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RTL SDR DVB-T dongle - image rejection problems due to "phantom signal" presence

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Published on Apr 27, 2012

I am showing here a discovery that I recently made, since I was wondering whz the channel skew calibration in HDSDR was not working.

In fact it was working, but I was seeing a different spike on the 1Mhz wide FFT view.
Only zooming in brought clarity on this problem....

It's a pity, but given the ultra low cost of these dongles it is at least amazing what you can do and for weaker signals operation (as you could see on my other videos) this price is unbeatable...

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