tinySA software counterfeit? Solved.
开云体育I live in a detached house on the hill in my town spaced apart from other houses and do not have much interference.After many tests I realized that the interference is caused only when the computer is on (I tried to turn on only the 2 monitors, but they do not give interference). If I turn off the computer and the 2 monitors are on, no error, all tests are passed. If I turn on the computer (ASUS TUF i9-10900x 10 Core 3.70GHz + nvidia 4090 + 64 GB RAM) the self test gives error 3. I attach the screenshot This is something to remember if measurements are to be made. Probably a $33,000 HP spectrum analyzer under the same circumstances would not give error :)) Al Il 28/11/2024 17:18, Erik Kaashoek ha
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开云体育Spurs ?? Harmonics ??All the way to the left looks like part of one, then another on screen, then a couple of very little pips then a bigger one, etc.? If they are harmonics would the distance between indicate the fundamental frequency. Do you have a Uninterruptible backup power supply ?? Can you plug your computer into a more remove outlet in case emissions are conducted ?? Or other peripheral that powers up and down, or goes into standby with your computer being on or off ? Especially if you use your computer and USB to record data for notes etc, having to turn off the computer is a disadvantage. On 11/28/24 12:49 PM, bitliner via
groups.io wrote:
I live in a detached house on the hill in my town spaced apart from other houses and do not have much interference. |
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I only use a low noise linear supply with my TinySA and liteVNA. I power the hub also with the linear supply, with the supply from the computer disabled inside the hub. Moreover, I also only use USB cables with molded ferrite cores on both ends. This keeps the screens free of any external spurs introduced by the USB port.
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John |
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John Cunliffe W7ZQ
