The program writes received symbols in raw log file in the " RAW_LOGS" folder. If the " Setup->Text->Clear Rx window once a day" option is selected, this window is cleared automatically at start of a day. The menu option " File->Clear Buffer" clears this window. Received symbols are displayed on the second from top window. The " OnTop" button puts SeaTTY in front of all windows. But there is chance to make incorrect synchronization in that case. When this option is selected, program can synchronize with receiving signal much faster, because it doesn't need special idle symbols to do it. The " Setup->Text->Fast synchronization in NAVTEX" menu option define synchronization method in NAVTEX mode. Narrow deviation is used at long wave band. The "Shift" menu is used to select normal deviation (800 Hz) or narrow deviation (300 Hz) in HF-FAX mode also. Commercial stations use 50 Baud speed and 170 Hz shift usually. Amateur stations use 45 Baud speed and 170 Hz shift usually. They use 85 Hz shift in the longwave band and 450 Hz shift in shortwave bands usually. Signal speed and frequency shift in RTTY mode are selected via the " Speed" and " Shift" menus respectively. The " Mode" menu selects a working mode ( RTTY, NAVTEX, HF-FAX, NWR-SAME, GMDSS DSC - HF, GMDSS DSC - VHF). Amateur RTTY radio station and some commercial station use opposite polarity. For weather station you should use " Normal" position with USB receiver or " Reverse" position with LSB receiver in RTTY, NAVTEX, PACTOR-1 FEC and FAX modes. The " Reverse/Normal" button defines decoded signal polarity. In NWR-SAME and GMDSS DSC VHF modes AFC doesn't work, because frequencies are defined by protocol specifications. These phasing lines are transmitted just before real image transmitting. In HF-FAX mode AFC works during phase lines receiving only. User-selected frequencies are shown at spectrogram by short red lines. maximal deviation from last user-selected frequency. Second number is global deviation in hertzs, i.e. maximal deviation from current frequency. The first number is local deviation in hertzs, i.e. The numbers to the left of the AFC button determines the limits of AFC. The " AFC" button (auto frequency control) adjusts the long red lines (working frequencies) to the closest peak frequencies. When squelch is switched on, the horizontal red line shows the squelch threshold in spectrogram window. The number to the left of the "SQL" button determines the squelch threshold. Logarithmic scale is more convenient usually, but it needs more computer resources. Analogously, the " Setup->View->Logarithmic oscillogram scale" option or Ctrl-Z hotkey switch oscillogram scale. The " Setup->View->Logarithmic spectrogram scale" option or Alt-Z hotkey switch spectrogram window between linear or logarithmic scale. This window can be hide by the " Setup->View->Show oscillogram window" option The bottom window shows an oscillogram of the decoded signal. To change the center frequency, click on the desired frequency (probably between the peaks). In FAX mode these lines show "black" and "white" frequencies. The long vertical red lines in this window show the working frequencies of the decoder filters. Ruler under this window shows frequencies of sound spectrum. In the top window the current spectrum of a signal (blue line) and a peak detector of spectral components (green line) are shown. The working area of the program is divided into several windows, the sizes of which can be changed by the user by dragging the borders. No additional hardware is required you need only a receiver and computer with a sound card.
#Sonic visualiser v2.5 software#
Software also can automatically save NOAA Weather Radio SAME voice messages (NWR SAME) and them digital headers.
It can decode GMDSS DSC (HF and VHF) messages. Transmitted in RTTY, NAVTEX, PACTOR-1 FEC and HF-FAX (WEFAX) modes on longwave and shortwave bands. Simple software to handle devices connected to LPT portĪ program to receive weather reports, navigational warnings and weather charts
A tool for monitoring popular web-cluster service from OH9W/OH2AQ Radio Club Weather messages decoder - RTTY, NAVTEX, PACTOR-1 FEC, WEFAX (HF-FAX), NWR SAME softwareĬluster monitor.
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