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ТЕМА: vhf audio distortion with narrow fm mode

vhf audio distortion with narrow fm mode 08 Дек 2019 17:30 #1

  • ilias
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Hello
Have you ever works with sun sdr 2 pro in 2 meters with narrow fm mode?
When I monitoring my tx audio with my second receiver I found that the audio is full of low frequensys !! now when I try to clear my audio with my tx equalizer the audio star to distord !!everyone say that I have rfi problem i have tested all version in all amateur hf and vhf band with the same results with ssb mod or am mod my tranceiver work apsolutelly perfect!!!! what I am missing??

version 1.3.1 uptate 4
tranceiver sun sdr 2 pro
mic yaesu md 200 in to mic 2 port
best regards
ilias michopoulos
sv1 duj
athens Greece
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vhf audio distortion with narrow fm mode 02 Янв 2020 12:38 #2

  • n1mjf
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It sounds like your deviation is not set properly.

Open the radio options, device tab, TX sub-tab and you will see the NFM settings. I'm using deviation of 5000 and a high-cut of 8000. If you're operating through a narrow repeater, you will have to cut the deviation down to 2500.
Current set up: SunSDR2 DX, HiFi audio, Alpha Delta DX-CC up 20 feet.
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