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NFM de-emphasis #4

Closed esplien closed 3 years ago

esplien commented 3 years ago

As most amateur VHF/UHF FM transceivers uses a pre-emphasis with 750us characteristic, it is of interest to be able use the corresponding 750us de-emphasis in Qirx NFM to achieve a "flat" response of tx/rx and better S/N-ratio. Selectable of course.

softsyst commented 3 years ago

Espen,

I made a test implementation of the de-emphasis, in the NFM demodulator. I'll send you a PM.

73, Clem

esplien commented 3 years ago

Hi Clem,

  1. Message to advice me that I already had a the program, and adviced me to remove the program, which I did and managed to install Qirx4 NFM de-emph.

When trying to start RX1 after rekonfiguring to 1 rx:

RTl_tcp.exe reports (translated to English): Code running cannot continue because VCRUNTIME140D was not found. New installation of the program might solve the problem.

Code running cannot continue beause Ucrtbased.dll was not found. New installation of the program might solve the problem.

73 de Espen LA1RQ

Sendt fra E-post for Windows 10

Fra: softsyst Sendt: torsdag 8. juli 2021 kl. 15:20 Til: softsyst/qirx_issues Kopi: esplien; Author Emne: Re: [softsyst/qirx_issues] NFM de-emphasis (#4)

Espen, I made a test implementation of the de-emphasis, in the NFM demodulator. I'll send you a PM. 73, Clem — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

softsyst commented 3 years ago

Espen,

Problem #1 is normal behaviour, because this one has the same version as the already installed one. This will not change, because I'll not give such interim builds a new version.

Obviously, I had made a debug build necessitating the dll's you mentioned. Maybe you can download them from somewhere. I'll make a release build for you in any case, not sure if I manage today.

73, Clem

esplien commented 3 years ago

Ok, Clem

I will go shopping and look after My daughters two cats…

Will Try to find the files.

//Espen Sendt fra min iPhone

  1. jul. 2021 kl. 19:28 skrev softsyst @.***>:

 Espen,

Problem #1 is normal behaviour, because this one has the same version as the already installed one. This will not change, because I'll not give such interim builds a new version.

Obviously, I had made a debug build necessitating the dll's you mentioned. Maybe you can download them from somewhere. I'll make a release build for you in any case, not sure if I manage today.

73, Clem

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

softsyst commented 3 years ago

I'll probably not be able to rebuild the rtl_tcp tomorrow, due to other project obligations. You could take it from an older release and copy it into your current install directory, and test the de-emphasis.

I'll get back to you if I found the time to do it.

73, Clem

esplien commented 3 years ago

Oki, no rush!

//Espen Sendt fra min iPhone

  1. jul. 2021 kl. 22:21 skrev softsyst @.***>:

 I'll probably not be able to rebuild the rtl_tcp tomorrow, due to other project obligations. You could take it from an older release and copy it into your current install directory, and test the de-emphasis.

I'll get back to you if I found the time to do it.

73, Clem

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

esplien commented 3 years ago

Hi Clem,

I have reinstalled th 3.14 version and copied the vcruntime and ucrt… files, added into the installation folder of qirx v3 NFM de-emph the ucrt…dll file was accepted; no error, but still error on vcrutime14D…dll missing…

73 de Espen LA1RQ

Sendt fra E-post for Windows 10

Fra: softsyst Sendt: torsdag 8. juli 2021 kl. 22:21 Til: softsyst/qirx_issues Kopi: esplien; Author Emne: Re: [softsyst/qirx_issues] NFM de-emphasis (#4)

I'll probably not be able to rebuild the rtl_tcp tomorrow, due to other project obligations. You could take it from an older release and copy it into your current install directory, and test the de-emphasis. I'll get back to you if I found the time to do it. 73, Clem — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

softsyst commented 3 years ago

V 3.1.5 implements the NFM deemphasis.