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TOPIC: Audio Distortion

Audio Distortion 12 Nov 2023 10:40 #1

Hello,

I am encountering an issue with my SunSDR2 DX. After a while, the audio from the jack labeled "Phones" on the front of the device becomes distorted, making it impossible to listen to. A brief power cycle (on->off->on) resolves the problem temporarily. Notably, the sound via the PC sound card remains consistently good. The distortion occurs even when only listening, i.e. RF issues.

The SunSDR2 DX is running ExpertSDR3 version 03112023, and this problem is not new; it also occurred in the previous ExpertSDR3 version. The firmware version is EED06202100632.

I have attached a short recording of the distorted sound, followed by the power cycle, for reference.
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Audio Distortion 13 Nov 2023 06:14 #2

  • Rome
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Роман, Roman
Expert Electronics
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Audio Distortion 13 Nov 2023 07:29 #3

It seems my attachment was lost.
It is not crackling...

Please listen how it sounds and how it changes with power off/on
1drv.ms/u/s!AoRZPGhUhShFkutYCE2x3MNyNGp77g?e=ilevf7
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Audio Distortion 13 Nov 2023 09:22 #4

  • DK8JV
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I can confirm this happening on both my SunSDR2 DX, and PRO devices. It occurs occasionally, say, once in a week and can always be cured by doing a power cycle.
Only the audio from the phone jacks is affected.
I'm not sure if this should be addressed as a separate issue since it doesn't sound like the crackling sound mentioned in the Github discusson. (I had this type of crackling issue in the beginning, too, but could successfully get rid of it by following the suggestions in that tread.)

Best 73
Eberhard, DK8JV
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Audio Distortion 13 Nov 2023 12:48 #5

  • Tom W3FRG
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I have also had this occur several times, where shutting down (Power Cycle) and restarting solves the issue.

Tom W3FRG
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Audio Distortion 13 Nov 2023 20:01 #6

  • Tom W3FRG
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I am also encountering a situation when the SunSDR2 Dx is turned on.
When I attempt to tune in an SSB signal it will not demodulate it correctly. In fact, will not demodulate it is any mode.
I have to switch between band and mode to get it to demodulate correctly.
I have also encountered this, infrequently however, when I change bands.

Tom W3FRG
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