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VARA Rise/Fall Threshold Changes Affect JS8?

 

KJ7RBS (I think) did yeoman's work in getting the QDX to work with VARA.? He suggested setting:
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Rise Threshold to 65 (default 80)
Fall Threshold to 45 (default 60)
Min. Samples to 120 (default 480)
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Two questions:
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1. Has anyone tried these Vara compatible settings with JS8?? ?I will if no one has.
2. Is there a way to change these parameters other than running Putty to make the changes in the QDX Configuration application?? It'd be nice to just run a script that tells the QDX what parameters to change.
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Best,
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Jim
K8DDV
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Yes, I have run FT8 and JS8-Call successfully as well with those settings.
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The rise and fall settings had something to do with correcting the double flash low audio error code. I do not know what if any optimizations can be made to those values.
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FT8 and JS8 tone times are slow enough it should work fine with min samples at default. I had to decrease the value so the fastest VARA FSK mode would properly modulate.
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I do not know if there is another way to set parameters.
?
I believe the settings are stored in non-volatile memory, so you only need to set them once. I have not had need to change the settings from the ones I found to work well for VARA so it's been set it and forget it with my QDX (I do need to adjust the per band audio levels a bit more but that's on receive)
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Cheers
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- Jadon
KJ7RBS
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I set mine up for vara when my kx3 was down. I never changed it and use it on ft8 and js8call weekly with no issues.?


Mark Hogan N5OBC


On Tue, Apr 8, 2025 at 9:52?PM KJ7RBS (Jadon) via <jadonerenda=[email protected]> wrote:
Yes, I have run FT8 and JS8-Call successfully as well with those settings.
?
The rise and fall settings had something to do with correcting the double flash low audio error code. I do not know what if any optimizations can be made to those values.
?
FT8 and JS8 tone times are slow enough it should work fine with min samples at default. I had to decrease the value so the fastest VARA FSK mode would properly modulate.
?
I do not know if there is another way to set parameters.
?
I believe the settings are stored in non-volatile memory, so you only need to set them once. I have not had need to change the settings from the ones I found to work well for VARA so it's been set it and forget it with my QDX (I do need to adjust the per band audio levels a bit more but that's on receive)
?
Cheers
?
- Jadon
KJ7RBS
?
?

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