Differences

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--- hsmodem [2023/07/22 14:18] – [Usage] m0lte
+++ hsmodem [2023/07/22 15:43] (current) – [Prerequisite] ei5iyb
@@ Line 3: / Line 3: @@
 Official wiki: https://wiki.amsat-dl.org/doku.php?id=en:hsmodem:start
-Official download: https://dj0abr.de/german/technik/sat/modem/images.htm
+Official Windows setup instructions: https://wiki.amsat-dl.org/doku.php?id=en:hsmodem:installwin
-M0LTE's fork with PTT support: https://github.com/M0LTE/AMSAT-DL-QO-100-Modem/releases
+The official download has no PTT support, use M0LTE's fork with PTT support: https://github.com/M0LTE/AMSAT-DL-QO-100-Modem/releases
+===== Prerequisite =====
+If a message about missing DLLs appears when the program starts (msvcp140.dll and others), the Microsoft package: vc_redist.x86.exe must be installed. Please only use the original from Microsoft, this is located here:
+https://support.microsoft.com/de-de/help/2977003/the-latest-supported-visual-c-downloads
+<color #ed1c24>**ATTENTION:**</color> ALWAYS select the <color #ed1c24>x86</color> version (vc_redist.x86.exe) even if you have a 64bit PC!
 ===== Setup =====
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 Run oscardata.exe (you might need to install .NET Framework if you don't have it already)
+After the first start, Windows 10 shows two dialogs to obtain permission for network access. You have to confirm both, otherwise the program won't run.
 Go to Rig Control tab
@@ Line 29: / Line 38: @@
 Do as you please with announcement before TX - it transmits a voice description of the mode - I have turned this off
-Select your transceiver audio interfaces, similar to WSJT-X etc.
+Select your transceiver audio interfaces and levels, similar to WSJT-X etc.
+Successful installation and functioning network access can be recognized in the status line by the network address of the modem being displayed.
 ===== Usage (image transmission) =====
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 Click Send to key up and start sending the image. You'll need to tweak audio levels to not over / under-drive the rig- use the same techniques as any other data mode. Don't drive the rig hard.
+**Reception**
+I'll write more about reception when someone sends me something!
+Use the FFT tuning window to align your radio tuning to the transmitting station. The cluster diagram to the left should show e.g. 4 clusters for QPSK when correctly tuned. When you are receiving frames successfully, RX Sync and RX Signal will be green.
+The line at 100Hz in the tuning window is a tuning aid. This makes it very easy to find the exact frequency. In the spectrum display there is a red line at 100 Hz. You bring the 100 Hz peak to this line and the modem will synchronize immediately. A drift “after” locking is not a problem, it is not necessary to always follow the line.
+The received, yellow 100 Hz peak should lie reasonably on the red 100 Hz line.