Hi, I'm new here and may have missed a similar discussion.
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My TinySA duplicates frequencies starting from 1100 MHz and ending with 3500 MHz. Perhaps frequencies lower and higher are affected, I was unable to quickly find a suitable antenna. Copies are created with an offset of approximately 2 GHz. I put together a small animation of how this happens.
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Mobile bands 1.8, 2.1, 2.7 and WiFi 2.4 receive their full copies with an offset of approximately 2 GHz. That is, these are not harmonics, the offset is approximately the same for different frequencies and the signals do not differ externally either.
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Approximate numbers are as follows:
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1.1 -> 3.059
1.2 -> 3.1501
2.0 -> 3.9585
2.5 -> 4.5542
2.7 -> 4.6526
3.0 -> 4.9511
3.3 -> 5.2541
3.4 -> 5.5909
3.5 -> 5.7357
3.7 -> 6.0440
4.0 -> 6.4930
4.5 -> 7.2414
To better measure the frequency offset, I used a generator and I had even more questions. The main frequency and its harmonics were displayed on the screen exactly where they were needed, for example 1 GHz: 2, 3, 4, 5, and so on. At the same time, mobile phone signals are duplicated as before with an offset of about 2 GHz.
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Please advise what could be causing this behavior and in what direction should I move on.
So far I have tried to calibrate the device and update the firmware to the latest version. I have also studied the settings menu.
Leonis
