Propview SNR levels per mode
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Inbody, Don
What SNR levels are you all using per mode on PropView's Configuration/Prediction tab?
73, Don AD0K |
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D. Scott MacKenzie
I use -15 for all. I think it is the default. One thing I have found is that the predictions are very conservative as I can work stuff long after the prediction says I shouldn't be able to. For instance I have worked a lot of 12M stuff long after the prediction indicates the band has closed. It is not because I have a super station - just 70W and a gap titan vertical.. Scott What SNR levels are you all using per mode on PropView's Configuration/Prediction tab? |
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Dave AA6YQ
+ AA6YQ comments below
I use -15 for all. I think it is the default. One thing I have found is that the predictions are very conservative as I can work stuff long after the prediction says I shouldn't be able to. For instance I have worked a lot of 12M stuff long after the prediction indicates the band has closed. It is not because I have a super station - just 70W and a gap titan vertical.. + On the Main window's Parameters tab, you can make the predictions less conservative by 1. reducing the Avail parameter (Conditions panel) 2. lowering the TakeOff angle ("Your Station" panel) 73, Dave, AA6YQ |
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D. Scott MacKenzie
Thank you Dave - right now I have a take off angle of 3, but I have no idea if that is accurate. My Avail is set at 10. I use the default. As I recall it is the % or the required circuit reliability. Wouldn't increasing the Avail reduce the propagation, or am I thinking about it wrong? I don't mind it being conservative. I do have a pretty low noise level, and that helps. I was just replying that I have my SNR set to -15 for the digital modes.
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Scott aka KB0FHP -----Original Message-----
From: DXLab@groups.io <DXLab@groups.io> On Behalf Of Dave AA6YQ Sent: Wednesday, March 22, 2023 6:12 PM To: DXLab@groups.io Subject: Re: [DXLab] Propview SNR levels per mode + AA6YQ comments below I use -15 for all. I think it is the default. One thing I have found is that the predictions are very conservative as I can work stuff long after the prediction says I shouldn't be able to. For instance I have worked a lot of 12M stuff long after the prediction indicates the band has closed. It is not because I have a super station - just 70W and a gap titan vertical.. + On the Main window's Parameters tab, you can make the predictions less conservative by 1. reducing the Avail parameter (Conditions panel) 2. lowering the TakeOff angle ("Your Station" panel) 73, Dave, AA6YQ |
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Dave AA6YQ
+ AA6YQ comments below
Thank you Dave - right now I have a take off angle of 3, but I have no idea if that is accurate.+ That's not a conservative takeoff angle, but you could try 2. My Avail is set at 10. I use the default. As I recall it is the % or the required circuit reliability. Wouldn't increasing the Avail reduce the propagation, or am I thinking about it wrong? + You have it right. You could of course reduce the Avail to a lower value to see if that better correlates with actual propagation. + PropView is just a graphical user interface for VOACAP, so you might spend some time with the VOACAP documentation to better understand the parameters. You'll find the script that PropView generates to drive VOACAP in the Script.txt file in the Run folder within PropView's itshfbc folder; the numerical results that PropView plots are in the results.txt file in the same Run folder. 73,
I don't mind it being conservative. I do have a pretty low noise level, and that helps. I was just replying that I have my SNR set to -15 for the digital modes. |
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D. Scott MacKenzie
Thank you Dave – I use PropView as an indication not an absolute. If there is a chance that I have propagation – I try it anyway. I will look at the documentation further. Always something new to learn
From: DXLab@groups.io <DXLab@groups.io> On Behalf Of Dave AA6YQ
Sent: Wednesday, March 22, 2023 7:25 PM To: DXLab@groups.io Subject: Re: [DXLab] Propview SNR levels per mode
+ AA6YQ comments below
+ That's not a conservative takeoff angle, but you could try 2.
+ You have it right. You could of course reduce the Avail to a lower value to see if that better correlates with actual propagation. + PropView is just a graphical user interface for VOACAP, so you might spend some time with the VOACAP documentation to better understand the parameters. You'll find the script that PropView generates to drive VOACAP in the Script.txt file in the Run folder within PropView's itshfbc folder; the numerical results that PropView plots are in the results.txt file in the same Run folder. 73,
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Jamie WW3S
I never used propview until Crozet, surprisingly how accurate it was/is…..
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On Mar 22, 2023, at 7:37 PM, D. Scott MacKenzie <kb0fhp@...> wrote:
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