal speed, JS8Call transmits in blocks of 15 seconds.((Here's a summary of the different speed: |
| | ^Mode ^Bandwidth ^Speed ^Frame Length ^Mininum SNR ^ |
| | |Slow |25 Hz |8 WPM |30 seconds |-28 dB | |
| | |Normal |50 Hz |16 WPM |15 seconds |-24 dB | |
| | |Fast |80 Hz |24 WPM |10 seconds |-20 dB | |
| | |Turbo |160 Hz |40 WPM |6 seconds |-18 dB | |
| | The new MULTI decoder can decode all four speeds at once.)) For two stations to be able to communicate, the start of these blocks has to be synchronized to within about 2 seconds of the horizontal lines on each station's scope. That's why it's really important for everyone to keep their computer clock as accurate as possible (to within 2 seconds of each other). You can easily test the accuracy of your clock by going to [[https://time.is]] |
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| Here's an example of a block that is within the horizontal lines, so it's well synchronized (with my station anyways): | Here's an example of a block that is within the horizontal lines, so it's well synchronized (with my station anyways): |
| - You can use an **internet** service to adjust your computer's clock such as [[http://www.timesynctool.com/ |Network Time]]. Here are the //Network Time// settings I changed so that it keeps my clock within 200 ms: {{ :howto:nettime.jpg |}} | - You can use an **internet** service to adjust your computer's clock such as [[http://www.timesynctool.com/ |Network Time]]. Here are the //Network Time// settings I changed so that it keeps my clock within 200 ms: {{ :howto:nettime.jpg |}} |
| - If you're "offline", you can use the **WWV time signals**(([[wp>WWV_(radio_station) |Wikipedia: WWV (Radio Station)]])) on 2.5 MHz, 5 MHz, 10 MHz, 15 MHz, or 20 MHz. | - If you're "offline", you can use the **WWV time signals**(([[wp>WWV_(radio_station) |Wikipedia: WWV (Radio Station)]])) on 2.5 MHz, 5 MHz, 10 MHz, 15 MHz, or 20 MHz. |
| - You can use the **Time Drift tool in JS8CALL**, which adjusts the program's clock without changing the operating system's. Make sure that this has a check mark: ''View'' -> ''Show Time Drift Controls'', then at the bottom of the screen you'll see the ''Time Drift'' tool. Use the up and down arrows to adjust your time drift (more on this below):{{ :howto:timing3.png }} | - You can use the **Time Drift tool in JS8CALL**, which adjusts the program's clock offset without changing the operating system's clock. To see the tool, make sure that this has a check mark: ''View'' -> ''Show Waterfall Controls'' -> ''Timing'' tab. Use the up and down arrows to adjust your time drift (more on this below):{{ :howto:timing3.png }} |
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| To check on your CPU usage, press <key>CTRL-ALT-DEL</key> on your keyboard, then select ''Task Manager''. | To check on your CPU usage, press <key>CTRL-ALT-DEL</key> on your keyboard, then select ''Task Manager''. |
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| | ==== Radio Filter ==== |
| | If the waterfall on the JS8Call screen shows a narrow light blue region with darker areas on either side, it could be that your radio filter is too narrow. Roughly, the filter should be set to 3kHz. I usually have mine set between 500Hz and 2700Hz. |
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| ===== Note ===== | <wrap tip> **Some tricks**:</wrap> |
| The first draft of this page was copied over from [[https://ptruchon.pagekite.me |VA7FI's site]] with permission. Please feel free to expend on it. | |
| | * Sometimes, the band is really busy with stations sending Heart Beats. The region between 500Hz and 1000Hz seems to be used mostly for that sort of automated stuff. If you want to stop all those HB from filling up your screen, you can quickly tighten your filter between 1000Hz and 2700Hz. |
| | * The notch filter is also useful sometimes to quiet down a really loud station or a random RTTY signal. |
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